热等静压扩散连接反应层元素互扩散的动力学模拟计算

Dynamic Simulations of Element Mutual Diffusion during Hot Isostatic Pressing Diffusion Bonding

通过DICTRA-THERMO—CALC动力学和热力学联合计算软件对DD402单晶和Rene95粉末高温合金进行热等静压扩散连接反应层元素互扩散规律的模拟计算.计算结果表明,此种模拟计算方法可以较好地反应扩散偶中元素的互扩散规律,与实验结果基本吻合.在此基础上,分析计算了温度和时间对扩散连接过程中Al元素互扩散规律的影响.最终得出此种模拟计算方法可以为热等静压扩散连接工艺的制定和优化提供较好的理论依据.

Element mutual diffusions during hot iso-static pressing (HIP) diffusion bonding were simulated using DICRTRA-THERMO-CALC software. The calculating results show that the simulation regulations are agreeable with experimental results. Based on this simulation model, the effect of hold time and temperature on Al mutual diffusion during HIP were calculated, showing that this dynamic computer simulation can offer the processing prediction and the optimum HIP diffusion bonding processing.