2Cr3Mo3 VNb
2cr3mo3 vnb steel is steel in 3cr3mo3 v based on the improvements made, which is characterized by low carbon content, increasing the Ming content in the alloy is a low-carbon hot-work tool steel, high strength and toughness and thermal stability of heat of. The tensile strength of steel at 650-700 ℃,300-700 ℃ impact toughness, 750 ℃ high temperature hardness, thermal stability,620-7000c, 600 ℃ oxidation resistance, 650 ℃ and 750 ℃ thermal fatigue of,800-850 ℃ of heat resistance and abrasion resistance 800 - 1 100 ℃ forging performance than 3cr2 w8 v steel. Suitable for production of high-speed impact of a large die upsetting machines, small machines forging dies, roll forging machine model and the thermal fatigue strength or thermal performance requirements of high thermal extrusion and aluminum die-casting mold and other chemical components:
Forging process
Quenching process
Tempering performance
|
c |
si |
mn |
cr |
mo |
v |
p |
s |
|
0.20～0.30 |
≦0.60 |
≦0.35 |
2.50～3.20 |
2.70～3.20 |
0.60～1.20 |
≦0.03 |
≦0.030 |
|
Project |
Heating temperature / ℃ |
Before forging temperature / ℃ |
Final forging temperature / ℃ |
Cooling |
|
Ingot |
1170～1200 |
1140～1170 |
≥900 |
Cold or cold sand pit |
|
Billet |
1160～1180 |
1120～1150 |
≥850 |
Cold or cold sand pit |
|
The first warm-up |
Second warm-up |
Quenching temperature ℃ |
Holding time s / mm |
Cooling medium |
Hardness hrc |
|
550 ℃ heat |
550 ℃ heat |
1080±10 |
20～25 |
Oil |
45.5～47 |
|
Tempering temperature (℃) |
100 |
200 |
300 |
400 |
450 |
500 |
550 |
600 |
650 |
700 |
|
Hardness (hrc) |
48.0 |
48.0 |
48.5 |
46.5 |
47.5 |
47.0 |
48.5 |
44.5 |
44.5 |
28.5
|
