{"id":5903,"date":"2025-12-26T01:19:15","date_gmt":"2025-12-26T01:19:15","guid":{"rendered":"https:\/\/korea-transmission.com\/?p=5903"},"modified":"2025-12-26T01:19:15","modified_gmt":"2025-12-26T01:19:15","slug":"cold-heading-screw-manufacturing-guide","status":"publish","type":"post","link":"https:\/\/korea-transmission.com\/vi\/blog\/cold-heading-screw-manufacturing-guide\/","title":{"rendered":"H\u01b0\u1edbng d\u1eabn s\u1ea3n xu\u1ea5t v\u00edt d\u1eadp ngu\u1ed9i"},"content":{"rendered":"
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Gi\u1edbi thi\u1ec7u v\u1ec1 quy tr\u00ecnh d\u1eadp ngu\u1ed9i<\/h2>\n

Gia c\u00f4ng d\u1eadp ngu\u1ed9i, hay c\u00f2n g\u1ecdi l\u00e0 t\u1ea1o h\u00ecnh ngu\u1ed9i, l\u00e0 m\u1ed9t quy tr\u00ecnh s\u1ea3n xu\u1ea5t hi\u1ec7u qu\u1ea3 cao \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 s\u1ea3n xu\u1ea5t \u1ed1c v\u00edt v\u00e0 c\u00e1c lo\u1ea1i ph\u1ee5 ki\u1ec7n kh\u00e1c \u1edf nhi\u1ec7t \u0111\u1ed9 ph\u00f2ng. Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y bao g\u1ed3m vi\u1ec7c bi\u1ebfn d\u1ea1ng d\u00e2y kim lo\u1ea1i th\u00f4ng qua m\u1ed9t lo\u1ea1t khu\u00f4n \u0111\u1ec3 t\u1ea1o th\u00e0nh h\u00ecnh d\u1ea1ng mong mu\u1ed1n, mang l\u1ea1i nh\u1eefng \u01b0u \u0111i\u1ec3m nh\u01b0 ti\u1ebft ki\u1ec7m v\u1eadt li\u1ec7u, t\u0103ng c\u01b0\u1eddng \u0111\u1ed9 b\u1ec1n nh\u1edd qu\u00e1 tr\u00ecnh t\u00f4i c\u1ee9ng v\u00e0 dung sai ch\u00ednh x\u00e1c. Tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n nh\u01b0 GB\/T 3098.1 v\u1ec1 t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc c\u1ee7a ph\u1ee5 ki\u1ec7n, gia c\u00f4ng d\u1eadp ngu\u1ed9i r\u1ea5t l\u00fd t\u01b0\u1edfng cho s\u1ea3n xu\u1ea5t h\u00e0ng lo\u1ea1t trong ng\u00e0nh c\u00f4ng nghi\u1ec7p \u00f4 t\u00f4, x\u00e2y d\u1ef1ng v\u00e0 \u0111i\u1ec7n t\u1eed.<\/p>\n

Quy tr\u00ecnh b\u1eaft \u0111\u1ea7u t\u1eeb d\u00e2y th\u00e9p th\u00f4 v\u00e0 tr\u1ea3i qua c\u00e1c b\u01b0\u1edbc \u1ee7, chu\u1ea9n b\u1ecb b\u1ec1 m\u1eb7t, k\u00e9o s\u1ee3i, t\u1ea1o h\u00ecnh, t\u1ea1o ren, x\u1eed l\u00fd nhi\u1ec7t v\u00e0 ho\u00e0n thi\u1ec7n. M\u1ed7i b\u01b0\u1edbc \u0111\u1ec1u r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o s\u1ea3n ph\u1ea9m cu\u1ed1i c\u00f9ng \u0111\u00e1p \u1ee9ng c\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt v\u1ec1 \u0111\u1ed9 b\u1ec1n k\u00e9o, \u0111\u1ed9 c\u1ee9ng v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n. Th\u1ef1c hi\u1ec7n \u0111\u00fang quy tr\u00ecnh s\u1ebd gi\u1ea3m thi\u1ec3u c\u00e1c khuy\u1ebft t\u1eadt nh\u01b0 n\u1ee9t ho\u1eb7c sai l\u1ec7ch k\u00edch th\u01b0\u1edbc, n\u00e2ng cao \u0111\u1ed9 tin c\u1eady trong c\u00e1c \u1ee9ng d\u1ee5ng m\u00e0 s\u1ef1 c\u1ed1 l\u00e0 kh\u00f4ng th\u1ec3 ch\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c.<\/p>\n

H\u01b0\u1edbng d\u1eabn: Ch\u1ecdn v\u1eadt li\u1ec7u d\u1ef1a tr\u00ean y\u00eau c\u1ea7u s\u1eed d\u1ee5ng cu\u1ed1i c\u00f9ng, ch\u1eb3ng h\u1ea1n nh\u01b0 th\u00e9p cacbon th\u1ea5p \u0111\u1ec3 c\u00f3 \u0111\u1ed9 d\u1ebbo ho\u1eb7c th\u00e9p h\u1ee3p kim \u0111\u1ec3 c\u00f3 \u0111\u1ed9 b\u1ec1n cao. Vi\u1ec7c ki\u1ec3m tra ch\u1ea5t l\u01b0\u1ee3ng th\u01b0\u1eddng xuy\u00ean, bao g\u1ed3m ki\u1ec3m tra \u0111\u1ed9 c\u1ee9ng theo ti\u00eau chu\u1ea9n GB\/T 230.1, l\u00e0 r\u1ea5t c\u1ea7n thi\u1ebft trong su\u1ed1t qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t.<\/p>\n<\/section>\n

