{"id":6492,"date":"2023-06-22T15:53:23","date_gmt":"2023-06-22T07:53:23","guid":{"rendered":"https:\/\/xzfastener.com\/?p=6492"},"modified":"2026-06-16T15:54:41","modified_gmt":"2026-06-16T07:54:41","slug":"tightening-torque-and-hydrogen-embrittlement-risk-in-high-strength-bolts","status":"publish","type":"post","link":"https:\/\/xzfastener.com\/vi\/tightening-torque-and-hydrogen-embrittlement-risk-in-high-strength-bolts\/","title":{"rendered":"R\u1ee7i ro si\u1ebft ch\u1eb7t m\u00f4-men xo\u1eafn v\u00e0 hi\u1ec7n t\u01b0\u1ee3ng gi\u00f2n hydro \u1edf bu l\u00f4ng c\u01b0\u1eddng \u0111\u1ed9 cao"},"content":{"rendered":"

Bu l\u00f4ng c\u01b0\u1eddng \u0111\u1ed9 cao th\u01b0\u1eddng \u0111\u01b0\u1ee3c l\u1ef1a ch\u1ecdn v\u00ec m\u1ed1i n\u1ed1i ph\u1ea3i ch\u1ecbu t\u1ea3i tr\u1ecdng l\u1edbn. \u0110i\u1ec1u \u0111\u00f3 ph\u1ed5 bi\u1ebfn trong c\u00e1c k\u1ebft c\u1ea5u th\u00e9p, m\u00e1y m\u00f3c h\u1ea1ng n\u1eb7ng, n\u0103ng l\u01b0\u1ee3ng gi\u00f3, h\u1ec7 th\u1ed1ng \u00f4 t\u00f4, thi\u1ebft b\u1ecb n\u00e2ng h\u1ea1 v\u00e0 c\u00e1c t\u1ed5 h\u1ee3p li\u00ean quan \u0111\u1ebfn \u00e1p su\u1ea5t. Nh\u01b0ng c\u01b0\u1eddng \u0111\u1ed9 cao h\u01a1n c\u0169ng mang l\u1ea1i y\u00eau c\u1ea7u ki\u1ec3m so\u00e1t ch\u1eb7t ch\u1ebd h\u01a1n.<\/p>\n\n\n\n

Hai v\u1ea5n \u0111\u1ec1 \u0111\u00e1ng \u0111\u01b0\u1ee3c quan t\u00e2m \u0111\u1eb7c bi\u1ec7t: m\u00f4-men xo\u1eafn si\u1ebft ch\u1eb7t v\u00e0 nguy c\u01a1 gi\u00f2n do hydro. Ch\u00fang kh\u00f4ng ph\u1ea3i l\u00e0 c\u00f9ng m\u1ed9t v\u1ea5n \u0111\u1ec1, nh\u01b0ng ch\u00fang th\u01b0\u1eddng g\u1eb7p nhau trong c\u00f9ng m\u1ed9t \u1ee9ng d\u1ee5ng. M\u1ed9t bu l\u00f4ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ph\u00e2n lo\u1ea1i ch\u00ednh x\u00e1c, \u0111\u01b0\u1ee3c ph\u1ee7 \u0111\u00fang c\u00e1ch nh\u01b0ng v\u1eabn b\u1ecb h\u1ecfng n\u1ebfu t\u1ea3i tr\u01b0\u1edbc, m\u1ea1, \u0111\u1ed9 c\u1ee9ng v\u1eadt li\u1ec7u ho\u1eb7c ki\u1ec3m so\u00e1t sau x\u1eed l\u00fd kh\u00f4ng \u0111\u01b0\u1ee3c x\u1eed l\u00fd ch\u00ednh x\u00e1c.<\/p>\n\n\n\n

\u0110\u1ed1i v\u1edbi ng\u01b0\u1eddi mua t\u00ecm ngu\u1ed3n cung \u1ee9ng \u1ed1c v\u00edt c\u01b0\u1eddng \u0111\u1ed9 cao<\/a>, ch\u1ee7 \u0111\u1ec1 n\u00e0y n\u00ean \u0111\u01b0\u1ee3c th\u1ea3o lu\u1eadn tr\u01b0\u1edbc khi s\u1ea3n xu\u1ea5t ch\u1ee9 kh\u00f4ng ph\u1ea3i sau khi c\u00e0i \u0111\u1eb7t.<\/p>\n\n\n\n

