齿轮钢表面激光熔覆Ni基涂层工艺参数优化

doi:10.13251/j.issn.0254-6051.2023.11.044

金属热处理 ›› 2023, Vol. 48 ›› Issue (11): 266-275.DOI: 10.13251/j.issn.0254-6051.2023.11.044

齿轮钢表面激光熔覆Ni基涂层工艺参数优化

师陆冰^1,2, 杜佳俊¹, 张志宏², 丁昊昊¹, 王文健¹, 刘忠明²

1.西南交通大学摩擦学研究所, 四川成都 610031;
2.郑州机械研究所有限公司, 河南郑州 450001

收稿日期:2023-05-29 修回日期:2023-09-25 出版日期:2023-11-25 发布日期:2023-12-27
作者简介:师陆冰(1991—),男,工程师,博士,主要研究方向为齿轮传动,E-mail:shilubing91@163.com
基金资助:
中国博士后科学基金(021M692951); 交通部三峡后续工作科技项目(SXHXGZ-SCJ-2020-1)

Optimization of process parameters for laser clad Ni-based coatings on gear steel surface

Shi Lubing^1,2, Du Jiajun¹, Zhang Zhihong², Ding Haohao¹, Wang Wenjian¹, Liu Zhongming²

1. Tribology Research Institute, Southwest Jiaotong University, Chengdu Sichuan 610031, China;
2. Zhengzhou Research Institute of Mechanical Engineering Co., Ltd., Zhengzhou Henan 450001, China

Received:2023-05-29 Revised:2023-09-25 Online:2023-11-25 Published:2023-12-27

摘要/Abstract

摘要： 采用激光熔覆技术在18CrNiMo7-6齿轮钢表面制备Ni基涂层,研究激光功率、扫描速度和送粉率对Ni基涂层熔覆质量和微观组织的影响,建立激光熔覆工艺参数与涂层宏观尺寸、微观组织和显微硬度之间的关系。结果表明,随着激光功率的增大,涂层的熔高、熔宽、熔深增大,微观组织细化,显微硬度增大;随着扫描速度的增大,涂层熔高、熔宽、熔深减小,微观组织粗化,显微硬度减小;随着送粉率的增大,涂层的熔高增大,熔宽先增大后减小,熔深减小,涂层微观组织细化,显微硬度增大。以涂层宏观形貌、微观组织结构和显微硬度为涂层质量评估指标,优选得到的最佳工艺参数为:激光功率700 W,扫描速度2 mm/s,送粉率11.1 g/min。

关键词: 激光熔覆, 18CrNiMo7-6齿轮钢, 工艺参数, 微观组织, 显微硬度

Abstract: Ni-based coating was fabricated on the surface of 18CrNiMo7-6 gear steel by laser cladding technique, and the effects of laser power, scanning speed, and powder feeding rate on the cladding quality and microstructure of Ni-based coating were investigated. The relationship between laser cladding process parameters and the macroscopic size, microstructure and microhardness of the clad coating was established. The results show that, with the increase of laser power, the melted height, width and depth of the coating increase, the microstructure is refined, and the microhardness increases. With the increase of scanning speed, the melted height and width of the coating increase, the melted depth decreases, the microstructure is coarsened, and the microhardness decreases. With the increase of powder feeding rate, the melted height of the coating increases, the melted width increases first and then decreases, the melted depth decreases, the microstructure is refined, and the microhardness increases. Based on the macroscopic morphology, microstructure and microhardness of the clad coating, the optimal process parameters are selected as the laser power of 700 W, scanning speed of 2 mm/s, and powder feeding rate of 11.1 g/min.

Key words: laser cladding, 18CrNiMo7-6 gear steel, process parameter, microstructure, microhardness

中图分类号:

TH117.1

师陆冰, 杜佳俊, 张志宏, 丁昊昊, 王文健, 刘忠明. 齿轮钢表面激光熔覆Ni基涂层工艺参数优化[J]. 金属热处理, 2023, 48(11): 266-275.

Shi Lubing, Du Jiajun, Zhang Zhihong, Ding Haohao, Wang Wenjian, Liu Zhongming. Optimization of process parameters for laser clad Ni-based coatings on gear steel surface[J]. Heat Treatment of Metals, 2023, 48(11): 266-275.

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齿轮钢表面激光熔覆Ni基涂层工艺参数优化

Optimization of process parameters for laser clad Ni-based coatings on gear steel surface

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