Abstract
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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This work was financially supported by the National Natural Science Foundation of China (Nos.50974014 and 51174026).
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Li, Jy., Zhao, P., Yanagimoto, J. et al. 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, 511–517 (2012). https://doi.org/10.1007/s12613-012-0588-0
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DOI: https://doi.org/10.1007/s12613-012-0588-0