{"id":5705,"date":"2025-12-24T01:41:35","date_gmt":"2025-12-24T01:41:35","guid":{"rendered":"https:\/\/korea-transmission.com\/?p=5705"},"modified":"2025-12-24T01:41:35","modified_gmt":"2025-12-24T01:41:35","slug":"gb-t-3098-8-bolts-for-200c-to-700c-use","status":"publish","type":"post","link":"https:\/\/korea-transmission.com\/vi\/blog\/gb-t-3098-8-bolts-for-200c-to-700c-use\/","title":{"rendered":"Bu l\u00f4ng theo ti\u00eau chu\u1ea9n GB\/T 3098.8 d\u00f9ng cho nhi\u1ec7t \u0111\u1ed9 t\u1eeb -200\u00b0C \u0111\u1ebfn +700\u00b0C."},"content":{"rendered":"
\n

Gi\u1edbi thi\u1ec7u v\u1ec1 Ti\u00eau chu\u1ea9n GB\/T 3098.8<\/h2>\n

Ti\u00eau chu\u1ea9n n\u00e0y quy \u0111\u1ecbnh c\u00e1c \u0111\u1eb7c t\u00ednh c\u01a1 h\u1ecdc, v\u1eadt li\u1ec7u, ki\u1ec3m tra, nh\u1eadn d\u1ea1ng v\u00e0 \u0111\u00e1nh d\u1ea5u cho c\u00e1c b\u1ed9 ph\u1eadn k\u1ebft n\u1ed1i b\u1eb1ng bu l\u00f4ng ho\u1ea1t \u0111\u1ed9ng trong \u0111i\u1ec1u ki\u1ec7n nhi\u1ec7t \u0111\u1ed9 kh\u1eafc nghi\u1ec7t t\u1eeb -200\u00b0C \u0111\u1ebfn +700\u00b0C. N\u00f3 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 tin c\u1eady trong c\u00e1c \u1ee9ng d\u1ee5ng nh\u01b0 b\u00ecnh \u00e1p l\u1ef1c, n\u1ed3i h\u01a1i v\u00e0 m\u00e1y m\u00f3c ho\u1ea1t \u0111\u1ed9ng \u1edf nhi\u1ec7t \u0111\u1ed9 cao, b\u1ed5 sung cho c\u00e1c ti\u00eau chu\u1ea9n nh\u01b0 GB\/T 3098.1, GB\/T 3098.6 v\u00e0 DIN EN 10269.<\/p>\n<\/div>\n

\n

Ph\u1ea1m vi<\/h2>\n

Ti\u00eau chu\u1ea9n GB\/T 3098.8-2010 quy \u0111\u1ecbnh c\u00e1c y\u00eau c\u1ea7u \u0111\u1ed1i v\u1edbi \u1ed1c v\u00edt l\u00e0m b\u1eb1ng th\u00e9p austenit \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p \u0111\u1ebfn -200\u00b0C v\u00e0 th\u00e9p\/h\u1ee3p kim niken \u1edf nhi\u1ec7t \u0111\u1ed9 cao l\u00ean \u0111\u1ebfn +700\u00b0C. Ti\u00eau chu\u1ea9n n\u00e0y bao g\u1ed3m c\u00e1c c\u1ea5p \u0111\u1ed9 hi\u1ec7u su\u1ea5t c\u01a1 h\u1ecdc, ph\u01b0\u01a1ng ph\u00e1p th\u1eed nghi\u1ec7m v\u00e0 s\u1ef1 ph\u00f9 h\u1ee3p v\u1eadt li\u1ec7u \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o t\u00ednh to\u00e0n v\u1eb9n c\u1ea5u tr\u00fac d\u01b0\u1edbi t\u00e1c \u0111\u1ed9ng c\u1ee7a \u1ee9ng su\u1ea5t nhi\u1ec7t. \u0110i\u1ec1u n\u00e0y r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p y\u00eau c\u1ea7u kh\u1ea3 n\u0103ng ch\u1ed1ng bi\u1ebfn d\u1ea1ng d\u1ebbo, gi\u00e3n n\u1edf v\u00e0 g\u00e3y gi\u00f2n.<\/p>\n

