{"id":5694,"date":"2025-12-24T01:00:17","date_gmt":"2025-12-24T01:00:17","guid":{"rendered":"https:\/\/korea-transmission.com\/?p=5694"},"modified":"2025-12-24T01:00:17","modified_gmt":"2025-12-24T01:00:17","slug":"gb-t-3098-14-2000-nut-expansion-test-for-fasteners","status":"publish","type":"post","link":"https:\/\/korea-transmission.com\/vi\/blog\/gb-t-3098-14-2000-nut-expansion-test-for-fasteners\/","title":{"rendered":"Ti\u00eau chu\u1ea9n GB\/T 3098.14-2000 Th\u1eed nghi\u1ec7m gi\u00e3n n\u1edf \u0111ai \u1ed1c cho c\u00e1c lo\u1ea1i \u1ed1c v\u00edt"},"content":{"rendered":"
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Gi\u1edbi thi\u1ec7u v\u1ec1 Ti\u00eau chu\u1ea9n GB\/T 3098.14-2000<\/h2>\n

Ti\u00eau chu\u1ea9n GB\/T 3098.14-2000 quy \u0111\u1ecbnh c\u00e1c \u0111\u1eb7c t\u00ednh c\u01a1 h\u1ecdc c\u1ee7a c\u00e1c lo\u1ea1i \u1ed1c v\u00edt, t\u1eadp trung v\u00e0o th\u1eed nghi\u1ec7m gi\u00e3n n\u1edf \u0111ai \u1ed1c. Ti\u00eau chu\u1ea9n n\u00e0y r\u1ea5t c\u1ea7n thi\u1ebft \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 d\u1ebbo dai v\u00e0 t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a \u0111ai \u1ed1c d\u01b0\u1edbi t\u00e1c \u0111\u1ed9ng c\u1ee7a \u1ee9ng su\u1ea5t c\u01a1 h\u1ecdc, \u0111\u1eb7c bi\u1ec7t trong c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p nh\u01b0 \u00f4 t\u00f4, h\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5 v\u00e0 x\u00e2y d\u1ef1ng. Th\u1eed nghi\u1ec7m \u0111\u00e1nh gi\u00e1 kh\u1ea3 n\u0103ng ch\u1ecbu \u0111\u01b0\u1ee3c s\u1ef1 gi\u00e3n n\u1edf c\u1ee7a l\u1ed7 m\u00e0 kh\u00f4ng b\u1ecb h\u1ecfng s\u1edbm c\u1ee7a \u0111ai \u1ed1c, cung c\u1ea5p d\u1eef li\u1ec7u quan tr\u1ecdng cho vi\u1ec7c l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u v\u00e0 ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng. L\u00e0 m\u1ed9t chuy\u00ean gia v\u1ec1 v\u1eadt li\u1ec7u c\u01a1 kh\u00ed, quy tr\u00ecnh n\u00e0y gi\u00fap x\u00e1c minh s\u1ef1 tu\u00e2n th\u1ee7 c\u00e1c c\u1ea5p hi\u1ec7u su\u1ea5t, ng\u0103n ng\u1eeba s\u1ef1 h\u1ecfng h\u00f3c trong c\u00e1c \u1ee9ng d\u1ee5ng t\u1ea3i tr\u1ecdng cao.<\/p>\n

Th\u1eed nghi\u1ec7m gi\u00e3n n\u1edf \u0111o l\u01b0\u1eddng ph\u1ea7n tr\u0103m t\u0103ng \u0111\u01b0\u1eddng k\u00ednh l\u1ed7 sau khi lo\u1ea1i b\u1ecf ren trong v\u00e0 \u00e9p m\u1ed9t tr\u1ee5c c\u00f4n xuy\u00ean qua \u0111ai \u1ed1c. \u0110i\u1ec1u n\u00e0y \u0111\u1ea3m b\u1ea3o \u0111ai \u1ed1c \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u gi\u00e3n n\u1edf t\u1ed1i thi\u1ec3u, ph\u1ea3n \u00e1nh \u0111\u1ed9 b\u1ec1n v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng n\u1ee9t c\u1ee7a v\u1eadt li\u1ec7u.<\/p>\n<\/div>\n

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Nguy\u00ean l\u00fd c\u1ee7a ph\u00e9p th\u1eed gi\u00e3n n\u1edf<\/h2>\n

