Friction properties of H13 steel nitrocarburizing-modified by hollow cathode plasma source

doi:10.13251/j.issn.0254-6051.2025.01.049

Abstract

Abstract: To improve the hardness and wear resistance of H13 steel, surface treatment of H13 steel was carried out by hollow cathode ion discharge nitrocarburizing (520, 530 and 540 ℃ for 5 h), and the microstructure, hardness and friction and wear properties of the H13 after nitrocarburizing were analyzed. The results show that an iron-nitride compound diffusion layer is formed on the surface of the H13 steel after nitrocarburizing, which results in significantly improvement of the hardness and wear resistance. The surface hardness of the specimen after nitrocarburizing at 530 ℃ is the highest, which is 999.3 HV0.1, 120% higher than that of the specimen after quenching and tempering, and the depth of the hardening layer is about 175 μm based on the measurement of hardness gradient. The friction and wear test under oil lubrication condition shows that the wear volume of the specimen after nitrocarburizing at 540 ℃ is 83% lower than that of the specimen after quenching and tempering.

Key words: hollow cathode, nitrocarburizing, H13 mold steel, friction and wear

CLC Number:

TG17

Liao Yongfa, Shang Yong, Li Yang, Liu Zhongli, Jiang Mingquan, Zhou Zelong, Gao Yue. Friction properties of H13 steel nitrocarburizing-modified by hollow cathode plasma source[J]. Heat Treatment of Metals, 2025, 50(1): 325-331.

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