Numerical analysis on solidification process and heat transfer of FGH95 superalloy droplets during P

• 出 处: Journal of University of Science and Technology Beijing(Engl
• 发表日期: 2003年05期
• 关键词: superalloy solidification PREP nucleation droplet diameters rotating powders ten

In order to understand the relation between microstructure of superalloy powders and its solidification progress, the processing parameters are optimized during plasma rotating electrode processing (PREP). It was predicted from the results that the droplet velocities, droplet temperature, and fractional solidification with flight time about FGH95 superalloy droplet have been carried out based on Newtonian heat transfer formulation coupled with the classical heterogeneous nucleation and the specific solidification process. It has been found that the droplet dynamic and thermal behavior is strongly affected by the distribution of droplet diameters, the proportion of cooling atmosphere, but is relatively unaffected by the droplet superheat.

In order to understand the relation between microstructure of superalloy powders and its solidification progress, the processing parameters are optimized during plasma rotating electrode processing (PREP). It was predicted from the results that the droplet velocities, droplet temperature, and fractional solidification with flight time about has a found that the droplet dynamic and thermal behavior is strongly affected by the distribution of droplet diameters, the proportion of cooling atmosphere, but is is unaffected by the droplet superheat.