{"id":5852,"date":"2025-12-25T03:29:22","date_gmt":"2025-12-25T03:29:22","guid":{"rendered":"https:\/\/korea-transmission.com\/?p=5852"},"modified":"2025-12-25T03:29:22","modified_gmt":"2025-12-25T03:29:22","slug":"din-912-hex-socket-cap-screws-specs-uses","status":"publish","type":"post","link":"https:\/\/korea-transmission.com\/vi\/blog\/din-912-hex-socket-cap-screws-specs-uses\/","title":{"rendered":"Th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt v\u00e0 \u1ee9ng d\u1ee5ng c\u1ee7a \u1ed1c v\u00edt l\u1ee5c gi\u00e1c \u0111\u1ea7u ch\u00ecm DIN 912"},"content":{"rendered":"

Gi\u1edbi thi\u1ec7u v\u1ec1 \u1ed1c v\u00edt l\u1ee5c gi\u00e1c \u0111\u1ea7u ch\u00ecm ti\u00eau chu\u1ea9n DIN 912<\/h2>\n
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Ti\u00eau chu\u1ea9n DIN 912 quy \u0111\u1ecbnh lo\u1ea1i v\u00edt \u0111\u1ea7u l\u1ee5c gi\u00e1c c\u00f3 \u0111\u1ea7u h\u00ecnh tr\u1ee5, \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong k\u1ef9 thu\u1eadt c\u01a1 kh\u00ed nh\u1edd \u0111\u1ed9 b\u1ec1n cao v\u00e0 kh\u1ea3 n\u0103ng si\u1ebft ch\u1eb7t ch\u00ednh x\u00e1c. Lo\u1ea1i v\u00edt n\u00e0y c\u00f3 \u0111\u1ea7u h\u00ecnh tr\u1ee5 v\u1edbi r\u00e3nh l\u1ee5c gi\u00e1c b\u00ean trong, cho ph\u00e9p t\u1ea1o ra momen xo\u1eafn cao trong kh\u00f4ng gian h\u1eb9p. Ti\u00eau chu\u1ea9n n\u00e0y c\u0169ng t\u01b0\u01a1ng th\u00edch m\u1ed9t ph\u1ea7n v\u1edbi ti\u00eau chu\u1ea9n GB 70 c\u1ee7a Trung Qu\u1ed1c, \u0111\u1ea3m b\u1ea3o t\u00ednh t\u01b0\u01a1ng th\u00edch to\u00e0n c\u1ea7u.<\/p>\n

V\u1ec1 h\u00ecnh d\u00e1ng b\u00ean ngo\u00e0i, v\u00edt c\u00f3 \u0111\u1ea7u h\u00ecnh tr\u1ee5 nh\u1eb5n, th\u01b0\u1eddng c\u00f3 c\u00e1c \u0111\u01b0\u1eddng v\u00e2n \u0111\u1ec3 t\u0103ng \u0111\u1ed9 b\u00e1m khi thao t\u00e1c b\u1eb1ng tay, m\u1eb7c d\u00f9 c\u0169ng c\u00f3 c\u00e1c phi\u00ean b\u1ea3n kh\u00f4ng c\u00f3 v\u00e2n d\u00e0nh cho c\u00e1c y\u00eau c\u1ea7u th\u1ea9m m\u1ef9 ho\u1eb7c ch\u1ee9c n\u0103ng c\u1ee5 th\u1ec3. \u0110\u1ea7u c\u00f3 v\u00e2n gi\u00fap vi\u1ec7c l\u1eafp r\u00e1p d\u1ec5 d\u00e0ng h\u01a1n, gi\u1ea3m hi\u1ec7n t\u01b0\u1ee3ng tr\u01b0\u1ee3t. L\u00e0 lo\u1ea1i v\u00edt l\u1ee5c gi\u00e1c ph\u1ed5 bi\u1ebfn nh\u1ea5t, v\u00edt DIN 912 r\u1ea5t c\u1ea7n thi\u1ebft trong c\u00e1c c\u1ee5m l\u1eafp r\u00e1p y\u00eau c\u1ea7u l\u1eafp \u0111\u1eb7t ph\u1eb3ng v\u00e0 l\u1ef1c k\u1eb9p cao.<\/p>\n

