{"id":5711,"date":"2025-12-24T01:49:43","date_gmt":"2025-12-24T01:49:43","guid":{"rendered":"https:\/\/korea-transmission.com\/?p=5711"},"modified":"2025-12-24T01:50:38","modified_gmt":"2025-12-24T01:50:38","slug":"gb-t-3098-7-2000-self-tapping-screw-fastener-properties","status":"publish","type":"post","link":"https:\/\/korea-transmission.com\/vi\/blog\/gb-t-3098-7-2000-self-tapping-screw-fastener-properties\/","title":{"rendered":"GB\/T 3098.7-2000: \u0110\u1eb7c t\u00ednh c\u1ee7a v\u00edt t\u1ef1 ren"},"content":{"rendered":"<div style=\"margin-bottom: 30px;\">\n<h2 style=\"color: #333; font-size: 1.5em; border-bottom: 2px solid #ddd; padding-bottom: 10px;\">\u0110\u1ec1 c\u01b0\u01a1ng b\u00e0i vi\u1ebft<\/h2>\n<p style=\"margin-bottom: 15px;\">B\u00e0i vi\u1ebft n\u00e0y cung c\u1ea5p t\u1ed5ng quan c\u00f3 c\u1ea5u tr\u00fac v\u1ec1 ti\u00eau chu\u1ea9n GB\/T 3098.7-2000, \u0111\u01b0\u1ee3c t\u1ed1i \u01b0u h\u00f3a \u0111\u1ec3 d\u1ec5 hi\u1ec3u v\u00e0 \u1ee9ng d\u1ee5ng th\u1ef1c ti\u1ec5n trong k\u1ef9 thu\u1eadt c\u01a1 kh\u00ed. C\u1ea5u tr\u00fac n\u00e0y \u0111\u1ea3m b\u1ea3o bao qu\u00e1t to\u00e0n di\u1ec7n c\u00e1c kh\u00eda c\u1ea1nh ch\u00ednh:<\/p>\n<ul style=\"list-style-type: disc; padding-left: 20px; margin-bottom: 20px;\">\n<li>Gi\u1edbi thi\u1ec7u: Ph\u1ea1m vi v\u00e0 \u00fd ngh\u0129a c\u1ee7a ti\u00eau chu\u1ea9n.<\/li>\n<li>V\u1eadt li\u1ec7u: Th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc v\u00e0 h\u01b0\u1edbng d\u1eabn s\u1ea3n xu\u1ea5t.<\/li>\n<li>T\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc v\u00e0 hi\u1ec7u n\u0103ng: C\u00e1c y\u00eau c\u1ea7u chi ti\u1ebft bao g\u1ed3m \u0111\u1ed9 c\u1ee9ng, m\u00f4-men xo\u1eafn, v.v.<\/li>\n<li>Ph\u01b0\u01a1ng ph\u00e1p th\u1eed nghi\u1ec7m: C\u00e1c th\u1ee7 t\u1ee5c \u0111\u1ec3 x\u00e1c minh s\u1ef1 tu\u00e2n th\u1ee7.<\/li>\n<li>C\u1edd l\u00ea l\u1ef1c: Th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt cho thi\u1ebft b\u1ecb ki\u1ec3m tra.<\/li>\n<li>\u0110\u00e1nh d\u1ea5u: C\u00e1c y\u00eau c\u1ea7u v\u1ec1 nh\u1eadn d\u1ea1ng v\u00e0 ghi nh\u00e3n.<\/li>\n<li>C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p: Nh\u1eefng c\u00e2u h\u1ecfi ph\u1ed5 bi\u1ebfn v\u00e0 \u00fd ki\u1ebfn \u200b\u200bchuy\u00ean gia.<\/li>\n<\/ul>\n<\/div>\n<div style=\"margin-bottom: 30px;\">\n<h2 style=\"color: #333; font-size: 1.5em; border-bottom: 2px solid #ddd; padding-bottom: 10px;\">Gi\u1edbi thi\u1ec7u v\u1ec1 Ti\u00eau chu\u1ea9n GB\/T 3098.7-2000<\/h2>\n<p style=\"margin-bottom: 15px;\">Ti\u00eau chu\u1ea9n GB\/T 3098.7-2000 quy \u0111\u1ecbnh c\u00e1c \u0111\u1eb7c t\u00ednh c\u01a1 h\u1ecdc c\u1ee7a v\u00edt t\u1ef1 ren \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c lo\u1ea1i \u1ed1c v\u00edt. Ti\u00eau chu\u1ea9n n\u00e0y \u00e1p d\u1ee5ng cho c\u00e1c lo\u1ea1i v\u00edt \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t t\u1eeb \u200b\u200bth\u00e9p t\u00f4i c\u1ee9ng, \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 tin c\u1eady trong c\u00e1c \u1ee9ng d\u1ee5ng \u0111\u00f2i h\u1ecfi hi\u1ec7u su\u1ea5t cao d\u01b0\u1edbi t\u00e1c \u0111\u1ed9ng c\u1ee7a \u1ee9ng su\u1ea5t c\u01a1 h\u1ecdc. Ti\u00eau chu\u1ea9n n\u00e0y r\u1ea5t c\u1ea7n thi\u1ebft cho c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p nh\u01b0 \u00f4 t\u00f4, x\u00e2y d\u1ef1ng v\u00e0 m\u00e1y m\u00f3c, n\u01a1i v\u00edt t\u1ef1 ren cung c\u1ea5p kh\u1ea3 n\u0103ng si\u1ebft ch\u1eb7t an to\u00e0n m\u00e0 kh\u00f4ng c\u1ea7n khoan ren tr\u01b0\u1edbc.<\/p>\n<p style=\"margin-bottom: 15px;\">Nh\u1eefng l\u1ee3i \u00edch ch\u00ednh bao g\u1ed3m vi\u1ec7c ki\u1ec3m tra ti\u00eau chu\u1ea9n h\u00f3a v\u1ec1 \u0111\u1ed9 b\u1ec1n, kh\u1ea3 n\u0103ng ch\u1ed1ng h\u01b0 h\u1ecfng v\u00e0 kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch v\u1edbi nhi\u1ec1u lo\u1ea1i v\u1eadt li\u1ec7u kh\u00e1c nhau. Tu\u00e2n th\u1ee7 ti\u00eau chu\u1ea9n n\u00e0y gi\u00fap gi\u1ea3m thi\u1ec3u c\u00e1c r\u1ee7i ro nh\u01b0 hi\u1ec7n t\u01b0\u1ee3ng gi\u00f2n hydro v\u00e0 \u0111\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng \u1ed5n \u0111\u1ecbnh trong s\u1ea3n xu\u1ea5t. \u0110\u1ec3 s\u1eed d\u1ee5ng t\u1ed1i \u01b0u, c\u00e1c k\u1ef9 s\u01b0 n\u00ean t\u00edch h\u1ee3p c\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt n\u00e0y v\u00e0o quy tr\u00ecnh thi\u1ebft k\u1ebf v\u00e0 ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng.