氩弧熔覆原位自生(Fe,W,Cr)_(23)C_6/γ–Ni基复合熔覆层组织与耐磨性能  

Microstructure and Wear Resistance of in-situ Synthesized (Fe,W,Cr)_(23)C_6/γ-Ni Composite Coating by Argon Arc Cladding

作　　者：史晓萍[1] 刘荣祥[1] 

机构地区：[1]黑龙江科技学院材料科学与工程学院,哈尔滨150027

出　　处：《中国表面工程》2008年第4期18-21,共4页China Surface Engineering

基　　金：黑龙江省普通高等学校骨干教师创新计划项目(1054G0406)

摘　　要：以W粉、C粉和Ni60A粉为原料,采用氩弧熔覆工艺在Q235钢基体上制备出原位自生(Fe,W,Cr)23C6增强Ni基复合熔覆层。借助扫描电镜(SEM)、X射线衍射仪(XRD)、显微硬度计及滑动磨损试验机对复合熔覆层的显微组织、硬度、耐磨性进行了研究。结果表明,熔覆层与基体呈冶金结合,无裂纹、气孔等缺陷,涂层显微硬度的最大可达1213HV,耐磨性比Q235钢提高18倍,在室温干滑动磨损试验条件下具有优异的耐磨损性能。工业试验表明使用该技术在16D、24D叶轮表面制备的耐磨熔覆层,可使其使用寿命提高3倍以上。Metallic ceramic coating reinforced by in-situ synthesized （Fe,W, Cr） 23C6 particles was prepared on Q235 steel substrate by argon arc cladding with W, C and Ni60 powders. The microstrucmre, micro-hardness and wear resistance were investigated by SEM, XRD, Micro-hardness Tester and Friction ＆Wear Tester. The results showed that excellent bonding between the coating and the Q235 steel substrate was uniform, continuous and almost defect-free. The maximum hardness value achieved 1213 HV, the abrasion resistance was improved about 18 times compared to that of the Q235 steel. The argon arc cladding composite coating had high hardness and excellent wear resistance under dry sliding wear test conditions. Industrial test showed that the wear-resistant coating made by this technology on the surface of the 16 D, 24D impeller can improve the service life more than three times.

关 键 词：氩弧熔覆 原位自生 (Fe W Cr)23C6 复合熔覆层 耐磨性 

分 类 号：TG174.442[金属学及工艺—金属表面处理]