T\u1ea1i sao vi\u1ec7c th\u1eaft ch\u1eb7t m\u00f4-men xo\u1eafn l\u1ea1i quan tr\u1ecdng<\/h2>\n\n\n\n

M\u00f4-men xo\u1eafn si\u1ebft ch\u1eb7t l\u00e0 l\u1ef1c quay \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng trong qu\u00e1 tr\u00ecnh l\u1eafp \u0111\u1eb7t. M\u1ee5c \u0111\u00edch c\u1ee7a n\u00f3 l\u00e0 t\u1ea1o ra t\u1ea3i tr\u01b0\u1edbc \u0111\u1ec3 k\u1eb9p c\u00e1c m\u1ed1i n\u1ed1i l\u1ea1i v\u1edbi nhau.<\/p>\n\n\n\n

Sai l\u1ea7m ph\u1ed5 bi\u1ebfn l\u00e0 gi\u1ea3 \u0111\u1ecbnh m\u00f4-men xo\u1eafn v\u00e0 t\u1ea3i tr\u01b0\u1edbc l\u00e0 nh\u01b0 nhau. H\u1ecd kh\u00f4ng nh\u01b0 v\u1eady.<\/p>\n\n\n\n

M\u00f4-men xo\u1eafn ch\u1ec9 l\u00e0 \u0111\u1ea7u v\u00e0o. T\u1ea3i tr\u01b0\u1edbc l\u00e0 k\u1ebft qu\u1ea3. T\u1ea3i tr\u01b0\u1edbc cu\u1ed1i c\u00f9ng ph\u1ee5 thu\u1ed9c v\u00e0o ma s\u00e1t ren, ma s\u00e1t b\u1ec1 m\u1eb7t \u1ed5 tr\u1ee5c, b\u00f4i tr\u01a1n, l\u1edbp ph\u1ee7, t\u00ecnh tr\u1ea1ng v\u00f2ng \u0111\u1ec7m, dung sai ren v\u00e0 \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a d\u1ee5ng c\u1ee5 l\u1eafp \u0111\u1eb7t.<\/p>\n\n\n\n

Bi\u1ebfn m\u00f4-men xo\u1eafn Ng\u01b0\u1eddi mua n\u00ean x\u00e1c nh\u1eadn<\/h3>\n\n\n\n
Variable<\/th>Hi\u1ec7u \u1ee9ng tr\u00ean h\u1ed9i<\/th><\/tr><\/thead>
L\u1edbp bu l\u00f4ng<\/td>X\u00e1c \u0111\u1ecbnh ph\u1ea1m vi c\u01b0\u1eddng \u0111\u1ed9 cho ph\u00e9p<\/td><\/tr>
T\u00ecnh tr\u1ea1ng ch\u1ee7 \u0111\u1ec1<\/td>S\u1ee3i ch\u1ec9 b\u1ecb h\u01b0 h\u1ecfng l\u00e0m t\u0103ng ma s\u00e1t<\/td><\/tr>
L\u1edbp ph\u1ee7 b\u1ec1 m\u1eb7t<\/td>Thay \u0111\u1ed5i h\u00e0nh vi ma s\u00e1t v\u00e0 th\u1eaft ch\u1eb7t<\/td><\/tr>
Lubrication<\/td>C\u00f3 th\u1ec3 t\u0103ng \u0111\u00e1ng k\u1ec3 t\u1ea3i tr\u01b0\u1edbc \u1edf c\u00f9ng m\u1ed9t m\u00f4-men xo\u1eafn<\/td><\/tr>
\u0110\u1ed9 c\u1ee9ng c\u1ee7a v\u00f2ng \u0111\u1ec7m<\/td>\u1ea2nh h\u01b0\u1edfng \u0111\u1ebfn \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh b\u1ec1 m\u1eb7t \u1ed5 tr\u1ee5c<\/td><\/tr>
Hi\u1ec7u chu\u1ea9n c\u00f4ng c\u1ee5<\/td>Ki\u1ec3m so\u00e1t \u0111\u1ed9 l\u1eb7p l\u1ea1i<\/td><\/tr>
Tr\u00ecnh t\u1ef1 si\u1ebft ch\u1eb7t<\/td>\u1ea2nh h\u01b0\u1edfng \u0111\u1ebfn s\u1ef1 ph\u00e2n b\u1ed5 t\u1ea3i tr\u1ecdng trong c\u00e1c m\u1ed1i n\u1ed1i nhi\u1ec1u bu l\u00f4ng<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Gi\u00e1 tr\u1ecb m\u00f4-men xo\u1eafn \u0111\u01b0\u1ee3c sao ch\u00e9p t\u1eeb bi\u1ec3u \u0111\u1ed3 chung c\u00f3 th\u1ec3 kh\u00f4ng kh\u1edbp v\u1edbi c\u1ee5m th\u1ef1c t\u1ebf. \u0110i\u1ec1u n\u00e0y \u0111\u1eb7c bi\u1ec7t \u0111\u00fang \u0111\u1ed1i v\u1edbi c\u00e1c bu l\u00f4ng c\u01b0\u1eddng \u0111\u1ed9 cao \u0111\u01b0\u1ee3c tr\u00e1ng, m\u1ea1 ho\u1eb7c b\u00f4i tr\u01a1n.<\/p>\n\n\n\n