<\/p>\n<\/div>\n<div style=\"margin-bottom: 30px;\">\n<h2 style=\"color: #333; font-size: 1.5em; border-bottom: 2px solid #ddd; padding-bottom: 10px;\">Nguy\u00ean v\u1eadt li\u1ec7u<\/h2>\n<p style=\"margin-bottom: 15px;\">V\u00edt t\u1ef1 ren ph\u1ea3i \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p d\u1eadp ngu\u1ed9i t\u1eeb th\u00e9p t\u00f4i c\u1ee9ng b\u1ec1 m\u1eb7t. Th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc \u0111\u01b0\u1ee3c cung c\u1ea5p trong B\u1ea3ng 1 ch\u1ec9 mang t\u00ednh ch\u1ea5t tham kh\u1ea3o, cho ph\u00e9p s\u1ef1 linh ho\u1ea1t trong khi v\u1eabn duy tr\u00ec c\u00e1c \u0111\u1eb7c t\u00ednh c\u1ed1t l\u00f5i. N\u1ebfu h\u00e0m l\u01b0\u1ee3ng boron \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t b\u1eb1ng c\u00e1ch th\u00eam titan v\u00e0\/ho\u1eb7c nh\u00f4m \u0111\u1ec3 l\u00e0m cho n\u00f3 kh\u00f4ng c\u00f2n t\u00e1c d\u1ee5ng, h\u00e0m l\u01b0\u1ee3ng boron c\u00f3 th\u1ec3 \u0111\u1ea1t \u0111\u1ebfn 0,005%.<\/p>\n<p style=\"margin-bottom: 15px;\">H\u01b0\u1edbng d\u1eabn l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u:<\/p>\n<ul style=\"list-style-type: disc; padding-left: 20px; margin-bottom: 20px;\">\n<li>\u0110\u1ea3m b\u1ea3o th\u00e9p \u0111\u00e1p \u1ee9ng c\u00e1c gi\u1edbi h\u1ea1n v\u1ec1 h\u00e0m l\u01b0\u1ee3ng cacbon v\u00e0 mangan \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c \u0111\u1ed9 c\u1ee9ng mong mu\u1ed1n.<\/li>\n<li>Tr\u00e1nh c\u00e1c t\u1ea1p ch\u1ea5t c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn qu\u00e1 tr\u00ecnh t\u00f4i c\u1ee9ng b\u1ec1 m\u1eb7t.<\/li>\n<li>Ki\u1ec3m tra th\u00e0nh ph\u1ea7n b\u1eb1ng c\u00e1ch m\u00fac t\u1eeb n\u1ed3i n\u1ea5u v\u00e0 ki\u1ec3m tra ph\u00e2n t\u00edch \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o t\u00ednh nh\u1ea5t qu\u00e1n c\u1ee7a l\u00f4 h\u00e0ng.<\/li>\n<\/ul>\n<div class=\"table-container\" style=\"overflow-x: auto; margin-bottom: 20px;\">\n<h3 style=\"text-align: center; font-size: 1.2em; margin-bottom: 10px;\">B\u1ea3ng 1: Th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc<\/h3>\n<table style=\"border-collapse: collapse; width: 100%; margin-bottom: 20px;\">\n<thead>\n<tr style=\"background-color: #f2f2f2;\">\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\" rowspan=\"2\">Ph\u00e2n t\u00edch<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\" colspan=\"2\">Gi\u1edbi h\u1ea1n th\u00e0nh ph\u1ea7n, %<\/th>\n<\/tr>\n<tr style=\"background-color: #f2f2f2;\">\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">Cacbon<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">Mangan<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">Mu\u1ed7ng m\u00fac<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">0.15~0.25<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">0.70~1.65<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">Ki\u1ec3m tra<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">0.13~0.27<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">0.64~1.71<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<div style=\"margin-bottom: 30px;\">\n<h2 style=\"color: #333; font-size: 1.5em; border-bottom: 2px solid #ddd; padding-bottom: 10px;\">T\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc v\u00e0 hi\u1ec7u n\u0103ng<\/h2>\n<p style=\"margin-bottom: 15px;\">Ti\u00eau chu\u1ea9n n\u00e0y n\u00eau r\u00f5 c\u00e1c y\u00eau c\u1ea7u v\u1ec1 c\u01a1 h\u1ecdc v\u00e0 hi\u1ec7u n\u0103ng, v\u1edbi c\u00e1c ph\u01b0\u01a1ng ph\u00e1p th\u1eed nghi\u1ec7m \u0111\u01b0\u1ee3c tham chi\u1ebfu trong B\u1ea3ng 2. \u1ed0c v\u00edt ph\u1ea3i tr\u1ea3i qua qu\u00e1 tr\u00ecnh t\u00f4i c\u1ee9ng v\u00e0 ram \u1edf nhi\u1ec7t \u0111\u1ed9 t\u1ed1i thi\u1ec3u 340\u00b0C \u0111\u1ec3 \u0111\u00e1p \u1ee9ng c\u00e1c ti\u00eau ch\u00ed n\u00e0y.<\/p>\n<div class=\"table-container\" style=\"overflow-x: auto; margin-bottom: 20px;\">\n<h3 style=\"text-align: center; font-size: 1.2em; margin-bottom: 10px;\">B\u1ea3ng 2: C\u00e1c th\u00e0nh ph\u1ea7n thu\u1ed9c t\u00ednh c\u01a1 h\u1ecdc v\u00e0 hi\u1ec7u n\u0103ng<\/h3>\n<table style=\"border-collapse: collapse; width: 100%; margin-bottom: 20px;\">\n<thead>\n<tr style=\"background-color: #f2f2f2;\">\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">V\u1eadt ph\u1ea9m b\u1ea5t \u0111\u1ed9ng s\u1ea3n<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">Y\u00eau c\u1ea7u k\u1ef9 thu\u1eadt (\u0110i\u1ec1u kho\u1ea3n ho\u1eb7c b\u1ea3ng)<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">Ph\u01b0\u01a1ng ph\u00e1p th\u1eed nghi\u1ec7m (\u0110i\u1ec1u kho\u1ea3n)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">\u0110\u1ed9 c\u1ee9ng l\u00f5i<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">4.3<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">5.1<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">\u0110\u1ed9 