稀土氧化物对高硬度堆敷金属中夹杂物及组织的影响  

Effect of rare earth oxide on inclusion and microstructure in high - hardness surfacing

作　　者：王宝森[1] 李午申[2] 冯灵芝[2] 

机构地区：[1]宝钢股份有限公司技术中心,上海201900 [2]天津大学材料科学与工程学院,天津300072

出　　处：《兵器材料科学与工程》2004年第4期33-35,共3页Ordnance Material Science and Engineering

基　　金：天津市自然科学基金项目(013604911)

摘　　要：研究了稀土氧化物对高硬度堆敷金属中夹杂物的影响,结果表明:稀土氧化物能够降低夹杂物的尺寸,增加其弥散度,但对其形状系数没有影响。通过异质核心的作用,能够细化堆敷金属中的一次结晶组织。稀土氧化物可以在保持堆敷金属高硬度的条件下,使堆焊层韧性性能提高了37％。The effect of rare earth oxide in high - hardness surfacing on inclusion is studied in this paper. The result shows that dimension of inclusion can be reduced and its dispersion can be increased, but its shape factor cannot be changed by rare earth oxide. The first crystallized microstructure can be fined though the effect of rare earth oxide on heterogeneity nucle-us. Toughness of surfacing can be improved 37 percent on the condition of keeping its high hardness at the same time by adding rare earth oxide in it.

关 键 词：稀土氧化物 高硬度堆敷金属 弥散度 形状系数 异质核心 

分 类 号：TG423[金属学及工艺—焊接] TG113.25