{"id":6831,"date":"2020-12-10T19:01:48","date_gmt":"2020-12-10T11:01:48","guid":{"rendered":"https:\/\/xzfastener.com\/?p=6831"},"modified":"2026-06-23T09:08:21","modified_gmt":"2026-06-23T01:08:21","slug":"how-heat-treatment-improves-fastener-strength-and-hardness-3","status":"publish","type":"post","link":"https:\/\/xzfastener.com\/vi\/how-heat-treatment-improves-fastener-strength-and-hardness-3\/","title":{"rendered":"C\u00e1ch x\u1eed l\u00fd nhi\u1ec7t c\u1ea3i thi\u1ec7n \u0111\u1ed9 b\u1ec1n v\u00e0 \u0111\u1ed9 c\u1ee9ng c\u1ee7a chi ti\u1ebft si\u1ebft ch\u1eb7t"},"content":{"rendered":"<p>X\u1eed l\u00fd nhi\u1ec7t l\u00e0 n\u01a1i nhi\u1ec1u \u1ed1c v\u00edt c\u00f3 \u0111\u1ed9 b\u1ec1n cao c\u00f3 \u0111\u01b0\u1ee3c hi\u1ec7u su\u1ea5t th\u1ef1c s\u1ef1 c\u1ee7a ch\u00fang. Bu l\u00f4ng c\u00f3 th\u1ec3 \u0111\u00e3 c\u00f3 h\u00ecnh d\u1ea1ng ch\u00ednh x\u00e1c sau khi c\u00e1n ngu\u1ed9i v\u00e0 c\u00e1n ren, nh\u01b0ng n\u1ebfu kh\u00f4ng x\u1eed l\u00fd nhi\u1ec7t th\u00edch h\u1ee3p, n\u00f3 c\u00f3 th\u1ec3 kh\u00f4ng \u0111\u1ea1t \u0111\u01b0\u1ee3c \u0111\u1ed9 b\u1ec1n ho\u1eb7c \u0111\u1ed9 c\u1ee9ng c\u1ea7n thi\u1ebft.<\/p>\n\n\n\n<p>\u0110\u1ed1i v\u1edbi ng\u01b0\u1eddi mua, \u0111i\u1ec3m ch\u00ednh l\u00e0 th\u1ef1c t\u1ebf: kh\u00f4ng ch\u1ec9 \u0111\u00e1nh gi\u00e1 chi ti\u1ebft si\u1ebft ch\u1eb7t b\u1eb1ng v\u1ebb b\u1ec1 ngo\u00e0i ho\u1eb7c d\u1ea5u hi\u1ec7u tr\u00ean \u0111\u1ea7u. \u0110\u1ed9 b\u1ec1n ph\u1ea3i \u0111\u1ebfn t\u1eeb v\u1eadt li\u1ec7u \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t, x\u1eed l\u00fd nhi\u1ec7t c\u00f3 ki\u1ec3m so\u00e1t v\u00e0 k\u1ebft qu\u1ea3 th\u1eed nghi\u1ec7m \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e1c minh.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">T\u1ea1i sao x\u1eed l\u00fd nhi\u1ec7t l\u1ea1i quan tr\u1ecdng<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">S\u1ee9c m\u1ea1nh \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng v\u00e0o th\u00e9p<\/h3>\n\n\n\n<p>C\u00e1c \u1ed1c v\u00edt b\u1eb1ng th\u00e9p cacbon v\u00e0 th\u00e9p h\u1ee3p kim th\u01b0\u1eddng c\u1ea7n x\u1eed l\u00fd nhi\u1ec7t khi \u0111\u01a1n h\u00e0ng y\u00eau c\u1ea7u c\u00e1c lo\u1ea1i thu\u1ed9c t\u00ednh cao h\u01a1n, ch\u1eb3ng h\u1ea1n nh\u01b0 8.8, 10.9, ho\u1eb7c 12.9. Qu\u00e1 tr\u00ecnh n\u00e0y thay \u0111\u1ed5i k\u1ebft c\u1ea5u th\u00e9p \u0111\u1ec3 chi ti\u1ebft si\u1ebft ch\u1eb7t c\u00f3 th\u1ec3 ch\u1ed1ng gi\u00e3n, bi\u1ebfn d\u1ea1ng v\u00e0 m\u00e0i m\u00f2n khi ch\u1ecbu t\u1ea3i.