c\u1ee9ng b\u1ec1 m\u1eb7t<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">4.3<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">5.2<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">\u0110\u1ed9 s\u00e2u tr\u01b0\u1eddng h\u1ee3p<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">4.4, B\u1ea3ng 4<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">5.3<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">S\u1ee9c b\u1ec1n xo\u1eafn<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">4.5, B\u1ea3ng 3<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">5.4<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">\u0110\u1ea7u kh\u1ecfe<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">4.6<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">5.5<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">Th\u1eed l\u00e1i<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">4.7, B\u1ea3ng 3<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">5.6<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">Gi\u00f2n do hydro<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">4.8<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">5.7<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">\u0110\u1ed9 c\u1ee9ng l\u00f5i sau khi t\u00f4i l\u1ea1i<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">4.9<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">5.8<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">\u0110\u1ed9 b\u1ec1n k\u00e9o<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">4.10, B\u1ea3ng 3<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">5.9<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h3 style=\"font-size: 1.2em; margin-top: 20px; margin-bottom: 10px;\">X\u1eed l\u00fd nhi\u1ec7t<\/h3>\n<p style=\"margin-bottom: 15px;\">\u1ed0c v\u00edt th\u00e0nh ph\u1ea9m c\u1ea7n \u0111\u01b0\u1ee3c t\u00f4i c\u1ee9ng b\u1ec1 m\u1eb7t v\u00e0 ram \u1edf nhi\u1ec7t \u0111\u1ed9 kh\u00f4ng d\u01b0\u1edbi 340\u00b0C, \u0111\u00e1p \u1ee9ng t\u1ea5t c\u1ea3 c\u00e1c \u0111\u1eb7c t\u00ednh trong B\u1ea3ng 3. Qu\u00e1 tr\u00ecnh n\u00e0y gi\u00fap t\u0103ng \u0111\u1ed9 c\u1ee9ng b\u1ec1 m\u1eb7t \u0111\u1ed3ng th\u1eddi duy tr\u00ec \u0111\u1ed9 d\u1ebbo dai c\u1ee7a l\u00f5i, y\u1ebfu t\u1ed1 quan tr\u1ecdng \u0111\u1ed1i v\u1edbi kh\u1ea3 n\u0103ng ch\u1ecbu m\u00f4-men xo\u1eafn.<\/p>\n<div class=\"table-container\" style=\"overflow-x: auto; margin-bottom: 20px;\">\n<h3 style=\"text-align: center; font-size: 1.2em; margin-bottom: 10px;\">B\u1ea3ng 3: Y\u00eau c\u1ea7u v\u1ec1 c\u01a1 kh\u00ed v\u00e0 hi\u1ec7u n\u0103ng<\/h3>\n<table style=\"border-collapse: collapse; width: 100%; margin-bottom: 20px;\">\n<thead>\n<tr style=\"background-color: #f2f2f2;\">\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">\u0110\u01b0\u1eddng k\u00ednh ren danh ngh\u0129a (mm)<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">C\u01b0\u1eddng \u0111\u1ed9 xo\u1eafn t\u1ed1i thi\u1ec3u (N\u00b7m)<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">M\u00f4-men xo\u1eafn truy\u1ec1n \u0111\u1ed9ng t\u1ed1i \u0111a (N\u00b7m)<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">\u0110\u1ed9 b\u1ec1n k\u00e9o t\u1ed1i thi\u1ec3u (Tham chi\u1ebfu) (N)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">2<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">0.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">0.3<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">1940<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">2.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">1.2<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">0.6<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">3150<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">3<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">2.1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">1.1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">4680<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">3.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">3.4<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">1.7<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">6300<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">4<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">4.9<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">2.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">8170<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">10<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">13200<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">6<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">17<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">8.