{"id":6579,"date":"2021-04-22T18:10:14","date_gmt":"2021-04-22T10:10:14","guid":{"rendered":"https:\/\/xzfastener.com\/?p=6579"},"modified":"2026-06-17T18:12:01","modified_gmt":"2026-06-17T10:12:01","slug":"heat-treatment-defects-in-high-strength-bolts-what-buyers-should-avoid","status":"publish","type":"post","link":"https:\/\/xzfastener.com\/vi\/heat-treatment-defects-in-high-strength-bolts-what-buyers-should-avoid\/","title":{"rendered":"Khi\u1ebfm khuy\u1ebft x\u1eed l\u00fd nhi\u1ec7t \u1edf bu l\u00f4ng c\u01b0\u1eddng \u0111\u1ed9 cao: Nh\u1eefng \u0111i\u1ec1u ng\u01b0\u1eddi mua n\u00ean tr\u00e1nh"},"content":{"rendered":"

Bu l\u00f4ng c\u01b0\u1eddng \u0111\u1ed9 cao kh\u00f4ng th\u1ec3 \u0111\u01b0\u1ee3c t\u1ea1o ra ch\u1eafc ch\u1eafn ch\u1ec9 b\u1eb1ng v\u1eadt li\u1ec7u. X\u1eed l\u00fd nhi\u1ec7t l\u00e0 qu\u00e1 tr\u00ecnh bi\u1ebfn th\u00e9p ph\u00f9 h\u1ee3p th\u00e0nh m\u1ed9t b\u1ed9 ph\u1eadn c\u01a1 kh\u00ed \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t. \u0110\u1ed1i v\u1edbi c\u00e1c lo\u1ea1i 8.8, 10.9, 12.9, ASTM B7, bu l\u00f4ng k\u1ebft c\u1ea5u, v\u00e0 c\u00e1c \u1ed1c v\u00edt ch\u1ecbu t\u1ea3i kh\u00e1c, vi\u1ec7c x\u1eed l\u00fd nhi\u1ec7t k\u00e9m c\u00f3 th\u1ec3 t\u1ea1o ra nh\u1eefng r\u1ee7i ro nghi\u00eam tr\u1ecdng.<\/p>\n\n\n\n

V\u1ea5n \u0111\u1ec1 l\u00e0 nhi\u1ec1u khi\u1ebfm khuy\u1ebft trong x\u1eed l\u00fd nhi\u1ec7t kh\u00f4ng th\u1ec3 hi\u1ec7n r\u00f5 qua b\u1ec1 ngo\u00e0i. M\u1ed9t bu l\u00f4ng c\u00f3 th\u1ec3 tr\u00f4ng s\u1ea1ch s\u1ebd, v\u01b0\u1ee3t qua qu\u00e1 tr\u00ecnh ki\u1ec3m tra tr\u1ef1c quan nhanh ch\u00f3ng nh\u01b0ng v\u1eabn qu\u00e1 m\u1ec1m, qu\u00e1 gi\u00f2n, n\u1ee9t, m\u1ea5t cacbon ho\u1eb7c kh\u00f4ng nh\u1ea5t qu\u00e1n trong l\u00f4.<\/p>\n\n\n\n

\u0110\u1ed1i v\u1edbi ng\u01b0\u1eddi mua, \u0111\u00e2y l\u00e0 l\u00fd do t\u1ea1i sao vi\u1ec7c x\u1eed l\u00fd nhi\u1ec7t ph\u1ea3i l\u00e0 m\u1ed9t ph\u1ea7n c\u1ee7a k\u1ebf ho\u1ea1ch ki\u1ec3m tra, ki\u1ec3m tra v\u00e0 \u0111\u00e1nh gi\u00e1 nh\u00e0 cung c\u1ea5p. Kh\u00f4ng ch\u1ec9 l\u00e0 m\u1ed9t quy tr\u00ecnh nh\u00e0 m\u00e1y \u1ea9n trong n\u1ec1n. (RFQ)<\/p>\n\n\n\n

T\u1ea1i sao x\u1eed l\u00fd nhi\u1ec7t l\u1ea1i quan tr\u1ecdng \u0111\u1ed1i v\u1edbi bu l\u00f4ng c\u01b0\u1eddng \u0111\u1ed9 cao<\/h2>\n\n\n\n

