About 4CrW2Si chrome silicon steel is based on adding a certain amount of tungsten and the formation of the steel, since entry into the tungsten and help save the relatively small during the quenching of the grain, which is likely to be in the tempered condition higher toughness. 4CrW2Si steel also has a certain hardenability and high temperature strength. The steel used for the manufacture of high impact loading operation tools such as pneumatic tools, chisel, cutting-edge composite blanking die, die, cold punching cut with scissors and other tools, as well as some small hot die.
Physical properties
4CrW2Si critical temperature of steel is shown in Table 2-17-2.
4CrW2Si critical temperature of steel|
Critical point |
Ac1 | Ac3 | Ms |
| Temperature (approximate) / ℃ | 780 | 840 | 315 |
Chemical composition
4CrW2Si steel chemical composition shown in Table 2-17-1.
4CrW2Si steel chemical composition (GB/T1299-2000) w /%| C | Si | Mn | Cr | W | P | S |
| 0.35~0.45 | 0.80~1.10 | ≤0.40 | 1.00~1.30 | 2.00~2.50 | ≤0.030 | ≤0.030 |
4CrW2Si steel thermal processing are shown in Table 2-17-3.
4CrW2Si steel thermal processing
|
Project |
Heating temperature / ℃ | On forging temperature / ℃ | Final forging temperature / ℃ | Cooling |
| Ingot Billet |
1180~1220 1150~1180 |
1150~1180 1100~1140 |
≥850 ≥800 |
Slow cooling Slow cooling |
