{"id":5575,"date":"2025-12-19T09:03:24","date_gmt":"2025-12-19T09:03:24","guid":{"rendered":"https:\/\/korea-transmission.com\/?p=5575"},"modified":"2025-12-19T09:03:24","modified_gmt":"2025-12-19T09:03:24","slug":"mechanical-performance-standards-for-self-drilling-screws-in-fasteners","status":"publish","type":"post","link":"https:\/\/korea-transmission.com\/vi\/blog\/mechanical-performance-standards-for-self-drilling-screws-in-fasteners\/","title":{"rendered":"Ti\u00eau chu\u1ea9n hi\u1ec7u su\u1ea5t c\u01a1 h\u1ecdc cho v\u00edt t\u1ef1 khoan trong c\u00e1c lo\u1ea1i \u1ed1c v\u00edt"},"content":{"rendered":"<div style=\"font-family: Arial, sans-serif; line-height: 1.6; color: #333; max-width: 800px; margin: 0 auto; padding: 20px; background-color: #f9f9f9; border: 1px solid #ddd; border-radius: 5px;\">\n<h1 style=\"text-align: center; color: #0056b3; border-bottom: 2px solid #0056b3; padding-bottom: 10px;\"><\/h1>\n<h2 style=\"color: #0056b3; margin-top: 40px;\">Gi\u1edbi thi\u1ec7u<\/h2>\n<p>B\u00e0i vi\u1ebft n\u00e0y tr\u00ecnh b\u00e0y chi ti\u1ebft c\u00e1c ti\u00eau chu\u1ea9n v\u1ec1 hi\u1ec7u su\u1ea5t c\u01a1 h\u1ecdc cho v\u00edt t\u1ef1 khoan ren nh\u01b0 \u0111\u01b0\u1ee3c n\u00eau trong ti\u00eau chu\u1ea9n GB\/T 3098.11-2002. C\u00e1c ti\u00eau chu\u1ea9n n\u00e0y \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 tin c\u1eady v\u00e0 ch\u1ee9c n\u0103ng c\u1ee7a v\u00edt t\u1ef1 khoan trong c\u00e1c \u1ee9ng d\u1ee5ng l\u1eafp gh\u00e9p, bao g\u1ed3m v\u1eadt li\u1ec7u, t\u00ednh ch\u1ea5t luy\u1ec7n kim v\u00e0 hi\u1ec7u su\u1ea5t c\u01a1 h\u1ecdc. V\u00edt t\u1ef1 khoan \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 t\u1ef1 khoan l\u1ed7 v\u00e0 t\u1ea1o ren m\u00e0 kh\u00f4ng c\u1ea7n khoan tr\u01b0\u1edbc, do \u0111\u00f3 ch\u00fang r\u1ea5t c\u1ea7n thi\u1ebft trong ng\u00e0nh x\u00e2y d\u1ef1ng, \u00f4 t\u00f4 v\u00e0 s\u1ea3n xu\u1ea5t.<\/p>\n<h2 style=\"color: #0056b3; margin-top: 40px;\">Y\u00eau c\u1ea7u k\u1ef9 thu\u1eadt<\/h2>\n<h3 style=\"color: #333; margin-top: 20px;\">1.1 V\u1eadt li\u1ec7u<\/h3>\n<p>V\u00edt t\u1ef1 khoan ren ph\u1ea3i \u0111\u01b0\u1ee3c ch\u1ebf t\u1ea1o t\u1eeb th\u00e9p th\u1ea5m cacbon ho\u1eb7c th\u00e9p x\u1eed l\u00fd nhi\u1ec7t \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c \u0111\u1ed9 c\u1ee9ng v\u00e0 \u0111\u1ed9 b\u1ec1n c\u1ea7n thi\u1ebft cho c\u00e1c thao t\u00e1c khoan v\u00e0 ren.<\/p>\n<h3 style=\"color: #333; margin-top: 20px;\">1.2 T\u00ednh ch\u1ea5t luy\u1ec7n kim<\/h3>\n<h4 style=\"color: #555; margin-top: 10px;\">1.2.1 \u0110\u1ed9 c\u1ee9ng b\u1ec1 m\u1eb7t<\/h4>\n<p>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 HV0.3.