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
30W4Cr2VA GCr6550500460400300GCr9550500460410350GCr15680
580
530
480420380GCr9SiMn 420350GCr15SiMn 480
420
350
Cr6WV 700650600540450T7(A)580530470420370320T8(A)580530470420370332T10(A)580540490430380340T12(A)580
540
490
430
3803409Mn2400340
9Mn2V 500400320Cr2600
530480420320
9Cr2Mo(W)9SiCr 670
6205805204503806SiCr 630590530450380Cr 580530480420350
SiCr 440
CrMn 590540490430340CrWMn 640
600540480420350Cr12650600520470250750700650600550Cr12MoV
740670620570530700
710
650610
W 350
300W？330280CrW5620
5505004504003209CrWMn 6205705204703706SiMnV 6005304704005CrMnMo 5805204703802505CrNiMo 700
6405504503802803Cr2W8V 700630540＜2008Cr3610580510
440
330
Cr4W2MoV W18Cr4V 720700
680W9Cr4V2
670
W12Mo3Cr4V3Co5Si W12Mo9Cr4VCo8W6Mo5Cr4V2W6Mo5Cr4V3Al W9Cr4V2Co10W10Cr4V5Co5
550-650℃回火700±10，工频淬后，700系调
1Cr135805505002Cr13600560520450＜4003Cr13620600570540＜5004Cr136********
550
500＜4009Cr18580320Cr18560
300
1Cr17Ni2650-700550230-500
15/20渗碳后35028015Cr/20Cr渗碳后380
330
20CrMnTi渗碳后20CrMnMo渗碳后12CrNi4(A)渗碳后400310
18Cr2Ni4W(A)渗碳后20MnTiB渗碳后30CrMnTi渗碳后35CrMnTi
ZG35ZG45ZG55400340280
ZGMnB 600-650350-400500-550
450
ZG40Mn ZG40Cr
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
参看序号4参看序号6参看序号10
参看序号15
55-60
＞60
以下为碳素及低合金钢
180180250
180
＜160＜180＜180220
180
180
200
水冷回火作弹簧回火
＜160230以下为弹簧钢
230250230＜170380180
330
＜200火温度（℃）的关系
备注
250＜200以下为轴承钢
270＜180270＜180280＜200280
＜180250＜180以下为工具钢250、模具钢
250250250280250230
300100280＜200280＜200370＜250280＜180280
170 ＜1000℃淬火 ＞1000℃淬火380
＜180
960-1030℃淬火550(二次硬化峰值1050-1130℃淬火
对应回火温度)
240220270＜200250＜180
＜200＜200200300220
550±10二次作热冲模650以下为高速钢
640
＜160＜200＜180回火
570±10℃（三次回火）
560±10℃（二次或三次回火）
00系调质温度
＜160550±10℃（三次回火）
以下为不锈钢
220＜150250＜200
220＜160以下为渗碳钢
240＜180240＜180240＜180240240＜200240＜180240＜180
＜180
以下为铸钢
180
46
05