1.2344/H13/SKD61 tool steel is characterized by its high hardness, wear resistance, toughness, and corrosion resistance. AISI H13 steel can withstand high temperature and high pressure loads. AISI H13 steel can reduce the tooling wear and improve production efficiency.
Chemiscal composition
Heat treatment process:
(1) Preheating: The temperature is 600-630 ℃, holding time is 1.5-2.0 hours (It depends on the mold size). Then heat it to 830-850℃,and the heat preservation time is 1.5-2.0 hours. The process is called pretreatment before quenching, which can reasonably adjust the internal microscopic defects of workpiece that is necessary for quenching.
(2) Quenching: On the basis of pretreatment, heat it to 1040-1080℃, keep the temperature for 2.0-2.5 hours, and then have oil quenching out of the furnace.
(3) Tempering: After quenching, the mould has a larger internal stress inside. It must be tempered to the workpiece in 1~2h in order to eliminate the stress caused by quenching. What’s more, it should also be uniform heating before tempering workpiece to avoid cracking. The specific method is: heating the workpiece to 380-400℃ for 1 hours’ heat preservation and then slowly heat it to 580-600℃. After a tempering and 2h’s heat preservation time, the natural air cooling to room temperature after two times tempering with the temperature 560-580℃ and the preservation time is 2h. Then air cooling is outside the furnace.
According to the heat treatment process, it is necessary to add that: Because H13 (4Cr5MoSiV1) steel is very sensitive to the quenching temperature, and it has excellent quenching performance at high temperature, so quenching in high temperature is needed.
(4) Nitridation: The surface hardness can reach 1000 - 1250HV after soft nitriding treatment at 525 ℃. Nitriding time for 20 hours, 30 hours and 60 hours, the depth of the hardened layer were 0.20mm, 0.25 mm, 0.30 mm. Soft nitriding treatments at 575 ℃, working surface hardness of about 950HV. Usually soft nitriding for 2 hours, the depth of the hardened layer is 10 - 20um.
The specialty of the steel:
With good toughness and resistance to high temperature fatigue performance, it can withstand the temperature of fusion, suitable for high temperature in the long-term work and has good cutting and polishing performance.
Main uses:
It is suitable for making aluminum, zinc, copper alloy extrusion die, die casting, hot forged die, and hot shear blades. What’s more, it’s the ideal material for making top rod and sleeve, as well as producing high yield of plastic mold.
Contact: Amy Ruan
Phone: 0086-15897795404
E-mail: manager@risinmouldsteel.com
Whatsapp:0086-15897795404
Add: Sanyuan Road, Xisai Mountain Industrial Park, Huangshi City, Hubei Province
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