{"id":5642,"date":"2025-12-23T03:02:08","date_gmt":"2025-12-23T03:02:08","guid":{"rendered":"https:\/\/korea-transmission.com\/?p=5642"},"modified":"2025-12-23T03:02:08","modified_gmt":"2025-12-23T03:02:08","slug":"gb-t-5779-1-2000-fastener-surface-defects-guide","status":"publish","type":"post","link":"https:\/\/korea-transmission.com\/vi\/blog\/gb-t-5779-1-2000-fastener-surface-defects-guide\/","title":{"rendered":"GB\/T 5779.1-2000: H\u01b0\u1edbng d\u1eabn v\u1ec1 c\u00e1c khuy\u1ebft t\u1eadt b\u1ec1 m\u1eb7t c\u1ee7a \u1ed1c v\u00edt"},"content":{"rendered":"
\n

Gi\u1edbi thi\u1ec7u v\u1ec1 Ti\u00eau chu\u1ea9n GB\/T 5779.1-2000<\/h2>\n

Ti\u00eau chu\u1ea9n GB\/T 5779.1-2000 quy \u0111\u1ecbnh c\u00e1c y\u00eau c\u1ea7u chung \u0111\u1ed1i v\u1edbi c\u00e1c khuy\u1ebft t\u1eadt b\u1ec1 m\u1eb7t tr\u00ean c\u00e1c chi ti\u1ebft l\u1eafp gh\u00e9p, \u0111\u1eb7c bi\u1ec7t l\u00e0 bu l\u00f4ng, \u1ed1c v\u00edt v\u00e0 \u0111inh t\u00e1n. Ti\u00eau chu\u1ea9n n\u00e0y r\u1ea5t c\u1ea7n thi\u1ebft \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng v\u00e0 \u0111\u1ed9 tin c\u1eady c\u1ee7a c\u00e1c chi ti\u1ebft l\u1eafp gh\u00e9p c\u01a1 kh\u00ed trong nhi\u1ec1u ng\u00e0nh c\u00f4ng nghi\u1ec7p kh\u00e1c nhau, bao g\u1ed3m \u00f4 t\u00f4, h\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5, x\u00e2y d\u1ef1ng v\u00e0 s\u1ea3n xu\u1ea5t m\u00e1y m\u00f3c. N\u00f3 x\u00e1c \u0111\u1ecbnh c\u00e1c gi\u1edbi h\u1ea1n ch\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c \u0111\u1ed1i v\u1edbi c\u00e1c khuy\u1ebft t\u1eadt b\u1ec1 m\u1eb7t c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn t\u00ednh to\u00e0n v\u1eb9n c\u1ea5u tr\u00fac, hi\u1ec7u su\u1ea5t ho\u1eb7c an to\u00e0n. B\u1eb1ng c\u00e1ch tu\u00e2n th\u1ee7 ti\u00eau chu\u1ea9n n\u00e0y, c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t c\u00f3 th\u1ec3 duy tr\u00ec t\u00ednh nh\u1ea5t qu\u00e1n trong s\u1ea3n xu\u1ea5t, trong khi ng\u01b0\u1eddi s\u1eed d\u1ee5ng \u0111\u01b0\u1ee3c h\u01b0\u1edfng l\u1ee3i t\u1eeb h\u00e0nh vi l\u1eafp gh\u00e9p c\u00f3 th\u1ec3 d\u1ef1 \u0111o\u00e1n \u0111\u01b0\u1ee3c d\u01b0\u1edbi t\u1ea3i tr\u1ecdng.<\/p>\n

C\u00e1c khuy\u1ebft t\u1eadt b\u1ec1 m\u1eb7t tr\u00ean c\u00e1c chi ti\u1ebft l\u1eafp gh\u00e9p ph\u00e1t sinh t\u1eeb c\u00e1c quy tr\u00ecnh s\u1ea3n xu\u1ea5t nh\u01b0 r\u00e8n, x\u1eed l\u00fd nhi\u1ec7t v\u00e0 gia c\u00f4ng. N\u1ebfu kh\u00f4ng \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t, nh\u1eefng khuy\u1ebft t\u1eadt n\u00e0y c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn h\u1ecfng h\u00f3c s\u1edbm th\u00f4ng qua c\u00e1c c\u01a1 ch\u1ebf nh\u01b0 t\u1eadp trung \u1ee9ng su\u1ea5t ho\u1eb7c kh\u1edfi ph\u00e1t \u0103n m\u00f2n. Ti\u00eau chu\u1ea9n n\u00e0y ph\u00e2n lo\u1ea1i c\u00e1c khuy\u1ebft t\u1eadt th\u00e0nh c\u00e1c lo\u1ea1i nh\u01b0 v\u1ebft n\u1ee9t, l\u1ed7 r\u1ed7ng, n\u1ebfp g\u1ea5p v\u00e0 c\u00e1c lo\u1ea1i kh\u00e1c, cung c\u1ea5p c\u00e1c ti\u00eau ch\u00ed chi ti\u1ebft \u0111\u1ec3 nh\u1eadn di\u1ec7n v\u00e0 ch\u1ea5p nh\u1eadn. Ti\u00eau chu\u1ea9n nh\u1ea5n m\u1ea1nh c\u00e1c ph\u01b0\u01a1ng ph\u00e1p ki\u1ec3m tra b\u1eb1ng m\u1eaft th\u01b0\u1eddng v\u00e0 kh\u00f4ng ph\u00e1 h\u1ee7y \u0111\u1ec3 ph\u00e1t hi\u1ec7n c\u00e1c v\u1ea5n \u0111\u1ec1 m\u00e0 kh\u00f4ng l\u00e0m h\u1ecfng c\u00e1c b\u1ed9 ph\u1eadn.<\/p>\n

