王荣,沈国斌,魏德强

• 1:桂林电子科技大学机电工程学院

摘要(Abstract)：

根据电子束表面扫描过程的实际情况,建立了铝合金电子束表面扫描处理的温度场有限元模型,分析了电子束处理后表面熔池的形态。仿真过程中,考虑了试样表面的热辐射和材料的相变,并用实验验证了仿真结果,讨论了电子束加速电压、下束时间对熔池尺寸的影响。结果表明:采用电子束表面处理技术,在铝合金材料表面可以获得细小的晶粒组织;在温度场的仿真过程中,模拟得到的熔池的尺寸与实验所测相吻合;仿真得到试样表面温度场分布均匀,试样表面的温度场呈带状分布,横截面处的温度场分布呈梯度分布;熔池的深度和宽度随着电子束加速电压和下束时间的增加而增加。

关键词(KeyWords)： 电子束;表面处理;温度场;熔池;热流密度

Abstract:

Keywords:

基金项目(Foundation): 广西自然科学基金(2010GXNSFA013028,2012GXNSFDA053026)

作者(Author): 王荣,沈国斌,魏德强

DOI: 10.13289/j.issn.1009-6264.2012.11.029

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