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">18700<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">8<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">42<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">21<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">34000<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">10<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">85<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">43<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">53900<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">12<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">150<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">75<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">78400<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h3 style=\"font-size: 1.2em; margin-top: 20px; margin-bottom: 10px;\">\u0110\u1ed9 c\u1ee9ng<\/h3>\n<p style=\"margin-bottom: 15px;\">\u0110\u1ed9 c\u1ee9ng l\u00f5i ph\u1ea3i n\u1eb1m trong kho\u1ea3ng 290~370 HV10, v\u1edbi \u0111\u1ed9 c\u1ee9ng b\u1ec1 m\u1eb7t t\u1ed1i thi\u1ec3u l\u00e0 450 HV0.3. C\u00e1c gi\u00e1 tr\u1ecb n\u00e0y \u0111\u1ea3m b\u1ea3o s\u1ef1 c\u00e2n b\u1eb1ng gi\u1eefa \u0111\u1ed9 d\u1ebbo v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng m\u00e0i m\u00f2n, r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng ren t\u1ef1 ren.<\/p>\n<h3 style=\"font-size: 1.2em; margin-top: 20px; margin-bottom: 10px;\">\u0110\u1ed9 s\u00e2u tr\u01b0\u1eddng h\u1ee3p<\/h3>\n<p style=\"margin-bottom: 15px;\">\u0110\u1ed9 s\u00e2u l\u1edbp t\u00f4i ph\u1ea3i tu\u00e2n th\u1ee7 B\u1ea3ng 4, \u0111\u1ea3m b\u1ea3o l\u1edbp t\u00f4i \u0111\u1ee7 d\u00e0y \u0111\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c m\u00f4-men xo\u1eafn v\u00e0 m\u00e0i m\u00f2n m\u00e0 kh\u00f4ng g\u00e2y gi\u00f2n qu\u00e1 m\u1ee9c.<\/p>\n<div class=\"table-container\" style=\"overflow-x: auto; margin-bottom: 20px;\">\n<h3 style=\"text-align: center; font-size: 1.2em; margin-bottom: 10px;\">B\u1ea3ng 4: \u0110\u1ed9 s\u00e2u c\u1ee7a ca b\u1ec7nh<\/h3>\n<table style=\"border-collapse: collapse; width: 100%; margin-bottom: 20px;\">\n<thead>\n<tr style=\"background-color: #f2f2f2;\">\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\" rowspan=\"2\">\u0110\u01b0\u1eddng k\u00ednh ren danh ngh\u0129a (mm)<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\" colspan=\"2\">\u0110\u1ed9 d\u00e0y v\u1ecf (mm)<\/th>\n<\/tr>\n<tr style=\"background-color: #f2f2f2;\">\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">T\u1ed1i thi\u1ec3u<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">T\u1ed1i \u0111a<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">2, 2.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">0.04<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">0.12<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">3, 3.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">0.05<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">0.18<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">4, 5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">0.1<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">0.25<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">6, 8<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">0.15<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">0.28<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">10, 12<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">0.15<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">0.32<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h3 style=\"font-size: 1.2em; margin-top: 20px; margin-bottom: 10px;\">S\u1ee9c b\u1ec1n xo\u1eafn<\/h3>\n<p style=\"margin-bottom: 15px;\">\u0110\u1ed9 b\u1ec1n xo\u1eafn theo B\u1ea3ng 3; s\u1ef1 h\u1ecfng h\u00f3c kh\u00f4ng \u0111\u01b0\u1ee3c x\u1ea3y ra \u1edf c\u00e1c ren \u0111\u01b0\u1ee3c k\u1eb9p ch\u1eb7t. Th\u1eed nghi\u1ec7m n\u00e0y m\u00f4 ph\u1ecfng c\u00e1c \u1ee9ng su\u1ea5t l\u1eafp \u0111\u1eb7t th\u1ef1c t\u1ebf.<\/p>\n<h3 style=\"font-size: 1.2em; margin-top: 20px; margin-bottom: 10px;\">\u0110\u1ea7u kh\u1ecfe<\/h3>\n<p style=\"margin-bottom: 15px;\">Kh\u00f4ng c\u00f3 v\u1ebft n\u1ee9t n\u00e0o t\u1ea1i ch\u1ed7 n\u1ed1i \u0111\u1ea7u v\u00e0 th\u00e2n khi m\u1eb7t \u0111\u1ee1 bi\u1ebfn d\u1ea1ng \u1edf g\u00f3c 7\u00b0. B\u00e0i ki\u1ec3m tra \u0111\u1ea1t y\u00eau c\u1ea7u ngay c\u1ea3 khi x\u1ea3y ra l\u1ed7i \u1edf ren \u0111\u1ea7u ti\u00ean, mi\u1ec5n l\u00e0 \u0111\u1ea7u v\u1eabn c\u00f2n nguy\u00ean v\u1eb9n.