\u00dd ngh\u0129a c\u1ee7a s\u1ef1 gi\u00f2n hydro<\/h2>\n\n\n\n

T\u00ednh d\u00f2n do hydro l\u00e0 nguy c\u01a1 h\u01b0 h\u1ecfng \u1edf c\u00e1c b\u1ed9 ph\u1eadn b\u1eb1ng th\u00e9p c\u01b0\u1eddng \u0111\u1ed9 cao. Nguy\u00ean t\u1eed hydro c\u00f3 th\u1ec3 x\u00e2m nh\u1eadp v\u00e0o th\u00e9p trong qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t ho\u1eb7c x\u1eed l\u00fd b\u1ec1 m\u1eb7t. D\u01b0\u1edbi \u1ee9ng su\u1ea5t k\u00e9o, bu l\u00f4ng c\u00f3 th\u1ec3 b\u1ecb n\u1ee9t ho\u1eb7c g\u00e3y \u0111\u1ed9t ng\u1ed9t, \u0111\u00f4i khi v\u00e0i gi\u1edd ho\u1eb7c v\u00e0i ng\u00e0y sau khi l\u1eafp \u0111\u1eb7t.<\/p>\n\n\n\n

Nguy c\u01a1 n\u00e0y nghi\u00eam tr\u1ecdng h\u01a1n \u1edf c\u00e1c \u1ed1c v\u00edt c\u00f3 \u0111\u1ed9 c\u1ee9ng cao v\u00e0 \u0111\u1ed9 b\u1ec1n cao, \u0111\u1eb7c bi\u1ec7t khi li\u00ean quan \u0111\u1ebfn m\u1ea1 \u0111i\u1ec7n, l\u00e0m s\u1ea1ch b\u1eb1ng axit ho\u1eb7c t\u1ea9y r\u1eeda.<\/p>\n\n\n\n

\u0110i\u1ec1u ki\u1ec7n r\u1ee7i ro ph\u1ed5 bi\u1ebfn<\/h3>\n\n\n\n
Y\u1ebfu t\u1ed1 r\u1ee7i ro<\/th>T\u1ea1i sao n\u00f3 quan tr\u1ecdng<\/th><\/tr><\/thead>
\u0110\u1ed9 b\u1ec1n cao ho\u1eb7c \u0111\u1ed9 c\u1ee9ng cao<\/td>\u00cdt dung n\u1ea1p hydro b\u1ecb m\u1eafc k\u1eb9t<\/td><\/tr>
Electroplating<\/td>C\u00f3 th\u1ec3 gi\u1edbi thi\u1ec7u hydro trong qu\u00e1 tr\u00ecnh ch\u1ebf bi\u1ebfn<\/td><\/tr>
T\u1ea9y axit<\/td>C\u00f3 th\u1ec3 l\u00e0m t\u0103ng s\u1ef1 h\u1ea5p th\u1ee5 hydro<\/td><\/tr>
T\u1ea3i tr\u01b0\u1edbc cao<\/td>T\u0103ng \u1ee9ng su\u1ea5t k\u00e9o trong bu l\u00f4ng<\/td><\/tr>
L\u1ed7i c\u00e0i \u0111\u1eb7t b\u1ecb tr\u00ec ho\u00e3n<\/td>Th\u1ea5t b\u1ea1i c\u00f3 th\u1ec3 kh\u00f4ng x\u1ea3y ra ngay l\u1eadp t\u1ee9c<\/td><\/tr>
Ki\u1ec3m so\u00e1t n\u01b0\u1edbng k\u00e9m<\/td>Hydro c\u00f3 th\u1ec3 kh\u00f4ng \u0111\u01b0\u1ee3c gi\u1ea3i ph\u00f3ng \u0111\u00fang c\u00e1ch<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