Tr\u00ean th\u1ef1c t\u1ebf, vi\u1ec7c tu\u00e2n th\u1ee7 ti\u00eau chu\u1ea9n GB\/T 5779.1-2000 \u0111\u00f2i h\u1ecfi ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng nghi\u00eam ng\u1eb7t \u1edf m\u1ecdi giai \u0111o\u1ea1n s\u1ea3n xu\u1ea5t. V\u00ed d\u1ee5, vi\u1ec7c l\u1ef1a ch\u1ecdn nguy\u00ean li\u1ec7u th\u00f4 r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 gi\u1ea3m thi\u1ec3u c\u00e1c khuy\u1ebft t\u1eadt v\u1ed1n c\u00f3, trong khi c\u00e1c th\u00f4ng s\u1ed1 quy tr\u00ecnh trong qu\u00e1 tr\u00ecnh r\u00e8n v\u00e0 x\u1eed l\u00fd nhi\u1ec7t ph\u1ea3i \u0111\u01b0\u1ee3c t\u1ed1i \u01b0u h\u00f3a \u0111\u1ec3 ng\u0103n ng\u1eeba c\u00e1c khuy\u1ebft t\u1eadt ph\u00e1t sinh. Ti\u00eau chu\u1ea9n n\u00e0y c\u0169ng t\u00edch h\u1ee3p v\u1edbi c\u00e1c ti\u00eau chu\u1ea9n kh\u00e1c, ch\u1eb3ng h\u1ea1n nh\u01b0 GB\/T 90 v\u1ec1 l\u1ea5y m\u1eabu ch\u1ea5p nh\u1eadn, \u0111\u1ea3m b\u1ea3o c\u00e1ch ti\u1ebfp c\u1eadn to\u00e0n di\u1ec7n \u0111\u1ed1i v\u1edbi vi\u1ec7c \u0111\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng.<\/p>\n

Nh\u1eefng l\u1ee3i \u00edch ch\u00ednh c\u1ee7a vi\u1ec7c tu\u00e2n th\u1ee7 ti\u00eau chu\u1ea9n n\u00e0y bao g\u1ed3m t\u0103ng c\u01b0\u1eddng \u0111\u1ed9 b\u1ec1n s\u1ea3n ph\u1ea9m, gi\u1ea3m t\u1ef7 l\u1ec7 s\u1ea3n ph\u1ea9m l\u1ed7i tr\u00ean d\u00e2y chuy\u1ec1n l\u1eafp r\u00e1p v\u00e0 tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n qu\u1ed1c t\u1ebf t\u01b0\u01a1ng \u0111\u01b0\u01a1ng nh\u01b0 ISO 6157-1. C\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t n\u00ean \u0111\u00e0o t\u1ea1o nh\u00e2n vi\u00ean v\u1ec1 nh\u1eadn di\u1ec7n l\u1ed7i, s\u1eed d\u1ee5ng c\u00e1c c\u00f4ng c\u1ee5 ki\u1ec3m tra ph\u00f3ng \u0111\u1ea1i khi c\u1ea7n thi\u1ebft. \u0110\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng c\u00f3 t\u00ednh r\u1ee7i ro cao, ch\u1eb3ng h\u1ea1n nh\u01b0 trong c\u00e1c b\u00ecnh ch\u1ecbu \u00e1p l\u1ef1c ho\u1eb7c m\u00e1y bay, vi\u1ec7c v\u01b0\u1ee3t qu\u00e1 gi\u1edbi h\u1ea1n c\u1ee7a ti\u00eau chu\u1ea9n c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c khuy\u1ebfn kh\u00edch th\u00f4ng qua c\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt t\u00f9y ch\u1ec9nh.<\/p>\n

Nh\u00ecn chung, ti\u00eau chu\u1ea9n GB\/T 5779.1-2000 th\u00fac \u0111\u1ea9y c\u00e1c th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t trong s\u1ea3n xu\u1ea5t \u1ed1c v\u00edt, khuy\u1ebfn kh\u00edch s\u1ef1 \u0111\u1ed5i m\u1edbi v\u1ec1 v\u1eadt li\u1ec7u v\u00e0 quy tr\u00ecnh \u0111\u1ed3ng th\u1eddi b\u1ea3o \u0111\u1ea3m an to\u00e0n cho ng\u01b0\u1eddi s\u1eed d\u1ee5ng cu\u1ed1i c\u00f9ng. Ti\u00eau chu\u1ea9n n\u00e0y m\u00f4 t\u1ea3 chi ti\u1ebft c\u00e1c khuy\u1ebft t\u1eadt, v\u1edbi c\u00e1c h\u00ecnh \u1ea3nh minh h\u1ecda v\u00e0 gi\u1edbi h\u1ea1n \u0111\u1ecbnh l\u01b0\u1ee3ng g\u1eafn li\u1ec1n v\u1edbi \u0111\u01b0\u1eddng k\u00ednh ren danh ngh\u0129a, bi\u1ebfn n\u00f3 th\u00e0nh m\u1ed9t c\u00f4ng c\u1ee5 thi\u1ebft th\u1ef1c cho c\u00e1c k\u1ef9 s\u01b0 v\u00e0 thanh tra ch\u1ea5t l\u01b0\u1ee3ng. Ph\u1ea7n gi\u1edbi thi\u1ec7u n\u00e0y \u0111\u1eb7t n\u1ec1n t\u1ea3ng cho vi\u1ec7c hi\u1ec3u c\u00e1c lo\u1ea1i khuy\u1ebft t\u1eadt c\u1ee5 th\u1ec3 \u0111\u01b0\u1ee3c n\u00eau d\u01b0\u1edbi \u0111\u00e2y, \u0111\u1ea3m b\u1ea3o ng\u01b0\u1eddi \u0111\u1ecdc c\u00f3 th\u1ec3 \u00e1p d\u1ee5ng ti\u00eau chu\u1ea9n m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 trong c\u00e1c t\u00ecnh hu\u1ed1ng th\u1ef1c t\u1ebf.<\/p>\n

C\u00e1c lo\u1ea1i khuy\u1ebft t\u1eadt b\u1ec1 m\u1eb7t, nguy\u00ean nh\u00e2n, h\u00ecnh th\u00e1i v\u00e0 gi\u1edbi h\u1ea1n c\u1ee7a ch\u00fang.<\/h2>\n

V\u1ebft n\u1ee9t<\/h3>\n

V\u1ebft n\u1ee9t \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a l\u00e0 nh\u1eefng v\u1ebft g\u00e3y r\u00f5 r\u00e0ng d\u1ecdc theo ranh gi\u1edbi h\u1ea1t kim lo\u1ea1i ho\u1eb7c xuy\u00ean qua c\u00e1c h\u1ea1t, c\u00f3 th\u1ec3 ch\u1ee9a c\u00e1c t\u1ea1p ch\u1ea5t. Ch\u00fang th\u01b0\u1eddng l\u00e0 k\u1ebft qu\u1ea3 c\u1ee7a \u1ee9ng su\u1ea5t qu\u00e1 m\u1ee9c trong qu\u00e1 tr\u00ecnh r\u00e8n, t\u1ea1o h\u00ecnh ho\u1eb7c x\u1eed l\u00fd nhi\u1ec7t, ho\u1eb7c c\u00f3 th\u1ec3 \u0111\u00e3 t\u1ed3n t\u1ea1i s\u1eb5n trong nguy\u00ean li\u1ec7u th\u00f4. Khi nung n\u00f3ng l\u1ea1i, c\u00e1c v\u1ebft n\u1ee9t th\u01b0\u1eddng b\u1ecb \u0111\u1ed5i m\u00e0u do l\u1edbp oxit b\u1ecb bong tr\u00f3c.<\/p>\n

