Y2O3对激光熔覆修复航空发动机制件报废锻压模具组织与硬度的影响  

Effect of Y2O3 on Microstructure and Hardness of Failing Forging Mould of Aeroengine Pieces Repaired by Laser Cladding

作　　者：刘其斌[1] 刘厚权 李宝增[1] 

机构地区：[1]贵州大学蔡家关校区材料学院,贵阳550003 [2]首钢贵阳特殊钢有限责任公司,贵阳550002

出　　处：《模具工程》2011年第1期82-84,共3页Mould &Die Project

摘　　要：为了实现对航空发动机制什报废高温锻J矗模共的修复．自配了添加不同含量Y2O3的合金粉术，采用激光熔覆技术，对模具进行修复。利用OM、SEM、XRD和硬度计研究了Y2O3对熔覆层组织结构的影响．结果表明：熔覆层与基体之间实现了良好的冶金结合，当不含Y2O3时，熔覆层的基体相为a-Fe，其上分布着一些非品相、金属间化合物如Fe2B、Fe3C、FeSi等，纽织粗大，硬度平均为HV660；当添加Y2O3后熔覆层中还生成了少量的尖品石类矿物质如FeFe2O4，品粒明裂细化。当Y2O3为1．0wt．％时，平均硬度为FIVT03，当Y2O3为2．0wt．％时，平均硬度为HV743，当Y2O3为3．0wt．%时，甲均硬度为HV768：To realize repair of the failing aeroengine high-temperature forging mould, the failing mould were repaired by laser cladding technology with self- made alloying powde with different Y2O3 contents .The effect of Y2O3 on microstructure and hardness were investigated with OM. SEM. XRD and hardmeter. The experimental results indicate that excellent chemical metallurgical bonding is obtained between cladding coating and substrate. Without Y2O3 ,The matrix phase in coating is a-Fe, some phases such as Fe2B, Fe3C and FeSi are distributed on the matrix phase . Microstructure of coating is coarse and the average hardness in coating is HV660 .When addition of Y2O3 into coating,a new kind of FeFe2O4 can be obtained and grain is obviously small. The average hardness is HV703, HV743, HV768,respectively when Y2O3 is 1.0 ,2.0,3.0wt.%,respectively.

关 键 词：Y2O3 激光熔覆 模具 组织 硬度 

分 类 号：TG174.4[金属学及工艺—金属表面处理]