\u0110\u1ed9 gi\u00f2n hydro r\u1ea5t kh\u00f3 x\u00e1c \u0111\u1ecbnh ch\u1ec9 b\u1eb1ng c\u00e1ch ki\u1ec3m tra tr\u1ef1c quan. M\u1ed9t chi\u1ebfc bu-l\u00f4ng c\u00f3 th\u1ec3 tr\u00f4ng b\u00ecnh th\u01b0\u1eddng nh\u01b0ng v\u1eabn \u1ea9n ch\u1ee9a nh\u1eefng r\u1ee7i ro.<\/p>\n\n\n\n

M\u1ed1i t\u01b0\u01a1ng t\u00e1c gi\u1eefa r\u1ee7i ro m\u00f4-men xo\u1eafn v\u00e0 \u0111\u1ed9 gi\u00f2n<\/h2>\n\n\n\n

Vi\u1ec7c si\u1ebft ch\u1eb7t kh\u00f4ng t\u1ef1 t\u1ea1o ra hi\u1ec7n t\u01b0\u1ee3ng gi\u00f2n do hydro. Tuy nhi\u00ean, vi\u1ec7c th\u1eaft ch\u1eb7t s\u1ebd g\u00e2y ra \u1ee9ng su\u1ea5t k\u00e9o. N\u1ebfu bu l\u00f4ng c\u01b0\u1eddng \u0111\u1ed9 cao \u0111\u00e3 ch\u1ee9a hydro h\u1ea5p th\u1ee5, t\u1ea3i tr\u01b0\u1edbc cao c\u00f3 th\u1ec3 l\u00e0m t\u0103ng kh\u1ea3 n\u0103ng b\u1ecb n\u1ee9t ch\u1eadm.<\/p>\n\n\n\n

\u0110\u00e2y l\u00e0 l\u00fd do t\u1ea1i sao r\u1ee7i ro th\u01b0\u1eddng \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n sau khi l\u1eafp r\u00e1p. Bu l\u00f4ng v\u01b0\u1ee3t qua ki\u1ec3m tra k\u00edch th\u01b0\u1edbc. L\u1edbp ph\u1ee7 c\u00f3 v\u1ebb ch\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c. Qu\u00e1 tr\u00ecnh c\u00e0i \u0111\u1eb7t \u0111\u00e3 ho\u00e0n t\u1ea5t. Sau \u0111\u00f3, bu-l\u00f4ng b\u1ecb g\u00e3y sau \u0111\u00f3 d\u01b0\u1edbi \u00e1p l\u1ef1c k\u00e9o d\u00e0i.<\/p>\n\n\n\n

V\u00ed d\u1ee5 th\u1ef1c t\u1ebf<\/h3>\n\n\n\n

M\u1ed9t ng\u01b0\u1eddi mua \u0111\u1eb7t h\u00e0ng c\u00e1c lo\u1ea1i bu l\u00f4ng m\u1ea1 k\u1ebdm \u0111\u1ec3 l\u1eafp r\u00e1p ch\u1ecbu t\u1ea3i cao. C\u00e1c b\u1ed9 ph\u1eadn tr\u00f4ng s\u1ea1ch s\u1ebd. C\u00e1c k\u00edch th\u01b0\u1edbc l\u00e0 ch\u00ednh x\u00e1c. Bu l\u00f4ng \u0111\u01b0\u1ee3c si\u1ebft ch\u1eb7t \u0111\u1ebfn gi\u00e1 tr\u1ecb m\u00f4-men xo\u1eafn cao. M\u1ed9t s\u1ed1 bu l\u00f4ng b\u1ecb h\u1ecfng sau khi l\u1eafp \u0111\u1eb7t. (12.9)<\/p>\n\n\n\n