X\u1eed l\u00fd nhi\u1ec7t ki\u1ec3m so\u00e1t \u0111\u1ed9 b\u1ec1n, \u0111\u1ed9 c\u1ee9ng, \u0111\u1ed9 d\u1ebbo dai v\u00e0 kh\u1ea3 n\u0103ng ch\u1ecbu t\u1ea3i. Trong h\u1ea7u h\u1ebft qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t bu l\u00f4ng c\u01b0\u1eddng \u0111\u1ed9 cao, quy tr\u00ecnh n\u00e0y bao g\u1ed3m gia nhi\u1ec7t, l\u00e0m ngu\u1ed9i v\u00e0 \u1ee7.<\/p>\n\n\n\n

N\u1ebfu b\u1ea5t k\u1ef3 b\u01b0\u1edbc n\u00e0o \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t k\u00e9m, bu l\u00f4ng cu\u1ed1i c\u00f9ng c\u00f3 th\u1ec3 kh\u00f4ng \u0111\u00e1p \u1ee9ng \u0111\u01b0\u1ee3c c\u00e1c \u0111\u1eb7c t\u00ednh c\u01a1 h\u1ecdc c\u1ea7n thi\u1ebft.<\/p>\n\n\n\n

T\u00ecm ngu\u1ed3n cung \u1ee9ng ng\u01b0\u1eddi mua \u1ed1c v\u00edt c\u01b0\u1eddng \u0111\u1ed9 cao<\/a> c\u1ea7n x\u00e1c nh\u1eadn c\u00e1c y\u00eau c\u1ea7u v\u1ec1 v\u1eadt li\u1ec7u, c\u1ea5p \u0111\u1ed9, x\u1eed l\u00fd nhi\u1ec7t v\u00e0 th\u1eed nghi\u1ec7m tr\u01b0\u1edbc khi s\u1ea3n xu\u1ea5t h\u00e0ng lo\u1ea1t.<\/p>\n\n\n\n

Khi\u1ebfm khuy\u1ebft x\u1eed l\u00fd nhi\u1ec7t ph\u1ed5 bi\u1ebfn<\/h2>\n\n\n\n

\u0110\u1ed9 c\u1ee9ng d\u01b0\u1edbi ho\u1eb7c c\u01b0\u1eddng \u0111\u1ed9 th\u1ea5p<\/h3>\n\n\n\n

N\u1ebfu qu\u00e1 tr\u00ecnh gia nhi\u1ec7t, l\u00e0m ngu\u1ed9i ho\u1eb7c l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u kh\u00f4ng ch\u00ednh x\u00e1c, bu l\u00f4ng c\u00f3 th\u1ec3 kh\u00f4ng \u0111\u1ea1t \u0111\u01b0\u1ee3c c\u1ea5p \u0111\u1ed9 y\u00eau c\u1ea7u.<\/p>\n\n\n\n

khi\u1ebfm khuy\u1ebft<\/th>Nguy\u00ean nh\u00e2n c\u00f3 th\u1ec3<\/th>R\u1ee7i ro c\u1ee7a ng\u01b0\u1eddi mua<\/th><\/tr><\/thead>
\u0110\u1ed9 c\u1ee9ng th\u1ea5p<\/td>L\u00e0m ngu\u1ed9i kh\u00f4ng \u0111\u1ee7 ho\u1eb7c th\u00e9p sai<\/td>\u0110\u1ed9 b\u1ec1n k\u00e9o th\u1ea5p<\/td><\/tr>
\u0110\u1ed9 b\u1ec1n k\u00e9o th\u1ea5p<\/td>Ph\u1ea3n \u1ee9ng x\u1eed l\u00fd nhi\u1ec7t k\u00e9m<\/td>Bu l\u00f4ng c\u00f3 th\u1ec3 b\u1ecb gi\u00e3n ho\u1eb7c h\u1ecfng khi ch\u1ecbu t\u1ea3i<\/td><\/tr>
\u0110\u1ed9 c\u1ee9ng kh\u00f4ng \u0111\u1ed3ng \u0111\u1ec1u<\/td>L\u00f2 nung ho\u1eb7c d\u1eadp t\u1eaft s\u1ef1 kh\u00f4ng nh\u1ea5t qu\u00e1n<\/td>Hi\u1ec7u su\u1ea5t h\u1ed7n h\u1ee3p trong m\u1ed9t \u0111\u1ee3t<\/td><\/tr>
K\u1ebft qu\u1ea3 t\u1ea3i b\u1eb1ng ch\u1ee9ng k\u00e9m<\/td>V\u1ea5n \u0111\u1ec1 v\u1ec1 v\u1eadt li\u1ec7u ho\u1eb7c x\u1eed l\u00fd nhi\u1ec7t<\/td>Kh\u1edbp c\u00f3 th\u1ec3 kh\u00f4ng gi\u1eef \u0111\u01b0\u1ee3c t\u1ea3i tr\u01b0\u1edbc<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