V\u1eadt li\u1ec7u th\u01b0\u1eddng bao g\u1ed3m th\u00e9p kh\u00f4ng g\u1ec9 SUS304 v\u00e0 SUS316 \u0111\u1ec3 ch\u1ed1ng \u0103n m\u00f2n, ho\u1eb7c th\u00e9p carbon c\u00e1c lo\u1ea1i 4.8, 8.8 v\u00e0 12.9 v\u1edbi c\u00e1c m\u1ee9c \u0111\u1ed9 b\u1ec1n kh\u00e1c nhau. M\u1ed7i v\u00edt \u0111\u1ec1u tr\u1ea3i qua qu\u00e1 tr\u00ecnh ki\u1ec3m tra nghi\u00eam ng\u1eb7t, bao g\u1ed3m c\u1ea3 ki\u1ec3m tra \u0111\u1ea1t\/kh\u00f4ng \u0111\u1ea1t b\u1eb1ng th\u01b0\u1edbc \u0111o \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 \u0111\u1ed3ng nh\u1ea5t c\u1ee7a ren. Ph\u1ea7n gi\u1edbi thi\u1ec7u n\u00e0y \u0111\u1eb7t n\u1ec1n t\u1ea3ng cho vi\u1ec7c hi\u1ec3u vai tr\u00f2 c\u1ee7a ch\u00fang trong c\u00e1c k\u1ebft n\u1ed1i c\u01a1 kh\u00ed \u0111\u00e1ng tin c\u1eady, nh\u1ea5n m\u1ea1nh vi\u1ec7c tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n v\u1ec1 an to\u00e0n v\u00e0 hi\u1ec7u su\u1ea5t.<\/p>\n

<\/div>\n<\/div>\n

\u0110\u1eb7c \u0111i\u1ec3m thi\u1ebft k\u1ebf v\u00e0 c\u00e1c bi\u1ebfn th\u1ec3<\/h2>\n
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\u1ed0c v\u00edt DIN 912 c\u00f3 \u0111\u1eb7c \u0111i\u1ec3m l\u00e0 \u0111\u1ea7u h\u00ecnh tr\u1ee5, t\u1ea1o ra b\u1ec1 m\u1eb7t ho\u00e0n thi\u1ec7n g\u1ecdn g\u00e0ng, m\u1ecfng, ph\u00f9 h\u1ee3p cho m\u00e1y c\u00f4ng c\u1ee5 v\u00e0 c\u00e1c b\u1ed9 ph\u1eadn \u00f4 t\u00f4. \u1ed4 l\u1ee5c gi\u00e1c b\u00ean trong cho ph\u00e9p truy\u1ec1n m\u00f4-men xo\u1eafn hi\u1ec7u qu\u1ea3 b\u1eb1ng c\u1edd l\u00ea l\u1ee5c gi\u00e1c, gi\u1ea3m thi\u1ec3u h\u01b0 h\u1ea1i b\u00ean ngo\u00e0i. C\u00e1c bi\u1ebfn th\u1ec3 bao g\u1ed3m lo\u1ea1i ren to\u00e0n ph\u1ea7n v\u00e0 ren m\u1ed9t ph\u1ea7n (ren n\u1eeda), trong \u0111\u00f3 ren m\u1ed9t ph\u1ea7n kh\u00f4ng ph\u1ea3i l\u00e0 ti\u00eau chu\u1ea9n nh\u01b0ng h\u1eefu \u00edch cho c\u00e1c \u1ee9ng d\u1ee5ng y\u00eau c\u1ea7u th\u00e2n tr\u01a1n \u0111\u1ec3 ch\u1ed1ng c\u1eaft.<\/p>\n

C\u00e1c t\u00f9y ch\u1ecdn \u0111\u1ea7u tua v\u00edt bao g\u1ed3m lo\u1ea1i c\u00f3 kh\u00eda \u0111\u1ec3 t\u0103ng c\u01b0\u1eddng kh\u1ea3 n\u0103ng si\u1ebft ch\u1eb7t b\u1eb1ng tay v\u00e0 lo\u1ea1i kh\u00f4ng kh\u00eda \u0111\u1ec3 c\u00f3 v\u1ebb ngo\u00e0i m\u01b0\u1ee3t m\u00e0 h\u01a1n. Ph\u1ea7n r\u00e3nh \u0111\u01b0\u1ee3c gia c\u00f4ng ch\u00ednh x\u00e1c theo dung sai DIN 912, \u0111\u1ea3m b\u1ea3o d\u1ee5ng c\u1ee5 v\u1eeba kh\u00edt m\u00e0 kh\u00f4ng b\u1ecb tr\u01b0\u1ee3t ren. H\u01b0\u1edbng d\u1eabn chuy\u00ean nghi\u1ec7p: Ch\u1ecdn lo\u1ea1i ren to\u00e0n ph\u1ea7n \u0111\u1ec3 c\u00f3 \u0111\u1ed9 b\u00e1m t\u1ed1i \u0111a trong c\u00e1c v\u1eadt li\u1ec7u m\u1ecfng, v\u00e0 lo\u1ea1i ren m\u1ed9t ph\u1ea7n cho c\u00e1c m\u1ed1i n\u1ed1i bu l\u00f4ng, n\u01a1i ph\u1ea7n kh\u00f4ng ren ch\u1ecbu t\u1ea3i tr\u1ecdng c\u1eaft. Lu\u00f4n ki\u1ec3m tra t\u00ednh t\u01b0\u01a1ng th\u00edch v\u1edbi c\u00e1c b\u1ed9 ph\u1eadn gh\u00e9p n\u1ed1i \u0111\u1ec3 tr\u00e1nh hi\u1ec7n t\u01b0\u1ee3ng k\u1eb9t d\u00ednh trong c\u00e1c \u1ee9ng d\u1ee5ng th\u00e9p kh\u00f4ng g\u1ec9.<\/p>\n

