摘要
采用5 kW CO2横流激光器在45钢基体上熔覆MoB/CoCr金属陶瓷,对激光熔覆层的显微结构、元素分布及显微硬度进行分析研究。结果表明:熔覆区的显微结构致密,形态呈现树枝晶—胞状树枝晶—胞状晶的过渡;熔覆区的主要元素为Mo、Cr和Co,合金化区中Fe元素的含量明显增加;熔覆区的最高硬度值达到2 493HV0.2。
Laser cladding of MoB/CoCr cermet on 45 steel substrate was carried out by CO2 laser.Microstructure,energy spectrum and microhardness were studied.The results show that the dense microstucture of cladding zone consists of dendrite crystal,cellular dendrite crystal and cellular crystal from the surface to the bottom of cladding zone.The main elements of cladding zone are Mo,Cr and Co,the content of Fe（element） increases obviously alloying zone.The maximum microhardness of cladding zone is 2 493HV0.2.
出处
《兵器材料科学与工程》
CAS
CSCD
北大核心
2012年第1期18-21,共4页
Ordnance Material Science and Engineering
基金
江西省自然科学基金项目(2010GQC0117)
江西省教育厅科技项目(GJJ11236)