N\u1ee9t do t\u00f4i luy\u1ec7n<\/h4>\n

C\u00e1c v\u1ebft n\u1ee9t do t\u00f4i luy\u1ec7n x\u1ea3y ra trong qu\u00e1 tr\u00ecnh x\u1eed l\u00fd nhi\u1ec7t do \u1ee9ng su\u1ea5t v\u00e0 bi\u1ebfn d\u1ea1ng nhi\u1ec7t cao. Ch\u00fang xu\u1ea5t hi\u1ec7n d\u01b0\u1edbi d\u1ea1ng c\u00e1c \u0111\u01b0\u1eddng kh\u00f4ng \u0111\u1ec1u, giao nhau m\u00e0 kh\u00f4ng c\u00f3 h\u01b0\u1edbng nh\u1ea5t \u0111\u1ecbnh tr\u00ean b\u1ec1 m\u1eb7t c\u1ee7a chi ti\u1ebft l\u1eafp gh\u00e9p.<\/p>\n

\n\n\n\n\n
G\u00e2y ra<\/th>\nTrong qu\u00e1 tr\u00ecnh x\u1eed l\u00fd nhi\u1ec7t, \u1ee9ng su\u1ea5t v\u00e0 bi\u1ebfn d\u1ea1ng nhi\u1ec7t qu\u00e1 m\u1ee9c d\u1eabn \u0111\u1ebfn c\u00e1c v\u1ebft n\u1ee9t do t\u00f4i luy\u1ec7n. C\u00e1c v\u1ebft n\u1ee9t n\u00e0y kh\u00f4ng \u0111\u1ec1u v\u00e0 giao nhau m\u00e0 kh\u00f4ng theo m\u1ed9t h\u01b0\u1edbng nh\u1ea5t \u0111\u1ecbnh tr\u00ean b\u1ec1 m\u1eb7t.<\/th>\n<\/tr>\n
Gi\u1edbi h\u1ea1n<\/td>\nKh\u00f4ng \u0111\u01b0\u1ee3c ph\u00e9p c\u00f3 b\u1ea5t k\u1ef3 v\u1ebft n\u1ee9t n\u00e0o do qu\u00e1 tr\u00ecnh t\u00f4i luy\u1ec7n, d\u00f9 s\u00e2u, d\u00e0i hay \u1edf b\u1ea5t k\u1ef3 v\u1ecb tr\u00ed n\u00e0o.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

C\u00e1c v\u1ebft n\u1ee9t do t\u00f4i luy\u1ec7n \u0111\u1eb7c bi\u1ec7t nguy hi\u1ec3m v\u00ec ch\u00fang c\u00f3 th\u1ec3 lan r\u1ed9ng d\u01b0\u1edbi t\u1ea3i tr\u1ecdng, d\u1eabn \u0111\u1ebfn h\u1ecfng h\u00f3c nghi\u00eam tr\u1ecdng. Vi\u1ec7c ph\u00f2ng ng\u1eeba bao g\u1ed3m ki\u1ec3m so\u00e1t t\u1ed1c \u0111\u1ed9 l\u00e0m ngu\u1ed9i v\u00e0 s\u1eed d\u1ee5ng m\u00f4i tr\u01b0\u1eddng t\u00f4i luy\u1ec7n th\u00edch h\u1ee3p. Trong th\u00e9p cacbon, vi\u1ec7c l\u00e0m ngu\u1ed9i nhanh t\u1eeb nhi\u1ec7t \u0111\u1ed9 austenit h\u00f3a l\u00e0m tr\u1ea7m tr\u1ecdng th\u00eam v\u1ea5n \u0111\u1ec1 n\u00e0y, v\u00ec v\u1eady c\u00e1c nguy\u00ean t\u1ed1 h\u1ee3p kim nh\u01b0 crom ho\u1eb7c molypden \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 c\u1ea3i thi\u1ec7n kh\u1ea3 n\u0103ng t\u00f4i c\u1ee9ng m\u00e0 kh\u00f4ng g\u00e2y ra \u1ee9ng su\u1ea5t qu\u00e1 m\u1ee9c. Vi\u1ec7c ki\u1ec3m tra th\u01b0\u1eddng y\u00eau c\u1ea7u ki\u1ec3m tra b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p t\u1eeb t\u00ednh \u0111\u1ec3 ph\u00e1t hi\u1ec7n c\u00e1c v\u1ebft n\u1ee9t d\u01b0\u1edbi b\u1ec1 m\u1eb7t. Gi\u1edbi h\u1ea1n r\u1ea5t nghi\u00eam ng\u1eb7t v\u00ec ngay c\u1ea3 nh\u1eefng v\u1ebft n\u1ee9t nh\u1ecf do t\u00f4i luy\u1ec7n c\u0169ng c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m tu\u1ed5i th\u1ecd m\u1ecfi l\u00ean \u0111\u1ebfn 50% trong c\u00e1c \u1ee9ng d\u1ee5ng t\u1ea3i tr\u1ecdng chu k\u1ef3.<\/p>\n

R\u00e8n c\u00e1c v\u1ebft n\u1ee9t<\/h4>\n

C\u00e1c v\u1ebft n\u1ee9t do qu\u00e1 tr\u00ecnh r\u00e8n c\u00f3 th\u1ec3 xu\u1ea5t hi\u1ec7n trong qu\u00e1 tr\u00ecnh c\u1eaft ho\u1eb7c r\u00e8n v\u00e0 th\u01b0\u1eddng n\u1eb1m tr\u00ean b\u1ec1 m\u1eb7t tr\u00ean c\u00f9ng c\u1ee7a \u0111\u1ea7u bu l\u00f4ng v\u00e0 v\u00edt, ho\u1eb7c c\u00e1c ph\u1ea7n nh\u00f4 l\u00ean c\u1ee7a \u0111\u1ea7u v\u00edt l\u00f5m.<\/p>\n

\n\n\n\n\n
G\u00e2y ra<\/th>\n\u0110\u01b0\u1ee3c t\u1ea1o ra trong qu\u00e1 tr\u00ecnh d\u1eadp ho\u1eb7c r\u00e8n, n\u1eb1m tr\u00ean b\u1ec1 m\u1eb7t \u0111\u1ec9nh \u0111\u1ea7u ho\u1eb7c c\u00e1c ph\u1ea7n l\u00f5m nh\u00f4 l\u00ean c\u1ee7a \u0111\u1ea7u.<\/th>\n<\/tr>\n
Gi\u1edbi h\u1ea1n<\/td>\nChi\u1ec1u d\u00e0i l \u2264 1d; Chi\u1ec1u s\u00e2u ho\u1eb7c chi\u1ec1u r\u1ed9ng b \u2264 0,04d; trong \u0111\u00f3 d l\u00e0 \u0111\u01b0\u1eddng k\u00ednh ren danh ngh\u0129a.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

