标题：Microstructure and wear properties of TiC/FeCrBSi surface composite coating prepared by laser cladding
作者：Wang XH;Zhang M;Liu XM;Qu SY;Zou ZD
作者机构：[Wang, X.H] School of Materials Science and Engineering, Shandong University, Jinan, 250061, China;[ Zhang, M] School of Mechanical Engineering, Shand 更多
通讯作者地址：[Wang, XH]Shandong Univ, Sch Mat Sci & Engn, Jinan 250061, Peoples R China.
来源：Surface & Coatings Technology
关键词：laser cladding;in situ TiC;microstructure;wear resistance;Fe-based composite coating;IN-SITU FORMATION;MATRIX COMPOSITES;TIC PARTICLES;FABRICATION;BEHAVIOR;CONTACTS;COPPER;STEEL
摘要：Titanium carbide particles reinforced Fe-based surface composite coatings were fabricated by laser cladding using a 5 kW CO2 laser. The microstructure, phase structure and wear properties were investigated by means of scanning electron microscopy, transmission electron microscopy and X-ray diffraction, as well as dry sliding wear test. The results showed that TiC carbides were formed via in situ reaction between ferrotitanium and graphite in the molten pool during the laser-clad process. The morphology of TiC is mainly cubic and dendritic form; and the TiC carbides were distributed uniformly in the composite coating. The TiC/matrix interface was found to be free from cracks and deleterious phases. The coatings reinforced by TiC particles revealed higher wear resistance and lower friction coefficient than that of the substrate and FeCrBSi laser-clad coating. (c) 2008 Elsevier B.V All rights reserved.