    \n
  • \u00c1p d\u1ee5ng cho bu l\u00f4ng, \u1ed1c v\u00edt, \u0111inh t\u00e1n v\u00e0 \u0111ai \u1ed1c trong c\u00e1c m\u1ed1i n\u1ed1i b\u1eb1ng bu l\u00f4ng.<\/li>\n
  • T\u1eadp trung v\u00e0o kh\u1ea3 n\u0103ng ch\u1ecbu t\u1ea3i t\u1ed1i \u0111a \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o ho\u1ea1t \u0111\u1ed9ng an to\u00e0n trong m\u00f4i tr\u01b0\u1eddng kh\u1eafc nghi\u1ec7t.<\/li>\n
  • C\u00e1c t\u00e0i li\u1ec7u tham kh\u1ea3o li\u00ean quan \u0111\u1ebfn c\u00e1c ti\u00eau chu\u1ea9n \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o tu\u00e2n th\u1ee7 to\u00e0n di\u1ec7n.<\/li>\n<\/ul>\n<\/div>\n
    \n

    V\u1eadt li\u1ec7u v\u00e0 t\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc<\/h2>\n

    V\u1eadt li\u1ec7u \u0111\u01b0\u1ee3c l\u1ef1a ch\u1ecdn d\u1ef1a tr\u00ean ph\u1ea1m vi nhi\u1ec7t \u0111\u1ed9 \u0111\u1ec3 duy tr\u00ec t\u00ednh to\u00e0n v\u1eb9n c\u01a1 h\u1ecdc. \u1ede nhi\u1ec7t \u0111\u1ed9 th\u1ea5p, th\u00e9p austenit cung c\u1ea5p \u0111\u1ed9 d\u1ebbo; \u1edf nhi\u1ec7t \u0111\u1ed9 cao, th\u00e9p v\u00e0 h\u1ee3p kim niken cung c\u1ea5p \u0111\u1ed9 b\u1ec1n v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng bi\u1ebfn d\u1ea1ng d\u1ebbo. C\u00e1c \u0111\u1eb7c t\u00ednh ph\u1ea3i \u0111\u00e1p \u1ee9ng \u0111\u1ed9 c\u1ee9ng, \u0111\u1ed9 b\u1ec1n k\u00e9o v\u00e0 t\u1ea3i tr\u1ecdng th\u1eed nghi\u1ec7m \u0111\u00e3 \u0111\u01b0\u1ee3c quy \u0111\u1ecbnh.<\/p>\n

    V\u1eadt li\u1ec7u nhi\u1ec7t \u0111\u1ed9 th\u1ea5p<\/h3>\n

    B\u1ea3ng 1 li\u1ec7t k\u00ea c\u00e1c nh\u00f3m th\u00e9p austenit cho nhi\u1ec7t \u0111\u1ed9 l\u00e0m vi\u1ec7c t\u1ed1i thi\u1ec3u \u0111\u1ebfn -200\u00b0C, v\u1edbi c\u00e1c \u0111\u1eb7c t\u00ednh theo ti\u00eau chu\u1ea9n GB\/T 3098.6 v\u00e0 GB\/T 3098.15. H\u00e0m l\u01b0\u1ee3ng \u0111\u1ed3ng \u22641%. Nhi\u1ec7t \u0111\u1ed9 cao h\u01a1n kh\u00f4ng \u1ea3nh h\u01b0\u1edfng; nhi\u1ec7t \u0111\u1ed9 th\u1ea5p h\u01a1n y\u00eau c\u1ea7u ki\u1ec3m tra hi\u1ec7u n\u0103ng theo \u0111i\u1ec1u ki\u1ec7n.<\/p>\n

    \n\n\n\n\n\n\n\n\n\n\n\n
    Nhi\u1ec7t \u0111\u1ed9 l\u00e0m vi\u1ec7c li\u00ean t\u1ee5c t\u1ed1i thi\u1ec3u (x\u1ea5p x\u1ec9)<\/th>\nT\u1eadp \u0111o\u00e0n th\u00e9pM\u1ed9t<\/sup><\/th>\nC\u1ea5p \u0111\u1ed9 hi\u1ec7u n\u0103ng<\/th>\n<\/tr>\n
    Bu l\u00f4ng<\/th>\nH\u1ea1t<\/th>\n<\/tr>\n<\/thead>\n
    -60\u00b0Cb<\/sup><\/td>\nA2L<\/td>\n50<\/td>\n50<\/td>\n<\/tr>\n
    A2<\/td>\n<\/tr>\n
    A3<\/td>\n70<\/td>\n<\/tr>\n
    -200\u00b0Cc<\/sup><\/td>\nA4L<\/td>\n70<\/td>\n<\/tr>\n
    A4<\/td>\n80<\/td>\n<\/tr>\n
    A5<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