<\/p>\n<h4 style=\"color: #555; margin-top: 10px;\">1.2.2 \u0110\u1ed9 c\u1ee9ng l\u00f5i<\/h4>\n<p>\u0110\u1ed9 c\u1ee9ng l\u00f5i sau khi x\u1eed l\u00fd s\u1ebd l\u00e0:<\/p>\n<ul style=\"list-style-type: disc; margin-left: 20px;\">\n<li>T\u1eeb 320 HV5 \u0111\u1ebfn 400 HV5 cho c\u00e1c k\u00edch th\u01b0\u1edbc ren \u2264 ST4.2;<\/li>\n<li>T\u1eeb 320 HV10 \u0111\u1ebfn 400 HV10 cho c\u00e1c k\u00edch th\u01b0\u1edbc ren &gt; ST4.2.<\/li>\n<\/ul>\n<p>Nhi\u1ec7t \u0111\u1ed9 t\u00f4i t\u1ed1i thi\u1ec3u \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb l\u00e0 330\u00b0C. N\u00ean tr\u00e1nh nhi\u1ec7t \u0111\u1ed9 t\u00f4i t\u1eeb 275\u00b0C \u0111\u1ebfn 315\u00b0C \u0111\u1ec3 gi\u1ea3m thi\u1ec3u nguy c\u01a1 gi\u00f2n do mactenxit t\u00f4i.<\/p>\n<h4 style=\"color: #555; margin-top: 10px;\">1.2.3 \u0110\u1ed9 s\u00e2u l\u1edbp cacbon h\u00f3a<\/h4>\n<p>\u0110\u1ed9 d\u00e0y c\u1ee7a l\u1edbp th\u1ea5m cacbon ph\u1ea3i tu\u00e2n th\u1ee7 c\u00e1c gi\u00e1 tr\u1ecb trong B\u1ea3ng 1.<\/p>\n<table style=\"width: 100%; border-collapse: collapse; margin: 20px 0; text-align: center; border: 1px solid #ccc;\">\n<caption style=\"font-weight: bold; margin-bottom: 10px;\">B\u1ea3ng 1: \u0110\u1ed9 d\u00e0y l\u1edbp th\u1ea5m cacbon (mm)<\/caption>\n<thead>\n<tr style=\"background-color: #e9ecef; border-bottom: 1px solid #ccc;\">\n<th style=\"padding: 8px; border: 1px solid #ccc;\">K\u00edch th\u01b0\u1edbc s\u1ee3i<\/th>\n<th style=\"padding: 8px; border: 1px solid #ccc;\">T\u1ed1i thi\u1ec3u<\/th>\n<th style=\"padding: 8px; border: 1px solid #ccc;\">T\u1ed1i \u0111a<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">ST2.9 v\u00e0 ST3.5<\/td>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">0.05<\/td>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">0.18<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">ST4.2 \u0111\u1ebfn ST5.5<\/td>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">0.10<\/td>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">0.23<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">ST6.3<\/td>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">0.15<\/td>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">0.28<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h4 style=\"color: #555; margin-top: 10px;\">1.2.4 C\u1ea5u tr\u00fac vi m\u00f4<\/h4>\n<p>Trong c\u1ea5u tr\u00fac vi m\u00f4 sau khi x\u1eed l\u00fd nhi\u1ec7t, kh\u00f4ng \u0111\u01b0\u1ee3c xu\u1ea5t hi\u1ec7n ferit d\u1ea1ng d\u1ea3i gi\u1eefa l\u1edbp c\u1ee9ng b\u1ec1 m\u1eb7t v\u00e0 l\u00f5i.<\/p>\n<h4 style=\"color: #555; margin-top: 10px;\">1.2.5 Hi\u1ec7n t\u01b0\u1ee3ng gi\u00f2n do hydro<\/h4>\n<p>\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. Nh\u00e0 s\u1ea3n xu\u1ea5t v\u00e0\/ho\u1eb7c \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 nguy c\u01a1 n\u00e0y. C\u00e1c y\u00eau c\u1ea7u v\u1ec1 lo\u1ea1i b\u1ecf hi\u1ec7n t\u01b0\u1ee3ng gi\u00f2n hydro trong c\u00e1c chi ti\u1ebft l\u1eafp gh\u00e9p m\u1ea1 \u0111i\u1ec7n theo ti\u00eau chu\u1ea9n GB\/T 5267.1 c\u0169ng c\u1ea7n \u0111\u01b0\u1ee3c xem x\u00e9t.