C\u00e1c v\u1ebft n\u1ee9t do r\u00e8n th\u01b0\u1eddng b\u1eaft ngu\u1ed3n t\u1eeb thi\u1ebft k\u1ebf khu\u00f4n kh\u00f4ng ph\u00f9 h\u1ee3p ho\u1eb7c t\u1ed1c \u0111\u1ed9 bi\u1ebfn d\u1ea1ng qu\u00e1 m\u1ee9c. Trong s\u1ea3n xu\u1ea5t h\u00e0ng lo\u1ea1t, vi\u1ec7c duy tr\u00ec b\u00f4i tr\u01a1n khu\u00f4n v\u00e0 ki\u1ec3m so\u00e1t nhi\u1ec7t \u0111\u1ed9 l\u00e0 r\u1ea5t quan tr\u1ecdng. C\u00e1c v\u1ebft n\u1ee9t n\u00e0y c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ph\u00e2n bi\u1ec7t v\u1edbi c\u00e1c v\u1ebft n\u1ee9t do t\u00f4i luy\u1ec7n b\u1eb1ng v\u1ecb tr\u00ed v\u00e0 h\u00ecnh th\u00e1i c\u1ee7a ch\u00fang. Gi\u1edbi h\u1ea1n \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh t\u01b0\u01a1ng \u0111\u1ed1i so v\u1edbi \u0111\u01b0\u1eddng k\u00ednh ren \u0111\u1ec3 ph\u00f9 h\u1ee3p v\u1edbi k\u00edch th\u01b0\u1edbc chi ti\u1ebft, \u0111\u1ea3m b\u1ea3o t\u00ednh t\u1ef7 l\u1ec7 thu\u1eadn. V\u01b0\u1ee3t qu\u00e1 gi\u1edbi h\u1ea1n c\u00f3 th\u1ec3 g\u00e2y ra h\u1ecfng \u0111\u1ea7u ren trong c\u00e1c \u1ee9ng d\u1ee5ng momen xo\u1eafn.<\/p>\n

<\/p>\n

R\u00e8n luy\u1ec7n b\u00f9ng n\u1ed5<\/h4>\n

Hi\u1ec7n t\u01b0\u1ee3ng n\u1ee9t v\u1ee1 x\u1ea3y ra trong qu\u00e1 tr\u00ecnh r\u00e8n, v\u00ed d\u1ee5 nh\u01b0 \u1edf c\u00e1c g\u00f3c c\u1ee7a \u0111\u1ea7u l\u1ee5c gi\u00e1c, m\u1eb7t b\u00edch, ho\u1eb7c chu vi \u0111\u1ea7u tr\u00f2n, ho\u1eb7c c\u00e1c ph\u1ea7n \u0111\u1ea7u l\u00f5m nh\u00f4 l\u00ean.<\/p>\n

\n\n\n\n\n
G\u00e2y ra<\/th>\n\u0110\u01b0\u1ee3c t\u1ea1o ra b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p r\u00e8n, v\u00ed d\u1ee5 nh\u01b0 tr\u00ean c\u00e1c g\u00f3c \u0111\u1ea7u l\u1ee5c gi\u00e1c, m\u1eb7t b\u00edch ho\u1eb7c chu vi \u0111\u1ea7u tr\u00f2n.<\/th>\n<\/tr>\n
Gi\u1edbi h\u1ea1n<\/td>\n\u0110\u1ed1i v\u1edbi \u0111\u1ea7u l\u1ee5c gi\u00e1c v\u00e0 \u0111\u1ea7u b\u00edch: V\u1ebft n\u1ee9t tr\u00ean m\u1eb7t b\u00edch kh\u00f4ng \u0111\u01b0\u1ee3c k\u00e9o d\u00e0i \u0111\u1ebfn b\u1ec1 m\u1eb7t tr\u00ean c\u00f9ng ho\u1eb7c b\u1ec1 m\u1eb7t ch\u1ecbu l\u1ef1c. V\u1ebft n\u1ee9t \u1edf g\u00f3c kh\u00f4ng \u0111\u01b0\u1ee3c l\u00e0m gi\u1ea3m chi\u1ec1u r\u1ed9ng xu\u1ed1ng d\u01b0\u1edbi m\u1ee9c t\u1ed1i thi\u1ec3u theo th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt. V\u1ebft n\u1ee9t tr\u00ean \u0111\u1ea7u nh\u00f4 cao c\u00f3 chi\u1ec1u r\u1ed9ng \u2264 0,06d ho\u1eb7c kh\u00f4ng nh\u1ecf h\u01a1n ph\u1ea7n l\u00f5m. \u0110\u1ed1i v\u1edbi \u0111\u1ea7u tr\u00f2n: Chi\u1ec1u r\u1ed9ng \u2264 0,08dc (ho\u1eb7c dk) cho m\u1ed9t v\u1ebft n\u1ee9t; \u2264 0,04dc (ho\u1eb7c dk) cho nhi\u1ec1u v\u1ebft n\u1ee9t, v\u1edbi m\u1ed9t v\u1ebft n\u1ee9t l\u00ean \u0111\u1ebfn 0,08dc (ho\u1eb7c dk). d = \u0111\u01b0\u1eddng k\u00ednh danh ngh\u0129a; dc = \u0111\u01b0\u1eddng k\u00ednh m\u1eb7t b\u00edch; dk \u200b\u200b= \u0111\u01b0\u1eddng k\u00ednh \u0111\u1ea7u.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Hi\u1ec7n t\u01b0\u1ee3ng n\u1ee9t v\u1ee1 khi r\u00e8n l\u00e0 do c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 d\u00f2ng ch\u1ea3y v\u1eadt li\u1ec7u trong khu\u00f4n. Ph\u1ea7n m\u1ec1m m\u00f4 ph\u1ecfng ti\u00ean ti\u1ebfn c\u00f3 th\u1ec3 d\u1ef1 \u0111o\u00e1n v\u00e0 gi\u1ea3m thi\u1ec3u ch\u00fang. C\u00e1c gi\u1edbi h\u1ea1n \u0111\u01b0\u1ee3c t\u00ednh \u0111\u1ebfn cho c\u00e1c khu v\u1ef1c ch\u1ee9c n\u0103ng nh\u01b0 b\u1ec1 m\u1eb7t ch\u1ecbu l\u1ef1c, gi\u00fap duy tr\u00ec s\u1ef1 ph\u00e2n b\u1ed1 t\u1ea3i tr\u1ecdng. \u0110\u1ed1i v\u1edbi c\u00e1c chi ti\u1ebft l\u1eafp gh\u00e9p b\u1eb1ng th\u00e9p kh\u00f4ng g\u1ec9, hi\u1ec7n t\u01b0\u1ee3ng n\u1ee9t v\u1ee1 c\u00f3 th\u1ec3 th\u00fac \u0111\u1ea9y \u0103n m\u00f2n khe h\u1edf, do \u0111\u00f3 n\u00ean ki\u1ec3m so\u00e1t ch\u1eb7t ch\u1ebd h\u01a1n.<\/p>\n