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\u1ee6 nhi\u1ec7t<\/h2>\n

Qu\u00e1 tr\u00ecnh \u1ee7 l\u00e0m m\u1ec1m d\u00e2y th\u00e9p b\u1eb1ng c\u00e1ch nung n\u00f3ng \u0111\u1ebfn m\u1ed9t nhi\u1ec7t \u0111\u1ed9 nh\u1ea5t \u0111\u1ecbnh, gi\u1eef \u1edf nhi\u1ec7t \u0111\u1ed9 \u0111\u00f3 v\u00e0 l\u00e0m ngu\u1ed9i t\u1eeb t\u1eeb \u0111\u1ec3 \u0111i\u1ec1u ch\u1ec9nh c\u1ea5u tr\u00fac tinh th\u1ec3, gi\u1ea3m \u0111\u1ed9 c\u1ee9ng v\u00e0 c\u1ea3i thi\u1ec7n kh\u1ea3 n\u0103ng gia c\u00f4ng \u1edf nhi\u1ec7t \u0111\u1ed9 ph\u00f2ng. B\u01b0\u1edbc n\u00e0y r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi c\u00e1c v\u1eadt li\u1ec7u nh\u01b0 th\u00e9p 1018, 1022, 10B21, 1039 v\u00e0 CH38F.<\/p>\n

Quy tr\u00ecnh: Cho t\u1ed1i \u0111a 7 cu\u1ed9n d\u00e2y (kho\u1ea3ng 1,2 t\u1ea5n m\u1ed7i cu\u1ed9n) v\u00e0o l\u00f2 nung, ni\u00eam phong k\u00edn. Gia nhi\u1ec7t d\u1ea7n trong 3-4 gi\u1edd \u0111\u1ebfn 680-715\u00b0C \u0111\u1ed1i v\u1edbi lo\u1ea1i 1018\/1022 ho\u1eb7c 740-760\u00b0C \u0111\u1ed1i v\u1edbi c\u00e1c lo\u1ea1i kh\u00e1c, gi\u1eef \u1edf nhi\u1ec7t \u0111\u1ed9 n\u00e0y trong 4-7,5 gi\u1edd, sau \u0111\u00f3 l\u00e0m ngu\u1ed9i ch\u1eadm trong 3-4 gi\u1edd xu\u1ed1ng d\u01b0\u1edbi 550\u00b0C, ti\u1ebfp theo l\u00e0 l\u00e0m ngu\u1ed9i l\u00f2 \u0111\u1ebfn nhi\u1ec7t \u0111\u1ed9 ph\u00f2ng.<\/p>\n

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  • Ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng: \u0110\u1ed9 c\u1ee9ng sau khi \u1ee7 ph\u1ea3i \u0111\u1ea1t HV120-170 \u0111\u1ed1i v\u1edbi th\u00e9p cacbon th\u1ea5p v\u00e0 HV120-180 \u0111\u1ed1i v\u1edbi th\u00e9p cacbon trung b\u00ecnh. B\u1ec1 m\u1eb7t ph\u1ea3i kh\u00f4ng c\u00f3 l\u1edbp m\u00e0ng oxit ho\u1eb7c hi\u1ec7n t\u01b0\u1ee3ng kh\u1eed cacbon.<\/li>\n
  • H\u01b0\u1edbng d\u1eabn: Gi\u00e1m s\u00e1t \u0111\u1ed9 \u0111\u1ed3ng \u0111\u1ec1u nhi\u1ec7t \u0111\u1ed9 \u0111\u1ec3 tr\u00e1nh hi\u1ec7n t\u01b0\u1ee3ng l\u00e0m m\u1ec1m kh\u00f4ng \u0111\u1ec1u, c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn c\u00e1c khuy\u1ebft t\u1eadt trong qu\u00e1 tr\u00ecnh t\u1ea1o h\u00ecnh. Tu\u00e2n th\u1ee7 ti\u00eau chu\u1ea9n GB\/T 699 d\u00e0nh cho th\u00e9p k\u1ebft c\u1ea5u carbon cao c\u1ea5p.<\/li>\n<\/ul>\n

    Qu\u00e1 tr\u00ecnh n\u00e0y gi\u00fap t\u0103ng c\u01b0\u1eddng t\u00ednh d\u1ebbo, gi\u1ea3m nguy c\u01a1 n\u1ee9t v\u1ee1 trong c\u00e1c b\u01b0\u1edbc bi\u1ebfn d\u1ea1ng ngu\u1ed9i ti\u1ebfp theo.<\/p>\n<\/section>\n

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    Ng\u00e2m chua<\/h2>\n

    Qu\u00e1 tr\u00ecnh t\u1ea9y g\u1ec9 lo\u1ea1i b\u1ecf l\u1edbp m\u00e0ng oxit tr\u00ean b\u1ec1 m\u1eb7t d\u00e2y v\u00e0 t\u1ea1o th\u00e0nh l\u1edbp ph\u1ee7 ph\u1ed1t ph\u00e1t \u0111\u1ec3 gi\u1ea3m thi\u1ec3u m\u00e0i m\u00f2n d\u1ee5ng c\u1ee5 trong qu\u00e1 tr\u00ecnh k\u00e9o v\u00e0 t\u1ea1o h\u00ecnh. X\u1eed l\u00fd h\u00f3a h\u1ecdc n\u00e0y r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi ch\u1ea5t l\u01b0\u1ee3ng b\u1ec1 m\u1eb7t v\u00e0 kh\u1ea3 n\u0103ng b\u00f4i tr\u01a1n.<\/p>\n

