{"id":5700,"date":"2025-12-24T01:08:36","date_gmt":"2025-12-24T01:08:36","guid":{"rendered":"https:\/\/korea-transmission.com\/?p=5700"},"modified":"2025-12-24T01:08:36","modified_gmt":"2025-12-24T01:08:36","slug":"gb-t-3098-11-2002-self-drilling-tapping-screws-properties","status":"publish","type":"post","link":"https:\/\/korea-transmission.com\/vi\/blog\/gb-t-3098-11-2002-self-drilling-tapping-screws-properties\/","title":{"rendered":"GB\/T 3098.11-2002: \u0110\u1eb7c t\u00ednh c\u1ee7a v\u00edt t\u1ef1 khoan ren"},"content":{"rendered":"<h2 style=\"font-size: 24px; margin-top: 40px;\">\u0110\u1ec1 c\u01b0\u01a1ng c\u1ee7a Ti\u00eau chu\u1ea9n<\/h2>\n<p style=\"margin-bottom: 20px;\">Ti\u00eau chu\u1ea9n n\u00e0y quy \u0111\u1ecbnh c\u00e1c \u0111\u1eb7c t\u00ednh c\u01a1 h\u1ecdc v\u00e0 ph\u01b0\u01a1ng ph\u00e1p th\u1eed nghi\u1ec7m \u0111\u1ed1i v\u1edbi v\u00edt t\u1ef1 khoan ren. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 d\u00e0n \u00fd c\u00f3 c\u1ea5u tr\u00fac \u0111\u1ec3 h\u01b0\u1edbng d\u1eabn ng\u01b0\u1eddi \u0111\u1ecdc qua c\u00e1c ph\u1ea7n ch\u00ednh:<\/p>\n<ul style=\"list-style-type: disc; margin-bottom: 20px;\">\n<li><strong>Y\u00eau c\u1ea7u k\u1ef9 thu\u1eadt<\/strong>Bao g\u1ed3m c\u00e1c ti\u00eau ch\u00ed v\u1ec1 v\u1eadt li\u1ec7u, t\u00ednh ch\u1ea5t luy\u1ec7n kim v\u00e0 hi\u1ec7u su\u1ea5t c\u01a1 h\u1ecdc.<\/li>\n<li><strong>Ph\u01b0\u01a1ng ph\u00e1p th\u1eed nghi\u1ec7m<\/strong>M\u00f4 t\u1ea3 chi ti\u1ebft c\u00e1c quy tr\u00ecnh ki\u1ec3m tra luy\u1ec7n kim v\u00e0 c\u01a1 h\u1ecdc.<\/li>\n<li><strong>Th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a c\u1edd l\u00ea l\u1ef1c<\/strong>Y\u00eau c\u1ea7u \u0111\u1ed1i v\u1edbi c\u00e1c d\u1ee5ng c\u1ee5 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong th\u1eed nghi\u1ec7m momen xo\u1eafn.<\/li>\n<li><strong>C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/strong>C\u00e1c c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u00e0 nh\u1eefng hi\u1ec3u bi\u1ebft chuy\u00ean m\u00f4n.<\/li>\n<\/ul>\n<h2 style=\"font-size: 24px; margin-top: 40px;\">Y\u00eau c\u1ea7u k\u1ef9 thu\u1eadt<\/h2>\n<p style=\"margin-bottom: 20px;\">Ti\u00eau chu\u1ea9n n\u00e0y n\u00eau r\u00f5 c\u00e1c y\u00eau c\u1ea7u ch\u00ednh x\u00e1c \u0111\u1ed1i v\u1edbi v\u00edt t\u1ef1 khoan v\u00e0 ren \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 tin c\u1eady trong c\u00e1c \u1ee9ng d\u1ee5ng l\u1eafp gh\u00e9p. Lo\u1ea1i v\u00edt n\u00e0y \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 khoan v\u00e0 t\u1ea1o ren trong m\u1ed9t thao t\u00e1c duy nh\u1ea5t, th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong ng\u00e0nh x\u00e2y d\u1ef1ng, \u00f4 t\u00f4 v\u00e0 m\u00e1y m\u00f3c.<\/p>\n<h3 style=\"font-size: 20px; margin-top: 20px;\">Nguy\u00ean v\u1eadt li\u1ec7u<\/h3>\n<p style=\"margin-bottom: 20px;\">V\u00edt t\u1ef1 khoan ph\u1ea3i \u0111\u01b0\u1ee3c ch\u1ebf t\u1ea1o t\u1eeb th\u00e9p t\u00f4i c\u1ee9ng ho\u1eb7c th\u00e9p x\u1eed l\u00fd nhi\u1ec7t. Vi\u1ec7c l\u1ef1a ch\u1ecdn n\u00e0y \u0111\u1ea3m b\u1ea3o s\u1ef1 c\u00e2n b\u1eb1ng c\u1ea7n thi\u1ebft gi\u1eefa \u0111\u1ed9 d\u1ebbo \u1edf l\u00f5i v\u00e0 \u0111\u1ed9 c\u1ee9ng tr\u00ean b\u1ec1 m\u1eb7t, \u0111i\u1ec1u r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 khoan xuy\u00ean qua c\u00e1c v\u1eadt li\u1ec7u nh\u01b0 th\u00e9p ho\u1eb7c nh\u00f4m m\u00e0 kh\u00f4ng c\u1ea7n khoan m\u1ed3i.