金属热处理 ›› 2023, Vol. 48 ›› Issue (5): 98-103.DOI: 10.13251/j.issn.0254-6051.2023.05.016

• 材料研究 • 上一篇    下一篇

镧对H13钢表面渗铌层组织及性能的影响

谭慎路1, 张越1, 张孟九2, 谢爱军2, 商剑1   

  1. 1.辽宁工业大学 材料科学与工程学院, 辽宁 锦州 121000;
    2.青岛征和工业股份有限公司, 山东 青岛 266705
  • 收稿日期:2022-11-05 修回日期:2023-04-04 出版日期:2023-05-25 发布日期:2023-06-21
  • 通讯作者: 张 越,高级实验师,硕士,E-mail: zyfb_0708@126.com
  • 作者简介:谭慎路(1994—),男,硕士,主要研究方向为材料表面改性,E-mail: 878868323@qq.com。
  • 基金资助:
    辽宁省教育厅科学研究项目(JJL202015410);辽宁省科技厅指导计划(2019-ZD-0703)

Effect of La on microstructure and properties of niobiumized layer on H13 steel

Tan Shenlu1, Zhang Yue1, Zhang Mengjiu2, Xie Aijun2, Shang Jian1   

  1. 1. School of Materials Science and Engineering, Liaoning University of Technology, Jinzhou Liaoning 121000, China;
    2. Qingdao Choho Industrial Co., Ltd., Qingdao Shangdong 266705, China
  • Received:2022-11-05 Revised:2023-04-04 Online:2023-05-25 Published:2023-06-21

摘要: 采用固体粉末包埋法和添加镧的渗铌剂在H13钢表面制备了碳化铌渗层,利用光学显微镜、扫描电镜、能谱仪及X射线衍射仪等研究了稀土镧对渗层组织及摩擦学性能的影响。结果表明,不同La含量(0%~5%)条件下,H13钢表面渗层主要由NbC组成;适量La的加入有利于提高渗层的致密性、硬度及摩擦学性能;随着La含量的增加,渗层显微硬度先增大后减小;当La含量为3%时,渗层组织均匀致密,厚度达7~9 μm,硬度较高(1669 HV0.2)。在相应的摩擦条件下,随着La含量的增加,渗层平均摩擦因数先降低后升高,稀土La含量为3%时渗层的耐磨性最佳。

关键词: La, 渗铌层, 组织, 摩擦磨损性能

Abstract: Effect of La content on microstructure and tribological properties of niobium carbide infiltration layer on H13 steel prepared by solid powder embedding method and niobiumizing agent with La addition was studied by means of optical microscope, scanning electron microscope, energy dispersive spectrometer and X-ray diffractometer. The results show that under different La content (0%-5%) conditions, the infiltration layer on the 3H13 steel is mainly composed of NbC. The addition of appropriate amount of La is beneficial for improving the density, hardness and tribological properties of the infiltration layer. With the increase of La content, the microhardness of the infiltration layer first increases and then decreases. When the La content is 3%, the microstructure of the infiltration layer is uniform and dense, with thickness of 7-9 μm and higher hardness (1669 HV0.2). Under corresponding friction conditions, as the La content increases, the average friction coefficient of the infiltration layer decreases first and then increases, and the wear resistance is the best when the rare earth La content is 3%.

Key words: La, niobiumized layer, microstructure, friction and wear property

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