练国富,曹强,郑颖,冯美艳

• 1:福建工程学院机械与汽车工程学院

摘要(Abstract)：

针对曲面基体激光熔覆多道搭接成形质量及粉末有效利用率问题，采用响应面中心复合设计方法，构建工艺参数与响应输出之间的数学模型，分析工艺参数与多道搭接激光熔覆层平整度、稀释率和粉末利用率之间的影响关系，以获得多道搭接激光熔覆的最佳工艺参数。结果表明：平整度随着激光功率和气流量的增加而减小，随着扫描速度和搭接率的增加而增大；稀释率随着激光功率的增加而增大，随着扫描速度的增加先减小后增大，随着搭接率的增加而减小；粉末利用率随着激光功率的增加而增大，随着扫描速度和搭接率的增加而减小。以平整度大于0.75、稀释率为10%、粉末利用率最大为目标，并基于数学模型对工艺参数进行优化与预测，得到最佳工艺参数为激光功率为1.800 kW、扫描速度为7.000 mm/s、气流量为10.000 NL/min、搭接率为22.744%。以最佳工艺参数制备的熔覆层的平整度、稀释率和粉末利用率与模型预测结果的误差分别为4.645%、3.332%和6.140%,证明了模型多目标优化的准确性。

关键词(KeyWords)： 激光熔覆;响应面;曲面基体;多道搭接;工艺参数

Abstract:

Keywords:

基金项目(Foundation): 福建省2021年省级科技创新重点项目(2021G02009)

作者(Author): 练国富,曹强,郑颖,冯美艳

DOI: 10.13289/j.issn.1009-6264.2022-0356

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