\u0110i\u1ec1u n\u00e0y \u0111\u1eb7c bi\u1ec7t nguy hi\u1ec3m khi bu l\u00f4ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong m\u00e1y m\u00f3c, k\u1ebft c\u1ea5u th\u00e9p, thi\u1ebft b\u1ecb n\u1eb7ng ho\u1eb7c c\u00e1c c\u1ee5m d\u1ec5 b\u1ecb rung.<\/p>\n\n\n\n

\u0110\u1ed9 c\u1ee9ng v\u00e0 \u0111\u1ed9 gi\u00f2n qu\u00e1 m\u1ee9c<\/h3>\n\n\n\n

\u0110\u1ed9 c\u1ee9ng cao h\u01a1n kh\u00f4ng ph\u1ea3i l\u00fac n\u00e0o c\u0169ng t\u1ed1t h\u01a1n. N\u1ebfu bu l\u00f4ng qu\u00e1 c\u1ee9ng, n\u00f3 c\u00f3 th\u1ec3 m\u1ea5t \u0111\u1ed9 d\u1ebbo dai v\u00e0 d\u1ec5 b\u1ecb g\u00e3y h\u01a1n.<\/p>\n\n\n\n

R\u1ee7i ro n\u00e0y t\u0103ng l\u00ean \u1edf c\u00e1c c\u1ea5p \u0111\u1ed9 b\u1ec1n cao, \u0111\u1eb7c bi\u1ec7t khi bu l\u00f4ng c\u0169ng \u0111\u01b0\u1ee3c m\u1ea1, si\u1ebft qu\u00e1 ch\u1eb7t ho\u1eb7c ti\u1ebfp x\u00fac v\u1edbi \u0111i\u1ec1u ki\u1ec7n gi\u00f2n hydro.<\/p>\n\n\n\n

Ng\u01b0\u1eddi mua kh\u00f4ng n\u00ean ch\u1ea5p nh\u1eadn \u201cc\u00e0ng kh\u00f3 c\u00e0ng m\u1ea1nh\u201d nh\u01b0 m\u1ed9t c\u00e2u tr\u1ea3 l\u1eddi c\u00f3 ch\u1ea5t l\u01b0\u1ee3ng. \u0110\u1ed9 c\u1ee9ng ph\u1ea3i n\u1eb1m trong ph\u1ea1m vi quy \u0111\u1ecbnh.<\/p>\n\n\n\n

Decarburization<\/h3>\n\n\n\n

Qu\u00e1 tr\u00ecnh kh\u1eed cacbon x\u1ea3y ra khi carbon b\u1ecb m\u1ea5t kh\u1ecfi b\u1ec1 m\u1eb7t bu l\u00f4ng trong qu\u00e1 tr\u00ecnh gia nhi\u1ec7t. \u0110i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m \u0111\u1ed9 b\u1ec1n b\u1ec1 m\u1eb7t, \u0111\u1eb7c bi\u1ec7t l\u00e0 \u1edf g\u1ea7n c\u00e1c s\u1ee3i.<\/p>\n\n\n\n