Nguy\u00ean t\u1eafc n\u00e0y bao g\u1ed3m vi\u1ec7c lo\u1ea1i b\u1ecf c\u00e1c ren b\u00ean trong \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c \u0111\u01b0\u1eddng k\u00ednh ren danh ngh\u0129a, sau \u0111\u00f3 \u0111\u1ea9y m\u1ed9t tr\u1ee5c c\u00f4n v\u00e0o \u0111ai \u1ed1c. Ph\u1ea7n tr\u0103m gi\u00e3n n\u1edf \u0111\u01b0\u1eddng k\u00ednh l\u1ed7 sau \u0111\u00f3 \u0111\u01b0\u1ee3c \u0111o. Qu\u00e1 tr\u00ecnh n\u00e0y \u0111\u00e1nh gi\u00e1 \u0111\u1ed9 d\u1ebbo c\u1ee7a \u0111ai \u1ed1c, \u0111\u1ea3m b\u1ea3o n\u00f3 c\u00f3 th\u1ec3 bi\u1ebfn d\u1ea1ng m\u00e0 kh\u00f4ng b\u1ecb g\u00e3y trong gi\u1edbi h\u1ea1n quy \u0111\u1ecbnh.<\/p>\n

    \n
  • Vi\u1ec7c lo\u1ea1i b\u1ecf ph\u1ea7n ren \u0111\u1ebfn \u0111\u01b0\u1eddng k\u00ednh danh ngh\u0129a (dung sai H12) gi\u00fap chu\u1ea9n b\u1ecb m\u1eabu v\u1eadt cho qu\u00e1 tr\u00ecnh th\u1eed nghi\u1ec7m \u0111\u1ed3ng nh\u1ea5t.<\/li>\n
  • Vi\u1ec7c ch\u00e8n tr\u1ee5c \u0111\u1ecbnh h\u00ecnh m\u00f4 ph\u1ecfng l\u1ef1c gi\u00e3n n\u1edf, gi\u00fap ph\u00e1t hi\u1ec7n c\u00e1c \u0111i\u1ec3m y\u1ebfu c\u1ee7a v\u1eadt li\u1ec7u.<\/li>\n
  • Vi\u1ec7c \u0111o l\u01b0\u1eddng t\u1ef7 l\u1ec7 gi\u00e3n n\u1edf s\u1ebd quy\u1ebft \u0111\u1ecbnh k\u1ebft qu\u1ea3 \u0111\u1ea1t\/kh\u00f4ng \u0111\u1ea1t d\u1ef1a tr\u00ean \u0111i\u1ec3m \u0111\u00e1nh gi\u00e1 hi\u1ec7u su\u1ea5t.<\/li>\n<\/ul>\n

    Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi c\u00e1c lo\u1ea1i \u0111ai \u1ed1c trong m\u00f4i tr\u01b0\u1eddng d\u1ec5 b\u1ecb rung \u0111\u1ed9ng, v\u00ec n\u00f3 c\u00f3 li\u00ean quan \u0111\u1ebfn \u0111\u1ed9 tin c\u1eady c\u01a1 h\u1ecdc t\u1ed5ng th\u1ec3.<\/p>\n<\/div>\n

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    Th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt tr\u1ee5c th\u1eed nghi\u1ec7m<\/h2>\n

    Tr\u1ee5c th\u1eed nghi\u1ec7m, nh\u01b0 minh h\u1ecda trong H\u00ecnh 1, \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 \u0111o \u0111\u1ed9 gi\u00e3n n\u1edf c\u1ee7a th\u00e9p 6% ho\u1eb7c 4% (tham kh\u1ea3o Ch\u01b0\u01a1ng 4 c\u1ee7a ti\u00eau chu\u1ea9n). N\u00f3 ph\u1ea3i c\u00f3 \u0111\u1ed9 c\u1ee9ng t\u1ed1i thi\u1ec3u \u226545 HRC, v\u1edbi ph\u1ea7n c\u00f4n \u0111\u01b0\u1ee3c \u0111\u00e1nh b\u00f3ng \u0111\u1ebfn \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t Ra=2,5 \u03bcm.<\/p>\n

