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Effects of heat treatment on the microstructures and mechanical properties of a new type of nitrogen-containing die steel 被引量:7

Effects of heat treatment on the microstructures and mechanical properties of a new type of nitrogen-containing die steel
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摘要 Nitrogen can increase the strength of steels without weakening the toughness and improve the corrosion resistance at the same time. Compared with conventional nitrogen-free die steels, a new type of nitrogen-containing die steel was developed with many superior properties, such as high strength, high hardness, and good toughness. This paper focused on the effects of heat treatment on the microstruc- tures and mechanical properties of the new type of nitrogen-containing die steel, which were investigated by the optimized deformation process and heat treatment. Isothermal spheroidal annealing and high-temperature quenching as well as high-temperature tempering were ap- plied in the experiment by means of an orthogonal method after the steel was multiply forged. The mechanical properties of nitro- gen-containing die steel forgings are better than the standard of NADCA #207-2003. Nitrogen can increase the strength of steels without weakening the toughness and improve the corrosion resistance at the same time. Compared with conventional nitrogen-free die steels, a new type of nitrogen-containing die steel was developed with many superior properties, such as high strength, high hardness, and good toughness. This paper focused on the effects of heat treatment on the microstruc- tures and mechanical properties of the new type of nitrogen-containing die steel, which were investigated by the optimized deformation process and heat treatment. Isothermal spheroidal annealing and high-temperature quenching as well as high-temperature tempering were ap- plied in the experiment by means of an orthogonal method after the steel was multiply forged. The mechanical properties of nitro- gen-containing die steel forgings are better than the standard of NADCA #207-2003.
出处 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2012年第6期511-517,共7页 矿物冶金与材料学报(英文版)
基金 supported by the National Natural Science Foundation of China (Nos.50974014 and 51174026)
关键词 die steels NITROGEN heat treatment microstructure mechanical properties forgings die steels nitrogen heat treatment microstructure mechanical properties forgings
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