0.5%Mo添加对NM400级耐磨钢组织性能的调控

doi:10.13251/j.issn.0254-6051.2025.04.010

摘要/Abstract

摘要： 通过光学显微镜(OM)、电子背散射衍射(EBSD)和JMatPro软件模拟,系统研究了添加0.5%Mo对NM400级耐磨钢微观组织演变、相变行为及力学性能的作用机制。研究表明,钼元素的引入显著提升了试验钢的淬透性,促使材料在较低冷速下即可形成板条马氏体组织。随着M₂C型碳化物析出量的增加,分级组织结构得到显著细化,从而协同强化了晶粒细化和固溶强化的效果。相较于未添加钼的0Mo钢,含0.5%Mo的试验钢在保持良好塑性的同时,其屈服强度和抗拉强度分别提升至996.6 MPa和1350.0 MPa,但断裂总延伸率略有下降。

关键词: 耐磨钢, Mo元素, 淬透性, 微观组织

Abstract: Effect of 0.5%Mo addition on the microstructure, phase transformation behavior, and mechanical properties of NM400 grade wear resistant steel was investigated through optical microscope (OM), electron backscatter diffraction (EBSD), and JMatPro software analysis. The results demonstrate that the Mo addition significantly enhances the hardenability of the tested steel, enabling the formation of lath martensite at lower cooling rates, and with the increase of precipitation of M₂C carbides, the refinement of hierarchical microstructure is significant, thereby improving grain refinement strengthening and solution strengthening effects. Compared with the steel without Mo addition, the 0.5%Mo steel exhibits enhanced yield strength and tensile strength reaching 996.6 MPa and 1350.0 MPa, respectively, while maintaining good plasticity, though accompanied by a slight reduction in total elongation.

Key words: wear-resistant steel, Mo element, hardenability, microstructure

中图分类号:

TG162.83

马瑞杰, 许立雄, 张毅, 皮昕宇. 0.5%Mo添加对NM400级耐磨钢组织性能的调控[J]. 金属热处理, 2025, 50(4): 72-79.

Ma Ruijie, Xu Lixiong, Zhang Yi, Pi Xinyu. Microstructure-property regulation of NM400 grade wear-resistant steel with 0.5%Mo addition[J]. Heat Treatment of Metals, 2025, 50(4): 72-79.

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