      \n
    • \u0110\u1ed1i v\u1edbi b\u1ed9 gi\u00e3n n\u1edf 6%: \u0110\u01b0\u1eddng k\u00ednh tr\u1ee5c g\u00e1 t\u01b0\u01a1ng \u1ee9ng v\u1edbi 1,06D.<\/li>\n
    • \u0110\u1ed1i v\u1edbi b\u1ed9 gi\u00e3n n\u1edf 4%: \u0110\u01b0\u1eddng k\u00ednh tr\u1ee5c g\u00e1 t\u01b0\u01a1ng \u1ee9ng v\u1edbi 1,04D.<\/li>\n
    • D bi\u1ec3u th\u1ecb \u0111\u01b0\u1eddng k\u00ednh ren danh ngh\u0129a; \u0111\u1ed1i v\u1edbi \u0111ai \u1ed1c t\u1ef1 ren c\u1ee1 l\u1edbn, D \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh cho ph\u00f9 h\u1ee3p v\u1edbi \u0111\u01b0\u1eddng k\u00ednh l\u1edbn h\u01a1n.<\/li>\n<\/ul>\n

      Vi\u1ec7c chu\u1ea9n b\u1ecb tr\u1ee5c g\u00e1 \u0111\u00fang c\u00e1ch \u0111\u1ea3m b\u1ea3o k\u1ebft qu\u1ea3 ch\u00ednh x\u00e1c, c\u00f3 th\u1ec3 l\u1eb7p l\u1ea1i, gi\u1ea3m thi\u1ec3u sai s\u00f3t do ma s\u00e1t trong qu\u00e1 tr\u00ecnh th\u1eed nghi\u1ec7m.<\/p>\n<\/div>\n

      \n

      Chu\u1ea9n b\u1ecb m\u1eabu h\u1ea1t<\/h2>\n

      M\u1eabu \u0111ai \u1ed1c ph\u1ea3i \u0111\u01b0\u1ee3c lo\u1ea1i b\u1ecf ph\u1ea7n ren sao cho \u0111\u01b0\u1eddng k\u00ednh ren b\u1eb1ng \u0111\u01b0\u1eddng k\u00ednh ren danh ngh\u0129a v\u1edbi dung sai H12. Vi\u1ec7c chu\u1ea9n b\u1ecb n\u00e0y cho ph\u00e9p \u0111ai \u1ed1c tr\u1ea3i qua th\u1eed nghi\u1ec7m gi\u00e3n n\u1edf m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3, m\u00f4 ph\u1ecfng c\u00e1c t\u00ecnh hu\u1ed1ng bi\u1ebfn d\u1ea1ng th\u1ef1c t\u1ebf.<\/p>\n

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      1. Th\u00e1o ch\u1ec9 th\u1eadt ch\u00ednh x\u00e1c \u0111\u1ec3 tr\u00e1nh t\u1ea1o ra l\u1ed7i.<\/li>\n
      2. \u0110\u1ea3m b\u1ea3o m\u1eabu v\u1eadt c\u00f3 th\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c th\u1eed nghi\u1ec7m m\u00e0 kh\u00f4ng b\u1ecb h\u01b0 h\u1ea1i tr\u01b0\u1edbc \u0111\u00f3.<\/li>\n
      3. \u0110\u1ed1i v\u1edbi tr\u1ecdng t\u00e0i, c\u1ea7n tu\u00e2n th\u1ee7 nghi\u00eam ng\u1eb7t nguy\u00ean t\u1eafc dung sai \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o t\u00ednh nh\u1ea5t qu\u00e1n.<\/li>\n<\/ol>\n

        C\u00e1c m\u1eabu v\u1eadt \u0111\u00e3 chu\u1ea9n b\u1ecb c\u1ea7n \u0111\u01b0\u1ee3c ki\u1ec3m tra t\u00ednh \u0111\u1ed3ng nh\u1ea5t, v\u00ec s\u1ef1 kh\u00e1c bi\u1ec7t c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e1c ph\u00e9p \u0111o \u0111\u1ed9 gi\u00e3n n\u1edf v\u00e0 d\u1eabn \u0111\u1ebfn \u0111\u00e1nh gi\u00e1 kh\u00f4ng ch\u00ednh x\u00e1c v\u1ec1 c\u00e1c t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc.<\/p>\n<\/div>\n