    Quy tr\u00ecnh: Ng\u00e2m trong b\u1ec3 axit clohydric 20-25% trong v\u00e0i ph\u00fat \u0111\u1ec3 lo\u1ea1i b\u1ecf oxit, r\u1eeda s\u1ea1ch b\u1eb1ng n\u01b0\u1edbc, x\u1eed l\u00fd b\u1eb1ng axit oxalic \u0111\u1ec3 ho\u1ea1t h\u00f3a kim lo\u1ea1i, b\u00f4i dung d\u1ecbch photphat \u0111\u1ec3 t\u1ea1o m\u00e0ng Zn2Fe(PO4)2\u00b74H2O, r\u1eeda l\u1ea1i l\u1ea7n n\u1eefa v\u00e0 b\u00f4i ch\u1ea5t b\u00f4i tr\u01a1n nh\u01b0 natri stearat \u0111\u1ec3 t\u0103ng c\u01b0\u1eddng kh\u1ea3 n\u0103ng b\u00f4i tr\u01a1n.<\/p>\n

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    • H\u01b0\u1edbng d\u1eabn: Ki\u1ec3m so\u00e1t th\u1eddi gian ng\u00e2m \u0111\u1ec3 tr\u00e1nh \u0103n m\u00f2n qu\u00e1 m\u1ee9c, \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 l\u00e0m y\u1ebfu d\u00e2y d\u1eabn. \u0110\u1ea3m b\u1ea3o tu\u00e2n th\u1ee7 c\u00e1c quy \u0111\u1ecbnh v\u1ec1 m\u00f4i tr\u01b0\u1eddng b\u1eb1ng c\u00e1ch x\u1eed l\u00fd n\u01b0\u1edbc th\u1ea3i theo quy \u0111\u1ecbnh c\u1ee7a ng\u00e0nh.<\/li>\n
    • L\u1ee3i \u00edch: L\u1edbp ph\u1ed1t ph\u00e1t l\u00e0m gi\u1ea3m ma s\u00e1t, k\u00e9o d\u00e0i tu\u1ed5i th\u1ecd khu\u00f4n v\u00e0 c\u1ea3i thi\u1ec7n \u0111\u1ed9 nh\u1eb5n b\u1ec1 m\u1eb7t.<\/li>\n<\/ul>\n

      Qu\u00e1 tr\u00ecnh t\u1ea9y g\u1ec9 \u0111\u00fang c\u00e1ch \u0111\u1ea3m b\u1ea3o l\u1edbp ph\u1ee7 \u0111\u1ed3ng \u0111\u1ec1u, \u0111i\u1ec1u r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c hi\u1ec7u su\u1ea5t \u1ed5n \u0111\u1ecbnh trong s\u1ea3n xu\u1ea5t quy m\u00f4 l\u1edbn.<\/p>\n<\/section>\n

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      V\u1ebd d\u00e2y<\/h2>\n

      Qu\u00e1 tr\u00ecnh k\u00e9o d\u00e2y l\u00e0m gi\u1ea3m \u0111\u01b0\u1eddng k\u00ednh cu\u1ed9n d\u00e2y xu\u1ed1ng k\u00edch th\u01b0\u1edbc y\u00eau c\u1ea7u th\u00f4ng qua k\u00e9o ngu\u1ed9i, th\u01b0\u1eddng \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n theo c\u00e1c giai \u0111o\u1ea1n th\u00f4 v\u00e0 tinh ch\u1ec9nh \u0111\u1ed1i v\u1edbi m\u1ed9t s\u1ed1 s\u1ea3n ph\u1ea9m nh\u1ea5t \u0111\u1ecbnh. B\u01b0\u1edbc n\u00e0y chu\u1ea9n b\u1ecb d\u00e2y cho qu\u00e1 tr\u00ecnh t\u1ea1o h\u00ecnh b\u1eb1ng c\u00e1ch \u0111\u1ea1t \u0111\u01b0\u1ee3c k\u00edch th\u01b0\u1edbc ch\u00ednh x\u00e1c.<\/p>\n

      Quy tr\u00ecnh: Sau khi t\u1ea9y g\u1ec9, k\u00e9o cu\u1ed9n th\u00e9p qua khu\u00f4n \u0111\u1ebfn \u0111\u01b0\u1eddng k\u00ednh m\u1ee5c ti\u00eau. \u0110\u1ed1i v\u1edbi c\u00e1c lo\u1ea1i v\u00edt, \u0111ai \u1ed1c ho\u1eb7c thanh th\u00e9p l\u1edbn, h\u00e3y s\u1eed d\u1ee5ng m\u00e1y k\u00e9o chuy\u00ean d\u1ee5ng.<\/p>\n

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      • H\u01b0\u1edbng d\u1eabn: Duy tr\u00ec t\u1ef7 l\u1ec7 gi\u1ea3m \u0111\u1ed9 d\u00e0y t\u1eeb 10-15% m\u1ed7i l\u1ea7n gia c\u00f4ng \u0111\u1ec3 tr\u00e1nh hi\u1ec7n t\u01b0\u1ee3ng c\u1ee9ng h\u00f3a qu\u00e1 m\u1ee9c ho\u1eb7c n\u1ee9t v\u1ee1. B\u00f4i tr\u01a1n l\u00e0 y\u1ebfu t\u1ed1 quan tr\u1ecdng \u0111\u1ec3 ng\u0103n ng\u1eeba c\u00e1c khuy\u1ebft t\u1eadt b\u1ec1 m\u1eb7t.<\/li>\n
      • Ti\u00eau chu\u1ea9n: Ph\u00f9 h\u1ee3p v\u1edbi ti\u00eau chu\u1ea9n GB\/T 6478 d\u00e0nh cho th\u00e9p c\u00e1n ngu\u1ed9i, \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 gi\u00e3n d\u00e0i v\u00e0 \u0111\u1ed9 b\u1ec1n k\u00e9o \u0111\u00e1p \u1ee9ng y\u00eau c\u1ea7u t\u1ea1o h\u00ecnh.<\/li>\n<\/ul>\n