C\u00e1c lo\u1ea1i th\u00e9p carbon c\u00f3 \u0111\u1ed9 b\u1ec1n kh\u00e1c nhau: 4.8 cho s\u1eed d\u1ee5ng th\u00f4ng th\u01b0\u1eddng, 8.8 cho t\u1ea3i tr\u1ecdng trung b\u00ecnh v\u00e0 12.9 cho m\u00f4i tr\u01b0\u1eddng ch\u1ecbu t\u1ea3i cao, theo ti\u00eau chu\u1ea9n ISO 898-1. Phi\u00ean b\u1ea3n th\u00e9p kh\u00f4ng g\u1ec9 \u01b0u ti\u00ean \u0111\u1ed9 b\u1ec1n trong m\u00f4i tr\u01b0\u1eddng \u0103n m\u00f2n. Nh\u1eefng \u0111\u1eb7c \u0111i\u1ec3m n\u00e0y l\u00e0m cho ti\u00eau chu\u1ea9n DIN 912 tr\u1edf n\u00ean \u0111a d\u1ee5ng, nh\u01b0ng vi\u1ec7c l\u1ef1a ch\u1ecdn lo\u1ea1i ph\u00f9 h\u1ee3p l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 \u0111\u1ea1t hi\u1ec7u su\u1ea5t t\u1ed1i \u01b0u v\u00e0 tu\u1ed5i th\u1ecd cao.<\/p>\n<\/div>\n