    M\u1ed9t<\/sup> H\u00e0m l\u01b0\u1ee3ng \u0111\u1ed3ng \u22641% (theo GB\/T 3098.6 v\u00e0 GB\/T 3098.15).
    \nb<\/sup> Bu l\u00f4ng c\u00f3 \u0111\u1ea7u.
    \nc<\/sup> \u0110inh t\u00e1n.<\/p>\n

    V\u1eadt li\u1ec7u ch\u1ecbu nhi\u1ec7t cao<\/h3>\n

    B\u1ea3ng 2 quy \u0111\u1ecbnh c\u00e1c lo\u1ea1i th\u00e9p v\u00e0 h\u1ee3p kim niken cho nhi\u1ec7t \u0111\u1ed9 l\u00ean \u0111\u1ebfn +700\u00b0C, v\u1edbi c\u00e1c \u0111\u1eb7c t\u00ednh theo B\u1ea3ng 4 c\u1ee7a ti\u00eau chu\u1ea9n DIN EN 10269 v\u1ec1 x\u1eed l\u00fd nhi\u1ec7t. D\u1eef li\u1ec7u tham kh\u1ea3o v\u1ec1 gi\u1edbi h\u1ea1n ch\u1ea3y, gi\u1edbi h\u1ea1n r\u00e3o v\u00e0 \u0111\u1ed9 gi\u00e3n n\u1edf t\u1eeb B\u1ea3ng 5, C.1, D.1 c\u1ee7a ti\u00eau chu\u1ea9n DIN EN 10269. Li\u00ean quan \u0111\u1ebfn c\u00e1c t\u1ea5m AD 2000-W2, W7, W10 v\u00e0 VdTUV.<\/p>\n

