| 摘要: |
| 为降低高温合金在SLM成形过程中产生的残余应力，以GH4169合金为研究对象，采用蜂窝分区扫描方法进行了研究，分析了激光功率、扫描速度、蜂窝边长等主要工艺参数对样件残余应力的影响情况。实验结果表明，在一定范围内随着激光功率的增加，残余应力呈线性增加；随着扫描速度的增加残余应力先增加后减小；蜂窝边长存在一个最佳取值范围，过大或过小均会产生较大的残余应力。 |
| 关键词: GH4169合金 激光选区熔化 蜂窝分区 残余应力 |
| 基金项目: |
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| Effect of Honeycomb Scanning Parameters on Residual Stress of Selective Laser Melted GH4169 |
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Liu Quanfu1, Zhao Dongdong2, Song Guohua3, Dai Shuanshi3, Qian Yuanhong3
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1. China Aerospace Institute of Science and Technology;2. Jiyuan Vocational and Technical College;3. Beijing Xinghang Mechanical and Electrical Equipment Co., Ltd.
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| Abstract: |
| In order to reduce the residual stress of high temperature alloy during the process of SLM forming, the GH4169 alloy was studied by honeycomb partition scanning method. The influences of the laser power, scanning speed and honeycomb edge length of the fabricated parts on the residual stress were analyzed. The results show that the residual stress increases linearly with the increase of laser power. The residual stress increases firstly and then decreases as the scanning speed increases. There is an optimal range of values for the length of the honeycomb edge, and either too large or too small will produce greater residual stress. |
| Key words: GH4169 selective laser melting honeycomb partition residual stress |