Nguy\u00ean nh\u00e2n g\u1ed1c r\u1ec5 c\u00f3 th\u1ec3 kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t v\u1ea5n \u0111\u1ec1 duy nh\u1ea5t. N\u00f3 c\u00f3 th\u1ec3 l\u00e0 s\u1ef1 k\u1ebft h\u1ee3p c\u1ee7a \u0111\u1ed9 c\u1ee9ng cao, quy tr\u00ecnh m\u1ea1 \u0111i\u1ec7n, n\u01b0\u1edbng kh\u00f4ng \u0111\u1ee7, t\u1ea3i tr\u01b0\u1edbc qu\u00e1 m\u1ee9c ho\u1eb7c \u1ee9ng d\u1ee5ng ph\u00f9 h\u1ee3p h\u01a1n v\u1edbi h\u1ec7 th\u1ed1ng ph\u1ee7 kh\u00e1c.<\/p>\n\n\n\n

\u0110\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng y\u00eau c\u1ea7u b\u1ea3o v\u1ec7 ch\u1ed1ng \u0103n m\u00f2n, ng\u01b0\u1eddi mua n\u00ean so s\u00e1nh \u1ed1c v\u00edt tr\u00e1ng<\/a> v\u00e0 x\u00e1c nh\u1eadn xem l\u1edbp ho\u00e0n thi\u1ec7n \u0111\u00e3 ch\u1ecdn c\u00f3 ph\u00f9 h\u1ee3p v\u1edbi bu l\u00f4ng c\u01b0\u1eddng \u0111\u1ed9 cao hay kh\u00f4ng.<\/p>\n\n\n\n

L\u1ef1a ch\u1ecdn \u0111\u1ed9 ho\u00e0n thi\u1ec7n b\u1ec1 m\u1eb7t cho bu l\u00f4ng c\u01b0\u1eddng \u0111\u1ed9 cao<\/h2>\n\n\n\n

Kh\u00f4ng ph\u1ea3i m\u1ecdi l\u1edbp ph\u1ee7 \u0111\u1ec1u ph\u00f9 h\u1ee3p v\u1edbi m\u1ecdi bu l\u00f4ng c\u01b0\u1eddng \u0111\u1ed9 cao. B\u1ea3o v\u1ec7 ch\u1ed1ng \u0103n m\u00f2n ph\u1ea3i \u0111\u01b0\u1ee3c c\u00e2n b\u1eb1ng v\u1edbi r\u1ee7i ro c\u01a1 h\u1ecdc.<\/p>\n\n\n\n

Ho\u00e0n thi\u1ec7n \/ L\u1edbp ph\u1ee7<\/th>S\u1eed d\u1ee5ng \u0111i\u1ec3n h\u00ecnh<\/th>M\u1ed1i quan t\u00e2m c\u1ee7a ng\u01b0\u1eddi mua<\/th><\/tr><\/thead>
S\u01a1n tr\u01a1n\/d\u1ea7u<\/td>M\u00f4i tr\u01b0\u1eddng trong nh\u00e0 ho\u1eb7c \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t<\/td>B\u1ea3o v\u1ec7 ch\u1ed1ng \u0103n m\u00f2n h\u1ea1n ch\u1ebf<\/td><\/tr>
M\u1ea1 k\u1ebdm<\/td>B\u1ea3o v\u1ec7 ch\u1ed1ng \u0103n m\u00f2n chung<\/td>C\u1ea7n ki\u1ec3m so\u00e1t \u0111\u1ed9 gi\u00f2n hydro<\/td><\/tr>
M\u1ea1 k\u1ebdm nh\u00fang n\u00f3ng<\/td>K\u1ebft c\u1ea5u th\u00e9p ngo\u00e0i tr\u1eddi<\/td>\u0110\u1ed9 v\u1eeba v\u1eb7n c\u1ee7a ren v\u00e0 \u0111\u1ed9 d\u00e0y l\u1edbp ph\u1ee7<\/td><\/tr>
L\u1edbp m\u1ea1 k\u1ebdm\/l\u1edbp ph\u1ee7 d\u1ea1ng Dacromet<\/td>Ch\u1ed1ng \u0103n m\u00f2n cho c\u00e1c b\u1ed9 ph\u1eadn c\u00f3 \u0111\u1ed9 b\u1ec1n cao<\/td>Ki\u1ec3m so\u00e1t ma s\u00e1t v\u00e0 \u0111\u1eb7c \u0111i\u1ec3m k\u1ef9 thu\u1eadt<\/td><\/tr>
Oxit \u0111en<\/td>Ngo\u1ea1i h\u00ecnh v\u00e0 b\u1ea3o v\u1ec7 \u00e1nh s\u00e1ng<\/td>Kh\u00f4ng th\u00edch h\u1ee3p cho s\u1ef1 \u0103n m\u00f2n kh\u1eafc nghi\u1ec7t<\/td><\/tr>
PTFE l\u1edbp ph\u1ee7<\/td>\u1ee8ng d\u1ee5ng h\u00f3a h\u1ecdc ho\u1eb7c m\u1eb7t b\u00edch<\/td>Gi\u00e1 tr\u1ecb m\u00f4-men xo\u1eafn kh\u00e1c nhau \u0111\u00e1ng k\u1ec3<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