    \n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
    Ph\u1ea1m vi nhi\u1ec7t \u0111\u1ed9 l\u00e0m vi\u1ec7c theo DIN EN 10269<\/th>\nV\u1eadt li\u1ec7u<\/th>\n\u0110\u1ed9 c\u1ee9ng\/HV c\u1ee7a bu l\u00f4ng v\u00e0\/ho\u1eb7c \u0111ai \u1ed1c<\/th>\n<\/tr>\n
    ph\u00fat<\/th>\nNg\u1eafn h\u1ea1nM\u1ed9t<\/sup> t\u1ed1i \u0111a<\/th>\nD\u00e0i h\u1ea1nb<\/sup> t\u1ed1i \u0111a<\/th>\nVi\u1ebft t\u1eaft<\/th>\nCon s\u1ed1<\/th>\nC\u1ea5p<\/th>\nT\u00ecnh tr\u1ea1ng<\/th>\nph\u00fat<\/th>\nt\u1ed1i \u0111a<\/th>\n<\/tr>\n<\/thead>\n
    -120\u00b0C<\/td>\n\/<\/td>\n\/<\/td>\nKB<\/td>\n1.568<\/td>\nX12Ni5<\/td>\n+NT<\/td>\n157<\/td>\n203<\/td>\n<\/tr>\n
    +QT<\/td>\n173<\/td>\n235<\/td>\n<\/tr>\n
    \/<\/td>\n400\u00b0C<\/td>\n500\u00b0C<\/td>\nYd<\/td>\n1.1181<\/td>\nC35E<\/td>\n+N<\/td>\n150<\/td>\n200<\/td>\n<\/tr>\n
    \/<\/td>\n400\u00b0C<\/td>\n500\u00b0C<\/td>\nYK<\/td>\n1.1181<\/td>\nC35E<\/td>\n+QT<\/td>\n165<\/td>\n210<\/td>\n<\/tr>\n
    \/<\/td>\n400\u00b0C<\/td>\n\/<\/td>\nYB<\/td>\n1.5511<\/td>\n35B2g<\/sup><\/td>\n+QT<\/td>\n165<\/td>\n210<\/td>\n<\/tr>\n
    -60\u00b0C<\/td>\n500\u00b0C<\/td>\n550\u00b0C<\/td>\nKG<\/td>\n1.7218<\/td>\n25CrMo4<\/td>\n+QT<\/td>\n195<\/td>\n240<\/td>\n<\/tr>\n
    -100\u00b0C<\/td>\n500\u00b0C<\/td>\n\/<\/td>\nGC<\/td>\n1.7225<\/td>\n42CrMo4<\/td>\n+QT<\/td>\n275<\/td>\n337<\/td>\n<\/tr>\n
    \/<\/td>\n500\u00b0C<\/td>\n550\u00b0C<\/td>\nGA<\/td>\n1.7709<\/td>\n21CrMoV5-7<\/td>\n+QT<\/td>\n225<\/td>\n272<\/td>\n<\/tr>\n
    \/<\/td>\n600\u00b0C<\/td>\n550\u00b0C<\/td>\nGB<\/td>\n1.7711<\/td>\n40CrMoV46<\/td>\n+QT<\/td>\n272<\/td>\n320<\/td>\n<\/tr>\n
    \/<\/td>\n550\u00b0C<\/td>\n600\u00b0C<\/td>\nVe<\/td>\n1.4923<\/td>\nX22CrMoV12-1<\/td>\n+QT 1e<\/sup><\/td>\n256<\/td>\n303<\/td>\n<\/tr>\n
    \/<\/td>\n550\u00b0C<\/td>\n600\u00b0C<\/td>\nVHf<\/sup><\/td>\n1.4923<\/td>\nX22CrMoV12-1<\/td>\n+QT 2f<\/sup><\/td>\n287<\/td>\n367<\/td>\n<\/tr>\n
    \/<\/td>\n600\u00b0C<\/td>\n600\u00b0C<\/td>\nVW<\/td>\n1.4913<\/td>\nX19CrMoNbVN11-1<\/td>\n+QT<\/td>\n287<\/td>\n367<\/td>\n<\/tr>\n
    \/<\/td>\n650\u00b0C<\/td>\n670\u00b0C<\/td>\nS<\/td>\n1.4986<\/td>\nX7CrNiMoBNb16-16<\/td>\n+WW+P<\/td>\n210<\/td>\n272<\/td>\n<\/tr>\n
    -196\u00b0C<\/td>\n650\u00b0C<\/td>\n650\u00b0C<\/td>\nSD<\/td>\n1.498<\/td>\nX6NiCrTiMoVB25-15-2<\/td>\n+AT+P<\/td>\n287<\/td>\n367<\/td>\n<\/tr>\n
    -196\u00b0C<\/td>\n650\u00b0C<\/td>\n800\u00b0C<\/td>\nSB<\/td>\n2.4952<\/td>\nNiCr20TiAl<\/td>\n+AT+P<\/td>\n320<\/td>\n417<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

    M\u1ed9t<\/sup> Gi\u1edbi h\u1ea1n nhi\u1ec7t \u0111\u1ed9 \u0111\u1ed1i v\u1edbi gi\u1edbi h\u1ea1n ch\u1ea3y v\u00e0 \u0111\u1ed9 b\u1ec1n k\u00e9o.
    \nb<\/sup> Gi\u1edbi h\u1ea1n nhi\u1ec7t \u0111\u1ed9 \u0111\u1ed1i v\u1edbi hi\u1ec7n t\u01b0\u1ee3ng r\u00e3o v\u00e0 \u0111\u1ed9 b\u1ec1n \u0111\u1ee9t.
    \nc<\/sup> \u0110i\u1ec1u ki\u1ec7n theo b\u1ea3ng 4 c\u1ee7a ti\u00eau chu\u1ea9n DIN EN 10269: +N (chu\u1ea9n h\u00f3a), +NT (chu\u1ea9n h\u00f3a v\u00e0 ram), +QT (t\u00f4i v\u00e0 ram), +WW (gia c\u00f4ng n\u00f3ng), +AT (\u1ee7 dung d\u1ecbch), +P (l\u00e0m c\u1ee9ng b\u1eb1ng k\u1ebft t\u1ee7a).
    \nd<\/sup> Ch\u1ec9 d\u00f9ng cho c\u00e1c lo\u1ea1i h\u1ea1t.
    \ne<\/sup> V theo DIN EN 10269, Rp0,2 \u2265600 N\/mm2 (+QT1).
    \nf<\/sup> VH theo DIN EN 10269, Rp0,2 \u2265600 N\/mm2 (+QT2).
    \ng<\/sup> Xem VdTUV WB 490.<\/p>\n<\/div>\n