<\/p>\n<h3 style=\"color: #333; margin-top: 20px;\">1.3 T\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc<\/h3>\n<h4 style=\"color: #555; margin-top: 10px;\">1.3.1 Hi\u1ec7u su\u1ea5t khoan<\/h4>\n<p>Ph\u1ea7n khoan c\u1ee7a v\u00edt ph\u1ea3i khoan m\u1ed9t l\u1ed7 \u0111\u01b0\u1ee3c ch\u1ebf t\u1ea1o s\u1eb5n ph\u00f9 h\u1ee3p \u0111\u1ec3 \u00e9p \u0111\u00f9n c\u00e1c ren trong kh\u1edbp v\u1edbi nhau theo c\u00e1c \u0111i\u1ec1u ki\u1ec7n th\u1eed nghi\u1ec7m \u0111\u01b0\u1ee3c quy \u0111\u1ecbnh trong m\u1ee5c 2.2.1.<\/p>\n<h4 style=\"color: #555; margin-top: 10px;\">1.3.2 Hi\u1ec7u su\u1ea5t t\u1ea1o ren<\/h4>\n<p>Trong l\u1ed7 khoan s\u1eb5n theo m\u1ee5c 2.2.1, v\u00edt t\u1ef1 khoan 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 quy \u0111\u1ecbnh t\u1ea1i m\u1ee5c 2.2.1.1.<\/p>\n<h4 style=\"color: #555; margin-top: 10px;\">1.3.3 \u0110\u1ed9 b\u1ec1n xo\u1eafn<\/h4>\n<p>Khi \u0111\u01b0\u1ee3c ki\u1ec3m tra theo m\u1ee5c 2.2.3, \u0111\u1ed9 b\u1ec1n xo\u1eafn ph\u1ea3i \u0111\u1ea3m b\u1ea3o m\u00f4men xo\u1eafn g\u00e2y h\u1ecfng b\u1eb1ng ho\u1eb7c l\u1edbn h\u01a1n c\u00e1c gi\u00e1 tr\u1ecb trong B\u1ea3ng 4.<\/p>\n<h2 style=\"color: #0056b3; margin-top: 40px;\">Ph\u01b0\u01a1ng ph\u00e1p th\u1eed nghi\u1ec7m<\/h2>\n<h3 style=\"color: #333; margin-top: 20px;\">2.1 Th\u1eed nghi\u1ec7m t\u00ednh ch\u1ea5t luy\u1ec7n kim<\/h3>\n<h4 style=\"color: #555; margin-top: 10px;\">2.1.1 Th\u1eed nghi\u1ec7m \u0111\u1ed9 c\u1ee9ng b\u1ec1 m\u1eb7t<\/h4>\n<p>Vi\u1ec7c ki\u1ec3m tra \u0111\u1ed9 c\u1ee9ng b\u1ec1 m\u1eb7t ph\u1ea3i \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n 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 tr\u00ean \u0111\u1ea7u v\u00edt.<\/p>\n<h4 style=\"color: #555; margin-top: 10px;\">2.1.2 Ki\u1ec3m tra \u0111\u1ed9 c\u1ee9ng l\u00f5i<\/h4>\n<p>Vi\u1ec7c ki\u1ec3m tra \u0111\u1ed9 c\u1ee9ng l\u00f5i ph\u1ea3i \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n theo ti\u00eau chu\u1ea9n GB\/T 4340.1 tr\u00ean m\u1eb7t c\u1eaft ngang.<\/p>\n<h4 style=\"color: #555; margin-top: 10px;\">2.1.3 \u0110o \u0111\u1ed9 s\u00e2u l\u1edbp th\u1ea5m cacbon<\/h4>\n<p>\u0110\u1ed9 s\u00e2u l\u1edbp th\u1ea5m cacbon s\u1ebd \u0111\u01b0\u1ee3c \u0111o b\u1eb1ng k\u00ednh hi\u1ec3n vi tr\u00ean m\u1eb7t c\u1eaft d\u1ecdc \u1edf m\u1eb7t b\u00ean, n\u1eb1m gi\u1eefa \u0111\u1ec9nh v\u00e0 ch\u00e2n ren, ho\u1eb7c \u1edf ch\u00e2n ren \u0111\u1ed1i v\u1edbi c\u00e1c v\u00edt c\u00f3 k\u00edch th\u01b0\u1edbc \u2264 ST4.2. \u0110\u1ec3 ph\u00e2n \u0111\u1ecbnh th\u1eafng thua, h\u00e3y s\u1eed d\u1ee5ng \u0111\u1ed9 c\u1ee9ng micro-Vickers v\u1edbi l\u1ef1c th\u1eed 300 g tr\u00ean bi\u00ean d\u1ea1ng ren, t\u00ednh \u0111\u1ed9 s\u00e2u t\u1eeb \u0111i\u1ec3m c\u00f3 \u0111\u1ed9 c\u1ee9ng l\u00f5i v\u01b0\u1ee3t qu\u00e1 30 HV.