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

Jing-yuan Li, Peng Zhao, Jun Yanagimoto, Sumio Sugiyama, Yu-lai Chen

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    Jing-yuan Li, Peng Zhao, Jun Yanagimoto, Sumio Sugiyama, and Yu-lai Chen, Effects of heat treatment on the microstructures and mechanical properties of a new type of nitrogen-containing die steel, Int. J. Miner. Metall. Mater., 19(2012), No. 6, pp.511-517. https://dx.doi.org/10.1007/s12613-012-0588-0
    Jing-yuan Li, Peng Zhao, Jun Yanagimoto, Sumio Sugiyama, and Yu-lai Chen, Effects of heat treatment on the microstructures and mechanical properties of a new type of nitrogen-containing die steel, Int. J. Miner. Metall. Mater., 19(2012), No. 6, pp.511-517. https://dx.doi.org/10.1007/s12613-012-0588-0
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    Effects of heat treatment on the microstructures and mechanical properties of a new type of nitrogen-containing die steel

    • School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China

    • Institute of Radar and Avionics, Aviation Industry Corporation of China, Suzhou 215151, China

    • Institute of Industrial Science, the University of Tokyo, Tokyo 153-8505, Japan

    • Engineering Research Institute, University of Science and Technology Beijing, Beijing 100083, China

    基金项目: 

    This work was financially supported by the National Natural Science Foundation of China (Nos.50974014 and 51174026).

      通信作者:

      Yu-lai Chen E-mail: yulaic@nercar.ustb.edu.cn

    中文摘要

    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 microstructures 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 applied in the experiment by means of an orthogonal method after the steel was multiply forged. The mechanical properties of nitrogen-containing die steel forgings are better than the standard of NADCA #207-2003.

     

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

    Author Affilications

      • School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China

      • Institute of Radar and Avionics, Aviation Industry Corporation of China, Suzhou 215151, China

      • Institute of Industrial Science, the University of Tokyo, Tokyo 153-8505, Japan

      • Engineering Research Institute, University of Science and Technology Beijing, Beijing 100083, China

    • Funds: 

      This work was financially supported by the National Natural Science Foundation of China (Nos.50974014 and 51174026).

    • Received: 05 July 2011; Revised: 09 September 2011; Accepted: 16 September 2011;
    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 microstructures 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 applied in the experiment by means of an orthogonal method after the steel was multiply forged. The mechanical properties of nitrogen-containing die steel forgings are better than the standard of NADCA #207-2003.

     

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