金属热处理 ›› 2021, Vol. 46 ›› Issue (1): 114-119.DOI: 10.13251/j.issn.0254-6051.2021.01.022

• 材料研究 • 上一篇    下一篇

Nb微合金化对Cr-Ni-Mo渗碳齿轮钢组织和性能的影响

桂伟民1, 刘义1, 周根树2, 何亮亮1, 王梦梦1, 汤文馨1   

  1. 1.陕西法士特齿轮有限责任公司,陕西 西安 710119;
    2.西安交通大学 材料科学与工程学院,陕西 西安 710049
  • 收稿日期:2020-06-26 出版日期:2021-01-25 发布日期:2021-01-26
  • 作者简介:桂伟民(1989—),男,工程师,博士,主要研究方向为齿轮钢研发,E-mail:wmgui_fast@163.com

Effect of Nb microalloying on microstructure and properties of Cr-Ni-Mo carburized gear steel

Gui Weimin1, Liu Yi1, Zhou Genshu2, He Liangliang1, Wang Mengmeng1, Tang Wenxin1   

  1. 1. Shaanxi Fast Gear Co.,Ltd.,Xi'an Shaanxi 710119,China;
    2. School of Materials Science and Engineering,Xi'an Jiaotong University,Xi'an Shaanxi 710049,China
  • Received:2020-06-26 Online:2021-01-25 Published:2021-01-26

摘要: 研究Nb元素对Cr-Ni-Mo系合金在不同渗碳热处理工艺下组织和性能的影响。结果表明,不同渗碳工艺下Nb元素对表面硬度及表面残留奥氏体含量、非马组织影响不大。但是,通过Nb元素细化晶粒的试验钢,在较长的渗碳工艺下能使得有效硬化层深加深10%且获得更细的表层马氏体片层组织。

关键词: 微合金化, Nb元素, 渗碳热处理, 微观组织, 性能

Abstract: Effect of Nb on microstructure and properties of Cr-Ni-Mo alloyed gear steel under different carburizing processes was investigated.The results show that Nb element has little influence on surface hardness,retained austenite content and non-martensite microstructure in the carburizing layer under different carburizing processes.However,the test steel with Nb element refining grain can make the effective hardening depth deepen by 10% and obtain a finer surface lamellar structure of lath martensite after a longer carburizing process.

Key words: microalloying, Nb element, carburizing heat treatment, microstructure, properties

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