High-heat-resistance hot work die steel and preparation method
A technology of hot work die steel and high heat resistance, applied in the field of high heat resistance hot work die steel, can solve problems such as limited application fields, and achieve the effects of simple preparation process, good application value, and high thermal fatigue resistance.
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[0027] The high-performance hot-worked die steel of the present invention achieves high performance by optimizing alloy composition and optimizing preparation process. The preparation method is: (1) Melting and alloying: according to C: 0.38%~0.44%, Cr: 3.8%~4.4%, Mo: 1.8%~2.4%, Si: 0.2%~0.6%, Mn: 0.5% ~0.8%, V is 0.5%~0.7%, Ni is 0.8%~1.2%, Cu is 0.02%~0.05%, Ta is 0.08%~0.12%, Nb is 0.01%~0.03%, W is 0.008%~0.016 %, Co is 0.008%~0.016%, P and S content are less than 0.030%, and the balance is the mass percentage of Fe. Perform alloying, batching, smelting, and chemical composition analysis in front of the furnace until the chemical composition meets the requirements and then tapping; (2) Heat treatment process: Annealing process is: heating temperature is 700~730℃, heat preservation is 4~6h, cooling with furnace; rough processing after annealing; quenching and tempering process after rough processin...
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