Ch\u1ee7 \u0111\u1ec1 \u0111\u00e3 l\u00e0 khu v\u1ef1c nh\u1ea1y c\u1ea3m v\u1edbi c\u0103ng th\u1eb3ng. N\u1ebfu b\u1ec1 m\u1eb7t ren b\u1ecb y\u1ebfu \u0111i, tu\u1ed5i th\u1ecd m\u1ecfi v\u00e0 hi\u1ec7u su\u1ea5t ch\u1ecbu t\u1ea3i c\u00f3 th\u1ec3 b\u1ecb \u1ea3nh h\u01b0\u1edfng.<\/p>\n\n\n\n

L\u00e0m d\u1ecbu v\u1ebft n\u1ee9t<\/h3>\n\n\n\n

C\u00e1c v\u1ebft n\u1ee9t ngu\u1ed9i l\u00e0 nh\u1eefng khuy\u1ebft t\u1eadt nghi\u00eam tr\u1ecdng. Ch\u00fang c\u00f3 th\u1ec3 x\u1ea3y ra khi qu\u00e1 tr\u00ecnh l\u00e0m m\u00e1t qu\u00e1 nghi\u00eam tr\u1ecdng, t\u00ednh ch\u1ea5t h\u00f3a h\u1ecdc c\u1ee7a th\u00e9p kh\u00f4ng ph\u00f9 h\u1ee3p, h\u00ecnh h\u1ecdc t\u1ea1o ra s\u1ef1 t\u1eadp trung \u1ee9ng su\u1ea5t ho\u1eb7c ki\u1ec3m so\u00e1t quy tr\u00ecnh k\u00e9m.<\/p>\n\n\n\n

Bu l\u00f4ng b\u1ecb n\u1ee9t kh\u00f4ng bao gi\u1edd \u0111\u01b0\u1ee3c ch\u1ea5p nh\u1eadn \u0111\u1ec3 s\u1eed d\u1ee5ng ch\u1ecbu t\u1ea3i. Ki\u1ec3m tra b\u1eb1ng m\u1eaft c\u00f3 th\u1ec3 ph\u00e1t hi\u1ec7n c\u00e1c v\u1ebft n\u1ee9t r\u00f5 r\u00e0ng, nh\u01b0ng c\u00e1c \u1ed1c v\u00edt c\u00f3 \u0111\u1ed9 b\u1ec1n cao quan tr\u1ecdng c\u00f3 th\u1ec3 c\u1ea7n c\u00e1c ph\u01b0\u01a1ng ph\u00e1p ki\u1ec3m tra m\u1ea1nh h\u01a1n.<\/p>\n\n\n\n

N\u01a1i khi\u1ebfm khuy\u1ebft th\u01b0\u1eddng xu\u1ea5t hi\u1ec7n<\/h2>\n\n\n\n

V\u1ea5n \u0111\u1ec1 x\u1eed l\u00fd nhi\u1ec7t th\u01b0\u1eddng \u0111\u01b0\u1ee3c t\u00ecm th\u1ea5y \u1edf nh\u1eefng khu v\u1ef1c n\u00e0y:<\/p>\n\n\n\n

Khu v\u1ef1c ch\u1ed1t<\/th>R\u1ee7i ro chung<\/th><\/tr><\/thead>
Ch\u1ee7 \u0111\u1ec1 g\u1ed1c<\/td>V\u1ebft n\u1ee9t m\u1ecfi, kh\u1eed cacbon, t\u1eadp trung \u1ee9ng su\u1ea5t<\/td><\/tr>
Chuy\u1ec3n \u0111\u1ed5i t\u1eeb \u0111\u1ea7u sang ch\u00e2n<\/td>C\u00e1c v\u1ebft n\u1ee9t do h\u00ecnh th\u00e0nh ho\u1eb7c \u1ee9ng su\u1ea5t x\u1eed l\u00fd nhi\u1ec7t<\/td><\/tr>
Ch\u00e2n<\/td>\u0110\u1ed9 c\u1ee9ng kh\u00f4ng nh\u1ea5t qu\u00e1n ho\u1eb7c r\u1ee7i ro u\u1ed1n cong<\/td><\/tr>
b\u1ec1 m\u1eb7t<\/td>Quy m\u00f4, v\u1ebft n\u1ee9t, kh\u1eed cacbon<\/td><\/tr>
Bi\u1ebfn th\u1ec3 h\u00e0ng lo\u1ea1t<\/td>M\u1ed9t s\u1ed1 ph\u1ea7n v\u01b0\u1ee3t qua trong khi nh\u1eefng ph\u1ea7n kh\u00e1c th\u1ea5t b\u1ea1i<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

