杨立宁,金国杰,崔洪斌,杨光

• 1:河北科技大学机械工程学院

摘要(Abstract)：

以GH4169镍基高温合金粉末为材料，基于选区激光熔化技术，研究了激光功率、扫描速度、扫描间距对成形试件拉伸性能的影响。通过正交实验和单因素实验，系统性研究了不同工艺参数组合以及单一参数下试件的抗拉强度的变化趋势，并最终实现了工艺参数的优化。研究结果表明：激光功率、扫描速度对成形试件的抗拉强度影响显著，扫描间距影响次之；随着激光功率增大，扫描速度减小，扫描间距减小，试件抗拉强度值均呈现增大的趋势；当激光功率为190 W、扫描速度为550 mm/s、扫描间距为0.02 mm时，所制备试件的抗拉强度可达1157 MPa，接近锻件水平；但当激光功率高于190 W或扫描速度低于550 mm/s时，易引起金属粉末的过烧、气化甚至飞溅，致使成形试件内部形成明显气孔等缺陷，使得抗拉强度下降。

关键词(KeyWords)： 选区激光熔化;镍基高温合金;工艺参数;拉伸性能

Abstract:

Keywords:

基金项目(Foundation): 河北省重点研发计划项目（21351002D）

作者(Author): 杨立宁,金国杰,崔洪斌,杨光

DOI: 10.19356/j.cnki.1001-3997.20251223.003

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