高温锻压模具表面激光熔覆铁基合金粉末的特性研究  

Study on Characteristics of Fe Based Alloy Coating Prepared by Laser Cladding on High-temperature Forging Mould

作　　者：穆亚辉[1] 程改青[1] 

机构地区：[1]许昌职业技术学院机电工程系,河南许昌461000

出　　处：《热加工工艺》2009年第16期110-112,共3页Hot Working Technology

摘　　要：针对激光熔覆修复发动机叶片报废高温锻压模具中使用热喷涂粉末开裂敏感性较大的缺点以及在高温(800℃以上)服役环境中,熔覆层容易开裂、脱落的问题,自配了铁基合金粉末,采用激光熔覆技术,在高温锻压模具表面制备了复合涂层;利用OM、SEM、XRD和硬度计对复合涂层进行表征。结果表明:当自制铁基熔覆粉末的质量百分比为0.5C、25Cr、1.0Ni、1.5Si、1.5B、余量Fe时,获得了无裂纹的熔覆层,熔覆层与基材实现了良好的化学冶金结合。As to the problems for big cracking susceptibility caused by thermal spraying powders used in the failing aeroengine high-temperature forging mould repaired with laser cladding technology and easy abscission of coating caused in high temperature service environment. The microstructure and properties of coating prepared by laser cladding were studied by means of OM, SEM and XRD. The results show that no cracks coating and excellent chemical metallurgical bonding between cladding coating and substrate are obtained under the condition of optimum formulas （wt1%：0.3C, 25Cr, 1.0Ni, 1.7Si, 1.5B, rest Fe）.

关 键 词：高温锻压模具 激光熔覆 合金粉末 组织 

分 类 号：TG174.44[金属学及工艺—金属表面处理]