CSA-HEC制备块体合金预热粉体温度场分布规律研究

以Ti和C混合粉末的自蔓延燃烧对W-Ti混合粉末进行预热,对混合粉末的热物性参数进行计算,采用有限差分方法对简化的非稳态传热过程及预热效果进行数值模拟,分析材料热物性、燃烧粉末与待预热粉末的质量比等对预热效果的影响。借助于热电偶测量W-Ti混合粉末的温度变化,结果表明:数值计算结果同测量结果吻合良好,用笔者建立的有限差分程序可较好地预测预热结果。

On Temperature Field Distribution Rule of Preheated Powder for Preparing Bulk Alloys by CSA-HEC

The thermophysical parameters of the preheated W-Ti mixed powders,which enjoy self-propagating combustion properties,were worked out.The self-made Finite Variation Method was adopted to simulate digitally the mixed powders' heat conduction process and preheated results by 2D simplify model.The temperature variation of the W-Ti powders was measured by K thermocouple.The results show that the theoretical measurement agrees with the numerical simulation results and the preheating effect can be well forecasted by the Finite Difference Program.