SCH13钢表面激光熔覆CoNiCrAlY合金  

CoNiCrAlY alloy deposited on surface of SCH13 steel by laser cladding

作　　者：张松[1] 王明生[1] 张开祥[1] 张春华[1] 颜永根[2] 

机构地区：[1]沈阳工业大学材料科学与工程学院,沈阳110023 [2]宝山钢铁股份有限公司研究院,上海201900

出　　处：《焊接学报》2010年第5期49-52,共4页Transactions of The China Welding Institution

基　　金：辽宁省教育厅研究发展计划资助项目(20060636);沈阳市科技局攻关项目(108149-2-00;1091242-6-00)

摘　　要：采用2kWCO2激光器在SCH13钢表面激光熔覆CoNiCrAlY合金,选择最佳的工艺参数进行激光熔覆处理,可获得性能优良的熔覆层组织.利用扫描电子显微镜及能谱仪、X射线衍射仪、显微硬度计、磨损试验机对激光熔覆层的微观组织形貌、结构及成分、显微硬度和磨损性能进行了系统分析研究.结果表明,CoNiCrAlY合金激光熔覆层与SCH13钢基体存在良好的冶金结合,熔覆层组织细密,无裂纹,稀释率较低,界面处成分均匀平滑过渡;熔覆层主要由γ-Co,FeCr0.29Ni0.16C0.06,FeNi,CoCx及Cr23C6组成;熔覆层平均显微硬度较基体提高3倍以上,其相对耐磨性较基体提高了3.42倍.The surface of SCH113 steel was deposited with CoNiCrAlY alloy by a high power CO2 laser.Through,the excellent coatings can be acquired by the optimized process pa-rameters.The micro-structure,composition,hardness and corro-sive resistance of the coating were examined by scanning electron microscope(including EDS microanalysis),X-ray diffraetome-try,micro thickness meter,wear test machine.The results indi-cated that the coating of CoNiCrAlY alloy has a good metallurgi-cal combination with SCH13 steel,and the other characteristics such as fine microstructure,no cracks,low dilution rate and the smooth transition of elements at the interface.The coatings were consisted of γ-Co,FeCr0.29Ni0.16,FeNi,CoCx and Cr23 C6 phases.The average microhardness of the coating is 3 times higher than that of the SCH13 steel.Furthermore,the wear re-sistance of laser cladded coating is 3.42 times higher than that of the matrix.

关 键 词：SCH13钢 激光熔覆 CoNiCrAlY合金 组织 性能 

分 类 号：TG174[金属学及工艺—金属表面处理]