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常用热处理参数及硬度对照表

25-3030-3535-4040-4545-5050-5530350300200<16035520460420350290<17040540490430370310<20045550520450380320300505605304603903303106058054046040036031030Mn 490400350300200

40Mn 540200

40Mn2*54042037032027024050Mn2*60048040030035SiMn *56052046040035020042Mn2V 60052047043035020040Cr 58051047042034020045Cr 62053048042034020050Cr 65057048040028023040CrSi *630550520450400330

40CrMn*580510230200

30CrMnSi*62053050043034018040CrV 64056050045032020045CrV 64056050045032020050CrV 65056050045038028030CrMo 56044040020035CrMo 60055048040030020042CrMo 62058050040030040CrMnMo 55050045040025040CrNi*58051046042034020037CrNi3A*57050042030030040CrNiMoA 62058054048042032035CrMoV 640590500360300<20038CrSi*63055052045040033038CrMoAiA

68063053043032045B 55045050B 420?400360

280

40MnB*65045040MnVB 60046045CrNi*57050043036028023065620550500450380300706205505004503803108562055050045038033065Mn 66060052044038030055SiMn 55049060Si2MnA 620

600

55052047042050CrMn 580

500450400

60Si2CrV

460

420

钢号回火后洛氏硬度(HRC)与回火温度