<\/p>\n\n\n\n<p>\u0110i\u1ec1u n\u00e0y \u0111\u1eb7c bi\u1ec7t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi m\u00e1y m\u00f3c, thi\u1ebft b\u1ecb x\u00e2y d\u1ef1ng, k\u1ebft c\u1ea5u th\u00e9p, ph\u1ee5 t\u00f9ng \u00f4 t\u00f4 v\u00e0 c\u00e1c c\u1ee5m l\u1eafp r\u00e1p h\u1ea1ng n\u1eb7ng.<\/p>\n\n\n\n<p>\u0110\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng t\u1ea3i cao, ng\u01b0\u1eddi mua n\u00ean xem x\u00e9t <a href=\"https:\/\/xzfastener.com\/vi\/products-category\/high-strength-fasteners\/\">\u1ed1c v\u00edt c\u01b0\u1eddng \u0111\u1ed9 cao<\/a> tr\u01b0\u1edbc khi x\u00e1c nh\u1eadn y\u00eau c\u1ea7u c\u1ea5p v\u00e0 ki\u1ec3m tra.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">C\u00e1c b\u01b0\u1edbc x\u1eed l\u00fd nhi\u1ec7t ch\u00ednh<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">L\u00e0m ngu\u1ed9i v\u00e0 \u1ee7<\/h3>\n\n\n\n<p>H\u1ea7u h\u1ebft c\u00e1c bu l\u00f4ng, \u1ed1c v\u00edt v\u00e0 \u0111inh t\u00e1n c\u00f3 \u0111\u1ed9 b\u1ec1n cao \u0111\u1ec1u \u0111\u01b0\u1ee3c x\u1eed l\u00fd nhi\u1ec7t th\u00f4ng qua qu\u00e1 tr\u00ecnh t\u00f4i v\u00e0 t\u00f4i.<\/p>\n\n\n\n<p>L\u00e0m ngu\u1ed9i l\u00e0m t\u0103ng \u0111\u1ed9 c\u1ee9ng. Qu\u00e1 tr\u00ecnh \u1ee7 l\u00e0m gi\u1ea3m \u0111\u1ed9 gi\u00f2n qu\u00e1 m\u1ee9c v\u00e0 gi\u00fap chi ti\u1ebft si\u1ebft ch\u1eb7t \u0111\u1ea1t \u0111\u01b0\u1ee3c s\u1ef1 c\u00e2n b\u1eb1ng c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng \u0111\u01b0\u1ee3c v\u1ec1 \u0111\u1ed9 b\u1ec1n v\u00e0 \u0111\u1ed9 d\u1ebbo dai.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>B\u01b0\u1edbc<\/th><th>Chuy\u1ec7n g\u00ec x\u1ea3y ra<\/th><th>M\u1ed1i quan t\u00e2m c\u1ee7a ng\u01b0\u1eddi mua<\/th><\/tr><\/thead><tbody><tr><td>s\u01b0\u1edfi \u1ea5m<\/td><td>Th\u00e9p \u0111\u01b0\u1ee3c \u0111\u01b0a \u0111\u1ebfn kho\u1ea3ng nhi\u1ec7t \u0111\u1ed9 y\u00eau c\u1ea7u<\/td><td>Nhi\u1ec7t \u0111\u1ed9 sai \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn t\u00ednh ch\u1ea5t cu\u1ed1i c\u00f9ng<\/td><\/tr><tr><td>Quenching<\/td><td>L\u00e0m l\u1ea1nh nhanh l\u00e0m t\u0103ng \u0111\u1ed9 c\u1ee9ng<\/td><td>Ki\u1ec3m so\u00e1t k\u00e9m c\u00f3 th\u1ec3 g\u00e2y ra v\u1ebft n\u1ee9t ho\u1eb7c bi\u1ebfn d\u1ea1ng<\/td><\/tr><tr><td>Tempering<\/td><td>H\u00e2m n\u00f3ng \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 c\u1ee9ng v\u00e0 \u0111\u1ed9 d\u1ebbo dai<\/td><td>Qu\u00e1 tr\u00ecnh \u1ee7 c\u00f3 th\u1ec3 khi\u1ebfn b\u1ed9 ph\u1eadn tr\u1edf n\u00ean gi\u00f2n<\/td><\/tr><tr><td>Inspection<\/td><td>\u0110\u1ed9 c\u1ee9ng v\u00e0 s\u1ee9c m\u1ea1nh \u0111\u01b0\u1ee3c ki\u1ec3m tra<\/td><td>K\u1ebft qu\u1ea3 ph\u1ea3i ph\u00f9 h\u1ee3p v\u1edbi th\u1ee9 t\u1ef1 x\u1ebfp h\u1ea1ng<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u0110\u00e2y l\u00e0 l\u00fd do t\u1ea1i sao \u201ckh\u00f3 h\u01a1n\u201d kh\u00f4ng ph\u1ea3i l\u00fac n\u00e0o c\u0169ng c\u00f3 ngh\u0129a l\u00e0 \u201ct\u1ed1t h\u01a1n\u201d. Chi ti\u1ebft si\u1ebft ch\u1eb7t qu\u00e1 c\u1ee9ng c\u00f3 th\u1ec3 tr\u1edf n\u00ean gi\u00f2n. Chi ti\u1ebft si\u1ebft ch\u1eb7t qu\u00e1 m\u1ec1m c\u00f3 th\u1ec3 b\u1ecb h\u1ecfng khi ch\u1ecbu t\u1ea3i.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Ng\u01b0\u1eddi mua n\u00ean ki\u1ec3m tra nh\u1eefng g\u00ec<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\u0110\u1ed9 c\u1ee9ng ch\u1ec9 l\u00e0 m\u1ed9t ch\u1ec9 s\u1ed1<\/h3>\n\n\n\n<p>Ki\u1ec3m tra \u0111\u1ed9 c\u1ee9ng r\u1ea5t h\u1eefu \u00edch v\u00ec n\u00f3 nhanh ch\u00f3ng v\u00e0 cho th\u1ea5y li\u1ec7u qu\u00e1 tr\u00ecnh x\u1eed l\u00fd nhi\u1ec7t c\u00f3 ph\u00f9 h\u1ee3p hay kh\u00f4ng. Nh\u01b0ng n\u00f3 kh\u00f4ng ph\u1ea3i l\u00e0 ki\u1ec3m tra duy nh\u1ea5t.<\/p>\n\n\n\n<p>\u0110\u1ed1i v\u1edbi c\u00e1c \u1ed1c v\u00edt quan tr\u1ecdng, ng\u01b0\u1eddi mua c\u0169ng n\u00ean x\u00e1c nh\u1eadn:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u0110\u1ed9 b\u1ec1n k\u00e9o<\/li>\n\n\n\n<li>T\u1ea3i b\u1eb1ng ch\u1ee9ng ho\u1eb7c c\u01b0\u1eddng \u0111\u1ed9 n\u0103ng su\u1ea5t<\/li>\n\n\n\n<li>K\u1ebft qu\u1ea3 \u0111\u1ed9 b\u1ec1n n\u00eam khi c\u1ea7n thi\u1ebft<\/li>\n\n\n\n<li>Ki\u1ec3m so\u00e1t kh\u1eed cacbon<\/li>\n\n\n\n<li>S\u1ed1 nhi\u1ec7t v\u1eadt li\u1ec7u<\/li>\n\n\n\n<li>Truy xu\u1ea5t ngu\u1ed3n g\u1ed1c h\u00e0ng lo\u1ea1t<\/li>\n\n\n\n<li>T\u00ednh nh\u1ea5t qu\u00e1n c\u1ee7a \u0111\u00e1nh d\u1ea5u \u0111\u1ea7u<\/li>\n<\/ul>\n\n\n\n<p>\u0110\u1ed1i v\u1edbi bu l\u00f4ng v\u00e0 \u1ed1c v\u00edt c\u00f4ng nghi\u1ec7p th\u00f4ng th\u01b0\u1eddng, ng\u01b0\u1eddi mua c\u00f3 th\u1ec3 b\u1eaft \u0111\u1ea7u t\u1eeb <a href=\"https:\/\/xzfastener.com\/vi\/products-category\/standard-fasteners\/\">\u1ed1c v\u00edt ti\u00eau chu\u1ea9n<\/a> v\u00e0 sau \u0111\u00f3 x\u00e1c nh\u1eadn xem c\u00f3 c\u1ea7n lo\u1ea1i \u0111\u01b0\u1ee3c x\u1eed l\u00fd nhi\u1ec7t hay kh\u00f4ng.