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热处理对Ni-P/WS2复合镀层硬度及自润滑性能的影响

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  • 1. 西京学院机电技术系; 2. 西京学院机械工程学院; 3. 西安交通大学电气工程学院
赵金国(1972- ),硕士,副教授,高级工程师,主要从事汽车机械及车身结构材料方面的科研和教学工作,E - mail: zhaojinguo1974@qq.com

收稿日期: 2021-09-30

  修回日期: 2021-10-29

  录用日期: 2021-11-30

  网络出版日期: 2023-12-27

基金资助

国家科技重大专项(2017ZX04011-010);陕西省自然科学基础研究计划(2020JM - 645)资助

Effects of Heat Treatment on the Hardness and Self-Lubrication of Ni-P / WS2 Composite Coating

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  • 1a. Department of Mechanical and Electrical Technology, 1b. School of Mechanical Engineering, Xijing University, Xi’an 710123, China;2. School of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710049, China

Received date: 2021-09-30

  Revised date: 2021-10-29

  Accepted date: 2021-11-30

  Online published: 2023-12-27

摘要

在Ni - P镀层中加入颗粒形成复合镀层可进一步提高镀层力学性能、耐腐蚀性和润滑性能。为此,对Q235钢表面实施化学共沉淀,形成Ni - P/WS2复合镀层,并对镀层实施后续热处理,利用电子探针(EPMA)、X射线衍射(XRD)、扫描电镜(SEM)和硬度计,研究了镀液中WS2含量及沉淀后的热处理对Ni - P/WS2复合镀层硬度和自润滑性能的影响机理。结果表明:镀液中P含量稳定,受镀液中WS2颗粒浓度变化的影响不大,有利于镀层在后续的热处理中析出适量的体心立方Ni3P硬化相,从而有效提高复合镀层表面硬度;镀层中WS2颗粒对镀层表面起到润滑作用,因此可有效减小镀层表面摩擦系数,而热处理可使镀层中析出体心立方的Ni3P相,增加了表面对WS2颗粒的支撑作用,有利于增强镀层表面的自润滑,有效减小摩擦系数。

本文引用格式

赵金国, 肖传军, 乔勋, 阎治安 . 热处理对Ni-P/WS2复合镀层硬度及自润滑性能的影响[J]. 材料保护, 2022 , 55(3) : 19 -22 . DOI: 10.16577/j.issn.1001-1560.2022.0061

Abstract

Adding particles to the Ni - P coating for forming a composite coating could further improve the mechanical properties, corrosion resistance and lubricating properties of the coating. Hence, Ni - P/WS2 composite coatings were prepared by chemical coprecipitation on the surface of Q235 steel, and the coatings were post - treated by heating. Subsequently, the influence mechanism of WS2 content in plating solution and heat treatment after precipitation on the hardness and self - lubrocating performance of Ni - P/WS2 composite coating was studied by electron microprobe (EPMA), X - ray diffractometer (XRD), scanning electron microscope (SEM) and hardness tester. Results showed that the content of P in the plating solution was stable, which was not affected by the concentration of WS2 particles in plating solution, and it was beneficial to precipitation of a proper amount of body centered cubic Ni3P hardening phase in the subsequent heat treatment, causing that the surface hardness of the composite coating was effectively improved. Moreover, WS2 particles in the coating played a lubricating role on the surface of the coating, which could effectively reduce the friction coefficient of the coating surface, and the heat treatment enabled the precipitation of body centered cubic Ni3P phase in the coating. Thus, the surface support for WS2 particles was enhanced, which was conducive to increase the self - lubrication of the coating surface and effectively reduce the friction coefficient.
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