Th\u00f4ng s\u1ed1 k\u00edch th\u01b0\u1edbc v\u00e0 dung sai<\/h2>\n
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Th\u00f4ng s\u1ed1 k\u00edch th\u01b0\u1edbc c\u1ee7a v\u00edt l\u1ee5c gi\u00e1c \u0111\u1ea7u ch\u00ecm DIN 912 \u0111\u01b0\u1ee3c m\u00f4 t\u1ea3 chi ti\u1ebft theo h\u1ec7 m\u00e9t t\u1eeb M3 \u0111\u1ebfn M30, \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 ch\u00ednh x\u00e1c trong thi\u1ebft k\u1ebf k\u1ef9 thu\u1eadt. C\u00e1c th\u00f4ng s\u1ed1 ch\u00ednh bao g\u1ed3m \u0111\u01b0\u1eddng k\u00ednh danh ngh\u0129a (C), b\u01b0\u1edbc ren (P), chi\u1ec1u d\u00e0i tham chi\u1ebfu (B), \u0111\u01b0\u1eddng k\u00ednh \u0111\u1ea7u v\u00edt (E), chi\u1ec1u cao \u0111\u1ea7u v\u00edt (A), chi\u1ec1u r\u1ed9ng l\u1ed7 ch\u00ecm (D) v\u00e0 b\u00e1n k\u00ednh chuy\u1ec3n ti\u1ebfp (F). B\u1ea3ng sau cung c\u1ea5p d\u1eef li\u1ec7u ch\u00ednh x\u00e1c t\u00ednh b\u1eb1ng milim\u00e9t, \u0111\u00e3 \u0111\u01b0\u1ee3c ki\u1ec3m ch\u1ee9ng theo ti\u00eau chu\u1ea9n DIN 912:<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u0110\u01b0\u1eddng k\u00ednh danh ngh\u0129a C<\/th>\nCao \u0111\u1ed9 P<\/th>\nB<\/th>\nE<\/th>\nM\u1ed8T<\/th>\nD<\/th>\nF ph\u00fat<\/th>\n<\/tr>\n
t\u1ed1i \u0111a<\/th>\nph\u00fat<\/th>\nt\u1ed1i \u0111a<\/th>\nph\u00fat<\/th>\nt\u1ed1i \u0111a<\/th>\nph\u00fat<\/th>\n<\/tr>\n<\/thead>\n
M3<\/td>\n0.5<\/td>\n18<\/td>\n5.68<\/td>\n5.32<\/td>\n3<\/td>\n2.86<\/td>\n2.58<\/td>\n2.52<\/td>\n1.3<\/td>\n<\/tr>\n
M4<\/td>\n0.7<\/td>\n20<\/td>\n7.22<\/td>\n6.78<\/td>\n4<\/td>\n3.82<\/td>\n3.08<\/td>\n3.02<\/td>\n2<\/td>\n<\/tr>\n
M5<\/td>\n0.8<\/td>\n22<\/td>\n8.72<\/td>\n8.28<\/td>\n5<\/td>\n4.82<\/td>\n4.095<\/td>\n4.02<\/td>\n2.5<\/td>\n<\/tr>\n
M6<\/td>\n1<\/td>\n24<\/td>\n10.22<\/td>\n9.78<\/td>\n6<\/td>\n5.7<\/td>\n5.14<\/td>\n5.02<\/td>\n3<\/td>\n<\/tr>\n
M8<\/td>\n1.25<\/td>\n28<\/td>\n13.27<\/td>\n12.73<\/td>\n8<\/td>\n7.64<\/td>\n6.14<\/td>\n6.02<\/td>\n4<\/td>\n<\/tr>\n
M10<\/td>\n1.5<\/td>\n32<\/td>\n16.27<\/td>\n15.73<\/td>\n10<\/td>\n9.64<\/td>\n8.175<\/td>\n8.025<\/td>\n5<\/td>\n<\/tr>\n
M12<\/td>\n1.75<\/td>\n36<\/td>\n18.27<\/td>\n17.73<\/td>\n12<\/td>\n11.57<\/td>\n10.175<\/td>\n10.025<\/td>\n6<\/td>\n<\/tr>\n
M14<\/td>\n2<\/td>\n40<\/td>\n21.33<\/td>\n20.67<\/td>\n14<\/td>\n13.57<\/td>\n12.212<\/td>\n12.032<\/td>\n7<\/td>\n<\/tr>\n
M16<\/td>\n2<\/td>\n44<\/td>\n24.33<\/td>\n23.67<\/td>\n16<\/td>\n15.57<\/td>\n14.217<\/td>\n14.032<\/td>\n8<\/td>\n<\/tr>\n
M20<\/td>\n2.5<\/td>\n52<\/td>\n30.33<\/td>\n29.67<\/td>\n20<\/td>\n19.48<\/td>\n17.23<\/td>\n17.05<\/td>\n10<\/td>\n<\/tr>\n
M24<\/td>\n3<\/td>\n60<\/td>\n36.3<\/td>\n35.61<\/td>\n24<\/td>\n23.48<\/td>\n19.275<\/td>\n19.065<\/td>\n12<\/td>\n<\/tr>\n
M30<\/td>\n3.5<\/td>\n72<\/td>\n45.3<\/td>\n44.61<\/td>\n30<\/td>\n29.48<\/td>\n22.275<\/td>\n22.065<\/td>\n15.5<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Dung sai l\u00e0 lo\u1ea1i 6g cho ren v\u00e0 h13 cho \u0111\u01b0\u1eddng k\u00ednh th\u00e2n, theo ti\u00eau chu\u1ea9n DIN 912. C\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt n\u00e0y cho ph\u00e9p m\u00f4 h\u00ecnh h\u00f3a CAD ch\u00ednh x\u00e1c v\u00e0 mua s\u1eafm. H\u01b0\u1edbng d\u1eabn: \u0110\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng y\u00eau c\u1ea7u \u0111\u1ed9 ch\u00ednh x\u00e1c cao, h\u00e3y \u0111o chi\u1ec1u cao \u0111\u1ea7u (A) \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o l\u1eafp \u0111\u1eb7t ph\u1eb3ng; sai l\u1ec7ch c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn c\u00e1c v\u1ea5n \u0111\u1ec1 l\u1eafp r\u00e1p. S\u1eed d\u1ee5ng th\u01b0\u1edbc \u0111o micromet \u0111\u1ec3 ki\u1ec3m tra v\u00e0 duy tr\u00ec tu\u00e2n th\u1ee7 dung sai.<\/p>\n<\/div>\n