S\u1ef1 n\u1ed5 do l\u1ef1c c\u1eaft<\/h4>\n

Hi\u1ec7n t\u01b0\u1ee3ng n\u1ee9t v\u1ee1 do l\u1ef1c c\u1eaft x\u1ea3y ra trong qu\u00e1 tr\u00ecnh r\u00e8n tr\u00ean c\u00e1c \u0111\u01b0\u1eddng tr\u00f2n ho\u1eb7c chu vi m\u1eb7t b\u00edch \u1edf g\u00f3c kho\u1ea3ng 45\u00b0 so v\u1edbi tr\u1ee5c, ho\u1eb7c tr\u00ean c\u00e1c m\u1eb7t ph\u1eb3ng \u0111\u1ea7u l\u1ee5c gi\u00e1c.<\/p>\n

\n\n\n\n\n
G\u00e2y ra<\/th>\n\u0110\u01b0\u1ee3c s\u1ea3n xu\u1ea5t b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p r\u00e8n tr\u00ean c\u00e1c chu vi tr\u00f2n\/m\u1eb7t b\u00edch \u1edf g\u00f3c kho\u1ea3ng 45\u00b0 so v\u1edbi tr\u1ee5c, ho\u1eb7c c\u00e1c m\u1eb7t ph\u1eb3ng l\u1ee5c gi\u00e1c.<\/th>\n<\/tr>\n
Gi\u1edbi h\u1ea1n<\/td>\nT\u01b0\u01a1ng t\u1ef1 nh\u01b0 c\u00e1c v\u1ebft n\u1ee9t do r\u00e8n: V\u1ebft n\u1ee9t \u1edf m\u1eb7t b\u00edch kh\u00f4ng \u0111\u01b0\u1ee3c k\u00e9o d\u00e0i \u0111\u1ebfn \u0111\u1ec9nh\/\u1ed5 tr\u1ee5c. G\u00f3c kh\u00f4ng \u0111\u01b0\u1ee3c nh\u1ecf h\u01a1n chi\u1ec1u r\u1ed9ng t\u1ed1i thi\u1ec3u. Chi\u1ec1u r\u1ed9ng \u0111\u1ea7u nh\u00f4 l\u00ean \u2264 0,06d ho\u1eb7c kh\u00f4ng \u0111\u01b0\u1ee3c nh\u1ecf h\u01a1n ph\u1ea7n l\u00f5m. Chi\u1ec1u r\u1ed9ng m\u1eb7t b\u00edch\/\u0111\u01b0\u1eddng tr\u00f2n \u2264 0,08dc (ho\u1eb7c dk) \u0111\u1ed1i v\u1edbi m\u1ed9t chi ti\u1ebft; \u2264 0,04dc (ho\u1eb7c dk) \u0111\u1ed1i v\u1edbi nhi\u1ec1u chi ti\u1ebft.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Hi\u1ec7n t\u01b0\u1ee3ng \u0111\u1ee9t g\u00e3y do l\u1ef1c c\u1eaft cho th\u1ea5y \u1ee9ng su\u1ea5t c\u1eaft \u0111\u00e3 v\u01b0\u1ee3t qu\u00e1 gi\u1edbi h\u1ea1n. Bi\u1ec7n ph\u00e1p gi\u1ea3m thi\u1ec3u bao g\u1ed3m r\u00e8n nhi\u1ec1u giai \u0111o\u1ea1n. C\u00e1c gi\u1edbi h\u1ea1n b\u1ea3o v\u1ec7 c\u00e1c k\u00edch th\u01b0\u1edbc quan tr\u1ecdng, \u0111\u1ea3m b\u1ea3o kh\u1ea3 n\u0103ng si\u1ebft ch\u1eb7t v\u00e0 \u0111\u1ed9 b\u1ec1n.<\/p>\n

\u0110\u01b0\u1eddng n\u1ed1i v\u00e0 m\u1ed1i gh\u00e9p nguy\u00ean li\u1ec7u th\u00f4<\/h3>\n

C\u00e1c \u0111\u01b0\u1eddng n\u1ed1i v\u00e0 m\u1ed1i gh\u00e9p nguy\u00ean li\u1ec7u th\u00f4 l\u00e0 nh\u1eefng \u0111\u01b0\u1eddng th\u1eb3ng ho\u1eb7c \u0111\u01b0\u1eddng cong m\u1ecbn k\u00e9o d\u00e0i theo chi\u1ec1u d\u1ecdc d\u1ecdc theo c\u00e1c s\u1ee3i ch\u1ec9, th\u00e2n ho\u1eb7c \u0111\u1ea7u ch\u1ec9.<\/p>\n