\u0110\u1ec3 l\u1eadp k\u1ebf ho\u1ea1ch l\u1eafp r\u00e1p \u0111\u1ea7y \u0111\u1ee7, ng\u01b0\u1eddi mua c\u00f3 th\u1ec3 xem x\u00e9t ph\u1ea1m vi r\u1ed9ng h\u01a1n s\u1ea3n ph\u1ea9m chi ti\u1ebft si\u1ebft ch\u1eb7t<\/a> ph\u1ea1m vi v\u00e0 kh\u1edbp c\u00e1c bu l\u00f4ng v\u1edbi \u0111ai \u1ed1c, v\u00f2ng \u0111\u1ec7m th\u00edch h\u1ee3p v\u00e0 c\u00e1c y\u00eau c\u1ea7u ki\u1ec3m tra.<\/p>\n\n\n\n

R\u1ee7i ro x\u1eed l\u00fd nhi\u1ec7t v\u00e0 ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t<\/h2>\n\n\n\n

X\u1eed l\u00fd nhi\u1ec7t kh\u00f4ng \u0111\u1ee9ng m\u1ed9t m\u00ecnh. Vi\u1ec7c x\u1eed l\u00fd b\u1ec1 m\u1eb7t sau n\u00e0y c\u00f3 th\u1ec3 t\u1ea1o th\u00eam nh\u1eefng r\u1ee7i ro m\u1edbi.<\/p>\n\n\n\n

M\u1ea1 k\u1ebdm, m\u1ea1 k\u1ebdm nh\u00fang n\u00f3ng, oxit \u0111en, l\u1edbp ph\u1ee7 lo\u1ea1i v\u00e0 l\u1edbp ph\u1ee7 \u0111\u1ec1u c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn \u0111\u1ed9 kh\u00edt c\u1ee7a ren, kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n v\u00e0 ho\u1ea1t \u0111\u1ed9ng l\u1eafp r\u00e1p. (PTFE)<\/p>\n\n\n\n

\u0110\u1ed1i v\u1edbi c\u00e1c bu l\u00f4ng c\u00f3 \u0111\u1ed9 b\u1ec1n cao, m\u1ea1 \u0111i\u1ec7n c\u0169ng c\u1ea7n ch\u00fa \u00fd \u0111\u1ebfn nguy c\u01a1 gi\u00f2n do hydro. N\u1ebfu y\u00eau c\u1ea7u m\u1ea1 k\u1ebdm, ng\u01b0\u1eddi mua n\u00ean h\u1ecfi v\u1ec1 qu\u00e1 tr\u00ecnh nung sau m\u1ea1, ki\u1ec3m so\u00e1t quy tr\u00ecnh v\u00e0 truy xu\u1ea5t ngu\u1ed3n g\u1ed1c l\u00f4.<\/p>\n\n\n\n

\u0110\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng nh\u1ea1y c\u1ea3m v\u1edbi s\u1ef1 \u0103n m\u00f2n, h\u00e3y xem l\u1ea1i \u1ed1c v\u00edt tr\u00e1ng<\/a> tr\u01b0\u1edbc khi ph\u00ea duy\u1ec7t k\u1ebft th\u00fac cu\u1ed1i c\u00f9ng.<\/p>\n\n\n\n

Ng\u01b0\u1eddi mua n\u00ean y\u00eau c\u1ea7u g\u00ec<\/h2>\n\n\n\n

T\u00e0i li\u1ec7u ch\u00ednh<\/h3>\n\n\n\n

M\u1ed9t \u0111\u01a1n \u0111\u1eb7t h\u00e0ng bu l\u00f4ng c\u01b0\u1eddng \u0111\u1ed9 cao th\u00edch h\u1ee3p ph\u1ea3i bao g\u1ed3m nhi\u1ec1u h\u01a1n m\u1ed9t danh s\u00e1ch \u0111\u00f3ng g\u00f3i.<\/p>\n\n\n\n