    \n

    Kh\u1ea3 n\u0103ng ch\u1ecbu t\u1ea3i<\/h2>\n

    C\u00e1c gi\u00e1 tr\u1ecb t\u1ea3i tr\u1ecdng \u0111\u1ea3m b\u1ea3o c\u00e1c chi ti\u1ebft l\u1eafp gh\u00e9p ch\u1ecbu \u0111\u01b0\u1ee3c \u1ee9ng su\u1ea5t trong qu\u00e1 tr\u00ecnh v\u1eadn h\u00e0nh. S\u1eed d\u1ee5ng \u0111\u1ec3 ki\u1ec3m ch\u1ee9ng thi\u1ebft k\u1ebf.<\/p>\n

    T\u1ea3i tr\u1ecdng k\u00e9o t\u1ed1i thi\u1ec3u \u0111\u1ed1i v\u1edbi bu l\u00f4ng ren th\u00f4<\/h3>\n

    B\u1ea3ng 4a: As,nom<\/sub> \u00d7 Rm, ph\u00fat<\/sub> \/kN<\/p>\n

    \n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
    K\u00edch th\u01b0\u1edbc ren d<\/th>\nV\u00f9ng ch\u1ecbu \u00e1p l\u1ef1c As,nom<\/sub> \/mm\u00b2<\/th>\nTh\u00e9p kh\u00f4ng g\u1ec9 Austenit c\u1ea5p<\/th>\nTh\u00e9p v\u00e0 h\u1ee3p kim niken<\/th>\n<\/tr>\n
    50<\/th>\n70<\/th>\nKB<\/th>\nYK<\/th>\nKG<\/th>\nGA<\/th>\nGB<\/th>\nGC<\/th>\nV<\/th>\nVH<\/th>\nS<\/th>\nSD<\/th>\nSB<\/th>\n<\/tr>\n
    YB<\/th>\nVW<\/th>\n<\/tr>\n<\/thead>\n
    M3<\/td>\n5.03<\/td>\n2.52<\/td>\n3.52<\/td>\n2.67<\/td>\n2.52<\/td>\n3.02<\/td>\n3.52<\/td>\n4.28<\/td>\n4.33<\/td>\n4.02<\/td>\n4.53<\/td>\n3.27<\/td>\n4.53<\/td>\n5.03<\/td>\n<\/tr>\n
    M3.5<\/td>\n6.78<\/td>\n3.39<\/td>\n4.75<\/td>\n3.59<\/td>\n3.39<\/td>\n4.07<\/td>\n4.75<\/td>\n5.76<\/td>\n5.83<\/td>\n5.42<\/td>\n6.1<\/td>\n4.41<\/td>\n6.1<\/td>\n6.78<\/td>\n<\/tr>\n
    M4<\/td>\n8.78<\/td>\n4.39<\/td>\n6.15<\/td>\n4.65<\/td>\n4.39<\/td>\n5.27<\/td>\n6.15<\/td>\n7.46<\/td>\n7.55<\/td>\n7.02<\/td>\n7.9<\/td>\n5.71<\/td>\n7.9<\/td>\n8.78<\/td>\n<\/tr>\n
    M5<\/td>\n14.2<\/td>\n7.1<\/td>\n9.94<\/td>\n7.53<\/td>\n7.1<\/td>\n8.52<\/td>\n9.94<\/td>\n12.1<\/td>\n12.2<\/td>\n11.4<\/td>\n12.8<\/td>\n9.23<\/td>\n12.8<\/td>\n14.2<\/td>\n<\/tr>\n
    M6<\/td>\n20.1<\/td>\n10.1<\/td>\n14.1<\/td>\n10.7<\/td>\n10.1<\/td>\n12.1<\/td>\n14.1<\/td>\n17.1<\/td>\n17.3<\/td>\n16.1<\/td>\n18.1<\/td>\n13.1<\/td>\n18.1<\/td>\n20.1<\/td>\n<\/tr>\n
    M7<\/td>\n28.9<\/td>\n14.5<\/td>\n20.2<\/td>\n15.3<\/td>\n14.5<\/td>\n17.3<\/td>\n20.2<\/td>\n24.6<\/td>\n24.9<\/td>\n23.1<\/td>\n26<\/td>\n18.8<\/td>\n26<\/td>\n28.9<\/td>\n<\/tr>\n
    M8<\/td>\n36.6<\/td>\n18.3<\/td>\n25.6<\/td>\n19.4<\/td>\n18.3<\/td>\n22<\/td>\n25.6<\/td>\n31.1<\/td>\n31.5<\/td>\n29.3<\/td>\n32.9<\/td>\n23.8<\/td>\n32.9<\/td>\n36.6<\/td>\n<\/tr>\n