<\/p>\n<h3 style=\"font-size: 20px; margin-top: 20px;\">T\u00ednh ch\u1ea5t luy\u1ec7n kim<\/h3>\n<p style=\"margin-bottom: 20px;\">C\u00e1c \u0111\u1eb7c t\u00ednh luy\u1ec7n kim r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi hi\u1ec7u su\u1ea5t c\u1ee7a v\u00edt khi ch\u1ecbu \u1ee9ng su\u1ea5t. X\u1eed l\u00fd nhi\u1ec7t \u0111\u00fang c\u00e1ch gi\u00fap ng\u0103n ng\u1eeba c\u00e1c h\u01b0 h\u1ecfng nh\u01b0 n\u1ee9t ho\u1eb7c gi\u00f2n.<\/p>\n<h4 style=\"font-size: 18px; margin-top: 15px;\">\u0110\u1ed9 c\u1ee9ng b\u1ec1 m\u1eb7t<\/h4>\n<p style=\"margin-bottom: 20px;\">Sau khi x\u1eed l\u00fd nhi\u1ec7t, \u0111\u1ed9 c\u1ee9ng b\u1ec1 m\u1eb7t c\u1ee7a v\u00edt t\u1ef1 khoan ph\u1ea3i \u0111\u1ea1t \u00edt nh\u1ea5t 530 HV 0.3. \u0110\u1ed9 c\u1ee9ng b\u1ec1 m\u1eb7t cao n\u00e0y cho ph\u00e9p khoan v\u00e0 t\u1ea1o ren hi\u1ec7u qu\u1ea3, gi\u1ea3m m\u00e0i m\u00f2n \u0111\u1ea7u v\u00edt trong qu\u00e1 tr\u00ecnh l\u1eafp \u0111\u1eb7t.<\/p>\n<h4 style=\"font-size: 18px; margin-top: 15px;\">\u0110\u1ed9 c\u1ee9ng l\u00f5i<\/h4>\n<p style=\"margin-bottom: 20px;\">\u0110\u1ed9 c\u1ee9ng l\u00f5i sau khi x\u1eed l\u00fd \u0111\u01b0\u1ee3c quy \u0111\u1ecbnh nh\u01b0 sau:<\/p>\n<ul style=\"list-style-type: disc; margin-bottom: 20px;\">\n<li>T\u1eeb 320 HV 5 \u0111\u1ebfn 400 HV 5 cho c\u00e1c k\u00edch th\u01b0\u1edbc ren \u2264 ST 4.2.<\/li>\n<li>T\u1eeb 320 HV 10 \u0111\u1ebfn 400 HV 10 cho c\u00e1c k\u00edch th\u01b0\u1edbc ren &gt; ST 4.2.<\/li>\n<\/ul>\n<p style=\"margin-bottom: 20px;\">Nhi\u1ec7t \u0111\u1ed9 t\u00f4i luy\u1ec7n t\u1ed1i thi\u1ec3u \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb l\u00e0 330\u00b0C. Tr\u00e1nh t\u00f4i luy\u1ec7n trong kho\u1ea3ng nhi\u1ec7t \u0111\u1ed9 t\u1eeb 275\u00b0C \u0111\u1ebfn 315\u00b0C \u0111\u1ec3 gi\u1ea3m thi\u1ec3u nguy c\u01a1 gi\u00f2n mactenxit t\u00f4i luy\u1ec7n, c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn h\u1ecfng h\u00f3c s\u1edbm d\u01b0\u1edbi t\u1ea3i tr\u1ecdng.<\/p>\n<h4 style=\"font-size: 18px; margin-top: 15px;\">\u0110\u1ed9 s\u00e2u tr\u01b0\u1eddng h\u1ee3p<\/h4>\n<p style=\"margin-bottom: 20px;\">\u0110\u1ed9 s\u00e2u l\u1edbp t\u00f4i c\u1ee9ng ph\u1ea3i tu\u00e2n th\u1ee7 c\u00e1c gi\u00e1 tr\u1ecb trong B\u1ea3ng 1. \u0110\u1ed9 s\u00e2u n\u00e0y \u0111\u1ea3m b\u1ea3o l\u1edbp t\u00f4i c\u1ee9ng \u0111\u1ee7 d\u00e0y \u0111\u1ec3 khoan trong khi v\u1eabn duy tr\u00ec \u0111\u1ed9 d\u1ebbo dai c\u1ee7a l\u00f5i.