Prehardening treatment method of NAK80 mould steel
A technology of pre-hardening treatment and die steel, applied in the field of pre-hardening treatment of precipitation-strengthened plastic mold steel, can solve the problems of long pre-hardening treatment time, short treatment time, low energy consumption, etc., and achieve metallurgical manufacturing cost reduction and productivity. High, simple equipment requirements
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[0016] A certain iron and steel company implements the patent of the present invention, and the precipitation strengthened plastic mold steel NAK80 steel (the weight percentage of the chemical composition content of this mold steel is: carbon 0.10~0.18%, manganese 1.70~2.00%, nickel 2.90~3.40%, molybdenum 0.20~ 0.50%, aluminum 0.70-1.10%, copper 0.80-1.20%, silicon ≤ 0.45%, phosphorus ≤ 0.025%, sulfur ≤ 0.020%) for pre-hardening treatment in the factory, which is characterized by the use of "hot forging forming→quenching→returning "Fire" three-step process to produce finished NAK80 die steel products with a hardness range of HRC38~HRC43: first, hot forging and forming process, using forging presses to heat forge and deform NAK80 die steel to produce finished dies whose dimensions meet the specifications Steel and steel (finished product cross-sectional size 200×795mm, 250×795mm, 300×795mm, 350×795mm), the technical points are: (1) During h...
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