Th\u00e0nh ph\u1ea7n v\u00e0 t\u00ednh ch\u1ea5t v\u1eadt li\u1ec7u<\/h2>\n
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\u1ed0c v\u00edt DIN 912 \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t t\u1eeb \u200b\u200bv\u1eadt li\u1ec7u ch\u1ea5t l\u01b0\u1ee3ng cao \u0111\u1ec3 \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u kh\u1eaft khe v\u1ec1 c\u01a1 kh\u00ed v\u00e0 m\u00f4i tr\u01b0\u1eddng. C\u00e1c t\u00f9y ch\u1ecdn th\u00e9p kh\u00f4ng g\u1ec9 bao g\u1ed3m SUS304 v\u00e0 SUS316, trong khi c\u00e1c lo\u1ea1i th\u00e9p carbon c\u00f3 \u0111\u1ed9 c\u1ee9ng t\u1eeb 4,8 \u0111\u1ebfn 12,9. Th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc c\u1ee7a c\u00e1c lo\u1ea1i th\u00e9p kh\u00f4ng g\u1ec9 nh\u01b0 sau, theo ASTM A276 v\u00e0 JIS G4303:<\/p>\n\n\n\n\n\n\n\n
V\u1eadt li\u1ec7u<\/th>\nTh\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc (%)<\/th>\n<\/tr>\n
C<\/th>\nMn<\/th>\nSi<\/th>\nP<\/th>\nS<\/th>\nNi<\/th>\nMo<\/th>\nCr<\/th>\n<\/tr>\n<\/thead>\n
Th\u00e9p kh\u00f4ng g\u1ec9 SUS304<\/td>\n\u22640,08<\/td>\n\u22642,00<\/td>\n\u22641,00<\/td>\n\u22640,045<\/td>\n\u22640,03<\/td>\n8.00-11.00<\/td>\n–<\/td>\n17.00-19.00<\/td>\n<\/tr>\n
Th\u00e9p kh\u00f4ng g\u1ec9 SUS316<\/td>\n\u22640,08<\/td>\n\u22642,00<\/td>\n\u22641,00<\/td>\n\u22640,045<\/td>\n\u22640,03<\/td>\n10.00-14.00<\/td>\n2.00-3.00<\/td>\n16.00-18.00<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Th\u00e9p kh\u00f4ng g\u1ec9 SUS304 c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n v\u00e0 h\u00e0n t\u1ed1t, ph\u00f9 h\u1ee3p v\u1edbi m\u00e1y m\u00f3c th\u00f4ng th\u01b0\u1eddng. Th\u00e9p kh\u00f4ng g\u1ec9 SUS316 c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng r\u1ed7 b\u1ec1 m\u1eb7t t\u1ed1t h\u01a1n nh\u1edd molypden, l\u00fd t\u01b0\u1edfng cho m\u00f4i tr\u01b0\u1eddng bi\u1ec3n ho\u1eb7c h\u00f3a ch\u1ea5t. M\u00e1c th\u00e9p cacbon: 4.8 (\u0111\u1ed9 b\u1ec1n k\u00e9o 400 MPa), 8.8 (800 MPa), 12.9 (1200 MPa) theo ti\u00eau chu\u1ea9n ISO 898-1. C\u00e1c \u0111\u1eb7c t\u00ednh bao g\u1ed3m \u0111\u1ed9 c\u1ee9ng (HV 120-250 \u0111\u1ed1i v\u1edbi th\u00e9p kh\u00f4ng g\u1ec9) v\u00e0 gi\u1edbi h\u1ea1n ch\u1ea3y. H\u01b0\u1edbng d\u1eabn: Ch\u1ecdn SUS316 cho m\u00f4i tr\u01b0\u1eddng ch\u1ee9a clorua; \u0111\u1ed1i v\u1edbi th\u00e9p cacbon, n\u00ean ph\u1ee7 c\u00e1c l\u1edbp b\u1ea3o v\u1ec7 nh\u01b0 k\u1ebdm \u0111\u1ec3 ch\u1ed1ng g\u1ec9, \u0111\u1ea3m b\u1ea3o tu\u00e2n th\u1ee7 ti\u00eau chu\u1ea9n ASTM F1941.<\/p>\n<\/div>\n

Quy tr\u00ecnh s\u1ea3n xu\u1ea5t v\u00e0 ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng<\/h2>\n
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Vi\u1ec7c s\u1ea3n xu\u1ea5t v\u00edt DIN 912 bao g\u1ed3m ph\u01b0\u01a1ng ph\u00e1p r\u00e8n ngu\u1ed9i, trong \u0111\u00f3 d\u00e2y th\u00e9p \u0111\u01b0\u1ee3c \u0111\u1ecbnh h\u00ecnh b\u1eb1ng \u0111\u1ea7u \u0111\u1ec3 t\u1ea1o th\u00e0nh n\u1eafp h\u00ecnh tr\u1ee5 v\u00e0 r\u00e3nh l\u1ee5c gi\u00e1c, sau \u0111\u00f3 l\u00e0 c\u00e1n ren \u0111\u1ec3 \u0111\u1ea1t \u0111\u1ed9 ch\u00ednh x\u00e1c v\u00e0 \u0111\u1ed9 b\u1ec1n. Qu\u00e1 tr\u00ecnh n\u00e0y gi\u00fap tinh ch\u1ec9nh c\u1ea5u tr\u00fac h\u1ea1t, t\u0103ng c\u01b0\u1eddng kh\u1ea3 n\u0103ng ch\u1ed1ng m\u1ecfi theo ti\u00eau chu\u1ea9n DIN 267-13. \u0110\u1ed1i v\u1edbi th\u00e9p kh\u00f4ng g\u1ec9, qu\u00e1 tr\u00ecnh l\u00e0m s\u1ea1ch sau khi t\u1ea1o h\u00ecnh gi\u00fap l\u00e0m s\u00e1ng b\u1ec1 m\u1eb7t, trong khi th\u00e9p carbon \u0111\u01b0\u1ee3c m\u1ea1 \u0111i\u1ec7n v\u1edbi c\u00e1c m\u00e0u nh\u01b0 oxit \u0111en ho\u1eb7c k\u1ebdm, theo ti\u00eau chu\u1ea9n ASTM B633.<\/p>\n

Ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng bao g\u1ed3m ki\u1ec3m tra 100% b\u1eb1ng th\u01b0\u1edbc \u0111o \u0111\u1ea1t\/kh\u00f4ng \u0111\u1ea1t cho ren, ki\u1ec3m tra k\u00edch th\u01b0\u1edbc b\u1eb1ng m\u00e1y so s\u00e1nh quang h\u1ecdc v\u00e0 ki\u1ec3m tra \u0111\u1ed9 c\u1ee9ng theo ti\u00eau chu\u1ea9n ISO 6508. C\u00e1c l\u00f4 h\u00e0ng \u0111\u01b0\u1ee3c ki\u1ec3m tra \u0111\u1ed9 b\u1ec1n k\u00e9o v\u00e0 \u0111\u1ed9 gi\u00e3n d\u00e0i. L\u1eddi khuy\u00ean chuy\u00ean nghi\u1ec7p: H\u00e3y y\u00eau c\u1ea7u nh\u00e0 cung c\u1ea5p c\u00f3 ch\u1ee9ng nh\u1eadn ISO 9001; th\u1ef1c hi\u1ec7n ki\u1ec3m tra \u0111\u1ea7u v\u00e0o \u0111\u1ec3 x\u00e1c minh v\u1eadt li\u1ec7u v\u00e0 k\u00edch th\u01b0\u1edbc, ng\u0103n ng\u1eeba l\u1ed7i l\u1eafp r\u00e1p trong c\u00e1c \u1ee9ng d\u1ee5ng quan tr\u1ecdng nh\u01b0 h\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5 ho\u1eb7c \u00f4 t\u00f4.<\/p>\n<\/div>\n

Ti\u00eau chu\u1ea9n v\u1ec1 hi\u1ec7u su\u1ea5t c\u01a1 h\u1ecdc v\u00e0 m\u00f4-men xo\u1eafn<\/h2>\n
\n

T\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc c\u1ee7a v\u00edt DIN 912 \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 theo c\u1ea5p \u0111\u1ed9 b\u1ec1n, v\u1edbi th\u00e9p kh\u00f4ng g\u1ec9 \u1edf c\u1ea5p A2-70 (\u0111\u1ed9 b\u1ec1n k\u00e9o 700 MPa) ho\u1eb7c A4-80 (800 MPa), v\u00e0 th\u00e9p carbon \u1edf c\u1ea5p 12.9 cho \u0111\u1ed9 b\u1ec1n 1220 MPa. C\u00e1c ch\u1ec9 s\u1ed1 hi\u1ec7u su\u1ea5t bao g\u1ed3m t\u1ea3i tr\u1ecdng gi\u1edbi h\u1ea1n v\u00e0 \u0111\u1ed9 b\u1ec1n c\u1eaft, \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 tin c\u1eady d\u01b0\u1edbi t\u1ea3i tr\u1ecdng \u0111\u1ed9ng.<\/p>\n

Ti\u00eau chu\u1ea9n m\u00f4-men xo\u1eafn quy \u0111\u1ecbnh gi\u00e1 tr\u1ecb t\u1ed1i \u0111a \u0111\u1ec3 tr\u00e1nh l\u00e0m h\u1ecfng ren: M3 \u1edf m\u1ee9c 1,5 Nm, M10 \u1edf m\u1ee9c 65 Nm \u0111\u1ed1i v\u1edbi th\u00e9p c\u1ea5p 12,9. Bi\u1ec3u \u0111\u1ed3 cung c\u1ea5p m\u00f4-men xo\u1eafn khi kh\u00f4 v\u00e0 khi c\u00f3 ch\u1ea5t b\u00f4i tr\u01a1n. H\u01b0\u1edbng d\u1eabn: S\u1eed d\u1ee5ng c\u1edd l\u00ea l\u1ef1c \u0111\u01b0\u1ee3c hi\u1ec7u chu\u1ea9n theo ti\u00eau chu\u1ea9n ISO 6789; \u0111\u1ed1i v\u1edbi th\u00e9p kh\u00f4ng g\u1ec9, h\u00e3y b\u00f4i ch\u1ea5t ch\u1ed1ng k\u1eb9t \u0111\u1ec3 gi\u1ea3m h\u1ec7 s\u1ed1 ma s\u00e1t t\u1eeb 0,2 xu\u1ed1ng 0,12, ng\u0103n ng\u1eeba hi\u1ec7n t\u01b0\u1ee3ng m\u00e0i m\u00f2n v\u00e0 \u0111\u1ea3m b\u1ea3o l\u1ef1c si\u1ebft tr\u01b0\u1edbc \u1ed5n \u0111\u1ecbnh.<\/p>\n