        K\u1ef9 thu\u1eadt k\u00e9o s\u1ee3i hi\u1ec7u qu\u1ea3 gi\u00fap t\u0103ng c\u01b0\u1eddng \u0111\u1ed9 b\u1ec1n v\u1eadt li\u1ec7u th\u00f4ng qua bi\u1ebfn d\u1ea1ng \u0111\u1ed3ng th\u1eddi v\u1eabn gi\u1eef \u0111\u01b0\u1ee3c \u0111\u1ed9 d\u1ebbo cho qu\u00e1 tr\u00ecnh d\u1eadp ngu\u1ed9i.<\/p>\n<\/section>\n

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        H\u00ecnh th\u00e0nh<\/h2>\n

        C\u00f4ng \u0111o\u1ea1n t\u1ea1o h\u00ecnh \u0111\u1ecbnh h\u00ecnh d\u00e2y th\u00e9p th\u00e0nh c\u00e1c v\u00edt b\u00e1n th\u00e0nh ph\u1ea9m b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p r\u00e8n ngu\u1ed9i ho\u1eb7c r\u00e8n n\u00f3ng, \u0111\u1ea1t \u0111\u01b0\u1ee3c h\u00ecnh d\u1ea1ng v\u00e0 k\u00edch th\u01b0\u1edbc mong mu\u1ed1n. B\u01b0\u1edbc c\u1ed1t l\u00f5i n\u00e0y s\u1eed d\u1ee5ng m\u00e1y m\u00f3c nhi\u1ec1u tr\u1ea1m \u0111\u1ec3 t\u0103ng hi\u1ec7u qu\u1ea3.<\/p>\n

        \u0110\u1ed1i v\u1edbi bu l\u00f4ng l\u1ee5c gi\u00e1c (quy tr\u00ecnh b\u1ed1n ho\u1eb7c ba khu\u00f4n): C\u1eaft ph\u00f4i, \u00e9p ban \u0111\u1ea7u, t\u1ea1o h\u00ecnh th\u1ee9 c\u1ea5p, c\u1eaft t\u1ec9a l\u1ee5c gi\u00e1c. \u0110\u1ed1i v\u1edbi v\u00edt: C\u1eaft, t\u1ea1o h\u00ecnh \u0111\u1ea7u s\u01a1 b\u1ed9, t\u1ea1o h\u00ecnh cu\u1ed1i c\u00f9ng. Gia c\u00f4ng n\u00f3ng trong 7-15 gi\u00e2y \u0111\u1ed1i v\u1edbi k\u00edch th\u01b0\u1edbc l\u1edbn h\u01a1n, sau \u0111\u00f3 gi\u1ea3m \u0111\u01b0\u1eddng k\u00ednh th\u00e2n v\u00edt.<\/p>\n

        T\u1ea1o h\u00ecnh \u0111ai \u1ed1c: C\u1eaft, t\u1ea1o h\u00ecnh ban \u0111\u1ea7u b\u1eb1ng nhi\u1ec1u m\u0169i \u0111\u1ed9t, \u0111\u1ee5c l\u1ed7 cu\u1ed1i c\u00f9ng.<\/p>\n

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        • H\u01b0\u1edbng d\u1eabn: S\u1eed d\u1ee5ng khu\u00f4n d\u1eadp c\u00f3 \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t Ra \u22640,2 \u03bcm \u0111\u1ec3 \u0111\u1ea1t \u0111\u1ed9 ch\u00ednh x\u00e1c cao. L\u1eafp \u0111\u1eb7t thi\u1ebft b\u1ecb \u0111\u1ea9y ph\u00f4i \u0111\u1ec3 tr\u00e1nh k\u1eb9t ph\u00f4i. Ki\u1ec3m so\u00e1t g\u00f3c l\u1eadt \u0111\u1ed1i v\u1edbi c\u00e1c h\u00ecnh d\u1ea1ng ph\u1ee9c t\u1ea1p.<\/li>\n
        • Ti\u00eau chu\u1ea9n: Theo ti\u00eau chu\u1ea9n ISO 898, \u0111\u1ea3m b\u1ea3o t\u00ednh li\u00ean t\u1ee5c c\u1ee7a d\u00f2ng s\u1ee3i \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c \u0111\u1ed9 b\u1ec1n.<\/li>\n<\/ul>\n

          Quy tr\u00ecnh n\u00e0y t\u1ed1i \u01b0u h\u00f3a vi\u1ec7c s\u1eed d\u1ee5ng v\u1eadt li\u1ec7u, t\u1ea1o ra c\u00e1c b\u1ed9 ph\u1eadn c\u00f3 t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc v\u01b0\u1ee3t tr\u1ed9i so v\u1edbi c\u00e1c ph\u01b0\u01a1ng ph\u00e1p gia c\u00f4ng c\u01a1 kh\u00ed truy\u1ec1n th\u1ed1ng.<\/p>\n<\/section>\n