<\/p>\n<h4 style=\"color: #555; margin-top: 10px;\">2.1.4 Th\u1eed nghi\u1ec7m c\u1ea5u tr\u00fac vi m\u00f4<\/h4>\n<p>Vi\u1ec7c ki\u1ec3m tra c\u1ea5u tr\u00fac vi m\u00f4 ph\u1ea3i tu\u00e2n theo c\u00e1c ti\u00eau chu\u1ea9n ki\u1ec3m tra luy\u1ec7n kim c\u00f3 li\u00ean quan.<\/p>\n<h3 style=\"color: #333; margin-top: 20px;\">2.2 Th\u1eed nghi\u1ec7m t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc<\/h3>\n<h4 style=\"color: #555; margin-top: 10px;\">2.2.1 Th\u1eed nghi\u1ec7m khoan v\u00e0 taro<\/h4>\n<h5 style=\"color: #666; margin-top: 5px;\">2.2.1.1 Thi\u1ebft b\u1ecb th\u1eed nghi\u1ec7m<\/h5>\n<p>T\u1ea5m th\u1eed nghi\u1ec7m ph\u1ea3i \u0111\u01b0\u1ee3c l\u00e0m b\u1eb1ng th\u00e9p cacbon th\u1ea5p v\u1edbi h\u00e0m l\u01b0\u1ee3ng cacbon \u2264 0,23% v\u00e0 \u0111\u1ed9 c\u1ee9ng t\u1eeb 110 HV30 \u0111\u1ebfn 165 HV30 (theo ti\u00eau chu\u1ea9n GB\/T 4340.1). \u0110\u1ed9 d\u00e0y t\u1ea5m ph\u1ea3i tu\u00e2n th\u1ee7 B\u1ea3ng 2. Thi\u1ebft b\u1ecb th\u1eed nghi\u1ec7m \u0111\u01b0\u1ee3c minh h\u1ecda trong H\u00ecnh 1 (kh\u00f4ng hi\u1ec3n th\u1ecb \u1edf \u0111\u00e2y; xem ti\u00eau chu\u1ea9n \u0111\u1ec3 bi\u1ebft s\u01a1 \u0111\u1ed3).<\/p>\n<table style=\"width: 100%; border-collapse: collapse; margin: 20px 0; text-align: center; border: 1px solid #ccc;\">\n<caption style=\"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 style=\"background-color: #e9ecef; border-bottom: 1px solid #ccc;\">\n<th style=\"padding: 8px; border: 1px solid #ccc;\">K\u00edch th\u01b0\u1edbc s\u1ee3i<\/th>\n<th style=\"padding: 8px; border: 1px solid #ccc;\">\u0110\u1ed9 d\u00e0y t\u1ea5m th\u1eed nghi\u1ec7m (mm)<\/th>\n<th style=\"padding: 8px; border: 1px solid #ccc;\">L\u1ef1c d\u1ecdc tr\u1ee5c (N)<\/th>\n<th style=\"padding: 8px; border: 1px solid #ccc;\">Th\u1eddi gian v\u1eb7n t\u1ed1i \u0111a (gi\u00e2y)<\/th>\n<th style=\"padding: 8px; border: 1px solid #ccc;\">T\u1ed1c \u0111\u1ed9 quay c\u1ee7a v\u00edt khi c\u00f3 t\u1ea3i (v\u00f2ng\/ph\u00fat)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">ST2.9<\/td>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">0.7 + 0.7 = 1.4<\/td>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">150<\/td>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">3<\/td>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">1800\u20132500<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">ST3.5<\/td>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">1 + 1 = 2<\/td>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">150<\/td>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">4<\/td>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">1800\u20132500<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">ST4.2<\/td>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">1.5 + 1.5 = 