\u0110\u1ed1i v\u1edbi m\u1ed9t s\u1ed1 d\u1ef1 \u00e1n ngo\u00e0i tr\u1eddi ho\u1eb7c c\u00f4ng nghi\u1ec7p, vi\u1ec7c l\u1ef1a ch\u1ecdn l\u1edbp ph\u1ee7 c\u00f3 th\u1ec3 quan tr\u1ecdng h\u01a1n vi\u1ec7c ch\u1ecdn lo\u1ea1i bu l\u00f4ng cao nh\u1ea5t c\u00f3 th\u1ec3.<\/p>\n\n\n\n

Ki\u1ec3m so\u00e1t c\u00e0i \u0111\u1eb7t gi\u00fap gi\u1ea3m r\u1ee7i ro<\/h2>\n\n\n\n

M\u1ed9t quy tr\u00ecnh th\u1eaft ch\u1eb7t t\u1ed1t \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t, ghi l\u1ea1i v\u00e0 c\u00f3 th\u1ec3 l\u1eb7p l\u1ea1i.<\/p>\n\n\n\n

Th\u1ef1c h\u00e0nh c\u00e0i \u0111\u1eb7t ch\u00ednh<\/h3>\n\n\n\n
    \n
  1. S\u1eed d\u1ee5ng m\u00f4-men xo\u1eafn, ph\u01b0\u01a1ng ph\u00e1p c\u0103ng ho\u1eb7c si\u1ebft ch\u1eb7t \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh.<\/li>\n\n\n\n
  2. X\u00e1c nh\u1eadn xem gi\u00e1 tr\u1ecb m\u00f4-men xo\u1eafn c\u00f3 gi\u1ea3 \u0111\u1ecbnh ren kh\u00f4 hay \u0111\u01b0\u1ee3c b\u00f4i tr\u01a1n hay kh\u00f4ng.<\/li>\n\n\n\n
  3. S\u1eed d\u1ee5ng c\u00e1c c\u00f4ng c\u1ee5 m\u00f4-men xo\u1eafn \u0111\u00e3 hi\u1ec7u ch\u1ec9nh.<\/li>\n\n\n\n
  4. Tr\u00e1nh c\u00e1c s\u1ee3i b\u1ecb h\u01b0 h\u1ecfng ho\u1eb7c b\u1ecb \u00f4 nhi\u1ec5m.<\/li>\n\n\n\n
  5. S\u1eed d\u1ee5ng \u0111\u00fang lo\u1ea1i \u0111ai \u1ed1c v\u00e0 \u0111\u1ed9 c\u1ee9ng c\u1ee7a v\u00f2ng \u0111\u1ec7m.<\/li>\n\n\n\n
  6. Th\u1ef1c hi\u1ec7n theo tr\u00ecnh t\u1ef1 th\u1eaft ch\u1eb7t c\u1ea7n thi\u1ebft.<\/li>\n\n\n\n
  7. Kh\u00f4ng s\u1eed d\u1ee5ng l\u1ea1i \u1ed1c v\u00edt c\u00f3 \u0111\u1ed9 b\u1ec1n cao tr\u1eeb khi d\u1ef1 \u00e1n cho ph\u00e9p.<\/li>\n\n\n\n
  8. Gi\u1eef kh\u1ea3 n\u0103ng truy xu\u1ea5t ngu\u1ed3n g\u1ed1c h\u00e0ng lo\u1ea1t cho t\u1ea5t c\u1ea3 c\u00e1c kh\u1edbp quan tr\u1ecdng.<\/li>\n<\/ol>\n\n\n\n