          \n

          Lu\u1ed3ng<\/h2>\n

          Gia c\u00f4ng ren t\u1ea1o ra c\u00e1c ren tr\u00ean c\u00e1c chi ti\u1ebft b\u00e1n th\u00e0nh ph\u1ea9m b\u1eb1ng c\u00e1ch c\u00e1n ho\u1eb7c taro, t\u1ea1o ra h\u00ecnh d\u1ea1ng ren ch\u1ee9c n\u0103ng. \u0110i\u1ec1u n\u00e0y gi\u00fap t\u0103ng c\u01b0\u1eddng \u0111\u1ed9 b\u1ec1n th\u00f4ng qua bi\u1ebfn d\u1ea1ng d\u1ebbo.<\/p>\n

          Quy tr\u00ecnh: D\u00f9ng m\u00e1y c\u00e1n ren \u0111\u1ec3 t\u1ea1o ren cho bu l\u00f4ng v\u00e0 t\u1ea5m \u0111\u1ecbnh v\u1ecb; d\u00f9ng m\u00e1y taro \u0111\u1ec3 t\u1ea1o ren cho \u0111ai \u1ed1c; d\u00f9ng m\u00e1y c\u00e1n ren \u0111\u1ec3 t\u1ea1o ren cho thanh. T\u1ed1i \u01b0u h\u00f3a s\u1ed1 v\u00f2ng quay \u0111\u1ec3 tr\u00e1nh c\u00e1c khuy\u1ebft t\u1eadt nh\u01b0 n\u1ee9t ho\u1eb7c bi\u1ebfn d\u1ea1ng kh\u00f4ng \u0111\u1ec1u.<\/p>\n

            \n
          • H\u01b0\u1edbng d\u1eabn: \u0110i\u1ec1u ch\u1ec9nh \u0111\u01b0\u1eddng k\u00ednh ph\u00f4i \u0111\u1ec3 \u0111\u1ea1t \u0111\u1ed9 ch\u00ednh x\u00e1c, c\u00f3 t\u00ednh \u0111\u1ebfn \u1ea3nh h\u01b0\u1edfng c\u1ee7a l\u1edbp m\u1ea1. Ki\u1ec3m tra c\u00e1c v\u1ebft n\u1ee9t b\u1ec1 m\u1eb7t theo ti\u00eau chu\u1ea9n GB\/T 3098.1.<\/li>\n
          • C\u00e1c khuy\u1ebft t\u1eadt th\u01b0\u1eddng g\u1eb7p: V\u1ebft n\u1ee9t, c\u00e1c s\u1ee3i ch\u1ec9 ng\u1eabu nhi\u00ean, h\u00ecnh d\u1ea1ng kh\u00f4ng tr\u00f2n \u0111\u1ec1u \u2014 c\u00f3 th\u1ec3 ki\u1ec3m so\u00e1t th\u00f4ng qua c\u00e1c th\u00f4ng s\u1ed1 quy tr\u00ecnh.<\/li>\n<\/ul>\n

            Qu\u00e1 tr\u00ecnh c\u00e1n ren gi\u00fap b\u1ea3o to\u00e0n c\u1ea5u tr\u00fac h\u1ea1t, c\u1ea3i thi\u1ec7n kh\u1ea3 n\u0103ng ch\u1ed1ng m\u1ecfi trong c\u00e1c \u1ee9ng d\u1ee5ng ch\u1ecbu t\u1ea3i.<\/p>\n<\/section>\n

            \n

            X\u1eed l\u00fd nhi\u1ec7t<\/h2>\n

            X\u1eed l\u00fd nhi\u1ec7t t\u1ed1i \u01b0u h\u00f3a c\u00e1c t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc th\u00f4ng qua qu\u00e1 tr\u00ecnh t\u00f4i v\u00e0 ram, \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh ph\u00f9 h\u1ee3p v\u1edbi v\u1eadt li\u1ec7u v\u00e0 m\u1ee5c \u0111\u00edch s\u1eed d\u1ee5ng: ram \u1edf nhi\u1ec7t \u0111\u1ed9 cao cho th\u00e9p t\u00f4i (500-650\u00b0C), ram trung b\u00ecnh cho l\u00f2 xo (420-520\u00b0C), ram \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p cho th\u00e9p th\u1ea5m cacbon (150-250\u00b0C).<\/p>\n

            Quy tr\u00ecnh \u0111\u1ed1i v\u1edbi th\u00e9p k\u1ebft c\u1ea5u: Chu\u1ea9n h\u00f3a, t\u00f4i \u1edf 850\u00b0C, ram \u1edf 400-500\u00b0C ho\u1eb7c 200\u00b0C \u0111\u1ed1i v\u1edbi th\u00e9p c\u01b0\u1eddng \u0111\u1ed9 cao. \u0110\u1ed1i v\u1edbi l\u00f2 xo: \u200b\u200bT\u00f4i d\u1ea7u \u1edf 830-870\u00b0C, ram \u1edf 420-520\u00b0C. \u0110\u1ed1i v\u1edbi th\u00e9p th\u1ea5m cacbon: Th\u1ea5m cacbon, t\u00f4i, ram \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p.<\/p>\n