<\/p>\n<h3 style=\"font-size: 1.2em; margin-top: 20px; margin-bottom: 10px;\">Kh\u1ea3 n\u0103ng t\u1ea1o s\u1ee3i<\/h3>\n<p style=\"margin-bottom: 15px;\">C\u00e1c v\u00edt ph\u1ea3i t\u1ea1o \u0111\u01b0\u1ee3c ren trong kh\u1edbp v\u1edbi nhau m\u00e0 kh\u00f4ng b\u1ecb bi\u1ebfn d\u1ea1ng v\u0129nh vi\u1ec5n, v\u1edbi m\u00f4-men xo\u1eafn khi v\u1eb7n kh\u00f4ng v\u01b0\u1ee3t qu\u00e1 c\u00e1c gi\u00e1 tr\u1ecb trong B\u1ea3ng 3. Ren \u0111\u00e3 t\u1ea1o ph\u1ea3i ch\u1ea5p nh\u1eadn ren ngo\u00e0i c\u00f3 dung sai GB\/T 197 6h v\u00e0 ch\u1ecbu \u0111\u01b0\u1ee3c t\u1ea3i tr\u1ecdng c\u1ea5p 8 theo GB\/T 3098.2.<\/p>\n<h3 style=\"font-size: 1.2em; margin-top: 20px; margin-bottom: 10px;\">Kh\u1ea3 n\u0103ng ch\u1ed1ng gi\u00f2n hydro<\/h3>\n<p style=\"margin-bottom: 15px;\">\u1ed0c v\u00edt m\u1ea1 \u0111i\u1ec7n c\u1ea7n \u0111\u01b0\u1ee3c xem x\u00e9t quy tr\u00ecnh theo ti\u00eau chu\u1ea9n GB\/T 3098.17 \u0111\u1ec3 ki\u1ec3m so\u00e1t hi\u1ec7n t\u01b0\u1ee3ng gi\u00f2n hydro. Sau khi m\u1ea1, th\u1ef1c hi\u1ec7n lo\u1ea1i b\u1ecf hydro theo ti\u00eau chu\u1ea9n GB\/T 5267. N\u00ean s\u1eed d\u1ee5ng l\u1edbp ph\u1ee7 k\u1ebdm d\u1ea1ng v\u1ea3y kh\u00f4ng \u0111i\u1ec7n ph\u00e2n theo ti\u00eau chu\u1ea9n ISO 10683.<\/p>\n<h3 style=\"font-size: 1.2em; margin-top: 20px; margin-bottom: 10px;\">\u0110\u1ed9 c\u1ee9ng l\u00f5i sau khi t\u00f4i l\u1ea1i<\/h3>\n<p style=\"margin-bottom: 15px;\">\u0110\u1ed9 gi\u1ea3m \u0111\u1ed9 c\u1ee9ng sau khi t\u00f4i l\u1ea1i kh\u00f4ng \u0111\u01b0\u1ee3c v\u01b0\u1ee3t qu\u00e1 20 HV, \u0111\u1ea3m b\u1ea3o t\u00ednh \u1ed5n \u0111\u1ecbnh trong qu\u00e1 tr\u00ecnh s\u1eed d\u1ee5ng.<\/p>\n<h3 style=\"font-size: 1.2em; margin-top: 20px; margin-bottom: 10px;\">\u0110\u1ed9 b\u1ec1n k\u00e9o<\/h3>\n<p style=\"margin-bottom: 15px;\">\u0110\u1ed1i v\u1edbi v\u00edt c\u00f3 \u0111\u01b0\u1eddng k\u00ednh \u226512 mm ho\u1eb7c chi\u1ec1u d\u00e0i \u22653d, ti\u1ebfn h\u00e0nh th\u1eed nghi\u1ec7m \u0111\u1ed9 b\u1ec1n k\u00e9o theo th\u1ecfa thu\u1eadn; c\u00e1c gi\u00e1 tr\u1ecb tham kh\u1ea3o trong B\u1ea3ng 3 h\u01b0\u1edbng d\u1eabn hi\u1ec7u su\u1ea5t d\u1ef1 ki\u1ebfn.<\/p>\n<\/div>\n<div style=\"margin-bottom: 30px;\">\n<h2 style=\"color: #333; font-size: 1.5em; border-bottom: 2px solid #ddd; padding-bottom: 10px;\">Ph\u01b0\u01a1ng ph\u00e1p th\u1eed nghi\u1ec7m<\/h2>\n<h3 style=\"font-size: 1.2em; margin-top: 20px; margin-bottom: 10px;\">Ki\u1ec3m tra \u0111\u1ed9 c\u1ee9ng l\u00f5i<\/h3>\n<p style=\"margin-bottom: 15px;\">\u0110o t\u1ea1i \u0111i\u1ec3m gi\u1eefa b\u00e1n k\u00ednh tr\u00ean m\u1eb7t c\u1eaft ngang c\u00e1ch xa \u0111\u1ea7u, xuy\u00ean qua \u0111\u01b0\u1eddng k\u00ednh nh\u1ecf, theo ti\u00eau chu\u1ea9n GB\/T 4340.1. \u0110i\u1ec1u n\u00e0y gi\u00fap x\u00e1c minh \u0111\u1ed9 b\u1ec1n b\u00ean trong.<\/p>\n<h3 style=\"font-size: 1.2em; margin-top: 20px; margin-bottom: 10px;\">Ki\u1ec3m tra \u0111\u1ed9 c\u1ee9ng b\u1ec1 m\u1eb7t<\/h3>\n<p style=\"margin-bottom: 15px;\">Quy tr\u00ecnh th\u00f4ng th\u01b0\u1eddng: T\u1ea1i \u0111\u1ea7u, th\u00e2n ho\u1eb7c \u0111\u1ea7u theo ti\u00eau chu\u1ea9n GB\/T 4340.1 sau khi lo\u1ea1i b\u1ecf l\u1edbp ph\u1ee7. Tr\u1ecdng t\u00e0i: \u0110\u1ed9 c\u1ee9ng vi Vickers HV0.1 tr\u00ean m\u1eb7t c\u1eaft c\u00f3 \u0111\u01b0\u1eddng k\u00ednh \u22654 mm, c\u00e1ch m\u00e9p \u22650.05 mm; th\u01b0\u01a1ng l\u01b0\u1ee3ng \u0111\u1ed1i v\u1edbi \u0111\u01b0\u1eddng k\u00ednh &lt;4 mm.<\/p>\n<h3 style=\"font-size: 1.2em; margin-top: 20px; margin-bottom: 10px;\">Ki\u1ec3m tra \u0111\u1ed9 s\u00e2u tr\u01b0\u1eddng h\u1ee3p<\/h3>\n<p style=\"margin-bottom: 15px;\">Kho\u1ea3ng c\u00e1ch t\u1eeb b\u1ec1 m\u1eb7t \u0111\u1ebfn \u0111i\u1ec3m c\u00f3 \u0111\u1ed9 c\u1ee9ng = l\u00f5i + 30 HV0.3; qu\u00e1 tr\u00ecnh ph\u00e2n x\u1eed s\u1eed d\u1ee5ng \u0111\u1ed9 c\u1ee9ng vi m\u00f4 HV0.3 tr\u00ean m\u1eabu luy\u1ec7n kim \u0111\u00e3 chu\u1ea9n b\u1ecb.<\/p>\n<h3 style=\"font-size: 1.2em; margin-top: 20px; margin-bottom: 10px;\">Ki\u1ec3m tra \u0111\u1ed9 b\u1ec1n xo\u1eafn<\/h3>\n<p style=\"margin-bottom: 15px;\">K\u1eb9p m\u1eabu th\u1eed v\u1edbi \u22652 ren ho\u00e0n ch\u1ec9nh trong \u0111\u1ed3 g\u00e1, \u22652 ren l\u1ed9 ra ngo\u00e0i; t\u00e1c d\u1ee5ng m\u00f4-men xo\u1eafn cho \u0111\u1ebfn khi h\u1ecfng, ghi l\u1ea1i gi\u00e1 tr\u1ecb theo B\u1ea3ng 3.