合金结构钢由于具有合适的淬透性,经适宜的金属热处理后,显微组织为均匀的索氏体、贝氏体或极细的珠光体,因而具有较高的抗拉强度和屈强比(一般在0.85左右),较高的韧性和疲劳强度,和较低的韧性-脆性转变温度,可用于制造截面尺寸较大的机器零件。 合金结构钢一般分为调质结构钢和表面硬化结构钢。 ①调质结构钢 这类钢的含碳量一般约为0.25%~0.55%,对于既定截面尺寸的结构件,在调质处理(淬火加回火)时,如果沿截面淬透,则力学性能良好,如果淬不透,显微组织中出现有自由铁素体,则韧性下降。对具有回火脆性倾向的钢如锰钢、铬钢、镍铬钢等,回火后应快冷。这类钢的淬火临界直径,随晶粒度和合金元素含量的增加而增大,例如,40Cr和35SiMn钢约为30~40mm,而40CrNiMo和30CrNi2MoV钢则约为 60~100mm,常用于制造承受较大载荷的轴、连杆等结构件。 ②表面硬化结构钢 用以制造表层坚硬耐磨而心部柔韧的零部件,如齿轮、轴等。为使零件心部韧性高,钢中含碳量应低,一般在0.12~0.25%,同时还有适量的合金元素,以保证适宜的淬透性。氮化钢还需加入易形成氮化物的合金元素(如Al、Cr、Mo等)。渗碳或碳氮共渗钢,经850~950℃渗碳或碳氮共渗后,淬火并在低温回火(约200℃)状态下使用。氮化钢经氮化处理(480~580℃),直接使用,不再经淬火与回火处理。 冶炼工艺稳定,淬透性好,碳氮共渗工艺性能良好,热处理后的变形量小,无回火脆性,加工制造性能和焊接性能均良好。要求具有较高的屈服强度、抗拉强度和疲劳强度,还有足够的塑性和韧性。良好的加工性,加工变形微小,耐磨性良好,抗疲劳性能相当好。 用于轴类、活塞类零配件、汽车、飞机各种特殊耐磨零配件等。合金结构钢:20MN2 30MN2 35MN2 40MN2 50MN2 20MNV 27SIMN 35SIMN 42SIMN 20SIMN2MOV 25SIMN2MOV 37SIMN2MOV 40B 45B 50B 40MNB 45MNB 20MNMOB 15MNVB 20MNVB 40MNVB 20MNTIB 25MNTIBRE 15CR 15CRA 20CR 30CR 35CR 40CR 45CR 50CR 38CRSI 12CRMO 15CRMO 20CRMO 30CRMO 30CRMOA 35CRMO 35CRMO 42CRMO 12CRMOV 35CRMOV 12CR1MOV 25CR2MOVA 25CR2MO1VA 38CRMOAL 40CRV 50CRVA 15CRMN 20CRMN 40CRMN 20CRMNSI 25CRMNSI 30CRMNSI 30CRMNSIA 35CRMNSIA 20CRMNMO 40CRMNMO 20CRMNTI 30CRMNTI 20CRNI 40CRNI 45CRNI 50CRNI 12CRNI2 12CRNI3 20CRNI3 30CRNI3 37CRNI3 12CR2NI4 20CRNIMO 40CRNIMOA 18CRNIMNMOA 45CRNIMOVA 18CR2NI4WA 25CR2NI4WA 45H 45AH 15CrH 15CrAH 20CrH 20CrAH 20CrLH 20CrLAH 40CrH U59455 U59457 A20155 A20157 A20205 A20207 A20215 A20217 A20405 40CrAH 45CrH 45CrAH 15CrMoH 15CrMoAH 20CrMoH 20CrMoAH 22CrMoH 22CrMoAH 42CrMoH 42CrMoAH 16CrMnH 16CrMnAH 20CrMnH 20CrMnAH 15CrMnBH 15CrMnBAH 17CrMnBH 17CrMnBAH 40MnBAH 40MnBH 45MnBH 45MnBAH 20MnVBH 20MnVBAH 20MnTiBH 20MnTiBAH 20CrMnMoH 20CrMnMoAH 20CrMnTiH 20CrMnTiAH 20CrNi3H 20CrNi3AH 12Cr2Ni4H 12Cr2Ni4AH 20CrNiMoH A20407 A20455 A20457 A30155 A30157 A30205 A30207 A30225 A30227 A30425 A30427 A22165 A22167 A22205 A22207 A25155 A25157 A25175 A25177 A71407 A71405 A71455 A71457 A73205 A73207 A74205 A74207 A34205 A34207 A26205 A26207 A42205 A42207 A43125 A43127 A50205 20CrNiMoAH 20CrNi2MoH 20CrNi2MoAH A50207 A50215 A50217 55Ti 60Ti 70Ti 法C10E C10R C15E C15R XC10 XC18 C16E C16R 17Cr3 17CrS3 28Cr4 28CrS4 16MnCr5 16MnCrS5 16MnCrB5 20MnCr5 20MnCrS5 