Product Overview

D2 Tool Steel

D2 tool steel is highly wear-resistant and has low deformation.Cold Work Tool Steel, high carbon tool steel, with a carbon content of up to1.5%, chromium content up to 11.5%, and hardness can reach 60HRC after heat treatment. D2 steel can be used to manufacture cold work tool steels that have large cross-sections, complex shapes, withstand high impact forces, and require high wear resistance, such as silicon steel sheet punching dies, cold cutting scissors, and trimming dies. D2 steel has a cold white color, hardness higher than SKD11 steel, but toughness is not as good as SKD11 steel. Small notches can easily appear in high-stress areas; SKD11 steel has a shiny appearance and the best overall performance.

Advantages

1. Good machinability and stable dimensions after heat treatment.

2. Excellent machinability.

3. Excellent dimensional stability during quenching.

4. After quenching and tempering, there is a good combination of high surface hardness and toughness.

Characteristics of D2 Tool Steel

High wear resistance, canVacuum heat treatmenttoHRC60°-62°, with excellent machining performance.

Heat Treatment Process of D2 Tool Steel

After rough machining, heat to600~650℃, hold for 2 hours, cool in the furnace to 500℃, and air cool after removal.

Mechanical Properties of D2 Tool Steel

Hardness : Annealed, ≤255HB, indentation diameter ≥3.8mm; quenched, ≥59HRC

Quenching Precautions for D2 Tool Steel

After quenching, tempering should be done promptly to prevent cracking, and surface decarburization should be avoided. Gauges and high-precision molds should undergo deep cryogenic treatment (-70℃), and high-temperature tempering should be used to reduce workpiece deformation. The high-temperature tempering temperature is 500~560℃, with hardness greater than 58HRC.

Heat Treatment Specifications for D2 Tool Steel

Heat treatment specifications: quenching, preheat at 820±15℃, heat to 1000±6℃ (salt bath) or 1010±6℃ (furnace controlled atmosphere), hold for 10~20 minutes, air cool, temper at 200±6℃.

Stress Relief Annealing: After rough machining, heat to600~650℃, hold for 2 hours, cool in the furnace to 500℃, and air cool after removal.

Quenching: Slowly heat the workpiece to600℃, hold for 20 minutes for the first preheating, then raise to 850℃, hold for 30 minutes for the second preheating, and finally heat to 1020~1040℃, hold for 25~40 minutes, and air cool.

Tempering: Tempering should be done immediately after quenching, and temper at least twice, with each holding time not less than2h

Note: Tempering should be done promptly after quenching to prevent cracking, and surface decarburization should be avoided. Gauges and high-precision molds should undergo deep cryogenic treatment (-70℃), and high-temperature tempering should be used to reduce workpiece deformation. The high-temperature tempering temperature is 500~560℃, with hardness greater than 58HRC.

Hardness : Annealed, ≤255HB, indentation diameter ≥3.8mm, quenched, ≥59HRC.

Heat Treatment Specifications and Metallographic Structure: Quenching, preheat at 820±15℃, heat to 1000±6℃ (salt bath) or 1010±6℃ (furnace controlled atmosphere), hold for 10~20 minutes, air cool, temper at 200±6℃.

D2 Tool Steel Factory Condition

Annealed toHB255

Applications of D2 Tool Steel

Used forHardware stamping dies, stretching dies, stainless steel sheet cutting dies, high hardness cutting dies, shearing knife dies, thread rolling dies, hardware parts manufacturing, mechanical manufacturing, etc.

Examples of D2 Tool Steel Applications

1) Used for deep drawing dies of refrigerator compressor rear covers, with a quenching hardness of 56~58HRC.

2) To improve the service life of D2 cold work dies, the method of adding rare earth elements is used, which greatly improves the wear resistance and impact toughness of the steel, thereby achieving the goal of extending the service life of round die steel.

3) Due to the higher V and Mo content in D2 steel compared to Cr12MoV steel, it has better overall performance, and the traditional Cr12MoV steel will gradually be replaced.

4) The thread rolling wheels and cold stamping dies for off-table adjustment plates made of D2 steel can increase the service life by 5 to 6 times compared to Cr12MoV steel.