              \n
            • H\u01b0\u1edbng d\u1eabn: S\u1eed d\u1ee5ng l\u00f2 nung li\u00ean t\u1ee5c c\u00f3 ki\u1ec3m so\u00e1t kh\u00ed quy\u1ec3n \u0111\u1ec3 ng\u0103n ng\u1eeba hi\u1ec7n t\u01b0\u1ee3ng kh\u1eed cacbon theo ti\u00eau chu\u1ea9n GB\/T 3098.1. Theo d\u00f5i \u0111\u1ed9 c\u1ee9ng \u0111\u1ed3ng \u0111\u1ec1u v\u00e0 tr\u00e1nh n\u1ee9t v\u1ee1.<\/li>\n
            • Nh\u01b0\u1ee3c \u0111i\u1ec3m: \u0110\u1ed9 c\u1ee9ng kh\u00f4ng \u0111\u1ee7, b\u1ec1 m\u1eb7t kh\u00f4ng \u0111\u1ec1u, bi\u1ebfn d\u1ea1ng, n\u1ee9t n\u1ebb \u2014 kh\u1eafc ph\u1ee5c b\u1eb1ng c\u00e1c bi\u1ec7n ph\u00e1p ki\u1ec3m so\u00e1t ch\u00ednh x\u00e1c.<\/li>\n<\/ul>\n

              Thi\u1ebft b\u1ecb ti\u00ean ti\u1ebfn \u0111\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng \u1ed5n \u0111\u1ecbnh, \u0111i\u1ec1u v\u00f4 c\u00f9ng quan tr\u1ecdng \u0111\u1ed1i v\u1edbi c\u00e1c lo\u1ea1i \u1ed1c v\u00edt c\u01b0\u1eddng \u0111\u1ed9 cao.<\/p>\n<\/section>\n

              \n

              X\u1eed l\u00fd b\u1ec1 m\u1eb7t<\/h2>\n

              C\u00e1c ph\u01b0\u01a1ng ph\u00e1p x\u1eed l\u00fd b\u1ec1 m\u1eb7t gi\u00fap t\u0103ng kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n v\u00e0 t\u00ednh th\u1ea9m m\u1ef9: m\u1ea1 \u0111i\u1ec7n (k\u1ebdm, niken, v.v.), m\u1ea1 k\u1ebdm nh\u00fang n\u00f3ng, m\u1ea1 c\u01a1 h\u1ecdc.<\/p>\n

              Ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng: B\u1ec1 ngo\u00e0i kh\u00f4ng c\u00f3 khuy\u1ebft t\u1eadt; \u0111\u1ed9 d\u00e0y 4-12 \u03bcm \u0111\u1ed1i v\u1edbi m\u1ea1 \u0111i\u1ec7n, 43-54 \u03bcm \u0111\u1ed1i v\u1edbi m\u1ea1 nh\u00fang n\u00f3ng; ph\u00e2n b\u1ed1 \u0111\u1ed3ng \u0111\u1ec1u; gi\u1ea3m thi\u1ec3u hi\u1ec7n t\u01b0\u1ee3ng gi\u00f2n hydro b\u1eb1ng c\u00e1ch nung \u1edf 176-190\u00b0C trong 3-24 gi\u1edd; ki\u1ec3m tra \u0111\u1ed9 b\u00e1m d\u00ednh.<\/p>\n

                \n
              • H\u01b0\u1edbng d\u1eabn: Nung n\u00f3ng c\u00e1c chi ti\u1ebft c\u00f3 \u0111\u1ed9 c\u1ee9ng cao ngay l\u1eadp t\u1ee9c \u0111\u1ec3 tr\u00e1nh b\u1ecb gi\u00f2n. Tu\u00e2n th\u1ee7 ti\u00eau chu\u1ea9n ISO 4042 \u0111\u1ed1i v\u1edbi l\u1edbp ph\u1ee7 m\u1ea1 \u0111i\u1ec7n.<\/li>\n<\/ul>\n

                C\u00e1c ph\u01b0\u01a1ng ph\u00e1p x\u1eed l\u00fd n\u00e0y gi\u00fap k\u00e9o d\u00e0i tu\u1ed5i th\u1ecd s\u1ea3n ph\u1ea9m trong m\u00f4i tr\u01b0\u1eddng \u0103n m\u00f2n.<\/p>\n<\/section>\n

                \n

                Th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a bu l\u00f4ng c\u01b0\u1eddng \u0111\u1ed9 cao<\/h2>\n

                Quy tr\u00ecnh s\u1ea3n xu\u1ea5t bu l\u00f4ng c\u01b0\u1eddng \u0111\u1ed9 cao nh\u01b0 sau: D\u00e2y c\u00e1n n\u00f3ng \u2013 k\u00e9o s\u1ee3i \u2013 \u1ee7 c\u1ea7u h\u00f3a \u2013 t\u1ea9y g\u1ec9 c\u01a1 h\u1ecdc \u2013 t\u1ea9y g\u1ec9 \u2013 k\u00e9o s\u1ee3i \u2013 r\u00e8n ngu\u1ed9i \u2013 t\u1ea1o ren \u2013 x\u1eed l\u00fd nhi\u1ec7t \u2013 ki\u1ec3m tra.<\/p>\n

                Thi\u1ebft k\u1ebf v\u1eadt li\u1ec7u: C 0,25-0,55%, Mn 0,45-0,80%, Si \u22640,30%, P\/S \u22640,030\/0,035%, B \u22640,005% theo ti\u00eau chu\u1ea9n GB\/T 6478 v\u00e0 JIS G3507.<\/p>\n