    M10<\/td>\n58<\/td>\n29<\/td>\n40.6<\/td>\n30.7<\/td>\n29<\/td>\n34.8<\/td>\n40.6<\/td>\n49.3<\/td>\n49.9<\/td>\n46.4<\/td>\n52.2<\/td>\n37.7<\/td>\n52.2<\/td>\n58<\/td>\n<\/tr>\n
    M12<\/td>\n84.3<\/td>\n42.2<\/td>\n59<\/td>\n44.7<\/td>\n42.2<\/td>\n50.6<\/td>\n59<\/td>\n71.7<\/td>\n72.5<\/td>\n67.4<\/td>\n75.9<\/td>\n54.8<\/td>\n75.9<\/td>\n84.3<\/td>\n<\/tr>\n
    M14<\/td>\n115<\/td>\n57.5<\/td>\n80.5<\/td>\n61<\/td>\n57.5<\/td>\n69<\/td>\n80.5<\/td>\n97.8<\/td>\n98.9<\/td>\n92<\/td>\n104<\/td>\n74.8<\/td>\n104<\/td>\n115<\/td>\n<\/tr>\n
    M16<\/td>\n157<\/td>\n78.5<\/td>\n110<\/td>\n83.2<\/td>\n78.5<\/td>\n94.2<\/td>\n110<\/td>\n133<\/td>\n135<\/td>\n126<\/td>\n141<\/td>\n102<\/td>\n141<\/td>\n157<\/td>\n<\/tr>\n
    M18<\/td>\n192<\/td>\n96<\/td>\n134<\/td>\n102<\/td>\n96<\/td>\n115<\/td>\n134<\/td>\n163<\/td>\n165<\/td>\n154<\/td>\n173<\/td>\n125<\/td>\n173<\/td>\n192<\/td>\n<\/tr>\n
    M20<\/td>\n245<\/td>\n123<\/td>\n172<\/td>\n130<\/td>\n123<\/td>\n147<\/td>\n172<\/td>\n208<\/td>\n211<\/td>\n196<\/td>\n221<\/td>\n159<\/td>\n221<\/td>\n245<\/td>\n<\/tr>\n
    M22<\/td>\n303<\/td>\n152<\/td>\n212<\/td>\n161<\/td>\n152<\/td>\n182<\/td>\n212<\/td>\n258<\/td>\n261<\/td>\n242<\/td>\n273<\/td>\n197<\/td>\n273<\/td>\n303<\/td>\n<\/tr>\n
    M24<\/td>\n353<\/td>\n177<\/td>\n247<\/td>\n187<\/td>\n177<\/td>\n212<\/td>\n247<\/td>\n300<\/td>\n304<\/td>\n282<\/td>\n318<\/td>\n229<\/td>\n318<\/td>\n353<\/td>\n<\/tr>\n
    M27<\/td>\n459<\/td>\n230<\/td>\n\/<\/td>\n243<\/td>\n230<\/td>\n275<\/td>\n321<\/td>\n390<\/td>\n395<\/td>\n367<\/td>\n413<\/td>\n298<\/td>\n413<\/td>\n459<\/td>\n<\/tr>\n
    M30<\/td>\n561<\/td>\n281<\/td>\n\/<\/td>\n297<\/td>\n281<\/td>\n337<\/td>\n393<\/td>\n477<\/td>\n482<\/td>\n449<\/td>\n505<\/td>\n365<\/td>\n505<\/td>\n561<\/td>\n<\/tr>\n
    M33<\/td>\n694<\/td>\n347<\/td>\n\/<\/td>\n368<\/td>\n347<\/td>\n416<\/td>\n486<\/td>\n590<\/td>\n597<\/td>\n555<\/td>\n625<\/td>\n451<\/td>\n625<\/td>\n694<\/td>\n<\/tr>\n
    M36<\/td>\n817<\/td>\n409<\/td>\n\/<\/td>\n433<\/td>\n409<\/td>\n490<\/td>\n572<\/td>\n694<\/td>\n703<\/td>\n654<\/td>\n735<\/td>\n531<\/td>\n735<\/td>\n817<\/td>\n<\/tr>\n
    M39<\/td>\n976<\/td>\n488<\/td>\n\/<\/td>\n517<\/td>\n488<\/td>\n586<\/td>\n683<\/td>\n830<\/td>\n839<\/td>\n781<\/td>\n878<\/td>\n634<\/td>\n878<\/td>\n976<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
    \n

