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D2 cold working tool steel
Cr12m01v1Specialty
- High wear resistance
- High compressive strength
- Excellent hardenability
- Excellent stability during hardening
- Excellent resistance to temper softening
D2 are often recommended for applications requiring good wear resistance and moderate toughness (impact resistant molds).
Besides being applicable to the range of CR12 applications, it can also be used in punching and cutting thick and hard materials and in forming die which is vulnerable to bending stress and high impact load.
D2 can provide a variety of supply states: hot rolling, pre-addition and fine-addition; also can supply with hollow rods.
Chemical constituents％
| C | Si | Mn | P | S | V | Cr | Mo | Cu | Factory Status |
| 1.40/1.60 | ≤0.40 | ≤0.60 | ≤0.030 | ≤0.030 | 0.60/1.10 | 11.00/13.00 | 0.70/1.20 | ≤1.00 | AnnealingHB ≤ 255 |
Heat treatment
Soft Annealing
Heated to 850℃ in a protective atmosphere, cooled to 650℃ at a cooling rate of 10℃/ h, then air cooled.
De-stress annealing
To eliminate the residual stress generated after roughing, the mold is heated to 650℃, and the furnace is cooled to 500℃ after 2 hours of heat preservation, and then cooled.
Quenching
Preheating temperature:650～700℃
Austenitizing temperature: 990～1050℃，usually 1000～1040℃
Cooling media
oil (for simple molds only), vacuum (high speed airflow), high pressure gas/gas, air cooling after 180~550 grade quenching in salt bath furnace or fluid furnace.
Note: The mold is cooled to 50~70℃ and tempered immediately.
Tempering
The tempering temperature is selected according to the required hardness according to the tempering curve, and the tempering temperature is twice and cooled to room temperature each time.