                Qu\u00e1 tr\u00ecnh c\u1ea7u h\u00f3a: Nung n\u00f3ng \u0111\u1ebfn Ac1 +20-30\u00b0C, l\u00e0m ngu\u1ed9i \u0111\u1eb3ng nhi\u1ec7t \u0111\u1ebfn ~700\u00b0C, sau \u0111\u00f3 l\u00e0m ngu\u1ed9i ti\u1ebfp \u0111\u1ebfn 500\u00b0C. \u0110\u1ed1i v\u1edbi th\u00e9p 35\/45: 715-735\u00b0C; SCM435: 740-770\u00b0C, \u0111\u1eb3ng nhi\u1ec7t 680-700\u00b0C.<\/p>\n

                T\u1ea9y c\u1eb7n: Ph\u01b0\u01a1ng ph\u00e1p c\u01a1 h\u1ecdc (u\u1ed1n\/phun) + t\u1ea9y g\u1ec9 \u0111\u1ed1i v\u1edbi lo\u1ea1i >8.8.<\/p>\n

                R\u00fat th\u01b0\u1edbc: \u0110\u1ed9 gi\u1ea3m 10-15% m\u1ed7i l\u1ea7n r\u00fat \u0111\u1ec3 gi\u1ea3m thi\u1ec3u hi\u1ec7n t\u01b0\u1ee3ng c\u1ee9ng l\u1ea1i.<\/p>\n

                Gia c\u00f4ng: Khu\u00f4n d\u1eadp ch\u00ednh x\u00e1c nhi\u1ec1u tr\u1ea1m.<\/p>\n

                Lu\u1ed3n ch\u1ec9: Lu\u1ed3n ch\u1ec9 \u0111\u1ec3 t\u0103ng \u0111\u1ed9 ch\u1eafc ch\u1eafn.<\/p>\n

                X\u1eed l\u00fd nhi\u1ec7t: D\u00e2y chuy\u1ec1n t\u1ef1 \u0111\u1ed9ng \u0111\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng.<\/p>\n

                  \n
                • H\u01b0\u1edbng d\u1eabn: \u0110i\u1ec1u ch\u1ec9nh t\u1ed1i \u01b0u cho c\u00e1c c\u1ea5p \u0111\u1ed9 8.8\/9.8 \u0111\u1ec3 c\u00e2n b\u1eb1ng \u0111\u1ed9 b\u1ec1n v\u00e0 \u0111\u1ed9 d\u1ebbo theo ti\u00eau chu\u1ea9n ISO 898-1.<\/li>\n<\/ul>\n<\/section>\n
                  \n

                  S\u01a1 \u0111\u1ed3 v\u00e0 h\u00ecnh \u1ea3nh s\u1ea3n xu\u1ea5t<\/h2>\n

                  H\u00ecnh \u1ea3nh minh h\u1ecda th\u1ec3 hi\u1ec7n c\u00e1c giai \u0111o\u1ea1n h\u00ecnh th\u00e0nh quan tr\u1ecdng:<\/p>\n

                  \n\n\n\n\n\n\n\n\n\n
                  S\u00e2n kh\u1ea5u<\/th>\nS\u1ef1 mi\u00eau t\u1ea3<\/th>\n<\/tr>\n<\/thead>\n
                  T\u1ea1o h\u00ecnh \u0111\u1ea7u<\/td>\nBi\u1ebfn d\u1ea1ng ban \u0111\u1ea7u \u0111\u1ec3 t\u1ea1o h\u00ecnh ph\u1ea7n \u0111\u1ea7u.<\/td>\n<\/tr>\n
                  M\u1ed9t con x\u00fac x\u1eafc, hai c\u00fa \u0111\u1ea5m<\/td>\nT\u1ea1o h\u00ecnh s\u01a1 b\u1ed9 cho h\u00ecnh d\u1ea1ng c\u01a1 b\u1ea3n.<\/td>\n<\/tr>\n
                  Hai con x\u00fac x\u1eafc, ba c\u00fa \u0111\u1ea5m<\/td>\nC\u00f4ng ngh\u1ec7 t\u1ea1o h\u00ecnh ti\u00ean ti\u1ebfn cho c\u00e1c \u0111\u1ea7u c\u00f3 c\u1ea5u tr\u00fac ph\u1ee9c t\u1ea1p.<\/td>\n<\/tr>\n
                  C\u1eaft t\u1ec9a l\u1ee5c gi\u00e1c<\/td>\nC\u1eaft th\u00e0nh h\u00ecnh l\u1ee5c gi\u00e1c.<\/td>\n<\/tr>\n
                  T\u1ea1o h\u00ecnh c\u00e1n<\/td>\nGi\u1ea3m \u0111\u01b0\u1eddng k\u00ednh cho ph\u1ea7n chu\u00f4i.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

                  C\u00e1c giai \u0111o\u1ea1n n\u00e0y, th\u01b0\u1eddng \u0111\u01b0\u1ee3c minh h\u1ecda b\u1eb1ng ho\u1ea1t h\u00ecnh, th\u1ec3 hi\u1ec7n s\u1ef1 bi\u1ebfn d\u1ea1ng d\u1ea7n d\u1ea7n. Video cho th\u1ea5y qu\u00e1 tr\u00ecnh t\u1ea1o h\u00ecnh v\u00e0 lu\u1ed3n ch\u1ec9 di\u1ec5n ra trong th\u1eddi gian th\u1ef1c, l\u00e0m n\u1ed5i b\u1eadt \u0111\u1ed9 ch\u00ednh x\u00e1c v\u00e0 t\u1ed1c \u0111\u1ed9.<\/p>\n<\/section>\n

                  \n

                  C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n

                  Qu\u00e1 tr\u00ecnh \u1ee7 nhi\u1ec7t trong s\u1ea3n xu\u1ea5t v\u00edt c\u00f3 m\u1ee5c \u0111\u00edch g\u00ec?<\/h3>\n