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">C\u00e1c v\u1ea5n \u0111\u1ec1 x\u1eed l\u00fd nhi\u1ec7t th\u01b0\u1eddng g\u1eb7p<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\u0110i\u1ec1u g\u00ec sai trong s\u1ea3n xu\u1ea5t th\u1ef1c t\u1ebf<\/h3>\n\n\n\n<p>C\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 x\u1eed l\u00fd nhi\u1ec7t th\u01b0\u1eddng \u0111\u01b0\u1ee3c \u1ea9n gi\u1ea5u cho \u0111\u1ebfn khi ki\u1ec3m tra ho\u1eb7c l\u1eafp \u0111\u1eb7t. C\u00e1c b\u1ed9 ph\u1eadn c\u00f3 th\u1ec3 tr\u00f4ng \u1ed5n nh\u01b0ng hi\u1ec7u su\u1ea5t c\u00f3 th\u1ec3 kh\u00f4ng \u1ed5n \u0111\u1ecbnh.<\/p>\n\n\n\n<p>Nh\u1eefng r\u1ee7i ro th\u01b0\u1eddng g\u1eb7p bao g\u1ed3m:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u0110\u1ed9 c\u1ee9ng kh\u00f4ng \u0111\u1ed3ng \u0111\u1ec1u trong c\u00f9ng m\u1ed9t m\u1ebb<\/li>\n\n\n\n<li>\u0110\u1ed9 c\u1ee9ng th\u1ea5p sau khi x\u1eed l\u00fd kh\u00f4ng \u0111\u1ee7<\/li>\n\n\n\n<li>\u0110\u1ed9 c\u1ee9ng qu\u00e1 m\u1ee9c v\u00e0 nguy c\u01a1 g\u00e3y x\u01b0\u01a1ng gi\u00f2n<\/li>\n\n\n\n<li>L\u00e0m ngu\u1ed9i v\u1ebft n\u1ee9t<\/li>\n\n\n\n<li>Kh\u1eed cacbon b\u1ec1 m\u1eb7t ren<\/li>\n\n\n\n<li>L\u1edbp h\u1ed7n h\u1ee3p sau khi x\u1eed l\u00fd nhi\u1ec7t<\/li>\n\n\n\n<li>B\u00e1o c\u00e1o th\u1eed nghi\u1ec7m kh\u00f4ng kh\u1edbp v\u1edbi l\u00f4 h\u00e0ng th\u1ef1c t\u1ebf<\/li>\n<\/ol>\n\n\n\n<p>\u0110\u1ed1i v\u1edbi \u1ed1c v\u00edt t\u00f9y ch\u1ec9nh, nh\u1eefng r\u1ee7i ro n\u00e0y ph\u1ea3i \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t tr\u01b0\u1edbc khi s\u1ea3n xu\u1ea5t. s\u1eed d\u1ee5ng <a href=\"https:\/\/xzfastener.com\/vi\/products-category\/custom-non-standard-fasteners\/\">\u1ed1c v\u00edt phi ti\u00eau chu\u1ea9n t\u00f9y ch\u1ec9nh<\/a> v\u00e0 x\u00e1c \u0111\u1ecbnh v\u1eadt li\u1ec7u, ph\u1ea1m vi \u0111\u1ed9 c\u1ee9ng v\u00e0 c\u00e1c y\u00eau c\u1ea7u ki\u1ec3m tra tr\u00ean b\u1ea3n v\u1ebd.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">L\u1edbp ph\u1ee7 sau khi x\u1eed l\u00fd nhi\u1ec7t<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">K\u1ebft th\u00fac c\u00f3 th\u1ec3 th\u00eam r\u1ee7i ro m\u1edbi<\/h3>\n\n\n\n<p>Nhi\u1ec1u \u1ed1c v\u00edt \u0111\u01b0\u1ee3c x\u1eed l\u00fd nhi\u1ec7t \u0111\u01b0\u1ee3c ph\u1ee7 sau khi x\u1eed l\u00fd c\u01b0\u1eddng \u0111\u1ed9. M\u1ea1 k\u1ebdm, m\u1ea1 k\u1ebdm nh\u00fang n\u00f3ng, v\u1ea3y k\u1ebdm, oxit \u0111en v\u00e0 l\u1edbp ph\u1ee7 \u0111\u1ec1u \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn s\u1ea3n ph\u1ea9m cu\u1ed1i c\u00f9ng m\u1ed9t c\u00e1ch kh\u00e1c nhau. (PTFE)<\/p>\n\n\n\n<p>L\u1edbp ph\u1ee7 c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Ph\u00f9 h\u1ee3p v\u1edbi ch\u1ee7 \u0111\u1ec1<\/li>\n\n\n\n<li>Ch\u1ed1ng \u0103n m\u00f2n<\/li>\n\n\n\n<li>H\u00e0nh vi m\u00f4-men xo\u1eafn<\/li>\n\n\n\n<li>B\u1ec1 m\u1eb7t xu\u1ea5t hi\u1ec7n<\/li>\n\n\n\n<li>Nguy c\u01a1 gi\u00f2n do hydro \u0111\u1ed1i v\u1edbi c\u00e1c b\u1ed9 ph\u1eadn \u0111\u01b0\u1ee3c m\u1ea1 c\u01b0\u1eddng \u0111\u1ed9 cao<\/li>\n<\/ul>\n\n\n\n<p>\u0110\u1ed1i v\u1edbi c\u00e1c \u0111\u01a1n h\u00e0ng nh\u1ea1y c\u1ea3m v\u1edbi s\u1ef1 \u0103n m\u00f2n, h\u00e3y so s\u00e1nh <a href=\"https:\/\/xzfastener.com\/vi\/products-category\/various-coated-fasteners\/\">\u1ed1c v\u00edt tr\u00e1ng kh\u00e1c nhau<\/a> tr\u01b0\u1edbc khi x\u00e1c nh\u1eadn k\u1ebft th\u00fac.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Danh s\u00e1ch ki\u1ec3m tra c\u1ee7a ng\u01b0\u1eddi mua (RFQ)<\/h2>\n\n\n\n<p>Tr\u01b0\u1edbc khi \u0111\u1eb7t h\u00e0ng, h\u00e3y x\u00e1c \u0111\u1ecbnh:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>RFQ M\u1ee5c<\/th><th>Nh\u1eefng g\u00ec c\u1ea7n x\u00e1c nh\u1eadn<\/th><\/tr><\/thead><tbody><tr><td>Lo\u1ea1i s\u1ea3n ph\u1ea9m<\/td><td>Bu l\u00f4ng, v\u00edt, ch\u1ed1t, \u0111ai \u1ed1c ho\u1eb7c b\u1ed9 ph\u1eadn t\u00f9y ch\u1ec9nh<\/td><\/tr><tr><td>Ti\u00eau chu\u1ea9n<\/td><td>ISO, DIN, ASTM, EN, ho\u1eb7c b\u1ea3n v\u1ebd<\/td><\/tr><tr><td>L\u1edbp<\/td><td>8.8, 10.9, 12.9, B7, ho\u1eb7c c\u1ea5p \u0111\u1ed9 d\u1ef1 \u00e1n<\/td><\/tr><tr><td>V\u1eadt li\u1ec7u<\/td><td>Lo\u1ea1i th\u00e9p cacbon ho\u1eb7c th\u00e9p h\u1ee3p kim<\/td><\/tr><tr><td>X\u1eed l\u00fd nhi\u1ec7t<\/td><td>B\u1eaft bu\u1ed9c ho\u1eb7c kh\u00f4ng b\u1eaft bu\u1ed9c<\/td><\/tr><tr><td>Ki\u1ec3m tra<\/td><td>\u0110\u1ed9 c\u1ee9ng, \u0111\u1ed9 b\u1ec1n k\u00e9o, t\u1ea3i tr\u1ecdng b\u1eb1ng ch\u1ee9ng, \u0111\u1ed9 b\u1ec1n n\u00eam<\/td><\/tr><tr><td>K\u1ebft th\u00fac<\/td><td>\u0110\u1ed3ng b\u1eb1ng, k\u1ebdm, HDG, v\u1ea3y k\u1ebdm, \u0111en, PTFE<\/td><\/tr><tr><td>Documents<\/td><td>MTC, b\u00e1o c\u00e1o ki\u1ec3m tra, truy xu\u1ea5t ngu\u1ed3n g\u1ed1c l\u00f4 h\u00e0ng<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u0110\u1ec3 l\u1eadp k\u1ebf ho\u1ea1ch t\u00ecm ngu\u1ed3n cung \u1ee9ng \u0111\u1ea7y \u0111\u1ee7, ng\u01b0\u1eddi mua c\u00f3 th\u1ec3 xem l\u1ea1i to\u00e0n b\u1ed9 <a href=\"https:\/\/xzfastener.com\/vi\/home\/products\/\">s\u1ea3n ph\u1ea9m chi ti\u1ebft si\u1ebft ch\u1eb7t<\/a> ph\u1ea1m vi.