Thermal processes of a powder particle in coaxial laser cladding

✍ Scribed by Chang-Yi Liu; Jehnming Lin

• Publisher: Elsevier Science
• Year: 2003
• Tongue: English
• Weight: 466 KB
• Volume: 35
• Category: Article
• ISSN: 0030-3992
• DOI: 10.1016/s0030-3992(02)00145-7

✦ Synopsis

This paper presents a numerical analysis of the heating, melting and evaporation processes of a single spherical powder particle when irradiated by a CO2 laser beam in coaxial laser cladding. The power particle has a size ranging from 20 to 200 m and the intensity of the laser has been varied from 500 to 3000 W. The laser energy, initial powder velocity and size have been shown to have important e ects on the temperature proÿle of the powder stream. It has also been shown that high powder evaporation due to high power laser radiation may induce signiÿcant loss in the powder particle mass, to as much as 25% of the initial size at certain conditions in the simulation.