10NiCr5-4 15NiCr13 16NiCr4 16NiCrS4 18NiCr5-4 16MC5 20MC5 16NCD13 20MoCr3 20MoCrS3 20MoCr4 20MoCrS4 17CrNi6-6 18CrMo4 18CrMoS4 22CrMoS3-5 18CrNiMo7-6 14NiCrMo13-4 17NiCrMo6-4 17NiCrMoS6-4 20NiCrMo2-2 20NiCrMoS2-2 6 18CD4 D6 20NCD2 20NiCrMoS6-4 24CrMo13-6 31CrMo12 31CrMoV9 33CrMoV12-9 32CrAlMo7-10 34CrAlMo5-10 41CrAlMo7-10 34CrAlNi7 C22E C22R C35 C35E C35R C40 C40E C40R C45 C45E C45R C50E C50R C55 C55E C55R C60 C60E C60R 28Mn6 XC18 XC18U XC38H1 XC38H1U XC4H1 XC4H1U XC48H1 XC48H1U XC55H1 XC55H1U 34Cr4 34CrS4 37Cr4 37CrS4 38Cr2 32C4 32C4U 38C4 38C4U 38C241Cr4 41CrS4 46Cr2 25CrMo4 25CrMoS4 34CrMo4 34CrMoS4 42CrMo4 42CrMoS4 50CrMo4 20MnB5 30MnB5 38MnB5 27MnCrB5-2 33MnCrB5-2 39MnCrB6-2 30CrNiMo8 30CrNiMo16-6 42C4 42C4U 25CD4 25CD4U 34CD4 34CD3U 42CD4 42CD4U 20MB5 38MB5 D8 34CrNiMo6 35NiCr5 36NiCrMo16 39NiCrMo3 51CrV4 35NCD16 51V4 8N8 10CD6 10CD8.10 D6 10F2 10N3 10N8 10N12 10NC12 10NCD4 10NCD5 10NCD12 10ND4 10ND8 10Pb2 10PbF2 12C3 12CD4 12CD10 12M5 12MF12NC2 12NC15 12ND16 14NC12 14NCD6 15CD2 15CD3.5 15NCD2 15ND8 15ND14 16N6 16NC11 16NC12 16NCD4 16NCD5 16NCD17 18C2 18C3 18C4 D6 18N3 18NC12 18NC13 20CD4 20CD8 20CD12 20CDV6 20F2 20N8 20N12 20NC2 20NC11 20ND8 20ND16 20Pb2 22N8 25NC6 25NC11 25NCD4 25NCD5 25NCD15 25NCD16 28C4 28CDV5 30CAD6.12 30N8 30NC6 30NC12 30NC16 30NCD2 30NCD2 30NCD8 30NCD11 30NCD12 30NCD15 30NCD16 32CDV12 D8 D11 32M5 32NC2 35C2 35MF4 35N3 35NC6 35NC11 35NCD2 35NCD4 35NCD5 35NCD14 35Pb2 38CMND8 38MS5 40CD4 40M5 40N3 40NC17 40NCD2 40NCD2TS 40NCD18 40NCD19 41S7 45C2 45C6 45CDV4 45M5 45NC2 45S8 50C4 50S7 55C2 55M5 60S7 70N8 100CDV4 105WC20 XC6 XC15 XC35 XC38TS XC48TS XC65 XC70 XC80 XC85 XC130 Z2NKD18.8 Z12N5 Z18N5 Z35NMC12.05 Z120M12 德C10 C10Pb C10GPb C15 C15Pb C15GPb C10E 1.0301 1.0302 1.0401 1.0403 1.1121 C15E C16E 10NiCr5-4 14NiCr10 14NiCr14 15NiCr3 14NiCr18 16NiCr4 16NiCrS4 18NiCr5-4 17CrNi6-6 15CrNi6 18CrNi8 20NiCrMo2-2 21NiCrMo2 17NiCrMo6-4 17NiCrMoS6-4 20NiCrMoS6-4 18CrNiMo7-6 17CrNiMo6 17CrNiMo6 14NiCrMo13-4 13Cr2 15Cr3 17Cr3 17CrS3 20Cr4 20CrS4 28Cr4 28CrS4 16MnCr5 16MnCrS5 20MnCr5 20MnCrS5 16MnCrB5 18CrMo4 18CrMoS4 15CrMo5 20CrMo5 23CrMoB3-3 20CrMoS2 20CrMo2 20MoCr3 20MoCrS3 20MoCr4 20MoCrS4 25MoCr4 25MoCrS4 22CrMoS3-5 1.1141 1.1148 