<\/p>\n<div class=\"scroll-table\" style=\"overflow-x: auto; margin-bottom: 20px;\">\n<table style=\"width: 100%;\">\n<caption style=\"text-align: center; font-weight: bold; margin-bottom: 10px;\">B\u1ea3ng 1: \u0110\u1ed9 s\u00e2u c\u1ee7a ca b\u1ec7nh<\/caption>\n<thead>\n<tr>\n<th style=\"width: 45%;\">K\u00edch th\u01b0\u1edbc s\u1ee3i<\/th>\n<th style=\"width: 25.6667%;\">T\u1ed1i thi\u1ec3u (mm)<\/th>\n<th style=\"width: 26.6667%;\">T\u1ed1i \u0111a (mm)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"width: 45%;\">ST 2.9 v\u00e0 ST 3.5<\/td>\n<td style=\"width: 25.6667%;\">0.05<\/td>\n<td style=\"width: 26.6667%;\">0.18<\/td>\n<\/tr>\n<tr>\n<td style=\"width: 45%;\">ST 4.2 \u0111\u1ebfn ST 5.5<\/td>\n<td style=\"width: 25.6667%;\">0.10<\/td>\n<td style=\"width: 26.6667%;\">0.23<\/td>\n<\/tr>\n<tr>\n<td style=\"width: 45%;\">ST 6.3<\/td>\n<td style=\"width: 25.6667%;\">0.15<\/td>\n<td style=\"width: 26.6667%;\">0.28<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h4 style=\"font-size: 18px; margin-top: 15px;\">C\u1ea5u tr\u00fac vi m\u00f4<\/h4>\n<p style=\"margin-bottom: 20px;\">Trong c\u1ea5u tr\u00fac vi m\u00f4 \u0111\u01b0\u1ee3c x\u1eed l\u00fd nhi\u1ec7t, kh\u00f4ng \u0111\u01b0\u1ee3c c\u00f3 ferit d\u1ea1ng d\u1ea3i xu\u1ea5t hi\u1ec7n gi\u1eefa l\u1edbp c\u1ee9ng b\u1ec1 m\u1eb7t v\u00e0 l\u00f5i. \u0110i\u1ec1u n\u00e0y \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 b\u1ec1n \u0111\u1ed3ng \u0111\u1ec1u v\u00e0 ng\u0103n ng\u1eeba c\u00e1c v\u00f9ng y\u1ebfu c\u00f3 th\u1ec3 g\u00e2y ra h\u1ecfng do c\u1eaft.<\/p>\n<h4 style=\"font-size: 18px; margin-top: 15px;\">Gi\u00f2n do hydro<\/h4>\n<p style=\"margin-bottom: 20px;\">\u1ed0c v\u00edt t\u1ef1 khoan m\u1ea1 \u0111i\u1ec7n c\u00f3 nguy c\u01a1 b\u1ecb g\u00e3y do hi\u1ec7n t\u01b0\u1ee3ng gi\u00f2n hydro. C\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t v\u00e0 \u0111\u01a1n v\u1ecb m\u1ea1 ph\u1ea3i th\u1ef1c hi\u1ec7n c\u00e1c bi\u1ec7n ph\u00e1p, bao g\u1ed3m c\u1ea3 vi\u1ec7c th\u1eed nghi\u1ec7m theo ti\u00eau chu\u1ea9n GB\/T 3098.17, \u0111\u1ec3 ki\u1ec3m so\u00e1t r\u1ee7i ro n\u00e0y. Ngo\u00e0i ra, c\u1ea7n xem x\u00e9t c\u00e1c y\u00eau c\u1ea7u gi\u1ea3m thi\u1ec3u hi\u1ec7n t\u01b0\u1ee3ng gi\u00f2n hydro trong ti\u00eau chu\u1ea9n GB\/T 5267.1 \u0111\u1ed1i v\u1edbi c\u00e1c lo\u1ea1i \u1ed1c v\u00edt m\u1ea1 \u0111i\u1ec7n \u0111\u1ec3 t\u0103ng c\u01b0\u1eddng \u0111\u1ed9 b\u1ec1n l\u00e2u d\u00e0i.<\/p>\n<h3 style=\"font-size: 20px; margin-top: 20px;\">T\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc<\/h3>\n<p style=\"margin-bottom: 20px;\">C\u00e1c \u0111\u1eb7c t\u00ednh c\u01a1 h\u1ecdc x\u00e1c \u0111\u1ecbnh kh\u1ea3 n\u0103ng ho\u1ea1t \u0111\u1ed9ng c\u1ee7a v\u00edt trong c\u00e1c \u0111i\u1ec1u ki\u1ec7n v\u1eadn h\u00e0nh, bao g\u1ed3m khoan, taro v\u00e0 ch\u1ecbu t\u1ea3i.<\/p>\n<h4 style=\"font-size: 18px; margin-top: 15px;\">Hi\u1ec7u su\u1ea5t khoan<\/h4>\n<p style=\"margin-bottom: 20px;\">Ph\u1ea7n khoan c\u1ee7a v\u00edt ph\u1ea3i khoan m\u1ed9t l\u1ed7 \u0111\u01b0\u1ee3c t\u1ea1o s\u1eb5n ph\u00f9 h\u1ee3p \u0111\u1ec3 \u00e9p \u0111\u00f9n c\u00e1c ren trong kh\u1edbp n\u1ed1i theo c\u00e1c \u0111i\u1ec1u ki\u1ec7n th\u1eed nghi\u1ec7m \u0111\u01b0\u1ee3c quy \u0111\u1ecbnh trong m\u1ee5c 4.2.1. \u0110i\u1ec1u n\u00e0y \u0111\u1ea3m b\u1ea3o vi\u1ec7c l\u1eafp \u0111\u1eb7t hi\u1ec7u qu\u1ea3 m\u00e0 kh\u00f4ng c\u1ea7n th\u00eam d\u1ee5ng c\u1ee5.