24 July 2021 Mould Steel Bar
3Cr3Mo3W2V Mould Steel Bar
3Cr3Mo3W2V steel is a hot work die steel with good cold working and hot working properties, and a wide range of quenching and tempering temperature; it has high thermal strength, thermal fatigue properties, and good wear resistance and tempering stability.
3Cr3Mo3W2V steel is suitable for manufacturing hot work molds such as upsetting and press forging, and has a long service life. It can also be used to make thin plates with a thickness of not more than 2MM, high-efficiency blanking dies, punching dies and impression dies, various scissors, inlaid blades, woodworking knives, thread rolling dies and wear-resistant sliders, cold heading dies, hot Solid resin molding die, deep drawing molding die, cold extrusion die.
Chemical composition:
| C | Si | Μn | Cr | Mo | W | V | P | S |
|---|---|---|---|---|---|---|---|---|
0.32～0.42 | 0.60～0.90 | ≤0.65 | 2.80～3.30 | 2.50～3.00 | 1.20～1.80 | 0.80～1.20 | ≤0.03 | ≤0.03 |
Mechanical Properties:
| Yield Rp0.2 (MPa) | Tensile Rm (MPa) | Impact KV/Ku (J) | Elongation A (%) | Reduction in cross section on fracture Z (%) | As-Heat-Treated Condition | Brinell hardness (HBW) |
|---|---|---|---|---|---|---|
| 644 (≥) | 769 (≥) | 11 | 23 | 32 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 413 |
Forging:
Oil-quenched die steel has some crack sensitivity. It is not suitable to heat rapidly during forging heating. It is best to perform a preheating at 650-750 degrees. The forging heating temperature is 1130-1150 degrees, and the final forging temperature should be greater than 800-850 degrees. The upper limit temperature is used when the steel ingot is forged. The lower limit temperature is taken when the blank is forged
Annealing:
Generally, annealing adopts 780-800 degrees, heat preservation for 4-6 hours, cooling to 550 degrees at ≤50 degrees/hour, air cooling, isothermal annealing uses 700-800 degrees heat preservation 2-4 sales, and then 670-720 degrees heat preservation, keeping 2-4 hours, cooling to 500 degrees at a cooling rate of ≤50 degrees/hour, air cooling, annealing hardness 241-197H