42CrMo钢属于超高强度钢,具有高强度和韧性,淬透性也较好,无明显的回火脆性,调质处理后有较高的疲劳极限和抗多次冲击能力,低温冲击韧性良好。该钢适宜制造要求一定强度和韧性的大、中型塑料模具。
适用范围:
强度、淬透性高,韧性好,淬火时变形小,高温时有高的蠕变强度和持久强度。用于制造要求较35CrMo钢强度更高和调质截面更大的锻件,如机车牵引用的大齿轮、增压器传动齿轮、压力容器齿轮、后轴、受载荷极大的连杆及弹簧夹,也可用于 2000m以下石油深井钻杆接头与打捞工具,并且可以用于折弯机的模具等。
化学成分:
|
C |
0.38~0.45% |
|
Si |
0.17~0.37% |
|
Mn |
0.50~0.80% |
|
S |
允许残余含量≤0.035% |
|
P |
允许残余含量≤0.035% |
|
Cr |
0.90~1.20% |
|
Ni |
允许残余含量≤0.030% |
|
Cu |
允许残余含量≤0.030% |
|
Mo |
0.15~0.25% |
力学性能:
|
抗拉强度σb(MPa) |
≥1080(110) |
|
屈服强度σs(MPa) |
≥930(95) |
|
伸长率δ5(%) |
≥12 |
|
断面收缩率ψ(%) |
≥45 |
|
冲击功Akv(J) |
≥63 |
|
冲击韧性值αkv(J/cm2) |
≥78(8) |
|
硬度 |
≤217HB |
|
试样尺寸 |
试样毛坯尺寸为25mm |
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