3<\/td>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">250<\/td>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">5<\/td>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">1800\u20132500<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">ST4.8<\/td>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">2 + 2 = 4<\/td>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">250<\/td>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">7<\/td>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">1800\u20132500<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">ST5.5<\/td>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">2 + 3 = 5<\/td>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">350<\/td>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">11<\/td>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">1000\u20131800<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">ST6.3<\/td>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">2 + 3 = 5<\/td>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">350<\/td>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">13<\/td>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">1000\u20131800<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>L\u01b0u \u00fd: \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=\"color: #666; margin-top: 5px;\">2.2.1.2 Quy tr\u00ecnh ki\u1ec3m tra<\/h5>\n<p>V\u1eb7n v\u00edt c\u00f3 l\u1edbp ph\u1ee7 ho\u1eb7c kh\u00f4ng c\u00f3 l\u1edbp ph\u1ee7 (t\u00f9y theo \u1ee9ng d\u1ee5ng) v\u00e0o t\u1ea5m th\u1eed nghi\u1ec7m cho \u0111\u1ebfn khi m\u1ed9t ren xuy\u00ean qua ho\u00e0n to\u00e0n. L\u1ef1c d\u1ecdc tr\u1ee5c v\u00e0 t\u1ed1c \u0111\u1ed9 v\u1eb7n v\u00edt t\u1eeb B\u1ea3ng 2 \u00e1p d\u1ee5ng cho c\u1ea3 qu\u00e1 tr\u00ecnh khoan v\u00e0 taro.<\/p>\n<h4 style=\"color: #555; margin-top: 10px;\">2.2.2 Ki\u1ec3m tra khoan<\/h4>\n<p>Theo th\u1ecfa thu\u1eadn, vi\u1ec7c ki\u1ec3m tra khoan c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n. T\u1ea5m th\u1eed theo m\u1ee5c 2.2.1.1, \u0111\u1ed9 d\u00e0y theo B\u1ea3ng 3. \u0110\u1ee5c 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. B\u1ed9 g\u00e1 trong H\u00ecnh 2 (kh\u00f4ng \u0111\u01b0\u1ee3c hi\u1ec3n th\u1ecb; tham kh\u1ea3o ti\u00eau chu\u1ea9n) b\u1ed5 sung cho H\u00ecnh 1, v\u1edbi \u0111\u01b0\u1eddng k\u00ednh trong c\u1ee7a \u1ed1ng b\u1ecdc l\u1edbn h\u01a1n \u0111\u01b0\u1eddng k\u00ednh ngo\u00e0i c\u1ee7a ren kho\u1ea3ng 0,25 mm. Chi\u1ec1u d\u00e0i c\u1ee7a \u1ed1ng b\u1ecdc cho ph\u00e9p m\u0169i khoan k\u00e9o d\u00e0i. L\u1ef1c d\u1ecdc tr\u1ee5c t\u1eeb B\u1ea3ng 2 h\u01b0\u1edbng d\u1eabn vi\u1ec7c l\u1eafp \u0111\u1eb7t; v\u01b0\u1ee3t qu\u00e1 gi\u1edbi h\u1ea1n n\u00e0y c\u00f3 th\u1ec3 g\u00e2y g\u00e3y m\u0169i khoan ho\u1eb7c qu\u00e1 nhi\u1ec7t.