铁基含TiC陶瓷粉电弧喷涂粉芯丝材的研究  

Study on Iron Base Arc Spraying Cored Wire with TiC Ceramic Powders

作　　者：贺定勇[1] 张发云[1] 蒋建敏[1] 傅斌友[1] 栗卓新[1] 王智慧[1] 

机构地区：[1]北京工业大学材料科学与工程学院,北京100022

出　　处：《中国表面工程》2006年第5期41-44,共4页China Surface Engineering

基　　金：北京市自然科学基金(2062005)资助项目

摘　　要：采用电弧喷涂含TiC陶瓷粉末的粉芯丝材,在低碳钢基体上制备了铁基复合涂层。用MLS-225型湿砂橡胶轮磨损试验机测试了涂层的抗磨粒磨损性能。利用光学显微镜、SEM、XRD分析技术对涂层的显微组织结构、磨损表面和相组成进了研究。结果表明:采用电弧喷涂工艺可制备含TiC陶瓷硬质相的复合涂层,在铁基体上弥散分布着一定量的TiC硬质颗粒,使整个涂层得到强化,涂层显微硬度平均值约为1137HV0.1,涂层的抗磨粒磨损性能较好,相对Q235钢提高了6倍。涂层磨损机制主要为犁沟切削和脆性断裂。Iron base composite coatings were deposited on mild steel substrate by arc spraying using cored wire with TiC ceramic powders. The abrasive wear resistance was examined on the MLS-225 model wet sand/rubber wheel tester. The microstructure, phase compositions and worn surface morphologies of the coatings were observed by means of optical, scanning electron microscopy and X-ray diffraction. The results showed that the composite coating was obviously reinforced by the TiC hard particles distributed in the iron-based coating. The average microhardness of the coating was about 1137 HV0.1. it showed excellent abrasive wear resistance about 6 times higher than that of the Q235 mild steel. Wear mechanisms of coating was mainly micro-ploughing and brittle fracture.

关 键 词：铁基复合涂层 电弧喷涂 TiC陶瓷 耐磨粒磨损 

分 类 号：TG174.442[金属学及工艺—金属表面处理]