常用热处理参数及硬度对照表
25-3030-3535-4040-4545-5050-5555-60＞60
30350300200＜16035520460420350290＜17040540490430370310＜200455505204503803203001805056053046039033031018060580540460400360310250180
30Mn 490400350300200
40Mn 540200
40Mn2*54042037032027024050Mn2*60048040030035SiMn *56052046040035020042Mn2V 60052047043035020040Cr 580510470420340200＜16045Cr 620530480420340200＜18050Cr 650570480400280230＜18040CrSi *630550520450400330220
40CrMn*580510230200
30CrMnSi*62053050043034018040CrV 64056050045032020045CrV 64056050045032020050CrV 65056050045038028018030CrMo 56044040020035CrMo 60055048040030020042CrMo 62058050040030018040CrMnMo 55050045040025040CrNi*58051046042034020037CrNi3A*57050042030030040CrNiMoA
620
580
540480420320
钢号回火后洛氏硬度（HRC）与回火温度（℃）的关系
35CrMoV 640590500360300＜20038CrSi*63055052045040033038CrMoAiA
680630530430320
200
45B 55045050B 420?400360
280
40MnB*65045040MnVB 60046045CrNi*570500430360280230＜16065620550500450380300230706205505004503803102308562055050045038033025065Mn 660600520440380
300
230＜17055SiMn 55049060Si2MnA 620
600
550520470420380180
50CrMn 580
500450400330
60Si2CrV 460
420
30W4Cr2VA GCr6550500460400300250＜200GCr9550500460410350270＜180GCr15680
580530480420380270＜180GCr9SiMn 420350280＜200GCr15SiMn 480420350280＜180Cr6WV 700650600540450250＜180T7(A)580530470420370320250T8(A)580530470420370332250T10(A)580540490430380340250T12(A)
580
540490430
380
340
250
＜200＜160＜200
550-650℃回火
9Mn2400340280
9Mn2V 500400320250Cr2600
5304804203202309Cr2Mo(W)9SiCr 670
6205805204503803001006SiCr 630590530450380280＜200Cr 580530480420350280
＜200SiCr 440370
＜250CrMn 590540490430340280＜180CrWMn 640
600540480420350280170Cr12650600520470250 750700650600550Cr12MoV
740670620570530380＜180
700
710
650610
550(二次硬化峰值对应回火温度)
W 350
300240W？330280220CrW5620
550500450400320270＜2009CrWMn 620570520470370250＜180
6SiMnV 6005304704005CrMnMo 580520470380250＜2005CrNiMo 700
640550450380280＜2003Cr2W8V 700630540＜2008Cr3610580510
440
330
200Cr4W2MoV 300220
W18Cr4V 720700
680650W9Cr4V2
670
640
W12Mo3Cr4V3Co5Si W12Mo9Cr4VCo8
＜200
＜180＜160550±10℃（三次回火）700±10，工频淬后，700系调质温度570±10℃（三次回火）
W6Mo5Cr4V2W6Mo5Cr4V3Al W9Cr4V2Co10W10Cr4V5Co51Cr135805505002Cr13600560520450＜4003Cr13620600570540＜5004Cr13630
610
580
550
500＜4009Cr185********＜150Cr18560
300
250＜200
1Cr17Ni2650-700550230-500
15/20渗碳后350280220＜16015Cr/20Cr渗碳后380
330
240＜18020CrMnTi渗碳后240＜18020CrMnMo渗碳后240＜18012CrNi4(A)渗碳后400310
24018Cr2Ni4W(A)渗碳后240＜20020MnTiB渗碳后240＜18030CrMnTi渗碳后240＜180
35CrMnTi
＜180
ZG35ZG45ZG55400340280
180
ZGMnB 600-650350-400500-550
450
ZG40Mn ZG40Cr
参看序号15
参看序号4参看序号6参看序号10
570±10℃（三次回火）560±10℃（二次或三次回火）
注：
1）有“*”者表示回火脆性较大，通常不在250-400℃间回火；
2）回火温度依硬度要求的中值偏上而定；
3）80号钢的550±10℃二次回火系1030±10℃淬火作热冲模；中下限温度为冷冲模淬火，仅低温回火。
备注以下为碳素及低合金钢
水冷回火作弹簧回火以下为弹簧钢
以下为轴承钢以下为工具钢、模具钢
＜1000℃淬火
＞1000℃淬火
960-1030℃淬火1050-1130℃淬火
550±10二次作热冲模以下为高速钢
以下为不锈钢以下为渗碳钢以下为铸钢