等离子熔敷TiC/γ-(Fe,Ni)复合涂层组织与耐磨性  

Microstructure and wear resistance of plasma clad TiC/γ-(Fe,Ni) composite coating

作　　者：刘元富[1] 刘秀波[2] 张伟[1] 杨思泽[3] 

机构地区：[1]北京交通大学机械与电子控制工程学院材料研究所,北京100044 [2]苏州大学机电工程学院,江苏苏州215006 [3]中国科学院物理研究所,北京100080

出　　处：《材料热处理学报》2012年第3期119-123,共5页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金资助项目(10735090);清华大学摩擦学国家重点试验室开放基金资助项目(SKLTKF09B01)

摘　　要：为了提高奥氏体不锈钢的耐磨性能,扩大其应用范围,以Ti-C-Fe-Ni混合合金粉末为原料,利用等离子熔敷技术在1Cr18Ni9Ti奥氏体不锈钢表面原位合成了TiC增强耐磨复合涂层。分析了涂层的显微组织结构,测试了涂层沿层深方向的硬度分布,评价了涂层在室温干滑动磨损试验条件下的摩擦磨损性能,结果表明:等离子熔敷TiC金属陶瓷增强复合涂层显微组织细小均匀,由花瓣状和少量颗粒状TiC初生相均匀分布在TiC/γ-(Fe,Ni)共晶基体上组成,涂层与不锈钢基材之间形成了完全冶金结合,涂层平均显微硬度约790 HV,涂层在室温干滑动磨损试验条件下表现出良好的耐磨性及较低的摩擦系数。For highly improving wear resistance of austenitic stainless steel and extending its application scope,the Ti-C-Fe-Ni powders blend was used as precursor material for in situ synthesizing a wear resistant TiC reinforced composite coating on 1Cr18Ni9Ti austenitic stainless steel substrate by plasma cladding technique.Microstructure of the plasma clad composite coating was analyzed.Microhardness along the depth direction of the coating was tested.Wear and friction behavior of the coating was evaluated under dry sliding wear test condition at room temperature.The results show that the plasma clad TiC reinforced composite coating has a fine and homogeneous microstructure consisting of ＂petal-like＂ and small amount of granular TiC primary dendrites uniformly distributed in the TiC/γ-（Fe,Ni） eutectic matrix.The plasma clad composite coating is metallurgically bonded to the stainless steel substrate.Mean hardness value of the plasma clad composite coating is about 790 HV.The plasma clad TiC/γ-（Fe,Ni） composite coating exhibits excellent wear resistance,low and stable friction coefficient.

关 键 词：等离子熔敷 TIC 涂层 显微组织 耐磨性 

分 类 号：TG115[金属学及工艺—物理冶金] TH117.3[金属学及工艺—金属学]