氩弧熔敷原位自生TiC-TiB_2/Fe复合涂层组织与磨损性能的研究  

Microstructure and Properties of TiC-TiB_2/Fe Composite Coating by Argon Arc Cladding

作　　者：王振廷[1,2] 周晓辉[2] 

机构地区：[1]哈尔滨理工大学,黑龙江哈尔滨150080 [2]黑龙江科技学院,黑龙江哈尔滨150027

出　　处：《稀有金属材料与工程》2009年第A01期155-158,共4页Rare Metal Materials and Engineering

摘　　要：以Ti、B4C和Fe粉为原料,利用氩弧熔敷技术在Q235钢基体表面制备出原位自生TiC-TiB2增强Fe基复合涂层。利用扫描电镜(SEM)、X射线衍射仪(XRD)、显微硬度计和滑动磨损试验机对复合涂层的显微组织、硬度、耐磨性进行了研究。结果表明:熔敷层组织为TiC、TiB2和α-Fe,TiC以四面体和花瓣状先析出,后析出的TiB2多以六边形、短棒状存在,涂层中TiB2含量大于TiC含量;熔敷层与基体呈冶金结合,无裂纹、气孔等缺陷;涂层维氏硬度为8300～9000MPa,比基体提高近4倍;最大耐磨性比基体提高近20倍,在室温干滑动磨损试验条件下具有优异的耐磨损性能。Fe based metallic ceramic coating reinforced by in-situ synthesized TiC and TiB2 particles was prepared on the surface of Q235 by means of argon arc cladding（AAC） using Ti, B4C and Fe powders as the binding materials. The microstructure, micro-hardness and wear resistance were investigated using SEM, XRD, Micro-hardness Tester and Friction＆Wear Tester. The results showed that the main phases of coating were TiC, TiB2 and α-Fe, and the content of TiB2 was higher than that of TiC. TiC particles presented tetrahedron and petal shape, and most TiB2 existed in hexagon and 6osh form. Excellent bonding between the coating and the Q235 steel substrate is uniform, continuous and almost defect-free and the particles were dispersively distributed in the clad coating. The hardness of coating was between 8300 and 9000 MPa. The micro-hardness was improved about 4 times, and maximal abrasion resistance was improved about 20 times. The argon arc cladding composite coating had high hardness and excellent wear resistance under dry sliding wear test conditions.

关 键 词：氩弧熔敷 原位合成 TIC-TIB2 显微组织 耐磨性 

分 类 号：TG174.4[金属学及工艺—金属表面处理]