<\/p>\n<h3 style=\"font-size: 1.2em; margin-top: 20px; margin-bottom: 10px;\">Ki\u1ec3m tra \u0111\u1ed9 l\u00e0nh c\u1ee7a \u0111\u1ea7u<\/h3>\n<p style=\"margin-bottom: 15px;\">L\u1eafp v\u00e0o n\u00eam c\u00f3 \u0111\u01b0\u1eddng k\u00ednh l\u1ed7 = \u0111\u01b0\u1eddng k\u00ednh danh ngh\u0129a +0,05 mm (\u2264M6) ho\u1eb7c +0,1 mm (&gt;M6~M12); t\u00e1c d\u1ee5ng l\u1ef1c d\u1ecdc tr\u1ee5c \u0111\u1ebfn khi bi\u1ebfn d\u1ea1ng 7\u00b0. Kh\u00f4ng d\u00f9ng cho \u0111\u1ea7u v\u00edt ch\u00ecm. S\u1eed d\u1ee5ng b\u00faa g\u00f5 n\u1ebfu c\u1ea7n.<\/p>\n<h3 style=\"font-size: 1.2em; margin-top: 20px; margin-bottom: 10px;\">Th\u1eed l\u00e1i<\/h3>\n<p style=\"margin-bottom: 15px;\">\u0110\u00e2m m\u0169i khoan v\u00e0o t\u1ea5m th\u1eed (th\u00e9p cacbon th\u1ea5p, 140~180 HV30, \u0111\u1ed9 d\u00e0y = \u0111\u01b0\u1eddng k\u00ednh danh ngh\u0129a, l\u1ed7 theo B\u1ea3ng 5) cho \u0111\u1ebfn khi c\u00f3 \u22651 ren nh\u00f4 ra. L\u1ef1c d\u1ecdc tr\u1ee5c ban \u0111\u1ea7u \u226450 N (\u2264M5) ho\u1eb7c \u2264100 N (&gt;M5); t\u1ed1c \u0111\u1ed9 \u226430 v\u00f2ng\/ph\u00fat \u0111\u1ec3 \u0111i\u1ec1u ch\u1ec9nh l\u1ef1c. Th\u00eam ch\u1ea5t b\u00f4i tr\u01a1n n\u1ebfu c\u1ea7n.<\/p>\n<div class=\"table-container\" style=\"overflow-x: auto; margin-bottom: 20px;\">\n<h3 style=\"text-align: center; font-size: 1.2em; margin-bottom: 10px;\">B\u1ea3ng 5: \u0110\u1ed9 d\u00e0y t\u1ea5m th\u1eed nghi\u1ec7m v\u00e0 \u0111\u01b0\u1eddng k\u00ednh l\u1ed7<\/h3>\n<table style=\"border-collapse: collapse; width: 100%; margin-bottom: 20px;\">\n<thead>\n<tr style=\"background-color: #f2f2f2;\">\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\" colspan=\"2\">\u0110\u01b0\u1eddng k\u00ednh ren danh ngh\u0129a (mm)<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">2<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">2.5<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">3<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">3.5<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">4<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">5<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">6<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">8<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">10<\/th>\n<th style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">12<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\" colspan=\"2\">\u0110\u1ed9 d\u00e0y (mm)<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">2<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">2.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">3<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">3.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">4<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">6<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">8<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">10<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">12<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\" rowspan=\"2\">\u0110\u01b0\u1eddng k\u00ednh l\u1ed7 (mm)<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">T\u1ed1i \u0111a<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">1.825<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">2.275<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">2.775<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">3.18<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">3.68<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">4.53<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">5.43<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">7.336<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">9.236<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">11.143<\/td>\n<\/tr>\n<tr>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">T\u1ed1i thi\u1ec3u<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">1.8<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">2.25<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">2.75<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">3.15<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">3.65<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">4.5<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">5.4<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">7.3<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">9.2<\/td>\n<td style=\"border: 1px solid #ddd; padding: 8px; text-align: left;\">11.1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p style=\"margin-bottom: 15px;\">L\u01b0u \u00fd: Dung sai \u0111\u1ed9 d\u00e0y t\u1ea5m th\u1eed theo ti\u00eau chu\u1ea9n GB\/T 709 \u0111\u1ed1i v\u1edbi th\u00e9p t\u1ea5m c\u00e1n.