各钢种AC1和AC3根据化学成份的计算公式

1、各钢种AC1和AC3根据化学成份的计算公式最好的办法是查阅“钢的临界温度参数手册”一类资料，我们的前辈已经为我们做了大量实验工作，常用钢数椐还是比较齐全的，而且可靠。借花献佛，转载如下Useful Equations For Hardenable Alloy SteelsAe1 (F) 1333 - 25 x Mn + 40 x Si + 42 x Cr - 26 x NiAe3 (F) 1570 - 323 x C - 25 x Mn + 80 x Si - 3 x Cr - 32 x NiAc1 (C) 723 -10.7 x Mn + 29.1 x Si +16.9 x Cr -16.9

2、 x Ni + 290 x As + 6.38 x WAc3 (C) 910 - 203 x sqr(C) + 44.7 x Si - 15.2 x Ni + 31.5 x Mo + 104 x V + 13.1 x WMs (F) 930 - 600 x C - 60 x Mn - 20 x Si - 50 x Cr - 30 x Ni - 20 x Mo - 20 x WM10 (F) Ms - 18M50 (F) Ms - 85M90 (F) Ms - 185Mf (F) Ms - 387Bs (F) 1526 - 486 x C - 162 x Mn - 126 x Cr - 67 x

3、 Ni - 149 x MoB50 (F) Bs - 108Bf (F) Bs - 216Carburized Case Depth (in.) .025 sqr(t), for 1700FCarburized Case Depth (in.) .021 sqr(t), for 1650FCarburized Case Depth (in.) .018 sqr(t), for 1600F(t = time in hours)转换式=5（F32）/ 9针对亚共析钢： Ac1（）=723-20.7Mn-16.9Ni+29.1Si+16.9Cr+290As+6.38W 偏差值：11.5 Ac3（）=

4、910-203sqr(C) + 44.7 Si - 15.2Ni + 31.5Mo + 104V + 13.1W 偏差值：16.7 Ms （）=539 - 423C - 30.4Mn - 20Si - 12.1Cr -17.7Ni - 7.5Mo 偏差值：25 M10=Ms-10 （3） M50=Ms-47 （9） M90=Ms-103 （12） Mf=Ms-215 （25） Bs （）=830 - 270C - 90Mn - 70Cr -37Ni - 83Mo 偏差值：25 B50=Bs-60 （25） Bf=Bs-120 （25）Ac3=910-203C0.5-13.2Ni+44.7Si+

5、104V+31.5Mo+13.1W Ac1=723-10.7Mn-16.9Ni+29.1Si+16.9Cr+290As+6.38W常用钢种的临界温度钢号临界温度（近似值），（C）Ac1Ac3Ar3Ar1Ms优质碳素结构钢08F，0810152025303540455060708515Mn20Mn30Mn4050Mn普通低合金结构钢16Mn09Mn2V15MnTi15MnV18MnMoNb合金结构钢20Mn230Mn240Mn245Mn225Mn2V42Mn2V35SiMn50SiMn20Cr30Cr40Cr45Cr50Cr20CrV40Cr732724735735735732724724724

6、725727730725735735734726720736736734700720736725718713715725750710766740743721721768755874876863855840813802790780760766743737863854812790760849867849867865830850850840804766770840770830797838815782771771840790854850840835824796774760751721743727695840835796768779780756740727704720703799730693693704

7、74568068268568068066768068068269069069368568267568966061563564661062762764064563670267069366066078270038022040034032033033030535525021838CrSi20CrMn30CrMnSi18CrMnTi30CrMnTi35CrMo40CrMnMo38CrMoAl20CrNi40CrNi12CrNi312Cr2Ni420Cr2Ni440CrNiMo20Mn2B20MnTiB20MnVB45B40MnB40MnVB弹簧钢65708565Mn60Si2Mn50CrMn50CrVA55SiMnMoVNb滚动轴承钢GCr9GCr15GCr15SiMn76376576074076575573580073373171572072073273072072072573573072773072372675575075274473074577081083883082579080078094080476983078078077485384384077078077475274373776581077578877588787275579870573074075079070266066073679577072070068173