Characterization of Plasma Nitriding Layer on 30CrNi2MoVA Steel and Its Effect on Macroscopic Mechanical Properties
XIE Guangrui, YANG Panpan, SUN Ji, YANG Yang*, DING Hongyu, LIU Xingguang, ZHANG Shihong*
Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials, Ministry of Education, Anhui University of Technology, Maanshan 243002, Anhui, China
Abstract: Plasma nitriding was applied to create a nitrided layer on the surface of 30CrNi2MoVA steel. The effect of nitriding temperature on the toughness and tensile properties of the samples were investigated. The morphology of the surface cross-section of the nitrided samples was observed by scanning electron microscopy. The elemental distribution and phase composition of the nitrided layers were analyzed using EDS and XRD. The tribological properties, including the coefficient of friction, wear rate, and abrasion morphology of the nitrided layers were characte-rized. The tensile properties of the samples were assessed under room temperature and high temperature by a universal testing machine. The results indicate that after 8 hours of nitriding at 400, 450, and 500 ℃, the surface of 30CrNi2MoVA steel obtained nitrided layers of varying thicknesses with uniform microstructural composition. After nitriding, the maximum surface hardness at 500 ℃ was 816 HV0.1; the tensile strength of the steel at 450 ℃ was 698.7 MPa, and the yield strength was 575.4 MPa. At 450 ℃, the wear rate of the nitrided layer decreased by 87% compared to the base material of 30CrNi2MoVA steel. Plasma nitriding can produce high-hardness, uniformly structured, metallurgically bonded nitrided layers, significantly improving the wear resistance of 30CrNi2MoVA steel. Simultaneously, nitriding treatment slightly enhances the tensile properties of the specimens but has an adverse effect on their ductility and toughness.
解光瑞, 杨盼盼, 孙吉, 杨阳, 丁红宇, 刘兴光, 张世宏. 30CrNi2MoVA钢等离子体渗氮层表征及其对宏观力学性能的影响[J]. 材料导报, 2025, 39(13): 24050145-8.
XIE Guangrui, YANG Panpan, SUN Ji, YANG Yang, DING Hongyu, LIU Xingguang, ZHANG Shihong. Characterization of Plasma Nitriding Layer on 30CrNi2MoVA Steel and Its Effect on Macroscopic Mechanical Properties. Materials Reports, 2025, 39(13): 24050145-8.
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