        \n

        Quy tr\u00ecnh th\u1eed nghi\u1ec7m<\/h2>\n

        Tr\u01b0\u1edbc khi th\u1eed nghi\u1ec7m, b\u00f4i ch\u1ea5t b\u00f4i tr\u01a1n molypden disulfua (MoS\u2082) l\u00ean tr\u1ee5c g\u00e1. \u0110\u01b0a tr\u1ee5c g\u00e1 v\u00e0o m\u1eabu \u0111ai \u1ed1c nh\u01b0 h\u00ecnh 2. T\u00e1c d\u1ee5ng l\u1ef1c t\u1eeb t\u1eeb, li\u00ean t\u1ee5c v\u00e0 \u0111\u1ed3ng tr\u1ee5c cho \u0111\u1ebfn khi ph\u1ea7n h\u00ecnh tr\u1ee5 c\u1ee7a tr\u1ee5c g\u00e1 xuy\u00ean qua l\u1ed7 \u0111ai \u1ed1c. C\u1ed1 \u0111\u1ecbnh ch\u1eafc ch\u1eafn \u0111\u1ea7u tr\u00ean c\u1ee7a tr\u1ee5c g\u00e1. \u0110\u1ed1i v\u1edbi c\u00e1c th\u1eed nghi\u1ec7m tr\u1ecdng t\u00e0i, t\u1ed1c \u0111\u1ed9 \u0111\u01b0a tr\u1ee5c g\u00e1 v\u00e0o kh\u00f4ng \u0111\u01b0\u1ee3c v\u01b0\u1ee3t qu\u00e1 25 mm\/ph\u00fat.<\/p>\n

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        • Vi\u1ec7c b\u00f4i tr\u01a1n gi\u00fap gi\u1ea3m ma s\u00e1t, \u0111\u1ea3m b\u1ea3o ph\u00e9p th\u1eed \u0111o l\u01b0\u1eddng ch\u00ednh x\u00e1c c\u00e1c \u0111\u1eb7c t\u00ednh v\u1eadt li\u1ec7u.<\/li>\n
        • Vi\u1ec7c ki\u1ec3m so\u00e1t t\u1ed1c \u0111\u1ed9 gi\u00fap ng\u0103n ng\u1eeba c\u00e1c hi\u1ec7u \u1ee9ng \u0111\u1ed9ng c\u00f3 th\u1ec3 l\u00e0m sai l\u1ec7ch k\u1ebft qu\u1ea3.<\/li>\n
        • Vi\u1ec7c c\u0103n ch\u1ec9nh \u0111\u1ed3ng tr\u1ee5c l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 tr\u00e1nh s\u1ef1 ph\u00e2n b\u1ed1 \u1ee9ng su\u1ea5t kh\u00f4ng \u0111\u1ed3ng \u0111\u1ec1u.<\/li>\n<\/ul>\n

          Quy tr\u00ecnh n\u00e0y cung c\u1ea5p d\u1eef li\u1ec7u \u0111\u00e1ng tin c\u1eady v\u1ec1 hi\u1ec7u su\u1ea5t c\u1ee7a \u0111ai \u1ed1c, gi\u00fap c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t c\u1ea3i ti\u1ebfn quy tr\u00ecnh s\u1ea3n xu\u1ea5t.<\/p>\n<\/div>\n

          \n

          Ti\u00eau ch\u00ed \u0111\u00e1nh gi\u00e1<\/h2>\n

          T\u1ed5ng \u0111\u1ed9 gi\u00e3n n\u1edf c\u1ee7a c\u00e1c lo\u1ea1i h\u1ea1t nh\u01b0 sau:<\/p>\n

          \n\n\n\n\n\n\n
          C\u1ea5p \u0111\u1ed9 hi\u1ec7u n\u0103ng<\/th>\nM\u1ee9c m\u1edf r\u1ed9ng t\u1ed1i thi\u1ec3u (%)<\/th>\n<\/tr>\n<\/thead>\n
          4 \u0111\u1ebfn 12<\/td>\n6<\/td>\n<\/tr>\n
          04 v\u00e0 05<\/td>\n4<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

          N\u1ebfu th\u00e0nh \u0111ai \u1ed1c b\u1ecb n\u1ee9t ho\u00e0n to\u00e0n tr\u01b0\u1edbc khi \u0111\u1ea1t \u0111\u1ebfn gi\u00e1 tr\u1ecb gi\u00e3n n\u1edf t\u1ed1i thi\u1ec3u, n\u00f3 \u0111\u01b0\u1ee3c coi l\u00e0 kh\u00f4ng \u0111\u1ea1t ti\u00eau chu\u1ea9n. Trong tr\u01b0\u1eddng h\u1ee3p tranh ch\u1ea5p, h\u00e3y c\u1eaft \u0111ai \u1ed1c \u1edf ph\u00eda \u0111\u1ed1i di\u1ec7n v\u1ebft n\u1ee9t; n\u1ebfu n\u00f3 b\u1ecb t\u00e1ch th\u00e0nh hai n\u1eeda, th\u00ec n\u00f3 b\u1ecb h\u1ecfng. Ti\u00eau ch\u00ed n\u00e0y \u0111\u1ea3m b\u1ea3o \u0111ai \u1ed1c duy tr\u00ec t\u00ednh to\u00e0n v\u1eb9n c\u1ea5u tr\u00fac d\u01b0\u1edbi c\u00e1c bi\u1ebfn d\u1ea1ng quy \u0111\u1ecbnh.<\/p>\n<\/div>\n