<\/p>\n<table style=\"width: 100%; border-collapse: collapse; margin: 20px 0; text-align: center; border: 1px solid #ccc;\">\n<caption style=\"font-weight: bold; margin-bottom: 10px;\">B\u1ea3ng 3: D\u1eef li\u1ec7u th\u1eed nghi\u1ec7m khoan (mm)<\/caption>\n<thead>\n<tr style=\"background-color: #e9ecef; border-bottom: 1px solid #ccc;\">\n<th style=\"padding: 8px; border: 1px solid #ccc;\">K\u00edch th\u01b0\u1edbc s\u1ee3i<\/th>\n<th style=\"padding: 8px; border: 1px solid #ccc;\">\u0110\u1ed9 d\u00e0y t\u1ea5m<\/th>\n<th style=\"padding: 8px; border: 1px solid #ccc;\">\u0110\u01b0\u1eddng k\u00ednh l\u1ed7 t\u1ed1i thi\u1ec3u<\/th>\n<th style=\"padding: 8px; border: 1px solid #ccc;\">\u0110\u01b0\u1eddng k\u00ednh l\u1ed7 t\u1ed1i \u0111a<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">ST2.9<\/td>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">1<\/td>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">2.2<\/td>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">2.5<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">ST3.5<\/td>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">1<\/td>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">2.7<\/td>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">3<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">ST4.2<\/td>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">2<\/td>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">3.2<\/td>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">3.6<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">ST4.8<\/td>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">2<\/td>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">3.7<\/td>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">4.2<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">ST5.5<\/td>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">2<\/td>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">4.2<\/td>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">4.8<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">ST6.3<\/td>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">2<\/td>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">4.8<\/td>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">5.4<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h4 style=\"color: #555; margin-top: 10px;\">2.2.3 Ki\u1ec3m tra momen xo\u1eafn<\/h4>\n<p>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. Thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c minh h\u1ecda trong H\u00ecnh 3 (kh\u00f4ng hi\u1ec3n th\u1ecb; tham kh\u1ea3o ti\u00eau chu\u1ea9n). Sau khi k\u1eb9p, \u00edt nh\u1ea5t hai ren ho\u00e0n ch\u1ec9nh ph\u1ea3i nh\u00f4 ra kh\u1ecfi thi\u1ebft b\u1ecb, v\u00e0 \u00edt nh\u1ea5t hai ren ho\u00e0n ch\u1ec9nh (kh\u00f4ng bao g\u1ed3m \u0111\u1ea7u m\u0169i khoan) ph\u1ea3i \u0111\u01b0\u1ee3c k\u1eb9p ch\u1eafc ch\u1eafn. \u0110\u1ed1i v\u1edbi v\u00edt ng\u1eafn, k\u1eb9p to\u00e0n b\u1ed9 ren m\u00e0 kh\u00f4ng t\u00e1c d\u1ee5ng l\u1ef1c l\u00ean \u0111\u1ea7u v\u00edt. S\u1eed d\u1ee5ng 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 ph\u00e1 h\u1ee7y trong B\u1ea3ng 4 (\u0111\u01a1n v\u1ecb: N\u00b7m).