<\/p>\n<h3 style=\"font-size: 1.2em; margin-top: 20px; margin-bottom: 10px;\">Th\u1eed nghi\u1ec7m gi\u00f2n hydro<\/h3>\n<p style=\"margin-bottom: 15px;\">Theo ti\u00eau chu\u1ea9n GB\/T 3098.17, s\u1eed d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p h\u1ed7 tr\u1ee3 song song \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 ki\u1ec3m so\u00e1t quy tr\u00ecnh.<\/p>\n<h3 style=\"font-size: 1.2em; margin-top: 20px; margin-bottom: 10px;\">Th\u1eed nghi\u1ec7m t\u00f4i luy\u1ec7n l\u1ea1i<\/h3>\n<p style=\"margin-bottom: 15px;\">\u1ede 330\u00b0C trong 1 gi\u1edd; gi\u00e1 tr\u1ecb trung b\u00ecnh c\u1ee7a ba \u0111i\u1ec3m \u0111o \u0111\u1ed9 c\u1ee9ng l\u00f5i ch\u00eanh l\u1ec7ch \u226420 HV tr\u01b0\u1edbc v\u00e0 sau khi x\u1eed l\u00fd. Ch\u1ec9 d\u00f9ng \u0111\u1ec3 ph\u00e2n x\u1eed.<\/p>\n<h3 style=\"font-size: 1.2em; margin-top: 20px; margin-bottom: 10px;\">Th\u1eed nghi\u1ec7m k\u00e9o<\/h3>\n<p style=\"margin-bottom: 15px;\">K\u1eb9p c\u00f3 \u22656 ren l\u1ed9 ra ngo\u00e0i; t\u00e1c d\u1ee5ng t\u1ea3i tr\u1ecdng d\u1ecdc tr\u1ee5c \u226425 mm\/ph\u00fat cho \u0111\u1ebfn khi h\u1ecfng. H\u1ecfng \u1edf ph\u1ea7n th\u00e2n ho\u1eb7c ren, kh\u00f4ng ph\u1ea3i \u1edf ch\u1ed7 n\u1ed1i \u0111\u1ea7u; c\u1ea7n c\u00f3 k\u1eb9p t\u1ef1 \u0111\u1ecbnh t\u00e2m.<\/p>\n<\/div>\n<div style=\"margin-bottom: 30px;\">\n<h2 style=\"color: #333; font-size: 1.5em; border-bottom: 2px solid #ddd; padding-bottom: 10px;\">C\u1edd l\u00ea l\u1ef1c<\/h2>\n<p style=\"margin-bottom: 15px;\">\u0110\u1ed1i v\u1edbi c\u00e1c th\u1eed nghi\u1ec7m xo\u1eafn v\u00e0 truy\u1ec1n \u0111\u1ed9ng, sai s\u1ed1 \u2264\u00b13% so v\u1edbi m\u00f4-men xo\u1eafn quy \u0111\u1ecbnh. Cho ph\u00e9p s\u1eed d\u1ee5ng c\u00e1c thi\u1ebft b\u1ecb c\u00f3 c\u00f4ng su\u1ea5t t\u01b0\u01a1ng \u0111\u01b0\u01a1ng; h\u01b0\u1edbng d\u1eabn s\u1eed d\u1ee5ng \u0111\u1ec3 ph\u00e2n x\u1eed. Hi\u1ec7u chu\u1ea9n \u0111\u1ea3m b\u1ea3o \u0111\u00e1nh gi\u00e1 ch\u00ednh x\u00e1c hi\u1ec7u su\u1ea5t c\u1ee7a v\u00edt d\u01b0\u1edbi t\u1ea3i tr\u1ecdng.<\/p>\n<\/div>\n<div style=\"margin-bottom: 30px;\">\n<h2 style=\"color: #333; font-size: 1.5em; border-bottom: 2px solid #ddd; padding-bottom: 10px;\">\u0110\u00e1nh d\u1ea5u<\/h2>\n<h3 style=\"font-size: 1.2em; margin-top: 20px; margin-bottom: 10px;\">M\u00e3 \u0111\u00e1nh d\u1ea5u<\/h3>\n<p style=\"margin-bottom: 15px;\">\u1ed0c v\u00edt t\u1ef1 ren \u0111\u01b0\u1ee3c t\u00f4i c\u1ee9ng v\u00e0 ram nhi\u1ec7t, c\u00f3 kh\u1eafc k\u00fd hi\u1ec7u \u201c-O-\u201d.<\/p>\n<h3 style=\"font-size: 1.2em; margin-top: 20px; margin-bottom: 10px;\">Nh\u1eadn d\u1ea1ng<\/h3>\n<p style=\"margin-bottom: 15px;\">C\u1ea7n c\u00f3 d\u1ea5u kh\u1eafc l\u00f5m ho\u1eb7c n\u1ed5i \u0111\u1ed1i v\u1edbi c\u00e1c \u0111\u1ea7u l\u1ee5c gi\u00e1c ho\u1eb7c l\u1ee5c gi\u00e1c th\u00f9y c\u00f3 \u0111\u01b0\u1eddng k\u00ednh danh ngh\u0129a \u22655 mm, t\u1ed1t nh\u1ea5t l\u00e0 tr\u00ean \u0111\u1ea7u. Theo th\u1ecfa thu\u1eadn \u0111\u1ed1i v\u1edbi c\u00e1c lo\u1ea1i kh\u00e1c.<\/p>\n<h3 style=\"font-size: 1.2em; margin-top: 20px; margin-bottom: 10px;\">D\u1ea5u hi\u1ec7u nh\u1eadn d\u1ea1ng c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t<\/h3>\n<p style=\"margin-bottom: 15px;\">B\u1eaft bu\u1ed9c \u0111\u1ed1i v\u1edbi t\u1ea5t c\u1ea3 c\u00e1c s\u1ea3n ph\u1ea9m c\u00f3 g\u1eafn nh\u00e3n, \u0111\u1ea3m b\u1ea3o kh\u1ea3 n\u0103ng truy xu\u1ea5t ngu\u1ed3n g\u1ed1c v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng.<\/p>\n<\/div>\n<div style=\"margin-bottom: 30px;\">\n<h2 style=\"color: #333; font-size: 1.5em; border-bottom: 2px solid #ddd; padding-bottom: 10px;\">C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n<ol style=\"list-style-type: decimal; padding-left: 20px; margin-bottom: 20px;\">\n<li style=\"margin-bottom: 15px;\"><strong>T\u00f4i c\u1ee9ng b\u1ec1 m\u1eb7t v\u00edt t\u1ef1 ren c\u00f3 t\u00e1c d\u1ee5ng g\u00ec?<\/strong><br \/>\nT\u00f4i c\u1ee9ng b\u1ec1 m\u1eb7t t\u1ea1o ra m\u1ed9t b\u1ec1 m\u1eb7t c\u1ee9ng \u0111\u1ec3 t\u1ea1o ren v\u00e0 ch\u1ed1ng m\u00e0i m\u00f2n, \u0111\u1ed3ng th\u1eddi gi\u1eef cho l\u00f5i c\u00f3 \u0111\u1ed9 d\u1ebbo \u0111\u1ec3 ng\u0103n ng\u1eeba s\u1ef1 g\u00e3y gi\u00f2n d\u01b0\u1edbi t\u00e1c \u0111\u1ed9ng c\u1ee7a m\u00f4-men xo\u1eafn ho\u1eb7c l\u1ef1c c\u0103ng, nh\u01b0 \u0111\u00e3 quy \u0111\u1ecbnh trong \u0111i\u1ec1u kho\u1ea3n 4.2 v\u00e0 4.3.<\/li>\n<li style=\"margin-bottom: 15px;\"><strong>L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 gi\u1ea3m thi\u1ec3u hi\u1ec7n t\u01b0\u1ee3ng gi\u00f2n hydro trong c\u00e1c \u1ed1c v\u00edt m\u1ea1 \u0111i\u1ec7n?