\n\n\n\n\n
G\u00e2y ra<\/th>\nV\u1ed1n c\u00f3 trong nguy\u00ean li\u1ec7u th\u00f4 d\u00f9ng \u0111\u1ec3 s\u1ea3n xu\u1ea5t \u1ed1c v\u00edt.<\/th>\n<\/tr>\n
Gi\u1edbi h\u1ea1n<\/td>\n\u0110\u1ed9 s\u00e2u \u2264 0,03d. N\u1ebfu k\u00e9o d\u00e0i \u0111\u1ebfn \u0111\u1ea7u, kh\u00f4ng \u0111\u01b0\u1ee3c v\u01b0\u1ee3t qu\u00e1 gi\u1edbi h\u1ea1n ch\u1ecbu l\u1ef1c c\u1ee7a ph\u00f4i r\u00e8n. d = \u0111\u01b0\u1eddng k\u00ednh danh ngh\u0129a.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Nh\u1eefng khuy\u1ebft t\u1eadt n\u00e0y ph\u00e1t sinh t\u1eeb qu\u00e1 tr\u00ecnh c\u00e1n ho\u1eb7c k\u00e9o d\u00e2y th\u00e9p. Ch\u1ee9ng nh\u1eadn ch\u1ea5t l\u01b0\u1ee3ng c\u1ee7a nh\u00e0 cung c\u1ea5p l\u00e0 r\u1ea5t quan tr\u1ecdng. Ch\u00fang c\u00f3 th\u1ec3 g\u00e2y ra hi\u1ec7n t\u01b0\u1ee3ng t\u1eadp trung \u1ee9ng su\u1ea5t khi ch\u1ecbu t\u1ea3i k\u00e9o. Gi\u1edbi h\u1ea1n \u0111\u01b0\u1ee3c \u0111\u1eb7t ra m\u1ed9t c\u00e1ch th\u1eadn tr\u1ecdng \u0111\u1ec3 duy tr\u00ec \u0111\u1ed9 b\u1ec1n c\u1ee7a ren. Ki\u1ec3m tra si\u00eau \u00e2m gi\u00fap ph\u00e1t hi\u1ec7n c\u00e1c khuy\u1ebft t\u1eadt n\u00e0y trong v\u1eadt li\u1ec7u s\u1ed1 l\u01b0\u1ee3ng l\u1edbn.<\/p>\n

<\/p>\n

Quy tr\u00ecnh ki\u1ec3m tra v\u00e0 nghi\u1ec7m thu<\/h2>\n

Ki\u1ec3m tra nghi\u1ec7m thu tu\u00e2n theo ti\u00eau chu\u1ea9n GB\/T 90. C\u00e1c l\u1edbp ph\u1ee7 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn vi\u1ec7c nh\u1eadn di\u1ec7n khuy\u1ebft t\u1eadt ph\u1ea3i \u0111\u01b0\u1ee3c lo\u1ea1i b\u1ecf tr\u01b0\u1edbc khi ki\u1ec3m tra.<\/p>\n

L\u01b0u \u00fd: C\u00e1c b\u1ea3n s\u1eeda \u0111\u1ed5i GB\/T 90 c\u00f3 th\u1ec3 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ec3 tr\u00e1nh tr\u00f9ng l\u1eb7p.<\/p>\n

Quy t\u1eafc<\/h3>\n

C\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng b\u1ea5t k\u1ef3 quy tr\u00ecnh n\u00e0o \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o tu\u00e2n th\u1ee7. Ng\u01b0\u1eddi mua c\u00f3 th\u1ec3 \u00e1p d\u1ee5ng quy tr\u00ecnh n\u00e0y \u0111\u1ec3 ch\u1ea5p nh\u1eadn ho\u1eb7c t\u1eeb ch\u1ed1i. Quy tr\u00ecnh n\u00e0y \u0111\u00f3ng vai tr\u00f2 nh\u01b0 m\u1ed9t h\u00ecnh th\u1ee9c ph\u00e2n x\u1eed tr\u1eeb khi c\u00f3 th\u1ecfa thu\u1eadn kh\u00e1c.<\/p>\n

Ki\u1ec3m tra kh\u00f4ng ph\u00e1 h\u1ee7y<\/h3>\n

L\u1ea5y m\u1eabu ng\u1eabu nhi\u00ean t\u1eeb l\u00f4 h\u00e0ng v\u00e0 th\u1ef1c hi\u1ec7n c\u00e1c th\u1eed nghi\u1ec7m b\u1eb1ng m\u1eaft th\u01b0\u1eddng ho\u1eb7c kh\u00f4ng ph\u00e1 h\u1ee7y (v\u00ed d\u1ee5: t\u1eeb t\u00ednh ho\u1eb7c d\u00f2ng \u0111i\u1ec7n xo\u00e1y). Ch\u1ea5p nh\u1eadn n\u1ebfu khuy\u1ebft t\u1eadt n\u1eb1m trong gi\u1edbi h\u1ea1n cho ph\u00e9p; n\u1ebfu kh\u00f4ng, ti\u1ebfn h\u00e0nh th\u1eed nghi\u1ec7m ph\u00e1 h\u1ee7y theo m\u1ee5c 3.3.<\/p>\n

Ki\u1ec3m tra ph\u00e1 h\u1ee7y<\/h3>\n

\u0110\u1ed1i v\u1edbi c\u00e1c s\u1ea3n ph\u1ea9m kh\u00f4ng \u0111\u1ea1t ti\u00eau chu\u1ea9n theo m\u1ee5c 3.2, h\u00e3y l\u1ea5y m\u1eabu th\u1ee9 hai g\u1ed3m c\u00e1c s\u1ea3n ph\u1ea9m c\u00f3 khuy\u1ebft t\u1eadt nghi\u00eam tr\u1ecdng nh\u1ea5t v\u00e0 c\u1eaft vu\u00f4ng g\u00f3c v\u1edbi khuy\u1ebft t\u1eadt \u1edf \u0111\u1ed9 s\u00e2u t\u1ed1i \u0111a \u0111\u1ec3 ki\u1ec3m tra.<\/p>\n

Ph\u00e1n quy\u1ebft<\/h3>\n

Lo\u1ea1i b\u1ecf l\u00f4 h\u00e0ng n\u1ebfu c\u00f3 v\u1ebft n\u1ee9t do t\u00f4i luy\u1ec7n \u1edf b\u1ea5t k\u1ef3 v\u1ecb tr\u00ed n\u00e0o, n\u1ebfp g\u1ea5p \u1edf c\u00e1c g\u00f3c trong, ho\u1eb7c n\u1ebfp g\u1ea5p b\u00ean d\u01b0\u1edbi ph\u1ea7n \u0111\u1ee1 tr\u00ean c\u00e1c vai kh\u00f4ng tr\u00f2n v\u01b0\u1ee3t qu\u00e1 h\u00ecnh d\u1ea1ng ba th\u00f9y. Trong c\u00e1c th\u1eed nghi\u1ec7m ph\u00e1 h\u1ee7y, lo\u1ea1i b\u1ecf n\u1ebfu v\u01b0\u1ee3t qu\u00e1 gi\u1edbi h\u1ea1n v\u1ec1 v\u1ebft n\u1ee9t, v\u1ee1, \u0111\u01b0\u1eddng n\u1ed1i, l\u1ed7 r\u1ed7ng, v\u1ebft ho\u1eb7c h\u01b0 h\u1ecfng do r\u00e8n.<\/p>\n

