Preparation method of cold work die steel material
A technology of cold work die steel and alloy composition, applied in the direction of manufacturing tools, heat treatment equipment, quenching agents, etc., can solve the problems of low toughness and can not meet the needs of machining
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[0008] A preparation method of cold work die steel material, including melting, oxidation, detection and adjustment of alloy composition, refining, casting, heat treatment, the weight percentage of its chemical elements is: carbon 0.8-0.9, silicon 1.1-1.3, manganese 2.1-2.3 , molybdenum 0.8-0.9, nickel 0.1-0.15, titanium-.6-0.7, chromium 1.1-1.2, aluminum 0.3-0.4, Hf1-2, Nb0.06-0.08, Bi2.5-2.8, Sb0.03-0.05, Both S and P are less than 0.03, and the balance is iron;
[0009] Heat treatment means: the casting is heated up to 910-935°C at a rate of 210-230°C / hour, and held for 4-6 hours; then, the temperature is raised to 1060-1085°C at a rate of 35-55°C / hour, and held for 1-2 hours; Then cool down to 320-340°C at a rate of 170-190°C / hour and keep warm for 2-3 hours; then cool down to 160-180°C at a rate of 40-70°C / hour and keep warm for 2-3 hours; then heat at 90-100°C Raise the temperature to 560-580°C at a rate of / hour, and keep it warm for 2-3 hours; then put it into 0°C wa...
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