| 激光选区熔化3D打印AlSi10Mg拉伸性能影响因素 |
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| 引用本文： | 王永慧,胡强,张金辉,刘英杰,盛艳伟,赵新明.激光选区熔化3D打印AlSi10Mg拉伸性能影响因素[J].粉末冶金技术,2022,40(2):152-158. |
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| 作者姓名： | 王永慧 胡强 张金辉 刘英杰 盛艳伟 赵新明 |
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| 作者单位： | 1.有研增材技术有限公司, 北京 101407 |
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| 基金项目： | 国家重点研发计划资助项目（2021YFB3701201） |
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| 摘 要： | 利用不同成形工艺、原料粉末和热处理制备激光选区熔化3D打印AlSi10Mg试样并进行拉伸性能研究，讨论了影响激光选区熔化3D打印AlSi10Mg拉伸性能的影响因素，包括3D打印成形工艺、粉末物理性能、热处理制度等。结果表明:激光能量密度通过影响试样相对密度进而对拉伸性能产生影响，能量密度过低时，试样孔洞大多分布在熔池交界处和熔池底部，能量密度过高时，试样孔洞多分布在熔池内部。球形度较高的粉末由于具有良好的物理性能和极低的空心粉率，其成形件拉伸性能较好。退火温度在270～300 ℃时，随着温度的升高，Si相逐渐长大发生粗化，拉伸强度呈递减趋势，断后伸长率逐渐升高。
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| 关 键 词： | 激光选区熔化 3D打印 AlSi10Mg 拉伸性能 |
| 收稿时间： | 2021-12-19 |
Influencing factors on the tensile properties of selective laser melting 3D printing AlSi10Mg |
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| Affiliation: | 1.Grinm Additive Manufacturing Technology Co. Ltd., Beijing 101407, China2.Beijing COMPO Advanced Technology Co. Ltd., Beijing 101407, China |
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| Abstract: | The tensile properties of the selective laser melting (SLM) 3D printing AlSi10Mg samples were investigated which were prepared by the different forming processes, raw powders, and heat treatments. The influencing factors on the tensile properties of SLM 3D printing AlSi10Mg samples were discussed in this paper, including 3D printing forming process, powder physical properties, and heat treatment system. The results show that, the laser energy density affects the relative density of the AlSi10Mg samples, which influences the tensile properties deeply. The holes are mostly distributed at the junction and on the bottom of molten pool when the laser energy density is low, and the over high energy density leads to the distribution of pores inside the molten pool. The AlSi10Mg samples prepared using the powders with high sphericity can achieve the better tensile properties due to the good physical properties and low hollow powder ratio. The Si phase coarsens gradually as the annealing temperature increases from 270 ℃ to 300 ℃, leading to the decrease of strength and the increase of elongation gradually. |
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