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超声 - 射流电沉积Ni/Co - TiN纳米镀层的工艺参数优化及性能研究

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  • 东北石油大学机械科学与工程学院
张思栋(1996-),硕士,主要从事纳米复合材料研究,E - mail:2279187774@qq.com

收稿日期: 2021-11-25

  修回日期: 2021-12-21

  录用日期: 2022-01-21

  网络出版日期: 2024-01-09

基金资助

国家自然科学基金项目(51974089)资助

Process Parameter Optimization and Performance Study of Ultrasonic - Jet Electrodeposited Ni/Co - TiN Nano - Coatings

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  • College of Mechanical Science and Engineering, Northeast Petroleum University, Daqing 163318, China

Received date: 2021-11-25

  Revised date: 2021-12-21

  Accepted date: 2022-01-21

  Online published: 2024-01-09

摘要

为提升40Cr钢的力学性能,采用超声 - 射流电沉积法在其表面制得Ni/Co - TiN纳米镀层。利用扫描电镜(SEM)、能谱仪(EDS)和X射线衍射仪(XRD)测试镀层的表面形貌、元素组成及相结构,并采用显微硬度计、摩擦磨损试验机和电化学工作站对镀层显微硬度、耐磨性能和耐腐蚀性能进行测试。随着镀液中TiN纳米粒子浓度、射流速度或超声波功率的增大,Ni/Co - TiN纳米镀层的显微硬度均呈现先提高后降低的变化趋势。由正交试验结果可知,镀层制备的最优工艺参数组合为:射流速度4 m/s,超声波功率120 W,TiN纳米粒子浓度10 g/L。该工艺参数组合下制备的Ni/Co - TiN纳米镀层的表面形貌平整致密,Ni/Co晶粒尺寸得到明显细化,TiN粒子弥散分布其中;镀层的显微硬度高达689.82 HV,其摩擦系数较小且磨损失重较少,镀层自腐蚀电位和自腐蚀电流密度分别为-0.338 V和2.13×10-6 A/cm2

本文引用格式

苑博旭, 马春阳, 张思栋 . 超声 - 射流电沉积Ni/Co - TiN纳米镀层的工艺参数优化及性能研究[J]. 材料保护, 2022 , 55(5) : 92 -98 . DOI: 10.16577/j.issn.1001-1560.2022.0130

Abstract

In order to improve the mechanical properties of 40Cr steel, a Ni/Co - TiN nanocoating was prepared on its surface by ultrasonic jet electrodeposition. The surface morphology, phase structure and elemental composition of the coating were observed by scanning electron microscope (SEM), energy dispersive spectrometer (EDS) and x - ray diffractometer (XRD). Moreover, the microhardness, wear resistance and corrosion resistance of coating were tested by microhardness tester, friction and wear tester and electrochemical workstation. Results showed that the microhardness of the Ni/Co - TiN nanocoating increased first and then decreased with the rising of the concentration of TiN nanoparticle, the jet speed of plating solution or the ultrasonic power. From the orthogonal experiment results, it could be obtained that the optimal process parameters were a jet speed of the plating solution of 4 m/s, an ultrasonic power of 120 W, and a concentration of TiN nanoparticle of 10 g/L. The Ni/Co grain sizes in the coating prepared using the optimal process parameters were obviously refined, TiN particles were dispersed in the coating, and the appearance of the coating was smooth and dense. Moreover, the microhardness of the coating was up to 689.82 HV, the friction coefficient was small, and the weight loss was small. The self - corrosion potential (Ecorr) and self - corrosion current density (Jcorr) were -0.338 V and 2.13×10-6 A/cm2, respectively.
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