    \u0110\u1ec3 l\u1eafp r\u00e1p ho\u00e0n ch\u1ec9nh, ng\u01b0\u1eddi mua n\u00ean xem x\u00e9t c\u00e1c bu l\u00f4ng, \u0111ai \u1ed1c, v\u00f2ng \u0111\u1ec7m v\u00e0 c\u00e1c b\u1ed9 ph\u1eadn li\u00ean quan ph\u00f9 h\u1ee3p. s\u1ea3n ph\u1ea9m chi ti\u1ebft si\u1ebft ch\u1eb7t<\/a> tr\u01b0\u1edbc khi x\u00e1c nh\u1eadn \u0111\u01a1n h\u00e0ng.<\/p>\n\n\n\n

    RFQ Y\u00eau c\u1ea7u \u0111\u1ed1i v\u1edbi ng\u01b0\u1eddi mua<\/h2>\n\n\n\n

    M\u1ed9t bu l\u00f4ng c\u01b0\u1eddng \u0111\u1ed9 cao kh\u00f4ng ch\u1ec9 n\u00ean bao g\u1ed3m k\u00edch th\u01b0\u1edbc v\u00e0 s\u1ed1 l\u01b0\u1ee3ng. (RFQ)<\/p>\n\n\n\n

    RFQ M\u1ee5c<\/th>T\u1ea1i sao n\u00f3 quan tr\u1ecdng<\/th><\/tr><\/thead>
    Ti\u00eau chu\u1ea9n v\u00e0 c\u1ea5p \u0111\u1ed9<\/td>X\u00e1c \u0111\u1ecbnh c\u00e1c y\u00eau c\u1ea7u c\u01a1 h\u1ecdc<\/td><\/tr>
    V\u1eadt li\u1ec7u<\/td>Ki\u1ec3m so\u00e1t s\u1ee9c m\u1ea1nh v\u00e0 x\u1eed l\u00fd nhi\u1ec7t<\/td><\/tr>
    B\u1ec1 m\u1eb7t ho\u00e0n thi\u1ec7n<\/td>\u1ea2nh h\u01b0\u1edfng \u0111\u1ebfn nguy c\u01a1 \u0103n m\u00f2n v\u00e0 gi\u00f2n<\/td><\/tr>
    Y\u00eau c\u1ea7u m\u00f4-men xo\u1eafn ho\u1eb7c t\u1ea3i tr\u01b0\u1edbc<\/td>Gi\u00fap \u0111\u00e1nh gi\u00e1 t\u00ecnh tr\u1ea1ng l\u1eafp r\u00e1p<\/td><\/tr>
    T\u00ecnh tr\u1ea1ng b\u00f4i tr\u01a1n<\/td>Thay \u0111\u1ed5i k\u1ebft qu\u1ea3 t\u1ea3i tr\u01b0\u1edbc<\/td><\/tr>
    T\u00e0i li\u1ec7u ki\u1ec3m tra<\/td>H\u1ed7 tr\u1ee3 x\u00e1c minh ch\u1ea5t l\u01b0\u1ee3ng<\/td><\/tr>
    C\u00e1c lo\u1ea1i h\u1ea1t v\u00e0 v\u00f2ng \u0111\u1ec7m ph\u00f9 h\u1ee3p<\/td>Ng\u0103n ch\u1eb7n vi\u1ec7c l\u1eafp r\u00e1p kh\u00f4ng kh\u1edbp<\/td><\/tr>
    M\u00f4i tr\u01b0\u1eddng \u1ee9ng d\u1ee5ng<\/td>Gi\u00fap nh\u00e0 cung c\u1ea5p \u0111\u1ec1 xu\u1ea5t l\u1edbp ph\u1ee7 ph\u00f9 h\u1ee3p<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