1.5805 1.5732 1.5752 1.5860 0.5714 1.5715 1.5810 1.5918 1.5919 1.5920 1.6523 1.6526 1.6566 1.6569 1.6571 1.6587 1.6657 1.7012 1.7015 1.7016 1.7014 1.7027 1.7028 1.7030 1.7036 1.7131 1.7139 17147 1.7149 1.7160 1.7243 1.7244 1.7262 1.7264 1.7271 1.7311 1.7320 1.7319 1.7321 1.7323 1.7325 1.7326 1.7333 34CrAl6 34CrAlS5 32CrAlMo7-10 34CrAlMo5-10 41CrAlMo7-10 41CrAlmo7-10 31CrMo12 24CrMo13-6 31CrMoV9 15CrMoV5-9 33CrMoV12-9 1.8504 1.8506 1.8505 1.8507 1.8509 1.8515 1.8516 1.8519 1.8521 1.8522 40CrMoV13-9 34CrAlNi7-10 1.8523 1.8550 C22 C25 C30 C35 C40 C45 C50 C55 C60 C22E CK22 C25E CK25 C30E CK30 C35E CK35 C40E CK40 C45E CK45 C50E CK50 C55E CK55 C60 E CK60 40Mn4 90Mn4 20Mn5 30Mn5 36Mn5 36Mn5 28Mn6 1.0402 1.0406 1.0528 1.0501 1.0511 1.0503 1.0540 1.0535 1.0601 1.1151 1.1149 1.1158 1.1163 1.1178 1.1179 1.1181 1.1180 1.1186 1.1189 1.1191 11201 1.1206 1.1241 1.1203 1.1209 1.1221 1.1223 1.1157 1.1273 1.1233 1.1165 1.1167 1.1170 38MnSi4 46MnSi4 37MnSi5 50MnSi4 53MnSi4 42MoV7 36NiCr6 1.5120 1.5121 1.5122 1.5131 1.5141 1.5223 1.5710 36NiCr10 31NiCr14 35NiCr18 28NiCrMo4 22NiCrMo4-7 35NiCrM16 28NiCrMoV8-5 33NiCrMo14-5 33NiCrMoV14-5 32Cr2 44Cr2 46Cr2 28Cr4 34Cr4 37Cr4 41Cr4 25CrMo4 1.5736 1.5755 1.5864 1.6513 1.6755 1.6773 1.6932 1.6956 1.7020 1.7021 4.7003 1.7023 1.3561 1.7006 1.7025 1.7030 1.7036 1.7033 1.7037 1.7037 1.7038 1.7035 1.7039 1.7218 1.7213 34CrMo4 42CrMo4 43CrMo4 48CrMo4 50CrMo4 32CrMo12 36CrNiMo4 34CrNiMo6 30CrNiMo8 51CrV4 58CrV4 42CrV6 30CrMoV9 14CrMoV6-9 X120Mn12 1.7220 1.7226 1.7225 1.7227 1.3563 1.3565 1.7228 1.7361 1.6511 1.6582 1.6580 1.8159 1.8161 1.7561 1.7707 1.7735 1.3401 国C10 C15E4 C15M2 20Cr4 20CrS4 16MnCr5 16MnCrS5 20MnCr5 20MnCrS5 20NiCrMo2 20NiCrMoS2 18CrNiMo7 31CrMo12 33CrAlMo54 41CrAlMo74 31CrMo12 33CrAlmo54 41CrAlMo74 C18 C20 C28E4 C20M2 C25 C25E4 C25M2 C30 C30E4 C30M2 C35 C35E4 C35M2 C40 C40E4 C40M2 C45 C45E4 C45M2 C50 C50E4 C50M2 C55 C55E4 C55M2 C60 C60E4 C60M2 28Mn6 36Mn6 42Mn6 34Cr4 34CrS4 37Cr4 37CrS4 41Cr4 41CrS4 25CrMo4 25CrMoS4 34CrMo4 34CrMoS4 42CrMo4 42CrMoS4 50CrMo4 36CrNiMo4 36CrNiMo6 31CrNiMo8 51CrV6 日SMN420 SMN433 SMN438 SMN443 SMNC420 SMNC443 SCR415 SCR420 SCR430 SCR435 SCR440 SCR445 SCM415 SCM418 SCM420 SCM421 SCM425 