C
|
Si
|
Μn
|
Cr
|
W
|
V
|
P
|
S
|
0.32~0.42
|
0.80~1.20
|
≤0.40
|
4.50~5.50
|
1.60~2.40
|
0.60~1.00
|
≤0.030
|
≤0.030
|
項目
|
加熱溫度/℃
|
開鍛溫度/℃
|
終鍛溫度/℃
|
冷卻方式
|
鋼錠
鋼坯
|
1140~1180
1100~1150
|
1100~1150
1080~1120
|
925~900
900~850
|
緩冷(砂冷或坑冷)
緩冷(砂冷或坑冷)
|
臨界點
|
Ac1
|
Ac3
|
Ar1
|
Ar3
|
Ms
|
Mf
|
溫度(近似值)/℃
|
800
|
875
|
730
|
840
|
275
|
90
|
溫度/℃
|
22~100
|
22~200
|
22~500
|
22~600
|
線(膨)脹系數(shù)/℃
|
7.6×10
|
8.7×10
|
11.6×10
|
12×10
|
溫度/℃
|
20
|
100
|
200
|
300
|
400
|
500
|
600
|
彈性模量E/MPa
|
230000
|
226000
|
210000
|
210000
|
203000
|
192000
|
178000
|