C\u00e1c quy tr\u00ecnh ki\u1ec3m tra \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 c\u00e2n b\u1eb1ng gi\u1eefa hi\u1ec7u qu\u1ea3 v\u00e0 t\u00ednh k\u1ef9 l\u01b0\u1ee1ng. C\u00e1c ph\u01b0\u01a1ng ph\u00e1p kh\u00f4ng ph\u00e1 h\u1ee7y nh\u01b0 s\u1eed d\u1ee5ng ch\u1ea5t th\u1ea9m th\u1ea5u m\u00e0u gi\u00fap t\u0103ng kh\u1ea3 n\u0103ng quan s\u00e1t c\u00e1c v\u1ebft n\u1ee9t tr\u00ean b\u1ec1 m\u1eb7t m\u00e0 kh\u00f4ng c\u1ea7n ph\u00e1 h\u1ee7y chi ti\u1ebft. \u0110\u1ed1i v\u1edbi c\u00e1c l\u00f4 h\u00e0ng l\u1edbn, l\u1ea5y m\u1eabu th\u1ed1ng k\u00ea gi\u00fap gi\u1ea3m chi ph\u00ed trong khi v\u1eabn duy tr\u00ec m\u1ee9c \u0111\u1ed9 tin c\u1eady. Trong ng\u00e0nh h\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5, vi\u1ec7c ki\u1ec3m tra theo ti\u00eau chu\u1ea9n 100% c\u00f3 th\u1ec3 l\u00e0 b\u1eaft bu\u1ed9c. C\u00e1c quy tr\u00ecnh ph\u1ea3i ph\u00f9 h\u1ee3p v\u1edbi ti\u00eau chu\u1ea9n ISO \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o kh\u1ea3 n\u0103ng t\u01b0\u01a1ng t\u00e1c to\u00e0n c\u1ea7u. Vi\u1ec7c \u0111\u00e0o t\u1ea1o c\u00e1c thanh tra vi\u00ean v\u1ec1 ph\u00e2n t\u00edch c\u1ea5u tr\u00fac kim lo\u1ea1i \u0111\u1ec3 th\u1ef1c hi\u1ec7n c\u00e1c th\u1eed nghi\u1ec7m ph\u00e1 h\u1ee7y l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 \u0111o \u0111\u1ed9 s\u00e2u ch\u00ednh x\u00e1c. Nh\u00ecn chung, c\u00e1c b\u01b0\u1edbc n\u00e0y \u0111\u1ea3m b\u1ea3o ch\u1ec9 nh\u1eefng chi ti\u1ebft l\u1eafp gh\u00e9p kh\u00f4ng c\u00f3 khuy\u1ebft t\u1eadt m\u1edbi \u0111\u01b0\u1ee3c \u0111\u01b0a v\u00e0o s\u1eed d\u1ee5ng, ng\u0103n ng\u1eeba c\u00e1c s\u1ef1 c\u1ed1 x\u1ea3y ra trong th\u1ef1c t\u1ebf.<\/p>\n

K\u1ebf ho\u1ea1ch l\u1ea5y m\u1eabu \u0111\u1ec3 ph\u00e1t hi\u1ec7n khuy\u1ebft t\u1eadt b\u1ec1 m\u1eb7t<\/h2>\n
\n\n\n\n\n\n\n\n
B\u1ea3ng A1: K\u00edch th\u01b0\u1edbc m\u1eabu cho ki\u1ec3m tra tr\u1ef1c quan v\u00e0 kh\u00f4ng ph\u00e1 h\u1ee7y<\/caption>\n
K\u00edch th\u01b0\u1edbc l\u00f4 h\u00e0ng N<\/th>\nK\u00edch th\u01b0\u1edbc m\u1eabu n<\/th>\n<\/tr>\n
N \u2264 1200<\/td>\n20<\/td>\n<\/tr>\n
1201 \u2264 N \u2264 10000<\/td>\n32<\/td>\n<\/tr>\n
10001 \u2264 N \u2264 35000<\/td>\n50<\/td>\n<\/tr>\n
35001 \u2264 N \u2264 150000<\/td>\n80<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

L\u01b0u \u00fd: K\u00edch th\u01b0\u1edbc m\u1eabu d\u1ef1a tr\u00ean B\u1ea3ng 10, c\u1ea5p \u0111\u1ed9 ki\u1ec3m tra S-4 c\u1ee7a ti\u00eau chu\u1ea9n GB\/T 15239. L\u00f4 l\u00e0 s\u1ed1 l\u01b0\u1ee3ng s\u1ea3n ph\u1ea9m c\u00f9ng lo\u1ea1i, k\u00edch th\u01b0\u1edbc, c\u1ea5p \u0111\u1ed9 t\u00ednh ch\u1ea5t \u0111\u01b0\u1ee3c g\u1eedi c\u00f9ng m\u1ed9t l\u00fac.<\/p>\n

\n\n\n\n\n\n\n\n\n
B\u1ea3ng A2: K\u00edch th\u01b0\u1edbc m\u1eabu th\u1ee9 hai cho ki\u1ec3m tra ph\u00e1 h\u1ee7y<\/caption>\n
S\u1ed1 l\u01b0\u1ee3ng s\u1ea3n ph\u1ea9m l\u1ed7i trong m\u1eabu N<\/th>\nK\u00edch th\u01b0\u1edbc m\u1eabu th\u1ee9 hai n<\/th>\n<\/tr>\n
N \u2264 8<\/td>\n2<\/td>\n<\/tr>\n
9 \u2264 N \u2264 15<\/td>\n3<\/td>\n<\/tr>\n
16 \u2264 N \u2264 25<\/td>\n5<\/td>\n<\/tr>\n
26 \u2264 N \u2264 50<\/td>\n8<\/td>\n<\/tr>\n
51 \u2264 N \u2264 80<\/td>\n13<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

L\u01b0u \u00fd: D\u1ef1a tr\u00ean B\u1ea3ng 2 v\u00e0 3 c\u1ee7a ti\u00eau chu\u1ea9n GB\/T 2828, m\u1ee9c ki\u1ec3m tra chung c\u1ea5p II.<\/p>\n

C\u00e1c k\u1ebf ho\u1ea1ch l\u1ea5y m\u1eabu cung c\u1ea5p s\u1ef1 \u0111\u1ea3m b\u1ea3o v\u1ec1 m\u1eb7t th\u1ed1ng k\u00ea \u0111\u1ed1i v\u1edbi ch\u1ea5t l\u01b0\u1ee3ng l\u00f4 h\u00e0ng. \u0110\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng quan tr\u1ecdng, c\u00f3 th\u1ec3 \u00e1p d\u1ee5ng m\u1ee9c AQL nghi\u00eam ng\u1eb7t h\u01a1n. T\u1ef1 \u0111\u1ed9ng h\u00f3a trong l\u1ea5y m\u1eabu gi\u00fap t\u0103ng t\u00ednh l\u1eb7p l\u1ea1i. C\u00e1c k\u1ebf ho\u1ea1ch n\u00e0y gi\u1ea3m thi\u1ec3u th\u1eddi gian ki\u1ec3m tra \u0111\u1ed3ng th\u1eddi ki\u1ec3m so\u00e1t r\u1ee7i ro.<\/p>\n