<\/p>\n<table style=\"width: 100%; border-collapse: collapse; margin: 20px 0; text-align: center; border: 1px solid #ccc;\">\n<caption style=\"font-weight: bold; margin-bottom: 10px;\">B\u1ea3ng 4: M\u00f4-men xo\u1eafn g\u00e2y h\u1ecfng (N\u00b7m)<\/caption>\n<thead>\n<tr style=\"background-color: #e9ecef; border-bottom: 1px solid #ccc;\">\n<th style=\"padding: 8px; border: 1px solid #ccc;\">K\u00edch th\u01b0\u1edbc s\u1ee3i<\/th>\n<th style=\"padding: 8px; border: 1px solid #ccc;\">T\u1ed1i thi\u1ec3u<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">ST2.9<\/td>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">1.5<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">ST3.5<\/td>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">2.8<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">ST4.2<\/td>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">4.7<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">ST4.8<\/td>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">6.9<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">ST5.5<\/td>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">10.4<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">ST6.3<\/td>\n<td style=\"padding: 8px; border: 1px solid #ccc;\">16.9<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u0110\u1ed1i v\u1edbi th\u1eed nghi\u1ec7m momen xo\u1eafn, sai s\u1ed1 \u0111o c\u1ee7a c\u1edd l\u00ea momen xo\u1eafn ph\u1ea3i n\u1eb1m trong kho\u1ea3ng \u00b13% so v\u1edbi gi\u00e1 tr\u1ecb quy \u0111\u1ecbnh. C\u00f3 th\u1ec3 s\u1eed d\u1ee5ng thi\u1ebft b\u1ecb \u0111i\u1ec7n c\u00f3 \u0111\u1ed9 ch\u00ednh x\u00e1c t\u01b0\u01a1ng \u0111\u01b0\u01a1ng. \u0110\u1ec3 ph\u00e2n x\u1eed, h\u00e3y s\u1eed d\u1ee5ng c\u1edd l\u00ea momen xo\u1eafn c\u1ea7m tay.<\/p>\n<h2 style=\"color: #0056b3; margin-top: 40px;\">C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n<dl style=\"margin-left: 20px;\">\n<dt style=\"font-weight: bold; margin-top: 10px;\">Nh\u1eefng v\u1eadt li\u1ec7u n\u00e0o c\u1ea7n thi\u1ebft cho v\u00edt t\u1ef1 khoan ren theo ti\u00eau chu\u1ea9n GB\/T 3098.11-2002?<\/dt>\n<dd>Ch\u00fang ph\u1ea3i \u0111\u01b0\u1ee3c l\u00e0m t\u1eeb th\u00e9p th\u1ea5m cacbon ho\u1eb7c th\u00e9p x\u1eed l\u00fd nhi\u1ec7t \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c \u0111\u1ed9 c\u1ee9ng v\u00e0 hi\u1ec7u n\u0103ng theo y\u00eau c\u1ea7u.<\/dd>\n<dt style=\"font-weight: bold; margin-top: 10px;\">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?<\/dt>\n<dd>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 th\u1eed nghi\u1ec7m theo ti\u00eau chu\u1ea9n GB\/T 3098.17 v\u00e0 xem x\u00e9t ti\u00eau chu\u1ea9n GB\/T 5267.1 v\u1ec1 lo\u1ea1i b\u1ecf hydro, \u0111\u1ec3 ng\u0103n ng\u1eeba nguy c\u01a1 n\u1ee9t v\u1ee1.