<\/p>\n<h4 style=\"font-size: 18px; margin-top: 15px;\">Hi\u1ec7u su\u1ea5t t\u1ea1o ren<\/h4>\n<p style=\"margin-bottom: 20px;\">Trong l\u1ed7 \u0111\u01b0\u1ee3c khoan s\u1eb5n theo m\u1ee5c 3.3.1, v\u00edt ph\u1ea3i t\u1ea1o ra c\u00e1c ren trong kh\u1edbp m\u00e0 kh\u00f4ng b\u1ecb bi\u1ebfn d\u1ea1ng khi \u0111\u01b0\u1ee3c v\u1eb7n v\u00e0o t\u1ea5m th\u1eed nghi\u1ec7m theo m\u1ee5c 4.2.1.1. \u0110\u1eb7c t\u00ednh n\u00e0y r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o s\u1ef1 c\u1ed1 \u0111\u1ecbnh ch\u1eafc ch\u1eafn trong c\u00e1c v\u1eadt li\u1ec7u m\u1ecfng.<\/p>\n<h4 style=\"font-size: 18px; margin-top: 15px;\">S\u1ee9c b\u1ec1n xo\u1eafn<\/h4>\n<p style=\"margin-bottom: 20px;\">Khi \u0111\u01b0\u1ee3c ki\u1ec3m tra theo m\u1ee5c 4.2.3, \u0111\u1ed9 b\u1ec1n xo\u1eafn ph\u1ea3i \u0111\u1ea3m b\u1ea3o m\u00f4-men xo\u1eafn g\u00e2y g\u00e3y b\u1eb1ng ho\u1eb7c v\u01b0\u1ee3t qu\u00e1 c\u00e1c gi\u00e1 tr\u1ecb trong B\u1ea3ng 4. \u0110\u1ed9 b\u1ec1n xo\u1eafn cao gi\u00fap ng\u0103n ng\u1eeba g\u00e3y v\u1ee1 trong qu\u00e1 tr\u00ecnh si\u1ebft ch\u1eb7t.<\/p>\n<h2 style=\"font-size: 24px; margin-top: 40px;\">Ph\u01b0\u01a1ng ph\u00e1p th\u1eed nghi\u1ec7m<\/h2>\n<p style=\"margin-bottom: 20px;\">C\u00e1c ph\u01b0\u01a1ng ph\u00e1p th\u1eed nghi\u1ec7m ti\u00eau chu\u1ea9n h\u00f3a x\u00e1c minh s\u1ef1 tu\u00e2n th\u1ee7 c\u00e1c y\u00eau c\u1ea7u, cung c\u1ea5p k\u1ebft qu\u1ea3 c\u00f3 th\u1ec3 t\u00e1i l\u1eadp \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng.<\/p>\n<h3 style=\"font-size: 20px; margin-top: 20px;\">C\u00e1c th\u1eed nghi\u1ec7m hi\u1ec7u su\u1ea5t luy\u1ec7n kim<\/h3>\n<h4 style=\"font-size: 18px; margin-top: 15px;\">Ki\u1ec3m tra \u0111\u1ed9 c\u1ee9ng b\u1ec1 m\u1eb7t<\/h4>\n<p style=\"margin-bottom: 20px;\">Ti\u1ebfn h\u00e0nh theo ti\u00eau chu\u1ea9n GB\/T 4340.1. C\u00e1c v\u1ebft l\u00f5m n\u00ean \u0111\u01b0\u1ee3c t\u1ea1o tr\u00ean b\u1ec1 m\u1eb7t ph\u1eb3ng, t\u1ed1t nh\u1ea5t l\u00e0 \u0111\u1ea7u v\u00edt, \u0111\u1ec3 \u0111o ch\u00ednh x\u00e1c l\u1edbp c\u1ee9ng.<\/p>\n<h4 style=\"font-size: 18px; margin-top: 15px;\">Ki\u1ec3m tra \u0111\u1ed9 c\u1ee9ng l\u00f5i<\/h4>\n<p style=\"margin-bottom: 20px;\">Ti\u1ebfn h\u00e0nh theo ti\u00eau chu\u1ea9n GB\/T 4340.1 tr\u00ean m\u1eb7t c\u1eaft ngang \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 \u0111\u1ed9 b\u1ec1n b\u00ean trong.<\/p>\n<h4 style=\"font-size: 18px; margin-top: 15px;\">\u0110o \u0111\u1ed9 s\u00e2u v\u1ecf<\/h4>\n<p style=\"margin-bottom: 20px;\">\u0110o b\u1eb1ng k\u00ednh hi\u1ec3n vi tr\u00ean m\u1eb7t c\u1eaft d\u1ecdc \u1edf s\u01b0\u1eddn gi\u1eefa \u0111\u1ec9nh v\u00e0 ch\u00e2n r\u0103ng, ho\u1eb7c \u1edf ch\u00e2n r\u0103ng \u0111\u1ed1i v\u1edbi v\u00edt \u2264 ST 4.2. \u0110\u1ec3 ph\u00e2n \u0111\u1ecbnh \u0111\u1ed9 c\u1ee9ng, s\u1eed d\u1ee5ng \u0111\u1ed9 c\u1ee9ng micro-Vickers v\u1edbi l\u1ef1c 300 g t\u00e1c \u0111\u1ed9ng l\u00ean bi\u00ean d\u1ea1ng ren, t\u00ednh to\u00e1n t\u1eeb \u0111i\u1ec3m c\u00f3 \u0111\u1ed9 c\u1ee9ng l\u00f5i v\u01b0\u1ee3t qu\u00e1 30 HV.