<\/div>\n<\/div>\n

H\u01b0\u1edbng d\u1eabn \u1ee9ng d\u1ee5ng v\u00e0 s\u1eed d\u1ee5ng<\/h2>\n
\n

\u1ed0c v\u00edt DIN 912 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong ng\u00e0nh c\u00f4ng nghi\u1ec7p \u00f4 t\u00f4, m\u00e1y m\u00f3c, x\u00e2y d\u1ef1ng v\u00e0 \u0111i\u1ec7n t\u1eed nh\u1edd \u0111\u1ed9 b\u1ec1n cao v\u00e0 thi\u1ebft k\u1ebf nh\u1ecf g\u1ecdn. Trong ng\u00e0nh \u00f4 t\u00f4, ch\u00fang d\u00f9ng \u0111\u1ec3 c\u1ed1 \u0111\u1ecbnh c\u00e1c b\u1ed9 ph\u1eadn \u0111\u1ed9ng c\u01a1; trong ng\u00e0nh x\u00e2y d\u1ef1ng, ch\u00fang d\u00f9ng \u0111\u1ec3 g\u1eafn k\u1ebft c\u00e1c khung k\u1ebft c\u1ea5u; trong ng\u00e0nh m\u00e1y m\u00f3c, ch\u00fang d\u00f9ng \u0111\u1ec3 l\u1eafp r\u00e1p c\u00e1c d\u1ee5ng c\u1ee5 ch\u00ednh x\u00e1c.<\/p>\n

H\u01b0\u1edbng d\u1eabn s\u1eed d\u1ee5ng:<\/p>\n

    \n
  • \u0110\u1ea3m b\u1ea3o \u0111\u1ed9 s\u00e2u l\u1ed7 cho ph\u00e9p ren \u0103n kh\u1edbp ho\u00e0n to\u00e0n.<\/li>\n
  • H\u00e3y s\u1eed d\u1ee5ng k\u00edch th\u01b0\u1edbc ch\u00eca kh\u00f3a l\u1ee5c gi\u00e1c ph\u00f9 h\u1ee3p \u0111\u1ec3 tr\u00e1nh b\u1ecb tr\u01b0\u1ee3t.<\/li>\n
  • \u0110\u1ec3 gi\u1ea3m rung \u0111\u1ed9ng, h\u00e3y th\u00eam v\u00f2ng \u0111\u1ec7m kh\u00f3a theo ti\u00eau chu\u1ea9n DIN 25201.<\/li>\n
  • T\u1ea1i c\u00e1c khu v\u1ef1c c\u00f3 t\u00ednh \u0103n m\u00f2n, h\u00e3y ch\u1ecdn SUS316 v\u00e0 ki\u1ec3m tra th\u01b0\u1eddng xuy\u00ean.<\/li>\n<\/ul>\n

    M\u1eb9o chuy\u00ean nghi\u1ec7p: T\u00ednh to\u00e1n m\u00f4-men xo\u1eafn c\u1ea7n thi\u1ebft b\u1eb1ng c\u00f4ng th\u1ee9c T = K * F * D, trong \u0111\u00f3 K l\u00e0 0,2, F l\u00e0 l\u1ef1c t\u1ea3i tr\u01b0\u1edbc, D l\u00e0 \u0111\u01b0\u1eddng k\u00ednh, \u0111\u1ec3 t\u1ed1i \u01b0u h\u00f3a \u0111\u1ed9 b\u1ec1n c\u1ee7a m\u1ed1i n\u1ed1i m\u00e0 kh\u00f4ng v\u01b0\u1ee3t qu\u00e1 gi\u1edbi h\u1ea1n v\u1eadt li\u1ec7u.<\/p>\n<\/div>\n

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

    \u1ed0c v\u00edt DIN 912 c\u00f3 ren to\u00e0n ph\u1ea7n v\u00e0 ren m\u1ed9t ph\u1ea7n kh\u00e1c nhau nh\u01b0 th\u1ebf n\u00e0o?<\/h3>\n

    Lo\u1ea1i ren to\u00e0n ph\u1ea7n cung c\u1ea5p \u0111\u1ed9 b\u00e1m t\u1ed1i \u0111a; lo\u1ea1i ren m\u1ed9t ph\u1ea7n (kh\u00f4ng ti\u00eau chu\u1ea9n) c\u00f3 th\u00e2n tr\u01a1n nh\u1eb5n \u0111\u1ec3 ch\u1ecbu l\u1ef1c c\u1eaft, l\u00fd t\u01b0\u1edfng cho c\u00e1c m\u1ed1i n\u1ed1i bu l\u00f4ng. Ch\u1ecdn lo\u1ea1i d\u1ef1a tr\u00ean lo\u1ea1i t\u1ea3i tr\u1ecdng.<\/p>\n