C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p (FAQ)<\/h2>\n
    \n
  • \u0110i\u1ec3m kh\u00e1c bi\u1ec7t gi\u1eefa v\u1ebft n\u1ee9t do t\u00f4i luy\u1ec7n v\u00e0 v\u1ebft n\u1ee9t do r\u00e8n l\u00e0 g\u00ec?<\/strong> C\u00e1c v\u1ebft n\u1ee9t do t\u00f4i luy\u1ec7n xu\u1ea5t hi\u1ec7n kh\u00f4ng \u0111\u1ec1u do \u1ee9ng su\u1ea5t trong qu\u00e1 tr\u00ecnh x\u1eed l\u00fd nhi\u1ec7t; c\u00e1c v\u1ebft n\u1ee9t do r\u00e8n xu\u1ea5t hi\u1ec7n trong qu\u00e1 tr\u00ecnh gia c\u00f4ng \u1edf nh\u1eefng v\u00f9ng c\u1ee5 th\u1ec3 tr\u00ean \u0111\u1ea7u s\u1ea3n ph\u1ea9m. C\u1ea3 hai lo\u1ea1i v\u1ebft n\u1ee9t n\u00e0y \u0111\u1ec1u b\u1ecb c\u1ea5m ho\u1eb7c h\u1ea1n ch\u1ebf nghi\u00eam ng\u1eb7t.<\/li>\n
  • L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 \u0111o \u0111\u1ed9 s\u00e2u c\u1ee7a khuy\u1ebft t\u1eadt m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c?<\/strong> S\u1eed d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p c\u1eaft ph\u00e1 h\u1ee7y vu\u00f4ng g\u00f3c v\u1edbi khuy\u1ebft t\u1eadt, sau \u0111\u00f3 ti\u1ebfn h\u00e0nh ki\u1ec3m tra b\u1eb1ng k\u00ednh hi\u1ec3n vi theo ti\u00eau chu\u1ea9n luy\u1ec7n kim.<\/li>\n
  • L\u1edbp ph\u1ee7 c\u00f3 \u0111\u01b0\u1ee3c xem x\u00e9t trong gi\u1edbi h\u1ea1n khuy\u1ebft t\u1eadt kh\u00f4ng?<\/strong> Theo ti\u00eau chu\u1ea9n, n\u1ebfu l\u1edbp ph\u1ee7 che khu\u1ea5t c\u00e1c khuy\u1ebft t\u1eadt, ch\u00fang ph\u1ea3i \u0111\u01b0\u1ee3c lo\u1ea1i b\u1ecf tr\u01b0\u1edbc khi ki\u1ec3m tra.<\/li>\n
  • \u0110i\u1ec1u g\u00ec s\u1ebd x\u1ea3y ra n\u1ebfu s\u1ed1 l\u01b0\u1ee3ng l\u1ed7i v\u01b0\u1ee3t qu\u00e1 gi\u1edbi h\u1ea1n cho ph\u00e9p trong m\u1ed9t m\u1eabu?<\/strong> Ti\u1ebfn h\u00e0nh l\u1ea5y m\u1eabu l\u1ea7n th\u1ee9 hai v\u00e0 ki\u1ec3m tra ph\u00e1 h\u1ee7y; lo\u1ea1i b\u1ecf l\u00f4 h\u00e0ng n\u1ebfu x\u00e1c nh\u1eadn v\u01b0\u1ee3t qu\u00e1 gi\u1edbi h\u1ea1n cho ph\u00e9p.<\/li>\n
  • Ti\u00eau chu\u1ea9n n\u00e0y c\u00f3 th\u1ec3 \u00e1p d\u1ee5ng cho \u1ed1c v\u00edt b\u1eb1ng th\u00e9p kh\u00f4ng g\u1ec9 kh\u00f4ng?<\/strong> \u0110\u00fang v\u1eady, nh\u01b0ng c\u00e1c y\u1ebfu t\u1ed1 \u0103n m\u00f2n b\u1ed5 sung c\u00f3 th\u1ec3 \u0111\u00f2i h\u1ecfi c\u00e1c gi\u1edbi h\u1ea1n ch\u1eb7t ch\u1ebd h\u01a1n so v\u1edbi ti\u00eau chu\u1ea9n GB\/T 5779.1-2000.<\/li>\n
  • L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 ng\u0103n ng\u1eeba c\u00e1c \u0111\u01b0\u1eddng n\u1ed1i nguy\u00ean li\u1ec7u th\u00f4?<\/strong> Ch\u1ecdn nh\u00e0 cung c\u1ea5p \u0111\u01b0\u1ee3c ch\u1ee9ng nh\u1eadn c\u00f3 h\u00e0ng t\u1ed3n kho \u0111\u00e3 \u0111\u01b0\u1ee3c ki\u1ec3m tra b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p ki\u1ec3m tra d\u00f2ng \u0111i\u1ec7n xo\u00e1y; th\u1ef1c hi\u1ec7n c\u00e1c quy tr\u00ecnh ki\u1ec3m tra h\u00e0ng nh\u1eadp.<\/li>\n<\/ul>\n

    T\u00e0i li\u1ec7u tham kh\u1ea3o v\u00e0 ngu\u1ed3n b\u1ed5 sung<\/h2>\n

    \u0110\u1ec3 t\u00ecm hi\u1ec3u th\u00eam: GB\/T 90, ISO 6157-1, GB\/T 15239, GB\/T 2828. Tham kh\u1ea3o c\u00e1c c\u1ea9m nang ng\u00e0nh v\u1ec1 ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng \u1ed1c v\u00edt.<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"

    Introduction to GB\/T 5779.1-2000 Standard The GB\/T 5779.1-2000 standard specifies general requirements for surface defects on fasteners, particularly bolts, screws, and studs. This standard is essential for ensuring the quality and reliability of mechanical fasteners in various industries, including automotive, aerospace, construction, and machinery manufacturing. It defines acceptable limits for surface imperfections that could compromise […]<\/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-5642","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\/5642","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=5642"}],"version-history":[{"count":2,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/posts\/5642\/revisions"}],"predecessor-version":[{"id":5644,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/posts\/5642\/revisions\/5644"}],"wp:attachment":[{"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/media?parent=5642"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/categories?post=5642"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/tags?post=5642"}],"curies":[{"name":"trang web","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}