<\/p>\n<h4 style=\"font-size: 18px; margin-top: 15px;\">Ki\u1ec3m tra c\u1ea5u tr\u00fac vi m\u00f4<\/h4>\n<p style=\"margin-bottom: 20px;\">Ti\u1ebfn h\u00e0nh theo c\u00e1c ti\u00eau chu\u1ea9n ki\u1ec3m tra c\u1ea5u tr\u00fac kim lo\u1ea1i c\u00f3 li\u00ean quan \u0111\u1ec3 x\u00e1c nh\u1eadn kh\u00f4ng c\u00f3 khuy\u1ebft t\u1eadt.<\/p>\n<h3 style=\"font-size: 20px; margin-top: 20px;\">Ki\u1ec3m tra hi\u1ec7u su\u1ea5t c\u01a1 h\u1ecdc<\/h3>\n<h4 style=\"font-size: 18px; margin-top: 15px;\">Ki\u1ec3m tra khoan v\u00e0 taro<\/h4>\n<h5 style=\"font-size: 16px; margin-top: 10px;\">Thi\u1ebft b\u1ecb th\u1eed nghi\u1ec7m<\/h5>\n<p style=\"margin-bottom: 20px;\">Tham kh\u1ea3o H\u00ecnh 1 \u0111\u1ec3 bi\u1ebft v\u00ed d\u1ee5 v\u1ec1 c\u00e1ch thi\u1ebft l\u1eadp. C\u00e1c t\u1ea5m th\u1eed nghi\u1ec7m \u0111\u01b0\u1ee3c l\u00e0m t\u1eeb th\u00e9p cacbon th\u1ea5p (\u2264 0,23% cacbon) v\u1edbi \u0111\u1ed9 c\u1ee9ng t\u1eeb 110 HV 30 \u0111\u1ebfn 165 HV 30 theo ti\u00eau chu\u1ea9n GB\/T 4340.1. \u0110\u1ed9 d\u00e0y t\u1ea5m theo B\u1ea3ng 2.<\/p>\n<div class=\"scroll-table\" style=\"overflow-x: auto; margin-bottom: 20px;\">\n<table style=\"width: 100%;\">\n<caption style=\"text-align: center; font-weight: bold; margin-bottom: 10px;\">B\u1ea3ng 2: D\u1eef li\u1ec7u th\u1eed nghi\u1ec7m khoan v\u00e0 taro<\/caption>\n<thead>\n<tr>\n<th>K\u00edch th\u01b0\u1edbc s\u1ee3i<\/th>\n<th>\u0110\u1ed9 d\u00e0y t\u1ea5m th\u1eed nghi\u1ec7m (mm)<\/th>\n<th>L\u1ef1c d\u1ecdc tr\u1ee5c (N)<\/th>\n<th>Th\u1eddi gian v\u1eb7n t\u1ed1i \u0111a (gi\u00e2y)<\/th>\n<th>T\u1ed1c \u0111\u1ed9 tr\u1ee5c v\u00edt (v\u00f2ng\/ph\u00fat)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>ST 2.9<\/td>\n<td>0.7 + 0.7 = 1.4<\/td>\n<td>150<\/td>\n<td>3<\/td>\n<td>1800\u20132500<\/td>\n<\/tr>\n<tr>\n<td>ST 3.5<\/td>\n<td>1 + 1 = 2<\/td>\n<td>150<\/td>\n<td>4<\/td>\n<td>1800\u20132500<\/td>\n<\/tr>\n<tr>\n<td>ST 4.2<\/td>\n<td>1.5 + 1.5 = 3<\/td>\n<td>250<\/td>\n<td>5<\/td>\n<td>1800\u20132500<\/td>\n<\/tr>\n<tr>\n<td>ST 4.8<\/td>\n<td>2 + 2 = 4<\/td>\n<td>250<\/td>\n<td>7<\/td>\n<td>1800\u20132500<\/td>\n<\/tr>\n<tr>\n<td>ST 5.5<\/td>\n<td>2 + 3 = 5<\/td>\n<td>350<\/td>\n<td>11<\/td>\n<td>1000\u20131800<\/td>\n<\/tr>\n<tr>\n<td>ST 6.3<\/td>\n<td>2 + 3 = 5<\/td>\n<td>350<\/td>\n<td>13<\/td>\n<td>1000\u20131800<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p style=\"margin-bottom: 20px;\">\u0110\u1ed9 d\u00e0y t\u1ea5m th\u1eed c\u00f3 th\u1ec3 bao g\u1ed3m hai t\u1ea5m th\u00e9p. C\u00e1c gi\u00e1 tr\u1ecb n\u00e0y ch\u1ec9 d\u00f9ng cho m\u1ee5c \u0111\u00edch ki\u1ec3m tra nghi\u1ec7m thu.<\/p>\n<h5 style=\"font-size: 16px; margin-top: 10px;\">Quy tr\u00ecnh th\u1eed nghi\u1ec7m<\/h5>\n<p style=\"margin-bottom: 20px;\">V\u1eb7n m\u1eabu v\u1eadt c\u00f3 l\u1edbp ph\u1ee7 ho\u1eb7c kh\u00f4ng c\u00f3 l\u1edbp ph\u1ee7 v\u00e0o t\u1ea5m th\u1eed cho \u0111\u1ebfn khi m\u1ed9t ren xuy\u00ean qua ho\u00e0n to\u00e0n. \u00c1p d\u1ee5ng l\u1ef1c d\u1ecdc tr\u1ee5c v\u00e0 t\u1ed1c \u0111\u1ed9 theo B\u1ea3ng 2 trong su\u1ed1t qu\u00e1 tr\u00ecnh khoan v\u00e0 taro.