主要用于制造在冷状态（室温）条件下进行压制成形的模具，如冷冲压模具、冷拉伸模具、冷镦模具、冷挤压模具、压印模具、辊压模具等。冷作模具品种多、应用范围广，其产值占模具总产值的30%~40%。采用的钢号很多，一般采用高碳过共析钢和莱氏钢体，如碳素工具钢、低合金油淬冷作模具钢、空淬冷作模具钢、高碳高铬型冷作模具钢、高速钢、低碳高速钢和基本钢及用粉末冶金工艺生产的高合金模具材料等。常用钢号及化学成分见表1-1-1。 表1-1-1 常用冷作模具钢化学成分w/% 钢号 | C | Si | Mn | Cr | W | Mo | V | 其他 | 油淬冷作模具钢 | 9Mn2V | 0.85~0.95 | ≤0.40 | 1.70~2.00 |
|
|
| 0.10~0.25 |
| CrWMn | 0.90~1.05 | ≤0.40 | 0.80~1.10 | 0.90~1.20 | 1.20~1.60 |
|
|
| 9CrWMn | 0.85~0.95 | ≤0.40 | 0.90~1.20 | 0.50~0.80 | 0.50~0.80 |
|
|
| 9SiCr | 0.85~0.95 | 1.20~1.60 | 0.30~0.60 | 0.95~1.25 |
|
|
|
| Cr | 0.95~1.10 | ≤0.40 | ≤0.40 | 1.30~1.70 |
|
|
|
| 空淬冷作模具钢 | Cr5Mo1V | 0.95~1.05 | ≤0.50 | ≤1.00 | 4.75~5.50 |
| 0.90~1.40 | 0.15~0.50 |
| Cr6WV | 1.00~1.15 | ≤0.40 | ≤0.40 | 5.50~7.00 | 1.10~1.50 |
| 0.50~0.70 |
| Cr4W2MoV | 1.12~1.25 | 0.40~0.70 | ≤0.40 | 3.50~4.00 | 1.90~2.60 | 0.80~1.20 | 0.80~1.10 |
| 8Cr2MnWMoVS | 0.75~0.85 | ≤0.40 | 1.30~1.70 | 2.30~2.60 | 0.70~1.00 | 0.50~0.80 | 0.10~0.25 | S 0.10 | 高碳冷作模具钢 | Cr12 | 2.00~2.30 | ≤0.40 | ≤0.40 | 11.50~13.00 |
|
|
|
| Cr12MoV | 1.45~1.70 | ≤0.40 | ≤0.40 | 11.00~12.50 |
| 0.40~0.60 | 0.15~0.30 |
| Cr12Mo1V1 | 1.40~1.60 | ≤0.60 | 0.60 | 11.00~13.00 |
| 0.70~1.20 | ≤1.10 | Co≤1.0 |
|
钢号 |
C |
Si |
Mn |
Cr |
W |
Mo |
V |
其他 |
|
基体钢和低碳高速钢 |
6W6Mo5Cr4V |
0.55~0.65 |
≤0.40 |
≤0.60 |
3.70~4.30 |
6.00~7.00 |
4.50~5.50 |
0.70~1.10 |
|
|
6Cr4W3Mo2VNb |
0.60~0.70 |
≤0.40 |
≤0.40 |
3.80~4.40 |
2.50~3.50 |
1.80~2.50 |
0.80~1.20 |
Nb
0.20~0.35 |
|
7W7Cr4MoV |
0.60~0.70 |
≤0.40 |
≤0.40 |
4.50~5.00 |
6.50~7.50 |
0.20~0.50 |
0.40~0.70 |
|
|
高韧性高耐磨性冷作模具钢 |
7Cr7Mo2V2Si |
0.70~0.80 |
0.70~1.20 |
≤0.40 |
6.50~7.50 |
|
2.00~3.00 |
1.70~2.20 |
|
|
火焰淬火冷作模具钢 |
7CrSiMnMoV |
0.65~0.75 |
0.85~1.15 |
0.65~1.05 |
0.90~1.20 |
0.30~0.50 |
|
0.15~0.30 |
|