朝展鋼號(hào)
|
C
|
Si
|
Cr
|
Ni
|
Mn
|
||||
≤0.07
|
≤1.0
|
15.5-17.5
|
3.0-5.0
|
≤1.0
|
|||||
朝展鋼號(hào)
|
Cu
|
Nb
|
s
|
p
|
|||||
17-4PH
|
3.0-5.0
|
0.15-0.45
|
≤0.030
|
≤0.035
|
熱處理制度
|
бb
MPa
|
бs
MPa
|
δ5
%
|
ψ
%
|
硬度
HRC
|
附注
|
|
|
|
|
HB≤363
|
①
|
|
1040℃水或空冷,480℃回火4h空冷(H900)
|
≥1314
|
≥1177
|
≥10
|
≥40
|
≥40
|
|
1040℃水或空冷,495℃回火4h空冷(H925)
|
≥1177
|
≥1070
|
≥10
|
≥44
|
≥38
|
|
1040℃水或空冷,550℃回火4h空冷(H1025)
|
≥1070
|
≥1000
|
≥12
|
≥45
|
≥35
|
|
1040℃水或空冷,580℃回火4h空冷(H1075)
|
≥1000
|
≥863
|
≥13
|
≥45
|
≥31
|
|
1040℃水或空冷,620℃回火4h空冷(H1150)
|
≥932
|
≥725
|
≥16
|
≥50
|
≥28
|
|
58
|
36
|
|||||
1040℃水冷,620℃4h空冷(H1150)
|
1000
|
862
|
19
|
60
|
33
|
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