SCM425 SCM430 SCM432 SCM435 SCM440 SCM445 SCM822 SNC415 SNC631 SNC815 SNC836 SNCM220 SNCM240 SNCM415 SNCM420 SNCM415 SNCM420 SNCM431 SNCM439 SNCM447 SNCM616 SNCM625 SNCM815 SACM645 SMn420H SMN433H SMn438H SMn433H SMnC420H SMnC443H SCr415H SCr420H SCr430H SCr435H SCr440H SCM415H SCM418H SCM420H SCM425H SCM435H SCM440H SCM445H SCM822H SNC415H SNC631H SNC815H SNCM220H SNCM220H SNCM420H 韩SCr415H SCr420H SCr430H SCr435H SCr440H SNC415H SNC631H SNC815H SNCM220H SNCM420H SCM415H SCM418H SCM420H SCM435H SCM440H SCM445H SCM822H SMn420H SMn433H SMn438H SMn443H SMnC420H SMnC443H SCr21H SCr22H SCr2H SCr3H SCr4H SNC21H SNC2H SNC22H SNCM21H SNCM23H SCM21H SCM22H SCM3H SCM4H SCM5H SCM24H SMn21H SMn1H SMn2H SMn3H SMnC21H SMnC3H 瑞2085 2090 2101 2102 2103 2106 2107 2108 2110 2112 2114 2116 2117 2120 2121 2122 2127 2128 2130 2131 2132 2134 2135 2142 2143 2144 2145 2165 2168 2172 2173 2174 2203 2216 2218 2225 2228 2230 2231 2233 2234 2240 2244 2245 2253 2254 2258 2506 2510 2511 2512 2514 2515 2520 2523 2530 2532 2534 2536 2541 2614 2615 2624 2625 2532 2634 2642 2644 2652 2654 2662 2664 2912 2940 英605M36 606M36 635M15 655M13 655M17 708H37 708M40 709M40 722M24 805A22 805H22 805M17 808M17 817M40 820H17 822H17 822M17 826M40 835H15 835M15 835M30 945M38 523H15 523M15 527A17 527H17 527M17 590A15 590H17 590M17 635A14 635H15 635M15 637A16 637H17 637M17 655H13 655M13 655H17 655H20 655H23 655M17 655M20 655M23 708H20 351 352 36A 34 35 708M20 708M40 709H40 720M32 722M24 805A17 805A20 805A22 805H17 805H20 805H22 805M17 805M20 805M22 808H17 808M17 815H17 815M17 820H17 820M17 822H17 822M17 832H13 832M13 832M13 835H15 835M15 987M39 905M39 美国 A2317 A2330 A2340 A2345 E2512 E2515 E2514 2317 2330 2335 2340 2345 2512 2515 2517 A3115 A3120 A3130 335 3140 A3141 A3145 A3150 A3240 E3310 E3316 3115 3120 3130 3135 3140 X3140 3145 3150 3215 3220 3230 3240 3245 3250 3310 3312 3316 3325 3335 3340 3415 3435 3450 4012 4017 4023 4024 4027 4028 4032 4037 4042 4047 4063 4068 A4068 G13400 G40120 G40230 G40240 G40270 G40280 G40320 G40270 G40420 G40470 G40630 4118 A4119 A4125 TS4130 TS4132 E4132 TS4135 E4135 TS4137 E4137 TS4140 4119 4120 4121 4125 4130 4131 4135 4137 4140 G41400 G41370 G41350 G41310 G41300