摘要
采用5kW横流CO2激光器对1Cr18Ni9Ti核阀密封面进行了Co基合金激光熔覆处理,测定了激光熔覆层的受基体成分稀释的稀释率,并将其微观组织形貌、稀释率与等离子喷焊处理的同种试件进行了对比分析。结果表明,在保证与基体良好冶金结合的条件下,激光熔覆层的稀释率远小于等离子喷焊层,激光熔覆层还具有组织细密、晶粒度高和硬度高的特点。进而分析探讨了对激光熔覆层的稀释率控制。
The sealing surface of nuclear valve with 1Crl8Ni9Ti base metal was clad with Co base alloy powder by using a 5 kW transverse flow CO2 laser. The dilution of laser cladding layer diluted by base metal composition was determined, the microstructure and dilution of laser cladding layer was compared with that of plasma spurt welding layer on the same kind of test piece. The result shows that under conditions of fine metallurgical combining with the base metal the dilution of laser cladding layer is much lower than that of plasma spurt welding layer, and that the laser cladding layer has fine microstructure, high crystal granularity and high hardness. Base on these investigations, the dilution control of laser cladding layer is also analyzed.
出处
《光电子．激光》
EI
CAS
CSCD
北大核心
2003年第2期187-190,共4页
Journal of Optoelectronics·Laser
关键词
激光熔覆
稀释率控制
核阀密封面
等离子喷焊
钴基合金
晶粒度
Metallography
Microstructure
Scanning tunneling microscopy
Sealing (closing)
Testing
Valves (mechanical)
