Diffusion-based Analytical modeling of brazing stainless steel with Bni-2
Brazed structures made of stainless steels with nickel-based filler alloys have been increasing used in modern manufacturing. Quality brazed joints generally are sensitive to the brazing processes, especially to those during the dwelling time at the brazing temperature and need more attention. It is necessary to theoretically understand the diffusion-based brazing procedure instead of experiential evaluation. An analytical modeling approach coupled with experimental data was used to solve a diffusion-controlled migrating boundary liquid/solid interface problem for brazing SS304/Bni-2/SS304 joint based on the diffusion theory. Three full-implicit finite differential equations for accurately tracking the motion of solid/liquid interface were presented in this paper. The diffusion coefficient, used in the analytical modeling, of solute into the base metal during brazing was mathematically determined together with experimental data from brazing the wedge shape joint of SS304/Bni-2/SS304. Three aspects of results were offered from the modeling: the solute concentration profile, the maximum half-liquid thickness and the time to complete isothermal solidification. Their effects on the brazing process were also investigated.
brazing diffusion liquid/solid interface diffusivity isothermal solidification Bni-2 SS304
Hu CHEN Jian-ming GONG Shan-tung TU Wen-chun JIANG
College of Mechanical and Power Engineering, Nanjing University of Technology, China
国际会议
郑州
英文
2007-10-23（万方平台首次上网日期，不代表论文的发表时间）