李博远,舒林森,陈向东,陈彦龙,王家胜

• 1:陕西理工大学机械工程学院
• 2:陕西省工业自动化重点实验室
• 3:陕西飞机工业有限责任公司

摘要(Abstract)：

为了揭示激光熔覆过程的热量累积特性及规律，利用ANSYS软件对IN718高温合金多道熔覆涂层制备过程热循环进行模拟。通过构建“T”型高斯复合热源并开发ANSYS APDL程序再现激光熔覆过程，获得涂层温度分布及热循环特性。结果表明：熔覆涂层高温区域以半椭球形快速扩散，跟随“弓”字型路径产生热累积；在扫描方向上，各节点最高温度(2309.26℃→2417.15℃→2454.58℃)呈非线性缓慢升高的趋势；以“弓”型路径熔覆会在搭接折弯处显著储能，对已熔涂层造成了重复加热或重熔；在结合界面上，中间道次熔覆时涂层热源生热与热传导具有对称性，使介面温度高于金属粉末材料熔点。采用红外热像测温法对熔覆过程进行监测，监测结果与模拟结果基本吻合，为熔覆工艺优化与涂层微观组织调控提供了理论依据。

关键词(KeyWords)： IN718合金;激光熔覆;热循环;数值模拟;红外热像

Abstract:

Keywords:

基金项目(Foundation): 陕西省重点研发计划(S2022-YF-YBGF-0437);; 陕西省教育厅一般专项科研计划项目(22JK0312)

作者(Author): 李博远,舒林森,陈向东,陈彦龙,王家胜

DOI: 10.13289/j.issn.1009-6264.2023-0340

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