<\/dd>\n<dt style=\"font-weight: bold; margin-top: 10px;\">\u0110\u1ed9 c\u1ee9ng b\u1ec1 m\u1eb7t t\u1ed1i thi\u1ec3u c\u1ee7a c\u00e1c \u1ed1c v\u00edt n\u00e0y l\u00e0 bao nhi\u00eau?<\/dt>\n<dd>\u0110\u1ed9 c\u1ee9ng b\u1ec1 m\u1eb7t ph\u1ea3i \u0111\u1ea1t \u00edt nh\u1ea5t 530 HV0.3 sau khi x\u1eed l\u00fd nhi\u1ec7t.<\/dd>\n<dt style=\"font-weight: bold; margin-top: 10px;\">T\u1ea1i sao c\u1ea7n tr\u00e1nh m\u1ed9t s\u1ed1 nhi\u1ec7t \u0111\u1ed9 t\u00f4i luy\u1ec7n nh\u1ea5t \u0111\u1ecbnh?<\/dt>\n<dd>T\u00f4i luy\u1ec7n \u1edf nhi\u1ec7t \u0111\u1ed9 t\u1eeb 275\u00b0C \u0111\u1ebfn 315\u00b0C l\u00e0m t\u0103ng nguy c\u01a1 gi\u00f2n mactenxit \u0111\u00e3 t\u00f4i luy\u1ec7n; nhi\u1ec7t \u0111\u1ed9 t\u1ed1i thi\u1ec3u 330\u00b0C \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb.<\/dd>\n<dt style=\"font-weight: bold; margin-top: 10px;\">C\u00e1c y\u00eau c\u1ea7u v\u1ec1 \u0111\u1ed9 b\u1ec1n xo\u1eafn \u0111\u1ed1i v\u1edbi v\u00edt ST4.8 l\u00e0 g\u00ec?<\/dt>\n<dd>M\u00f4men xo\u1eafn g\u00e2y h\u1ecfng t\u1ed1i thi\u1ec3u l\u00e0 6,9 N\u00b7m khi th\u1eed nghi\u1ec7m theo ph\u01b0\u01a1ng ph\u00e1p quy \u0111\u1ecbnh.<\/dd>\n<dt style=\"font-weight: bold; margin-top: 10px;\">\u0110\u1ed9 s\u00e2u l\u1edbp th\u1ea5m cacbon \u0111\u01b0\u1ee3c \u0111o nh\u01b0 th\u1ebf n\u00e0o \u0111\u1ec3 ph\u1ee5c v\u1ee5 cho vi\u1ec7c ph\u00e2n x\u1eed tranh ch\u1ea5p?<\/dt>\n<dd>S\u1eed d\u1ee5ng th\u01b0\u1edbc \u0111o \u0111\u1ed9 c\u1ee9ng micro-Vickers v\u1edbi l\u1ef1c 300 g t\u00e1c \u0111\u1ed9ng l\u00ean b\u1ec1 m\u1eb7t ren, b\u1eaft \u0111\u1ea7u t\u1eeb \u0111i\u1ec3m m\u00e0 \u0111\u1ed9 c\u1ee9ng v\u01b0\u1ee3t qu\u00e1 l\u00f5i 30 HV.<\/dd>\n<\/dl>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Introduction This article details the mechanical performance standards for self-drilling tapping screws as outlined in GB\/T 3098.11-2002. These standards ensure the reliability and functionality of self-drilling screws in fastening applications, covering materials, metallurgical properties, and mechanical performance. Self-drilling screws are designed to drill their own hole and form mating threads without pre-drilling, making them essential [&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-5575","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\/5575","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=5575"}],"version-history":[{"count":2,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/posts\/5575\/revisions"}],"predecessor-version":[{"id":5577,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/posts\/5575\/revisions\/5577"}],"wp:attachment":[{"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/media?parent=5575"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/categories?post=5575"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/tags?post=5575"}],"curies":[{"name":"trang web","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}