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Alternative TitleEffect of Powder Properties on the Convergence of Powder Stream in Coaxial Laser Cladding
刘昊; 虞钢; 何秀丽; 李少霞
Source Publication中国激光
Other AbstractThe powder stream has an important influence on the quality of coating in coaxial laser cladding. In order to improve the convergence of powder stream, a numerical model of powder stream in coaxial laser cladding is developed based on a given coaxial nozzle. Simulations of three kinds of powder stream, including NiCoCrAlY, ZrO2 ceramic powder and W powder, are calculated and validated by the experimental results. The effect of powder properties, including particle diameter, shape, density and restitution coefficient, on the convergence of powder stream is investigated. According to the calculated results with the same powder feeding parameters, as the particle diameter increases, the powder flow focal distance decreases, and the powder concentration reaches a maximum within some particle diameter scale. The powder concentration gets bigger and the powder flow focal distance becomes shorter with the powder shape factor or powder density increasing. As restitution coefficient decreases, both powder flow distance and powder concentration increase.
Keyword激光技术 激光熔覆 数值模拟 粉末流
Subject Area制造工艺力学
Indexed ByEI ; CSCD
Funding Organization国家自然科学基金重点项目(10832011);面上项目(10972222)资助课题
Citation statistics
Document Type期刊论文
Corresponding Author虞钢
Recommended Citation
GB/T 7714
刘昊,虞钢,何秀丽,等. 粉末性质对同轴送粉激光熔覆中粉末流场的影响规律[J]. 中国激光,2013,40(5):0503008-1-0503008-9.
APA 刘昊,虞钢,何秀丽,&李少霞.(2013).粉末性质对同轴送粉激光熔覆中粉末流场的影响规律.中国激光,40(5),0503008-1-0503008-9.
MLA 刘昊,et al."粉末性质对同轴送粉激光熔覆中粉末流场的影响规律".中国激光 40.5(2013):0503008-1-0503008-9.
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