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">L\u1eddi khuy\u00ean cu\u1ed1i c\u00f9ng<\/h2>\n\n\n\n<p>X\u1eed l\u00fd nhi\u1ec7t c\u1ea3i thi\u1ec7n \u0111\u1ed9 b\u1ec1n v\u00e0 \u0111\u1ed9 c\u1ee9ng c\u1ee7a chi ti\u1ebft si\u1ebft ch\u1eb7t b\u1eb1ng c\u00e1ch ki\u1ec3m so\u00e1t k\u1ebft c\u1ea5u th\u00e9p. Nh\u01b0ng quy tr\u00ecnh n\u00e0y ph\u1ea3i ph\u00f9 h\u1ee3p v\u1edbi v\u1eadt li\u1ec7u, c\u1ea5p \u0111\u1ed9, ki\u1ec3m so\u00e1t l\u00f2, l\u00e0m ngu\u1ed9i, \u1ee7, ph\u1ee7 v\u00e0 ki\u1ec3m tra ch\u00ednh x\u00e1c.<\/p>\n\n\n\n<p>Ng\u01b0\u1eddi mua \u0111\u00e1ng tin c\u1eady kh\u00f4ng n\u00ean ph\u00ea duy\u1ec7t \u1ed1c v\u00edt \u0111\u01b0\u1ee3c x\u1eed l\u00fd nhi\u1ec7t ch\u1ec9 b\u1eb1ng gi\u00e1 c\u1ea3 ho\u1eb7c nh\u00e3n hi\u1ec7u \u0111\u1ea7u. X\u00e1c nh\u1eadn d\u1eef li\u1ec7u tr\u01b0\u1edbc khi giao h\u00e0ng. \u0110\u00f3 l\u00e0 c\u00e1ch an to\u00e0n nh\u1ea5t \u0111\u1ec3 tr\u00e1nh nh\u1eefng v\u1ea5n \u0111\u1ec1 ti\u1ec1m \u1ea9n v\u1ec1 s\u1ee9c m\u1ea1nh tr\u00ean s\u00e2n.<\/p>","protected":false},"excerpt":{"rendered":"<p>Heat treatment is where many high-strength fasteners get their real performance. The bolt may already have the correct shape after cold heading and thread rolling, but without proper heat treatment, it may not reach the required strength or hardness. For buyers, the main point is practical: do not judge a fastener only by appearance or [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-6831","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"acf":[],"_links":{"self":[{"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/posts\/6831","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/comments?post=6831"}],"version-history":[{"count":1,"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/posts\/6831\/revisions"}],"predecessor-version":[{"id":6921,"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/posts\/6831\/revisions\/6921"}],"wp:attachment":[{"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/media?parent=6831"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/categories?post=6831"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/tags?post=6831"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}