    Kh\u1ea3 n\u0103ng ch\u1ecbu t\u1ea3i c\u1ee7a c\u00e1c m\u1ed1i n\u1ed1i bu l\u00f4ng<\/h2>\n

    \u0110\u1ec3 \u0111\u1ea3m b\u1ea3o kh\u1ea3 n\u0103ng ch\u1ecbu t\u1ea3i t\u1ed1i \u0111a: S\u1eed d\u1ee5ng bu l\u00f4ng v\u00e0 \u0111ai \u1ed1c c\u00f3 kh\u1ea3 n\u0103ng ch\u1ecbu t\u1ea3i t\u1ed1i \u0111a ph\u00f9 h\u1ee3p v\u1edbi chi\u1ec1u cao ren (Lo\u1ea1i 1 cho ren th\u00f4, Lo\u1ea1i 2 cho ren m\u1ecbn), dung sai ren v\u00e0 t\u1ef7 l\u1ec7 c\u01b0\u1eddng \u0111\u1ed9 th\u00edch h\u1ee3p. S\u1ef1 g\u00e3y v\u1ee1 trong c\u00e1c th\u1eed nghi\u1ec7m k\u00e9o ph\u1ea3i x\u1ea3y ra \u1edf c\u00e1c ph\u1ea7n kh\u00f4ng c\u00f3 ren theo ti\u00eau chu\u1ea9n GB\/T 3098.1 ho\u1eb7c 3098.6. \u0110inh t\u00e1n c\u00f3 ph\u1ea7n eo th\u1eaft theo ti\u00eau chu\u1ea9n GB\/T 13807.2\/3 v\u1edbi dung sai theo ti\u00eau chu\u1ea9n GB\/T 3103.4.<\/p>\n

      \n
    1. Ti\u1ebfn h\u00e0nh th\u1eed nghi\u1ec7m \u0111\u1ed9 b\u1ec1n k\u00e9o \u0111\u1ec3 x\u00e1c minh t\u1ea3i tr\u1ecdng t\u1ed1i thi\u1ec3u.<\/li>\n
    2. \u0110\u1ea3m b\u1ea3o chi\u1ec1u cao \u0111ai \u1ed1c \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u v\u1ec1 ph\u00e2n b\u1ed1 t\u1ea3i tr\u1ecdng.<\/li>\n
    3. Ch\u1ecdn v\u1eadt li\u1ec7u ph\u00f9 h\u1ee3p \u0111\u1ec3 tr\u00e1nh c\u00e1c m\u1eaft x\u00edch y\u1ebfu trong qu\u00e1 tr\u00ecnh l\u1eafp r\u00e1p.<\/li>\n<\/ol>\n<\/div>\n
      \n

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

      Nh\u1eefng v\u1eadt li\u1ec7u n\u00e0o ph\u00f9 h\u1ee3p cho c\u00e1c \u1ee9ng d\u1ee5ng \u1edf nhi\u1ec7t \u0111\u1ed9 -200\u00b0C?<\/h3>\n

      Th\u00e9p Austenit nh\u01b0 A4L, A4, A5 v\u1edbi m\u00e1c th\u00e9p 70 ho\u1eb7c 80, \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 d\u1ebbo v\u00e0 \u0111\u1ed9 b\u1ec1n theo B\u1ea3ng 1.<\/p>\n

      L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 ch\u1ecdn bu l\u00f4ng v\u00e0 \u0111ai \u1ed1c ph\u00f9 h\u1ee3p cho nhi\u1ec7t \u0111\u1ed9 cao?<\/h3>\n