                  Qu\u00e1 tr\u00ecnh \u1ee7 nhi\u1ec7t l\u00e0m gi\u1ea3m \u0111\u1ed9 c\u1ee9ng v\u00e0 c\u1ea3i thi\u1ec7n \u0111\u1ed9 d\u1ebbo, ng\u0103n ng\u1eeba n\u1ee9t v\u1ee1 trong qu\u00e1 tr\u00ecnh d\u1eadp ngu\u1ed9i. Ki\u1ec3m so\u00e1t nhi\u1ec7t \u0111\u1ed9 cho t\u1eebng lo\u1ea1i v\u1eadt li\u1ec7u \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c c\u1ea5u tr\u00fac vi m\u00f4 t\u1ed1i \u01b0u.<\/p>\n

                   <\/p>\n

                  Qu\u00e1 tr\u00ecnh ng\u00e2m t\u1ea9m \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ch\u1ea5t l\u01b0\u1ee3ng b\u1ec1 m\u1eb7t nh\u01b0 th\u1ebf n\u00e0o?<\/h3>\n

                  N\u00f3 lo\u1ea1i b\u1ecf oxit v\u00e0 b\u1ed5 sung ph\u1ed1t ph\u00e1t \u0111\u1ec3 b\u00f4i tr\u01a1n, gi\u1ea3m m\u00e0i m\u00f2n. Gi\u1ea3m thi\u1ec3u ti\u1ebfp x\u00fac v\u1edbi axit \u0111\u1ec3 tr\u00e1nh nguy c\u01a1 h\u1ea5p th\u1ee5 hydro.<\/p>\n

                   <\/p>\n

                  T\u1ea1i sao t\u1ef7 l\u1ec7 gi\u1ea3m \u0111\u1ed9 d\u00e0y d\u00e2y khi k\u00e9o s\u1ee3i l\u1ea1i quan tr\u1ecdng?<\/h3>\n

                  \u0110\u1ed9 d\u00e0y 10-15% m\u1ed7i l\u1ea7n c\u1eaft gi\u00fap c\u00e2n b\u1eb1ng gi\u1eefa \u0111\u1ed9 b\u1ec1n v\u00e0 \u0111\u1ed9 d\u1ebbo. Vi\u1ec7c c\u1eaft qu\u00e1 m\u1ee9c s\u1ebd g\u00e2y ra n\u1ee9t; c\u1ea7n theo d\u00f5i \u0111\u01b0\u1eddng k\u00ednh \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 \u0111\u1ed3ng \u0111\u1ec1u.<\/p>\n

                   <\/p>\n

                  Nguy\u00ean nh\u00e2n n\u00e0o g\u00e2y ra c\u00e1c l\u1ed7i th\u01b0\u1eddng g\u1eb7p trong qu\u00e1 tr\u00ecnh ti\u1ec7n ren?<\/h3>\n

                  C\u00e1n qu\u00e1 m\u1ee9c d\u1eabn \u0111\u1ebfn n\u1ee9t; c\u00e1n ch\u01b0a \u0111\u1ee7 d\u1eabn \u0111\u1ebfn bi\u1ebfn d\u1ea1ng tr\u00f2n. T\u1ed1i \u01b0u h\u00f3a s\u1ed1 v\u00f2ng quay v\u00e0 k\u00edch th\u01b0\u1edbc ph\u00f4i theo ti\u00eau chu\u1ea9n ISO.<\/p>\n

                   <\/p>\n

                  L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 ng\u0103n ng\u1eeba hi\u1ec7n t\u01b0\u1ee3ng kh\u1eed cacbon trong qu\u00e1 tr\u00ecnh x\u1eed l\u00fd nhi\u1ec7t?<\/h3>\n

                  S\u1eed d\u1ee5ng m\u00f4i tr\u01b0\u1eddng b\u1ea3o v\u1ec7 trong l\u00f2 nung. Ki\u1ec3m tra theo ti\u00eau chu\u1ea9n GB\/T 3098.1 \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 c\u1ee9ng b\u1ec1 m\u1eb7t \u0111\u00e1p \u1ee9ng y\u00eau c\u1ea7u.<\/p>\n

                   <\/p>\n

                  Nh\u1eefng v\u1eadt li\u1ec7u n\u00e0o l\u00e0 t\u1ed1t nh\u1ea5t cho bu l\u00f4ng c\u01b0\u1eddng \u0111\u1ed9 cao?<\/h3>\n

                  H\u1ee3p kim cacbon trung b\u00ecnh v\u1edbi c\u00e1c nguy\u00ean t\u1ed1 \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t nh\u01b0 C 0,25-0,55%, Mn 0,45-0,80%. L\u1ef1a ch\u1ecdn theo ti\u00eau chu\u1ea9n JIS G3507 cho kh\u1ea3 n\u0103ng gia c\u00f4ng ngu\u1ed9i.<\/p>\n<\/section>\n<\/article>\n

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

                  Introduction to Cold Heading Process Cold heading, also known as cold forming, is a high-efficiency manufacturing process used to produce screws and other fasteners at room temperature. This method involves deforming metal wire through a series of dies to form the desired shape, offering advantages such as material savings, enhanced strength due to work hardening, […]<\/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-5903","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\/5903","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=5903"}],"version-history":[{"count":2,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/posts\/5903\/revisions"}],"predecessor-version":[{"id":5905,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/posts\/5903\/revisions\/5905"}],"wp:attachment":[{"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/media?parent=5903"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/categories?post=5903"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/tags?post=5903"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}