摘要
利用OM、XRD和硬度计研究了Y2O3含量对熔覆层组织结构和硬度的影响。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α-Fe,其上分布着一些非晶相、金属间化合物,如Fe2B、Fe3C、FeSi等,组织粗大,平均硬度为660HV0.2;当添加Y2O3后熔覆层中生成了少量的尖晶石类矿物质如FeFe2O4,晶粒明显细化。当w(Y2O3)=1.0%时,平均硬度为703HV0.2,当w(Y2O3)=2.0%时,平均硬度为768HV0.2,当w(Y2O3)=3.0%时,平均硬度为743HV0.2。
The effects of Y2O3 content on microstructure and hardness of laser cladding coating were investigated with OM, XRD and hardmeter. The results show that excellent chemical metallurgical bonding is obtained between cladding coating and substrate. Without Y2O3, the matrix phase in coating is α-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 660 HV0.2. When addition of Y2O3 into coating, a new kind of FeFe2O4 can be obtained and grains is obviously small. The average hardness is 703 HV0.2, 768 HV0.2, 743 HV 0.2 respectively when Y203 content is 1.0%, 2.0% and 3.0%, respectively.
出处
《热加工工艺》
CSCD
北大核心
2009年第16期86-88,共3页
Hot Working Technology
基金
贵州省科技型中小企业创新基金资助项目(黔科合计字[2006]5027号)
关键词
Y2O3
激光熔覆
组织
硬度
Y2O3
laser cladding
microstructure
hardness