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          C\u00e1c tr\u01b0\u1eddng h\u1ee3p \u0111\u1eb7c bi\u1ec7t \u0111\u1ed1i v\u1edbi \u0111ai \u1ed1c si\u1ebft l\u1ef1c ch\u1ee7 \u0111\u1ed9ng<\/h2>\n

          \u0110\u1ed1i v\u1edbi c\u00e1c lo\u1ea1i \u0111ai \u1ed1c si\u1ebft momen xo\u1eafn theo ti\u00eau chu\u1ea9n GB\/T 3098.9, \u0111\u1ed9 gi\u00e3n n\u1edf t\u1ed1i thi\u1ec3u kh\u00f4ng \u0111\u01b0\u1ee3c v\u01b0\u1ee3t qu\u00e1 20% so v\u1edbi c\u00e1c gi\u00e1 tr\u1ecb quy \u0111\u1ecbnh cho \u0111ai \u1ed1c l\u1ee5c gi\u00e1c trong Ch\u01b0\u01a1ng 4. S\u1ef1 \u0111i\u1ec1u ch\u1ec9nh n\u00e0y t\u00ednh \u0111\u1ebfn c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m thi\u1ebft k\u1ebf c\u1ee7a ch\u00fang, c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn \u0111\u1ed9 d\u1ebbo.<\/p>\n

          Vi\u1ec7c ki\u1ec3m tra c\u00e1c lo\u1ea1i \u0111ai \u1ed1c n\u00e0y \u0111\u00f2i h\u1ecfi ph\u1ea3i xem x\u00e9t c\u1ea9n th\u1eadn c\u01a1 ch\u1ebf kh\u00f3a momen xo\u1eafn c\u1ee7a ch\u00fang \u0111\u1ec3 tr\u00e1nh hi\u1ec3u sai k\u1ebft qu\u1ea3.<\/p>\n<\/div>\n