    Ng\u01b0\u1eddi mua c\u0169ng c\u00f3 th\u1ec3 y\u00eau c\u1ea7u gi\u1ea5y ch\u1ee9ng nh\u1eadn ki\u1ec3m tra v\u1eadt li\u1ec7u, b\u00e1o c\u00e1o \u0111\u1ed9 c\u1ee9ng, b\u00e1o c\u00e1o ki\u1ec3m tra l\u1edbp ph\u1ee7 v\u00e0 h\u1ed3 s\u01a1 n\u01b0\u1edbng n\u1ebfu c\u00f3.<\/p>\n\n\n\n

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

    Kh\u00f4ng n\u00ean mua bu l\u00f4ng c\u01b0\u1eddng \u0111\u1ed9 cao nh\u01b0 nh\u1eefng b\u1ed9 ph\u1eadn h\u00e0ng h\u00f3a \u0111\u01a1n gi\u1ea3n khi m\u1ed1i n\u1ed1i ch\u1ecbu t\u1ea3i tr\u1ecdng l\u1edbn. Ki\u1ec3m so\u00e1t m\u00f4-men xo\u1eafn v\u00e0 nguy c\u01a1 gi\u00f2n do hydro ph\u1ea3i \u0111\u01b0\u1ee3c xem x\u00e9t c\u00f9ng v\u1edbi v\u1eadt li\u1ec7u, c\u1ea5p \u0111\u1ed9, x\u1eed l\u00fd nhi\u1ec7t, l\u1edbp ph\u1ee7 v\u00e0 ph\u01b0\u01a1ng ph\u00e1p l\u1eafp \u0111\u1eb7t.<\/p>\n\n\n\n

    C\u00e1ch ti\u1ebfp c\u1eadn an to\u00e0n nh\u1ea5t l\u00e0 th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt r\u00f5 r\u00e0ng tr\u01b0\u1edbc khi s\u1ea3n xu\u1ea5t. X\u00e1c nh\u1eadn c\u1ea5p \u0111\u1ed9 bu l\u00f4ng, ph\u01b0\u01a1ng ph\u00e1p ph\u1ee7, t\u00ecnh tr\u1ea1ng si\u1ebft ch\u1eb7t, y\u00eau c\u1ea7u ki\u1ec3m tra v\u00e0 c\u00e1c b\u1ed9 ph\u1eadn l\u1eafp r\u00e1p ph\u00f9 h\u1ee3p \u1edf giai \u0111o\u1ea1n RFQ.<\/p>\n\n\n\n

    N\u1ebfu \u1ee9ng d\u1ee5ng y\u00eau c\u1ea7u c\u01b0\u1eddng \u0111\u1ed9, l\u1edbp ph\u1ee7 ho\u1eb7c k\u00edch th\u01b0\u1edbc kh\u00e1c th\u01b0\u1eddng, \u1ed1c v\u00edt phi ti\u00eau chu\u1ea9n t\u00f9y ch\u1ec9nh<\/a> c\u00f3 th\u1ec3 cung c\u1ea5p kh\u1ea3 n\u0103ng ki\u1ec3m so\u00e1t t\u1ed1t h\u01a1n so v\u1edbi vi\u1ec7c bu\u1ed9c m\u1ed9t b\u1ed9 ph\u1eadn ti\u00eau chu\u1ea9n v\u00e0o kh\u1edbp quan tr\u1ecdng.<\/p>","protected":false},"excerpt":{"rendered":"

    High-strength bolts are often selected because the joint must carry serious load. That is common in steel structures, heavy machinery, wind power, automotive systems, lifting equipment, and pressure-related assemblies. But higher strength also brings tighter control requirements. Two issues deserve special attention: tightening torque and hydrogen embrittlement risk. They are not the same problem, but […]<\/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":[491],"class_list":["post-6492","post","type-post","status-publish","format-standard","hentry","category-fastener-knowledge-library","tag-torque-preload-tightening"],"acf":[],"_links":{"self":[{"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/posts\/6492","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=6492"}],"version-history":[{"count":1,"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/posts\/6492\/revisions"}],"predecessor-version":[{"id":6493,"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/posts\/6492\/revisions\/6493"}],"wp:attachment":[{"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/media?parent=6492"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/categories?post=6492"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/xzfastener.com\/vi\/wp-json\/wp\/v2\/tags?post=6492"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}