<\/p>\n<h4 style=\"font-size: 18px; margin-top: 15px;\">Ki\u1ec3m tra khoan<\/h4>\n<p style=\"margin-bottom: 20px;\">Theo th\u1ecfa thu\u1eadn, ti\u1ebfn h\u00e0nh ki\u1ec3m tra khoan b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00e1c t\u1ea5m th\u1eed nghi\u1ec7m theo m\u1ee5c 4.2.1.1 v\u1edbi \u0111\u1ed9 d\u00e0y theo B\u1ea3ng 3. \u0110\u00e1nh d\u1ea5u tr\u01b0\u1edbc m\u1ed9t \u0111i\u1ec3m \u0111\u1ecbnh v\u1ecb. Sau khi khoan xuy\u00ean qua, k\u00edch th\u01b0\u1edbc l\u1ed7 t\u1ed1i \u0111a kh\u00f4ng \u0111\u01b0\u1ee3c v\u01b0\u1ee3t qu\u00e1 gi\u1edbi h\u1ea1n c\u1ee7a B\u1ea3ng 3.<\/p>\n<div class=\"scroll-table\" style=\"overflow-x: auto; margin-bottom: 20px;\">\n<table style=\"width: 100%;\">\n<caption style=\"text-align: center; font-weight: bold; margin-bottom: 10px;\">B\u1ea3ng 3: D\u1eef li\u1ec7u th\u1eed nghi\u1ec7m khoan<\/caption>\n<thead>\n<tr>\n<th>K\u00edch th\u01b0\u1edbc s\u1ee3i<\/th>\n<th>\u0110\u1ed9 d\u00e0y t\u1ea5m (mm)<\/th>\n<th>\u0110\u01b0\u1eddng k\u00ednh l\u1ed7 t\u1ed1i thi\u1ec3u (mm)<\/th>\n<th>\u0110\u01b0\u1eddng k\u00ednh l\u1ed7 t\u1ed1i \u0111a (mm)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>ST 2.9<\/td>\n<td>1<\/td>\n<td>2.2<\/td>\n<td>2.5<\/td>\n<\/tr>\n<tr>\n<td>ST 3.5<\/td>\n<td>1<\/td>\n<td>2.7<\/td>\n<td>3<\/td>\n<\/tr>\n<tr>\n<td>ST 4.2<\/td>\n<td>2<\/td>\n<td>3.2<\/td>\n<td>3.6<\/td>\n<\/tr>\n<tr>\n<td>ST 4.8<\/td>\n<td>2<\/td>\n<td>3.7<\/td>\n<td>4.2<\/td>\n<\/tr>\n<tr>\n<td>ST 5.5<\/td>\n<td>2<\/td>\n<td>4.2<\/td>\n<td>4.8<\/td>\n<\/tr>\n<tr>\n<td>ST 6.3<\/td>\n<td>2<\/td>\n<td>4.8<\/td>\n<td>5.4<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p style=\"margin-bottom: 20px;\">B\u1ed9 g\u00e1 trong H\u00ecnh 2 b\u1ed5 sung cho H\u00ecnh 1. \u0110\u01b0\u1eddng k\u00ednh trong c\u1ee7a \u1ed1ng l\u00f3t l\u1edbn h\u01a1n \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i c\u1ee7a ren kho\u1ea3ng 0,25 mm. Chi\u1ec1u d\u00e0i \u1ed1ng l\u00f3t cho ph\u00e9p k\u00e9o d\u00e0i \u0111\u1ea7u m\u0169i khoan. L\u1ef1c d\u1ecdc tr\u1ee5c theo B\u1ea3ng 2 h\u01b0\u1edbng d\u1eabn l\u1eafp \u0111\u1eb7t; v\u01b0\u1ee3t qu\u00e1 l\u1ef1c n\u00e0y c\u00f3 th\u1ec3 g\u00e2y g\u00e3y ho\u1eb7c qu\u00e1 nhi\u1ec7t.<\/p>\n<h4 style=\"font-size: 18px; margin-top: 15px;\">Ki\u1ec3m tra m\u00f4-men xo\u1eafn<\/h4>\n<p style=\"margin-bottom: 20px;\">K\u1eb9p v\u00edt v\u00e0o khu\u00f4n ho\u1eb7c thi\u1ebft b\u1ecb chia ren ph\u00f9 h\u1ee3p m\u00e0 kh\u00f4ng l\u00e0m h\u1ecfng ph\u1ea7n \u0111\u01b0\u1ee3c k\u1eb9p. Tham kh\u1ea3o H\u00ecnh 3 \u0111\u1ec3 bi\u1ebft c\u00e1ch thi\u1ebft l\u1eadp. Sau khi k\u1eb9p, \u00edt nh\u1ea5t hai ren ho\u00e0n ch\u1ec9nh s\u1ebd nh\u00f4 ra v\u00e0 \u00edt nh\u1ea5t hai ren ho\u00e0n ch\u1ec9nh (kh\u00f4ng t\u00ednh \u0111\u1ea7u m\u0169i khoan) \u0111\u01b0\u1ee3c gi\u1eef ch\u1eb7t. \u0110\u1ed1i v\u1edbi v\u00edt ng\u1eafn, k\u1eb9p to\u00e0n b\u1ed9 ren m\u00e0 kh\u00f4ng c\u1ea7n d\u00f9ng l\u1ef1c k\u1eb9p \u0111\u1ea7u v\u00edt.<\/p>\n<p style=\"margin-bottom: 20px;\">D\u00f9ng thi\u1ebft b\u1ecb \u0111\u00e3 hi\u1ec7u chu\u1ea9n \u0111\u1ec3 t\u1ea1o m\u00f4-men xo\u1eafn cho \u0111\u1ebfn khi g\u00e3y. V\u00edt ph\u1ea3i \u0111\u00e1p \u1ee9ng m\u00f4-men xo\u1eafn t\u1ed1i thi\u1ec3u g\u00e2y g\u00e3y trong B\u1ea3ng 4.