Y\u00eau c\u1ea7u:<\/p>\n\n\n\n

    \n
  1. Gi\u1ea5y ch\u1ee9ng nh\u1eadn ki\u1ec3m tra v\u1eadt li\u1ec7u<\/li>\n\n\n\n
  2. H\u1ed3 s\u01a1 x\u1eed l\u00fd nhi\u1ec7t<\/li>\n\n\n\n
  3. B\u00e1o c\u00e1o ki\u1ec3m tra \u0111\u1ed9 c\u1ee9ng<\/li>\n\n\n\n
  4. B\u00e1o c\u00e1o th\u1eed nghi\u1ec7m k\u00e9o<\/li>\n\n\n\n
  5. B\u00e1o c\u00e1o t\u1ea3i b\u1eb1ng ch\u1ee9ng n\u1ebfu \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u<\/li>\n\n\n\n
  6. B\u00e1o c\u00e1o ki\u1ec3m tra ch\u1ee7 \u0111\u1ec1<\/li>\n\n\n\n
  7. B\u00e1o c\u00e1o ki\u1ec3m tra l\u1edbp ph\u1ee7 n\u1ebfu c\u00f3<\/li>\n\n\n\n
  8. Truy xu\u1ea5t ngu\u1ed3n g\u1ed1c h\u00e0ng lo\u1ea1t ho\u1eb7c l\u00f4<\/li>\n<\/ol>\n\n\n\n

    \u0110\u1ed1i v\u1edbi c\u00e1c k\u00edch th\u01b0\u1edbc \u0111\u1eb7c bi\u1ec7t ho\u1eb7c c\u00e1c b\u1ed9 ph\u1eadn d\u1ef1a tr\u00ean b\u1ea3n v\u1ebd, \u1ed1c v\u00edt phi ti\u00eau chu\u1ea9n t\u00f9y ch\u1ec9nh<\/a> ph\u1ea3i \u0111\u01b0\u1ee3c ki\u1ec3m tra theo b\u1ea3n v\u1ebd v\u00e0 y\u00eau c\u1ea7u k\u1ef9 thu\u1eadt \u0111\u00e3 \u0111\u01b0\u1ee3c ph\u00ea duy\u1ec7t.<\/p>\n\n\n\n

    Ki\u1ec3m tra tr\u01b0\u1edbc khi giao h\u00e0ng<\/h3>\n\n\n\n

    Ng\u01b0\u1eddi mua n\u00ean x\u00e1c nh\u1eadn vi\u1ec7c ki\u1ec3m tra tr\u01b0\u1edbc khi giao h\u00e0ng, kh\u00f4ng ph\u1ea3i sau khi h\u00e0ng \u0111\u1ebfn.<\/p>\n\n\n\n

    M\u1ee5c ki\u1ec3m tra<\/th>M\u1ee5c \u0111\u00edch<\/th><\/tr><\/thead>
    Ki\u1ec3m tra \u0111\u1ed9 c\u1ee9ng<\/td>Ki\u1ec3m tra t\u00ednh nh\u1ea5t qu\u00e1n x\u1eed l\u00fd nhi\u1ec7t<\/td><\/tr>
    Ki\u1ec3m tra \u0111\u1ed9 b\u1ec1n k\u00e9o<\/td>X\u00e1c minh y\u00eau c\u1ea7u s\u1ee9c m\u1ea1nh<\/td><\/tr>
    Ki\u1ec3m tra t\u1ea3i b\u1eb1ng ch\u1ee9ng<\/td>Kh\u1eb3ng \u0111\u1ecbnh kh\u1ea3 n\u0103ng ch\u1ecbu t\u1ea3i<\/td><\/tr>
    Ki\u1ec3m tra kh\u1eed cacbon<\/td>\u0110\u00e1nh gi\u00e1 t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a s\u1ee3i v\u00e0 b\u1ec1 m\u1eb7t<\/td><\/tr>
    Ki\u1ec3m tra tr\u1ef1c quan<\/td>T\u00ecm th\u1ea5y c\u00e1c v\u1ebft n\u1ee9t, quy m\u00f4, bi\u1ebfn d\u1ea1ng r\u00f5 r\u00e0ng<\/td><\/tr>
    Ki\u1ec3m tra th\u01b0\u1edbc \u0111o ren<\/td>X\u00e1c nh\u1eadn l\u1eafp r\u00e1p ph\u00f9 h\u1ee3p<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

    Nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn c\u1ee7a ng\u01b0\u1eddi mua<\/h2>\n\n\n\n

    Tr\u00e1nh nh\u1eefng v\u1ea5n \u0111\u1ec1 sau:<\/p>\n\n\n\n

      \n
    • \u0110\u1eb7t mua bu l\u00f4ng c\u01b0\u1eddng \u0111\u1ed9 cao m\u00e0 kh\u00f4ng ghi r\u00f5 m\u00e1c.<\/li>\n\n\n\n
    • Ch\u1ea5p nh\u1eadn gi\u00e1 tr\u01b0\u1edbc khi x\u00e1c nh\u1eadn kh\u1ea3 n\u0103ng x\u1eed l\u00fd nhi\u1ec7t.<\/li>\n\n\n\n
    • Y\u00eau c\u1ea7u m\u1ea1 k\u1ebdm m\u00e0 kh\u00f4ng th\u1ea3o lu\u1eadn v\u1ec1 vi\u1ec7c ki\u1ec3m so\u00e1t \u0111\u1ed9 gi\u00f2n.<\/li>\n\n\n\n
    • B\u1ecf qua ph\u1ea1m vi \u0111\u1ed9 c\u1ee9ng v\u00e0 ch\u1ec9 ki\u1ec3m tra b\u1ec1 ngo\u00e0i.<\/li>\n\n\n\n
    • S\u1eed d\u1ee5ng \u0111ai \u1ed1c c\u1ea5p th\u1ea5p v\u1edbi bu l\u00f4ng c\u00f3 \u0111\u1ed9 b\u1ec1n cao.<\/li>\n\n\n\n
    • B\u1ecf qua b\u00e1o c\u00e1o ki\u1ec3m tra \u0111\u1ec3 ti\u1ebft ki\u1ec7m th\u1eddi gian.<\/li>\n\n\n\n
    • X\u1eed l\u00fd c\u00e1c bu l\u00f4ng c\u01b0\u1eddng \u0111\u1ed9 cao t\u00f9y ch\u1ec9nh nh\u01b0 c\u00e1c m\u1eb7t h\u00e0ng ti\u00eau chu\u1ea9n.<\/li>\n<\/ul>\n\n\n\n

      Nh\u1eefng sai l\u1ea7m n\u00e0y th\u01b0\u1eddng g\u00e2y t\u1ed1n k\u00e9m sau khi giao h\u00e0ng h\u01a1n l\u00e0 ti\u1ebft ki\u1ec7m \u0111\u01b0\u1ee3c trong qu\u00e1 tr\u00ecnh t\u00ecm ngu\u1ed3n cung \u1ee9ng.<\/p>\n\n\n\n

      RFQ Danh s\u00e1ch ki\u1ec3m tra cho Bu l\u00f4ng c\u01b0\u1eddng \u0111\u1ed9 cao \u0111\u01b0\u1ee3c x\u1eed l\u00fd nhi\u1ec7t<\/h2>\n\n\n\n

      Tr\u01b0\u1edbc khi \u0111\u1eb7t h\u00e0ng, h\u00e3y x\u00e1c nh\u1eadn:<\/p>\n\n\n\n