          \n

          C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p (FAQ)<\/h2>\n
            \n
          1. M\u1ee5c \u0111\u00edch c\u1ee7a th\u1eed nghi\u1ec7m gi\u00e3n n\u1edf \u0111ai \u1ed1c trong ti\u00eau chu\u1ea9n GB\/T 3098.14-2000 l\u00e0 g\u00ec?<\/strong>
            \nB\u00e0i ki\u1ec3m tra n\u00e0y \u0111\u00e1nh gi\u00e1 \u0111\u1ed9 d\u1ebbo c\u1ee7a \u0111ai \u1ed1c b\u1eb1ng c\u00e1ch \u0111o kh\u1ea3 n\u0103ng gi\u00e3n n\u1edf m\u00e0 kh\u00f4ng b\u1ecb g\u00e3y, \u0111\u1ea3m b\u1ea3o ch\u00fang \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u v\u1ec1 hi\u1ec7u su\u1ea5t c\u01a1 h\u1ecdc \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o an to\u00e0n trong c\u00e1c \u1ee9ng d\u1ee5ng.<\/li>\n
          2. C\u1ea7n chu\u1ea9n b\u1ecb tr\u1ee5c g\u00e1 nh\u01b0 th\u1ebf n\u00e0o \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 ch\u00ednh x\u00e1c khi th\u1eed nghi\u1ec7m?<\/strong>
            \nS\u1eed d\u1ee5ng ch\u1ea5t b\u00f4i tr\u01a1n MoS\u2082, \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 c\u1ee9ng t\u1ed1i thi\u1ec3u 45 HRC v\u00e0 \u0111\u00e1nh b\u00f3ng ph\u1ea7n c\u00f4n \u0111\u1ebfn \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t Ra=2,5 \u03bcm \u0111\u1ec3 gi\u1ea3m thi\u1ec3u ma s\u00e1t v\u00e0 thu \u0111\u01b0\u1ee3c d\u1eef li\u1ec7u gi\u00e3n n\u1edf \u0111\u00e1ng tin c\u1eady.<\/li>\n
          3. Gi\u1edbi h\u1ea1n gi\u00e3n n\u1edf \u0111\u1ed1i v\u1edbi c\u00e1c c\u1ea5p hi\u1ec7u su\u1ea5t kh\u00e1c nhau l\u00e0 bao nhi\u00eau?<\/strong>
            \n\u0110\u1ed1i v\u1edbi c\u00e1c c\u1ea5p \u0111\u1ed9 t\u1eeb 4 \u0111\u1ebfn 12, m\u1ee9c t\u1ed1i thi\u1ec3u l\u00e0 6%; \u0111\u1ed1i v\u1edbi c\u1ea5p \u0111\u1ed9 04 v\u00e0 05, m\u1ee9c t\u1ed1i thi\u1ec3u l\u00e0 4%. X\u1ea3y ra s\u1ef1 c\u1ed1 n\u1ebfu g\u00e3y ho\u00e0n to\u00e0n tr\u01b0\u1edbc khi \u0111\u1ea1t \u0111\u1ebfn gi\u1edbi h\u1ea1n n\u00e0y.<\/li>\n
          4. B\u00e0i ki\u1ec3m tra \u0111\u1ed1i v\u1edbi \u0111ai \u1ed1c si\u1ebft l\u1ef1c hi\u1ec7n h\u00e0nh c\u00f3 g\u00ec kh\u00e1c bi\u1ec7t?<\/strong>
            \n\u0110\u1ed9 gi\u00e3n n\u1edf t\u1ed1i thi\u1ec3u c\u1ee7a ch\u00fang b\u1ecb gi\u1edbi h\u1ea1n \u1edf m\u1ee9c 20% so v\u1edbi gi\u00e1 tr\u1ecb \u0111ai \u1ed1c l\u1ee5c gi\u00e1c ti\u00eau chu\u1ea9n theo ti\u00eau chu\u1ea9n GB\/T 3098.9, c\u00f3 t\u00ednh \u0111\u1ebfn c\u00e1c \u0111\u1eb7c t\u00ednh m\u00f4-men xo\u1eafn c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m \u0111\u1ed9 d\u1ebbo.<\/li>\n
          5. T\u1ed1c \u0111\u1ed9 n\u00e0o \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb cho vi\u1ec7c l\u1eafp tr\u1ee5c g\u00e1 trong c\u00e1c th\u1eed nghi\u1ec7m tr\u1ecdng t\u00e0i?<\/strong>
            \nKh\u00f4ng \u0111\u01b0\u1ee3c v\u01b0\u1ee3t qu\u00e1 t\u1ed1c \u0111\u1ed9 25 mm\/ph\u00fat \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o \u0111i\u1ec1u ki\u1ec7n \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t, c\u00f3 th\u1ec3 l\u1eb7p l\u1ea1i v\u00e0 tr\u00e1nh c\u00e1c t\u00e1c \u0111\u1ed9ng t\u1ea3i tr\u1ecdng \u0111\u1ed9ng c\u00f3 th\u1ec3 l\u00e0m sai l\u1ec7ch k\u1ebft qu\u1ea3.<\/li>\n
          6. T\u1ea1i sao vi\u1ec7c lo\u1ea1i b\u1ecf ren \u0111\u1ec3 \u0111\u1ea1t dung sai H12 l\u1ea1i quan tr\u1ecdng?<\/strong>
            \nN\u00f3 chu\u1ea9n h\u00f3a \u0111\u01b0\u1eddng k\u00ednh l\u1ed7 ban \u0111\u1ea7u, cho ph\u00e9p \u0111o \u0111\u1ed9 gi\u00e3n n\u1edf m\u1ed9t c\u00e1ch nh\u1ea5t qu\u00e1n v\u00e0 so s\u00e1nh c\u00f4ng b\u1eb1ng gi\u1eefa c\u00e1c m\u1eabu v\u1eadt.<\/li>\n<\/ol>\n<\/div>\n

             <\/p>","protected":false},"excerpt":{"rendered":"

            Introduction to the GB\/T 3098.14-2000 Standard GB\/T 3098.14-2000 specifies the mechanical properties of fasteners, focusing on the nut expansion test. This standard is essential for ensuring the ductility and integrity of nuts under mechanical stress, particularly in industries such as automotive, aerospace, and construction. The test evaluates the nut’s ability to withstand hole expansion without […]<\/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-5694","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\/5694","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=5694"}],"version-history":[{"count":2,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/posts\/5694\/revisions"}],"predecessor-version":[{"id":5696,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/posts\/5694\/revisions\/5696"}],"wp:attachment":[{"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/media?parent=5694"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/categories?post=5694"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/tags?post=5694"}],"curies":[{"name":"trang web","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}