<\/p>\n<div class=\"scroll-table\" style=\"overflow-x: auto; margin-bottom: 20px;\">\n<table style=\"width: 100%;\">\n<caption style=\"text-align: center; font-weight: bold; margin-bottom: 10px;\">B\u1ea3ng 4: M\u00f4-men xo\u1eafn g\u00e2y h\u1ecfng<\/caption>\n<thead>\n<tr>\n<th>K\u00edch th\u01b0\u1edbc s\u1ee3i<\/th>\n<th>M\u00f4-men xo\u1eafn t\u1ed1i thi\u1ec3u g\u00e2y h\u1ecfng (Nm)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>ST 2.9<\/td>\n<td>1.5<\/td>\n<\/tr>\n<tr>\n<td>ST 3.5<\/td>\n<td>2.8<\/td>\n<\/tr>\n<tr>\n<td>ST 4.2<\/td>\n<td>4.7<\/td>\n<\/tr>\n<tr>\n<td>ST 4.8<\/td>\n<td>6.9<\/td>\n<\/tr>\n<tr>\n<td>ST 5.5<\/td>\n<td>10.4<\/td>\n<\/tr>\n<tr>\n<td>ST 6.3<\/td>\n<td>16.9<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h2 style=\"font-size: 24px; margin-top: 40px;\">C\u1edd l\u00ea l\u1ef1c<\/h2>\n<p style=\"margin-bottom: 20px;\">C\u1edd l\u00ea l\u1ef1c d\u00f9ng \u0111\u1ec3 ki\u1ec3m tra ph\u1ea3i c\u00f3 sai s\u1ed1 \u0111o trong ph\u1ea1m vi \u00b13% so v\u1edbi gi\u00e1 tr\u1ecb m\u00f4-men xo\u1eafn quy \u0111\u1ecbnh. C\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n c\u00f3 \u0111\u1ed9 ch\u00ednh x\u00e1c v\u00e0 hi\u1ec3n th\u1ecb m\u00f4-men xo\u1eafn t\u01b0\u01a1ng \u0111\u01b0\u01a1ng. \u0110\u1ed1i v\u1edbi c\u00e1c th\u1eed nghi\u1ec7m tr\u1ecdng t\u00e0i, h\u00e3y s\u1eed d\u1ee5ng c\u1edd l\u00ea l\u1ef1c c\u1ea7m tay \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 ch\u00ednh x\u00e1c v\u00e0 kh\u1ea3 n\u0103ng t\u00e1i l\u1eadp.<\/p>\n<h2 style=\"font-size: 24px; margin-top: 40px;\">C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n<ol style=\"list-style-type: decimal; margin-bottom: 20px;\">\n<li><strong>Theo ti\u00eau chu\u1ea9n n\u00e0y, nh\u1eefng v\u1eadt li\u1ec7u n\u00e0o \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb s\u1eed d\u1ee5ng cho v\u00edt t\u1ef1 khoan ren?<\/strong><br \/>\nTh\u00e9p t\u00f4i c\u1ee9ng b\u1ec1 m\u1eb7t ho\u1eb7c th\u00e9p x\u1eed l\u00fd nhi\u1ec7t, cung c\u1ea5p \u0111\u1ed9 c\u1ee9ng b\u1ec1 m\u1eb7t c\u1ea7n thi\u1ebft cho vi\u1ec7c khoan v\u00e0 \u0111\u1ed9 d\u1ebbo l\u00f5i \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 b\u1ec1n.<\/li>\n<li><strong>Hi\u1ec7n t\u01b0\u1ee3ng gi\u00f2n hydro trong \u1ed1c v\u00edt m\u1ea1 \u0111i\u1ec7n \u0111\u01b0\u1ee3c x\u1eed l\u00fd nh\u01b0 th\u1ebf n\u00e0o?<\/strong><br \/>\nTh\u00f4ng qua c\u00e1c bi\u1ec7n ph\u00e1p nh\u01b0 nung sau khi m\u1ea1 v\u00e0 ki\u1ec3m tra theo ti\u00eau chu\u1ea9n GB\/T 3098.17, c\u00f9ng v\u1edbi c\u00e1c c\u00e2n nh\u1eafc t\u1eeb ti\u00eau chu\u1ea9n GB\/T 5267.1 \u0111\u1ec3 gi\u1ea3m thi\u1ec3u r\u1ee7i ro g\u00e3y v\u1ee1.<\/li>\n<li><strong>Vi\u1ec7c tr\u00e1nh kho\u1ea3ng nhi\u1ec7t \u0111\u1ed9 t\u00f4i luy\u1ec7n 275\u2013315\u00b0C c\u00f3 \u00fd ngh\u0129a g\u00ec?