摘要
在等离子喷涂Fe基WC涂层的表面预置不同厚度的纳米SiC粉末,通过激光重熔工艺制备出不同纳米SiC含量的涂层。利用金相显微镜、扫描电子显微镜(SEM)、X射线衍射仪(XRD)对重熔层的金相组织、微观形貌、相成分进行分析;利用显微硬度仪测试重熔层的表面和截面显微硬度;利用MMG-10型摩擦磨损试验机检测重熔层的耐磨性能。结果表明:随着纳米SiC含量的提高,重熔层的晶粒细化程度提高,孔隙的尺寸和数量降低,重熔层中CrSi_2、Cr_7C_3等硬质中间相增加,并且生成的新相(Fe_2Si、CrSi)也随之增多;涂层的显微硬度和耐磨性能也随着纳米SiC的增多而提高。
The nano-SiC powders with different thickness were coated on the surface of the plasma-coated FeWC cermet coating,then the coating with different nano-SiC content was prepared by using laser remelting process.The metallographic organization,microstructure and phase composition of the coating were studied by means of metallographic microscope,scanning electron microscopy（SEM） and X-ray diffraction（XRD）.The microhardness of the surface and cross section of the coating was measured by microhardness tester.The wear resistance was studied on the MMG-10 friction and wear testing machine. The results show that with the increase of nano-SiC content,the degree of grain refinement of the coating is improved,the porosity is decreased,and the hard phases such as CrSi2 and Cr7C2 are increased in the coating,and the new phase（ Fe2Si,CrSi） is also increased.The microhardness and wear resistance of the coating are also increased with the increase of nano-SiC content.
作者
赵运才
张继武
上官绪超
ZHAO Yuncai;ZHANG Jiwu;SHANGGUAN Xuchao(School of Mechanical and Electrical Engineering,Jiangxi University of Science and Technology,Ganzhou Jiangxi341000,China)
出处
《润滑与密封》
CAS
CSCD
北大核心
2018年第6期23-29,共7页
Lubrication Engineering
基金
国家自然科学基金项目(51565017)
高端轴承摩擦学技术与应用国家地方联合工程实验室开放基金项目(201713)
江西省自然科学基金项目(2012BAB206026)
江西省教育厅项目(GJJ14424)
