表面技术Issue(4)：84-88,5.DOI:10.16490/j.cnki.issn.1001-3660.2015.04.015
1Cr18Ni9Ti不锈钢表面电火花熔覆WC涂层特性研究
Characterization of Electro-spark Cladding WC Coating on Surface of 1 Cr18 Ni9 Ti Stainless Steel
摘要
Abstract
ABSTRACT:Objective To investigate the microstructure and properties of the WC coating on the surface of the 1Cr18Ni9Ti stain-less steel prepared by electro-spark cladding technique. Methods The WC cladding coating was produced on the surface of stain-less steel 1Cr18Ni9Ti by electro-spark cladding technique. The morphology, microstructure, microhardness and wear resistance of the cladding coating were investigated. The corrosion resistance of the cladding coating in 3. 5%NaCl solution was evaluated by lin-ear polarization. Results The cladding coating was uniform, continuous, compact, and well metallurgically bonded with the sub-strate material. The highest microhardness was 1680HV0. 3 and the average hardness of the cladding coating was 1336HV0. 3, which was about 4 times higher than that of the substrate (260HV). The wear resistance of the cladding coating was 4 times as high as that of the substrate and the main wear mechanism was adhesive and abrasive wear. In the 3. 5%NaCl corroding liquor, the <br> corrosion potential of the cladding coating moved reversely by 165 mV, and the breakdown potential of cladding coating was lower than that of the substrate, while the maintaining passive current density was higher than that of the substrate. Conclusion The clad-ding coating had high hardness and high wear resistance, and the main wear mechanism was adhesive and abrasive wear. However, in the 3. 5%NaCl corrosion system, the corrosion resistance of the1Cr18Ni9Ti stainless steel substrate was better than the cladding coating.关键词
不锈钢/电火花熔覆技术/WC熔覆层/显微组织/耐磨性/耐腐蚀性能Key words
stainless steel/electrospark cladding technique/WC cladding coating/microstructure/wear resistance/corrosion resistance分类
矿业与冶金引用本文复制引用
张瑞珠,赵元元,严大考,郭朋彦,张洁溪,韩婷婷,黄荣浩..1Cr18Ni9Ti不锈钢表面电火花熔覆WC涂层特性研究[J].表面技术,2015,(4):84-88,5.基金项目
水利部科技推广项目计划(TG1420) （TG1420）
国家级大学生创新创业训练计划项目(201310078057)Fund:Supported by Ministry of Science and Technology Promotion Projects (TG1420) and National Students＇Innovation and Entrepreneurship Training Pro-gram(201310078057) （201310078057）