<\/strong><br \/>\nKho\u1ea3ng nhi\u1ec7t \u0111\u1ed9 n\u00e0y c\u00f3 th\u1ec3 g\u00e2y ra hi\u1ec7n t\u01b0\u1ee3ng gi\u00f2n mactenxit t\u00f4i luy\u1ec7n, d\u1eabn \u0111\u1ebfn g\u00e3y gi\u00f2n; t\u00f4i luy\u1ec7n \u1edf nhi\u1ec7t \u0111\u1ed9 \u2265330\u00b0C \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 d\u1ebbo dai t\u1ed1t h\u01a1n.<\/li>\n<li><strong>N\u00ean ki\u1ec3m tra \u0111\u1ed9 c\u1ee9ng l\u00f5i nh\u01b0 th\u1ebf n\u00e0o \u0111\u1ed1i v\u1edbi c\u00e1c k\u00edch th\u01b0\u1edbc v\u00edt kh\u00e1c nhau?<\/strong><br \/>\nS\u1eed d\u1ee5ng HV 5 cho \u2264 ST 4.2 v\u00e0 HV 10 cho &gt; ST 4.2 tr\u00ean c\u00e1c m\u1eb7t c\u1eaft ngang theo ti\u00eau chu\u1ea9n GB\/T 4340.1 \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 ch\u00ednh x\u00e1c c\u00e1c \u0111\u1eb7c t\u00ednh b\u00ean trong.<\/li>\n<li><strong>C\u00e1c l\u1ef1c d\u1ecdc tr\u1ee5c n\u00e0o \u0111\u01b0\u1ee3c t\u00e1c d\u1ee5ng trong c\u00e1c th\u1eed nghi\u1ec7m khoan, v\u00e0 t\u1ea1i sao?<\/strong><br \/>\nL\u1ef1c t\u00e1c \u0111\u1ed9ng dao \u0111\u1ed9ng t\u1eeb 150 N \u0111\u1ebfn 350 N cho m\u1ed7i k\u00edch th\u01b0\u1edbc ren (B\u1ea3ng 2) \u0111\u1ec3 m\u00f4 ph\u1ecfng \u0111i\u1ec1u ki\u1ec7n l\u1eafp \u0111\u1eb7t, ng\u0103n ng\u1eeba t\u00ecnh tr\u1ea1ng qu\u00e1 t\u1ea3i c\u00f3 th\u1ec3 l\u00e0m h\u1ecfng m\u0169i khoan.<\/li>\n<li><strong>T\u1ea1i sao vi\u1ec7c ki\u1ec3m tra \u0111\u1ed9 b\u1ec1n xo\u1eafn l\u1ea1i quan tr\u1ecdng?<\/strong><br \/>\nVi\u1ec7c n\u00e0y gi\u00fap x\u00e1c minh r\u1eb1ng v\u00edt c\u00f3 th\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c m\u00f4-men xo\u1eafn khi l\u1eafp \u0111\u1eb7t m\u00e0 kh\u00f4ng b\u1ecb g\u00e3y, \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 tin c\u1eady trong c\u00e1c \u1ee9ng d\u1ee5ng c\u00f3 y\u00eau c\u1ea7u si\u1ebft ch\u1eb7t cao theo B\u1ea3ng 4.<\/li>\n<\/ol>\n<div style=\"margin-top: 40px; border-top: 1px solid #ddd; padding-top: 20px; font-size: 14px; color: #666; text-align: center;\"><\/div>\n<p>&nbsp;<\/p>","protected":false},"excerpt":{"rendered":"<p>Outline of the Standard This standard specifies the mechanical properties and test methods for self-drilling tapping screws. Below is a structured outline to guide through the key sections: Technical Requirements: Covers materials, metallurgical properties, and mechanical performance criteria. Test Methods: Details procedures for metallurgical and mechanical testing. Torque Wrench Specifications: Requirements for tools used in [&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-5700","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\/5700","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=5700"}],"version-history":[{"count":1,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/posts\/5700\/revisions"}],"predecessor-version":[{"id":5701,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/posts\/5700\/revisions\/5701"}],"wp:attachment":[{"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/media?parent=5700"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/categories?post=5700"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/tags?post=5700"}],"curies":[{"name":"trang web","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}