    So s\u00e1nh kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n c\u1ee7a v\u1eadt li\u1ec7u SUS304 v\u00e0 SUS316?<\/h3>\n

    Th\u00e9p kh\u00f4ng g\u1ec9 SUS304 ph\u00f9 h\u1ee3p cho m\u1ee5c \u0111\u00edch s\u1eed d\u1ee5ng th\u00f4ng th\u01b0\u1eddng; th\u00e9p kh\u00f4ng g\u1ec9 SUS316, v\u1edbi th\u00e0nh ph\u1ea7n molypden, c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n r\u1ed7 trong m\u00f4i tr\u01b0\u1eddng clorua. N\u00ean ch\u1ecdn SUS316 cho m\u00f4i tr\u01b0\u1eddng bi\u1ec3n ho\u1eb7c h\u00f3a ch\u1ea5t.<\/p>\n

    C\u1ea7n si\u1ebft ch\u1eb7t v\u00edt M8 DIN 912 lo\u1ea1i 12.9 v\u1edbi m\u00f4-men xo\u1eafn bao nhi\u00eau?<\/h3>\n

    Si\u1ebft ch\u1eb7t v\u1edbi l\u1ef1c 30-35 Nm khi kh\u00f4; gi\u1ea3m xu\u1ed1ng 20% khi c\u00f3 ch\u1ea5t b\u00f4i tr\u01a1n. S\u1eed d\u1ee5ng d\u1ee5ng c\u1ee5 \u0111\u00e3 \u0111\u01b0\u1ee3c hi\u1ec7u chu\u1ea9n \u0111\u1ec3 tr\u00e1nh si\u1ebft qu\u00e1 ch\u1eb7t v\u00e0 g\u00e2y h\u1ecfng h\u00f3c.<\/p>\n

    \u1ed0c v\u00edt ti\u00eau chu\u1ea9n DIN 912 c\u00f3 c\u1ea7n \u0111\u1ea7u v\u00edt kh\u00eda kh\u00f4ng?<\/h3>\n

    B\u1ec1 m\u1eb7t nh\u00e1m gi\u00fap c\u1ea3i thi\u1ec7n kh\u1ea3 n\u0103ng c\u1ea7m n\u1eafm; b\u1ec1 m\u1eb7t kh\u00f4ng nh\u00e1m mang t\u00ednh th\u1ea9m m\u1ef9. \u01afu ti\u00ean b\u1ec1 m\u1eb7t nh\u00e1m \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng trong c\u00e1c c\u00f4ng \u0111o\u1ea1n l\u1eafp r\u00e1p th\u1ee7 c\u00f4ng nh\u1eb1m gi\u1ea3m thi\u1ec3u hi\u1ec7n t\u01b0\u1ee3ng tr\u01b0\u1ee3t.<\/p>\n

    \u1ed0c v\u00edt DIN 912 c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng \u0111\u01b0\u1ee3c trong c\u00e1c \u1ee9ng d\u1ee5ng nhi\u1ec7t \u0111\u1ed9 cao kh\u00f4ng?<\/h3>\n

    C\u00f3, ch\u1ecbu \u0111\u01b0\u1ee3c nhi\u1ec7t \u0111\u1ed9 l\u00ean \u0111\u1ebfn 800\u00b0C \u0111\u1ed1i v\u1edbi SUS316, nh\u01b0ng \u0111\u1ed9 b\u1ec1n s\u1ebd gi\u1ea3m khi nhi\u1ec7t \u0111\u1ed9 tr\u00ean 400\u00b0C. Tham kh\u1ea3o ti\u00eau chu\u1ea9n ISO 3506 \u0111\u1ec3 bi\u1ebft c\u00e1c \u0111\u1eb7c t\u00ednh \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh theo nhi\u1ec7t \u0111\u1ed9.<\/p>\n<\/div>\n

    \n

     <\/p>\n<\/div>\n

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

    Introduction to DIN 912 Hex Socket Cap Screws DIN 912 specifies hex socket cap screws with cylindrical heads, widely used in mechanical engineering for their high strength and precise fastening capabilities. These screws feature a cylindrical head with an internal hexagon drive, enabling high torque application in confined spaces. The standard also partially aligns with […]<\/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-5852","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\/5852","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=5852"}],"version-history":[{"count":1,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/posts\/5852\/revisions"}],"predecessor-version":[{"id":5853,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/posts\/5852\/revisions\/5853"}],"wp:attachment":[{"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/media?parent=5852"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/categories?post=5852"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/tags?post=5852"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}