Ion nitriding process of PH13-8Mo steel

doi:10.13251/j.issn.0254-6051.2020.12.023

Abstract

Abstract: Plasma nitriding process parameters of PH13-8Mo steel were studied, including nitriding temperature, nitriding time and surface roughness of parts. The results show that with the increase of nitriding temperature, nitriding time and the decrease of surface roughness, the nitrided layer thickness of the PH13-8Mo steel increases. The surface roughness of parts has great influence on the brittleness grade of nitrided layer, when the surface roughness of parts is 6.3 μm, the brittleness grade reaches grade III. Nitriding time, nitriding temperature and surface roughness have little effect on the hardness of nitrided layer. When the nitriding temperature is 540 ℃, the nitriding time is 22 h, and the surface roughness of parts is 0.8 μm, the nitrided layer thickness can reach 197.5 μm, the nitrided layer hardness can reach 1083 HV0.2, and the brittleness grade is grade II.

Key words: PH13-8Mo steel, nitriding process, roughness, thickness of nitrided layer, hardness of nitrided layer, brittleness grade

CLC Number:

TG156.82

Zhang Yi, Meng Xuan, Zhu Zhiqiang, Zhao Zhipeng, Tong Wei, Wu Ruigang, Wang Jin. Ion nitriding process of PH13-8Mo steel[J]. Heat Treatment of Metals, 2020, 45(12): 119-122.

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