        \n
      • Ti\u00eau chu\u1ea9n s\u1ea3n ph\u1ea9m ho\u1eb7c b\u1ea3n v\u1ebd<\/li>\n\n\n\n
      • K\u00edch th\u01b0\u1edbc bu l\u00f4ng, chi\u1ec1u d\u00e0i, b\u01b0\u1edbc ren v\u00e0 chi\u1ec1u d\u00e0i ren<\/li>\n\n\n\n
      • L\u1edbp v\u1eadt li\u1ec7u<\/li>\n\n\n\n
      • C\u1ea5p \u0111\u1ed9 s\u1ee9c m\u1ea1nh ho\u1eb7c lo\u1ea1i thu\u1ed9c t\u00ednh<\/li>\n\n\n\n
      • Y\u00eau c\u1ea7u x\u1eed l\u00fd nhi\u1ec7t<\/li>\n\n\n\n
      • Ph\u1ea1m vi \u0111\u1ed9 c\u1ee9ng<\/li>\n\n\n\n
      • B\u1ec1 m\u1eb7t ho\u00e0n thi\u1ec7n<\/li>\n\n\n\n
      • C\u00e1c lo\u1ea1i h\u1ea1t v\u00e0 v\u00f2ng \u0111\u1ec7m ph\u00f9 h\u1ee3p<\/li>\n\n\n\n
      • T\u1ea3i \u1ee9ng d\u1ee5ng v\u00e0 m\u00f4i tr\u01b0\u1eddng l\u00e0m vi\u1ec7c<\/li>\n\n\n\n
      • Gi\u1ea5y ch\u1ee9ng nh\u1eadn v\u00e0 b\u00e1o c\u00e1o th\u1eed nghi\u1ec7m c\u1ea7n thi\u1ebft<\/li>\n\n\n\n
      • Bao b\u00ec, nh\u00e3n v\u00e0 truy xu\u1ea5t ngu\u1ed3n g\u1ed1c l\u00f4<\/li>\n<\/ul>\n\n\n\n

        L\u1eddi khuy\u00ean cu\u1ed1i c\u00f9ng<\/h2>\n\n\n\n

        Ch\u1ea5t l\u01b0\u1ee3ng x\u1eed l\u00fd nhi\u1ec7t quy\u1ebft \u0111\u1ecbnh li\u1ec7u bu l\u00f4ng c\u01b0\u1eddng \u0111\u1ed9 cao c\u00f3 ho\u1ea1t \u0111\u1ed9ng nh\u01b0 mong mu\u1ed1n hay kh\u00f4ng. Ng\u01b0\u1eddi mua kh\u00f4ng th\u1ec3 \u0111\u00e1nh gi\u00e1 n\u00f3 ch\u1ec9 b\u1eb1ng v\u1ebb b\u1ec1 ngo\u00e0i.<\/p>\n\n\n\n

        M\u1ed9t \u0111\u01a1n \u0111\u1eb7t h\u00e0ng \u0111\u00e1ng tin c\u1eady ph\u1ea3i x\u00e1c \u0111\u1ecbnh v\u1eadt li\u1ec7u, c\u1ea5p \u0111\u1ed9, x\u1eed l\u00fd nhi\u1ec7t, l\u1edbp ph\u1ee7, ki\u1ec3m tra v\u00e0 t\u00e0i li\u1ec7u tr\u01b0\u1edbc khi s\u1ea3n xu\u1ea5t. \u0110\u00f3 l\u00e0 c\u00e1ch an to\u00e0n nh\u1ea5t \u0111\u1ec3 tr\u00e1nh bu l\u00f4ng m\u1ec1m, bu l\u00f4ng gi\u00f2n, bu l\u00f4ng b\u1ecb n\u1ee9t, l\u00f4 c\u00f3 c\u01b0\u1eddng \u0111\u1ed9 sai v\u00e0 h\u01b0 h\u1ecfng t\u1ea1i hi\u1ec7n tr\u01b0\u1eddng t\u1ed1n k\u00e9m.<\/p>","protected":false},"excerpt":{"rendered":"

        High-strength bolts are not made strong by material alone. Heat treatment is what turns suitable steel into a controlled mechanical part. For class 8.8, 10.9, 12.9, ASTM B7, structural bolts, and other load-bearing fasteners, poor heat treatment can create serious risks. The problem is that many heat treatment defects are not obvious by appearance. A […]<\/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":[479],"tags":[499],"class_list":["post-6579","post","type-post","status-publish","format-standard","hentry","category-fastener-knowledge-library","tag-fastener-manufacturing-processes"],"acf":[],"_links":{"self":[{"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/posts\/6579","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=6579"}],"version-history":[{"count":1,"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/posts\/6579\/revisions"}],"predecessor-version":[{"id":6580,"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/posts\/6579\/revisions\/6580"}],"wp:attachment":[{"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/media?parent=6579"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/categories?post=6579"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/tags?post=6579"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}