      S\u1eed d\u1ee5ng B\u1ea3ng 3 \u0111\u1ec3 gh\u00e9p n\u1ed1i h\u1ee3p l\u00fd, \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 b\u1ec1n c\u1ee7a \u0111ai \u1ed1c >70% c\u1ee7a bu l\u00f4ng v\u00e0 dung sai ren ph\u00f9 h\u1ee3p \u0111\u1ec3 \u0111\u1ea1t c\u00f4ng su\u1ea5t t\u1ed1i \u0111a.<\/p>\n

      \u0110i\u1ec1u g\u00ec s\u1ebd x\u1ea3y ra n\u1ebfu nhi\u1ec7t \u0111\u1ed9 ho\u1ea1t \u0111\u1ed9ng v\u01b0\u1ee3t qu\u00e1 +700\u00b0C?<\/h3>\n

      Ti\u00eau chu\u1ea9n gi\u1edbi h\u1ea1n nhi\u1ec7t \u0111\u1ed9 \u0111\u1ebfn +700\u00b0C; \u0111\u1ed1i v\u1edbi nhi\u1ec7t \u0111\u1ed9 cao h\u01a1n, c\u1ea7n ti\u1ebfn h\u00e0nh c\u00e1c th\u1eed nghi\u1ec7m r\u00e3o v\u00e0 gi\u00e3n n\u1edf c\u1ee5 th\u1ec3 theo h\u01b0\u1edbng d\u1eabn c\u1ee7a ti\u00eau chu\u1ea9n DIN EN 10269.<\/p>\n

      T\u1ea1i sao \u0111ai \u1ed1c th\u00e9p Austenit l\u1ea1i c\u00f3 \u0111\u1ed9 b\u1ec1n k\u00e9o cao h\u01a1n?<\/h3>\n

      \u0110\u1ec3 b\u00f9 \u0111\u1eafp cho s\u1ef1 kh\u00e1c bi\u1ec7t trong qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t theo t\u1eebng l\u00f4 nh\u1ecf, \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 tin c\u1eady khi s\u1eed d\u1ee5ng v\u1edbi c\u00e1c bu l\u00f4ng m\u1ec1m h\u01a1n (xem ch\u00fa th\u00edch b trong B\u1ea3ng 3).<\/p>\n

      L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 ki\u1ec3m tra kh\u1ea3 n\u0103ng ch\u1ecbu t\u1ea3i t\u1ed1i \u0111a?<\/h3>\n

      Ti\u1ebfn h\u00e0nh th\u1eed nghi\u1ec7m k\u00e9o theo ti\u00eau chu\u1ea9n GB\/T 3098.1 ho\u1eb7c 3098.6, x\u00e1c minh v\u1ecb tr\u00ed g\u00e3y v\u00e0 t\u1ea3i tr\u1ecdng t\u1ed1i thi\u1ec3u t\u1eeb B\u1ea3ng 4a\/5a.<\/p>\n

      C\u00f3 nh\u1eefng h\u1ea1n ch\u1ebf n\u00e0o v\u1ec1 h\u00e0m l\u01b0\u1ee3ng \u0111\u1ed3ng kh\u00f4ng?<\/h3>\n

      \u0110\u00fang v\u1eady, \u22641% \u0111\u1ed1i v\u1edbi th\u00e9p austenit \u0111\u1ec3 ng\u0103n ng\u1eeba hi\u1ec7n t\u01b0\u1ee3ng gi\u00f2n trong \u0111i\u1ec1u ki\u1ec7n ho\u1ea1t \u0111\u1ed9ng \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p.<\/p>\n<\/div>\n

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

      Introduction to GB\/T 3098.8 Standard This standard outlines mechanical properties, materials, inspection, identification, and marking for bolted connection parts operating in extreme temperatures from -200\u00b0C to +700\u00b0C. It ensures reliability in applications such as pressure vessels, boilers, and high-temperature machinery, supplementing standards like GB\/T 3098.1, GB\/T 3098.6, and DIN EN 10269. Scope GB\/T 3098.8-2010 specifies […]<\/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-5705","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\/5705","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=5705"}],"version-history":[{"count":2,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/posts\/5705\/revisions"}],"predecessor-version":[{"id":5707,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/posts\/5705\/revisions\/5707"}],"wp:attachment":[{"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/media?parent=5705"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/categories?post=5705"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/tags?post=5705"}],"curies":[{"name":"trang web","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}