<\/strong><br \/>\nTh\u1ef1c hi\u1ec7n c\u00e1c bi\u1ec7n ph\u00e1p ki\u1ec3m so\u00e1t quy tr\u00ecnh theo ti\u00eau chu\u1ea9n GB\/T 3098.17, ti\u1ebfn h\u00e0nh lo\u1ea1i b\u1ecf hydro sau khi m\u1ea1 theo ti\u00eau chu\u1ea9n GB\/T 5267 v\u00e0 xem x\u00e9t s\u1eed d\u1ee5ng c\u00e1c l\u1edbp ph\u1ee7 kh\u00f4ng \u0111i\u1ec7n ph\u00e2n nh\u01b0 k\u1ebdm d\u1ea1ng v\u1ea3y theo ti\u00eau chu\u1ea9n ISO 10683 \u0111\u1ec3 gi\u1ea3m thi\u1ec3u r\u1ee7i ro.<\/li>\n<li style=\"margin-bottom: 15px;\"><strong>\u0110i\u1ec1u g\u00ec s\u1ebd x\u1ea3y ra n\u1ebfu m\u1ed9t con v\u00edt kh\u00f4ng v\u01b0\u1ee3t qua \u0111\u01b0\u1ee3c b\u00e0i ki\u1ec3m tra \u0111\u1ed9 b\u1ec1n xo\u1eafn \u1edf khu v\u1ef1c \u0111\u01b0\u1ee3c k\u1eb9p ch\u1eb7t?<\/strong><br \/>\nS\u1ef1 h\u1ecfng h\u00f3c \u1edf c\u00e1c ren \u0111\u01b0\u1ee3c k\u1eb9p s\u1ebd l\u00e0m cho th\u1eed nghi\u1ec7m kh\u00f4ng h\u1ee3p l\u1ec7; \u0111\u1ea3m b\u1ea3o vi\u1ec7c c\u1ed1 \u0111\u1ecbnh \u0111\u00fang c\u00e1ch v\u1edbi \u00edt nh\u1ea5t hai ren \u0111\u01b0\u1ee3c k\u1eb9p v\u00e0 l\u1ed9 ra ngo\u00e0i, nh\u01b0 trong m\u1ee5c 5.4, \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 ch\u00ednh x\u00e1c \u0111\u1ed9 b\u1ec1n v\u1eadt li\u1ec7u.<\/li>\n<li style=\"margin-bottom: 15px;\"><strong>Ki\u1ec3m tra \u0111\u1ed9 b\u1ec1n k\u00e9o c\u00f3 b\u1eaft bu\u1ed9c \u0111\u1ed1i v\u1edbi t\u1ea5t c\u1ea3 c\u00e1c lo\u1ea1i v\u00edt t\u1ef1 ren kh\u00f4ng?<\/strong><br \/>\nKh\u00f4ng, ch\u1ec9 \u00e1p d\u1ee5ng cho chi\u1ec1u d\u00e0i \u226512 mm ho\u1eb7c \u22653d theo th\u1ecfa thu\u1eadn gi\u1eefa nh\u00e0 cung c\u1ea5p v\u00e0 ng\u01b0\u1eddi mua; c\u00e1c gi\u00e1 tr\u1ecb trong B\u1ea3ng 3 ch\u1ec9 mang t\u00ednh tham kh\u1ea3o, nh\u1ea5n m\u1ea1nh c\u00e1c \u0111\u1eb7c t\u00ednh xo\u1eafn v\u00e0 truy\u1ec1n \u0111\u1ed9ng l\u00e0 c\u00e1c ch\u1ec9 s\u1ed1 ch\u00ednh.<\/li>\n<li style=\"margin-bottom: 15px;\"><strong>\u0110\u1ed9 s\u00e2u c\u1ee7a r\u00e3nh v\u00edt \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t c\u1ee7a v\u00edt nh\u01b0 th\u1ebf n\u00e0o?<\/strong><br \/>\n\u0110\u1ed9 s\u00e2u kh\u00f4ng \u0111\u1ee7 c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn m\u00e0i m\u00f2n s\u1edbm ho\u1eb7c h\u1ecfng h\u00f3c trong qu\u00e1 tr\u00ecnh t\u1ea1o ren, trong khi \u0111\u1ed9 s\u00e2u qu\u00e1 m\u1ee9c l\u00e0m t\u0103ng \u0111\u1ed9 gi\u00f2n; c\u1ea7n tu\u00e2n th\u1ee7 c\u00e1c gi\u1edbi h\u1ea1n trong B\u1ea3ng 4 \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o c\u00e1c \u0111\u1eb7c t\u00ednh c\u00e2n b\u1eb1ng trong c\u00e1c \u1ee9ng d\u1ee5ng nh\u01b0 l\u1eafp r\u00e1p th\u00e9p.<\/li>\n<li style=\"margin-bottom: 15px;\"><strong>N\u00ean s\u1eed d\u1ee5ng lo\u1ea1i thi\u1ebft b\u1ecb n\u00e0o cho c\u00e1c b\u00e0i ki\u1ec3m tra tr\u1ecdng t\u00e0i?<\/strong><br \/>\nS\u1eed d\u1ee5ng c\u1edd l\u00ea l\u1ef1c c\u1ea7m tay c\u00f3 \u0111\u1ed9 ch\u00ednh x\u00e1c \u00b13% cho c\u00e1c th\u1eed nghi\u1ec7m xo\u1eafn v\u00e0 truy\u1ec1n \u0111\u1ed9ng, v\u00e0 \u0111\u1ed9 c\u1ee9ng vi m\u00f4 Vickers \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111\u1ed9 s\u00e2u b\u1ec1 m\u1eb7t v\u00e0 \u0111\u1ed9 c\u1ee9ng l\u1edbp t\u00f4i nh\u1eb1m \u0111\u1ea3m b\u1ea3o k\u1ebft qu\u1ea3 ch\u00ednh x\u00e1c v\u00e0 kh\u00e1ch quan.<\/li>\n<\/ol>\n<\/div>\n<p>&nbsp;<\/p>","protected":false},"excerpt":{"rendered":"<p>Article Outline This article provides a structured overview of the GB\/T 3098.7-2000 standard, optimized for clarity and practical application in mechanical engineering. The outline ensures comprehensive coverage of key aspects: Introduction: Scope and significance of the standard. Materials: Chemical composition and manufacturing guidelines. Mechanical and Performance Properties: Detailed requirements including hardness, torque, and more. Test [&hellip;]<\/p>","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[220],"tags":[],"class_list":["post-5711","post","type-post","status-publish","format-standard","hentry","category-technical-documentation-and-references"],"_links":{"self":[{"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/posts\/5711","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/comments?post=5711"}],"version-history":[{"count":2,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/posts\/5711\/revisions"}],"predecessor-version":[{"id":5713,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/posts\/5711\/revisions\/5713"}],"wp:attachment":[{"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/media?parent=5711"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/categories?post=5711"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/tags?post=5711"}],"curies":[{"name":"trang web","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}