| 激光选区熔化Ti6Al4V合金的工艺参数优化 |
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| 引用本文： | 冯恩昊,王小齐,韩潇,周占伟,康楠,王清正,赵春玲,林鑫.激光选区熔化Ti6Al4V合金的工艺参数优化[J].粉末冶金技术,2022,40(6):555-563. |
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| 作者姓名： | 冯恩昊 王小齐 韩潇 周占伟 康楠 王清正 赵春玲 林鑫 |
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| 作者单位： | 1.西北工业大学凝固技术国家重点实验室, 西安 710072 |
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| 基金项目： | 中国航发集团产学研合作项目（HFZL2019CXY019） |
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| 摘 要： | 孔洞、未熔粉、裂纹是在激光选区熔化制备试样过程中常见的缺陷，迄今为止，大量研究均集中在减少缺陷上，关于工艺参数对缺陷影响的研究较少。本文系统研究了工艺参数对激光选区熔化Ti6Al4V合金相对密度、表面粗糙度、力学性能的影响。结果表明，低激光功率、高扫描速度和高层厚将会引起不充分的粉末熔化以及球化效应。最佳工艺参数为激光功率200 W，扫描速度500 mm/s，层厚10 μm，扫描间距105 μm。在该参数下，试样的抗拉强度1077 MPa，屈服强度907 MPa。
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| 关 键 词： | 激光选区熔化 钛合金 工艺参数 表面粗糙度 力学性能 |
| 收稿时间： | 2021-04-11 |
Process parameters optimization of Ti6Al4V fabricated by selective laser melting |
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| Affiliation: | 1.State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China2.MIIT Key Laboratory of High Performance Additive Manufacturing and Innovation Design of Metal Structure, Northwestern Polytechnical University, Xi’an 710072, China3.Beijing Institute of Space Mechanics and Electricity, Beijing 100094, China4.Beijing Satellite Manufacturing Co., Ltd., Beijing 100194, China5.AECC Hunan Aviation Powerplant Research Institute, Zhuzhou 412002, China |
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| Abstract: | The metallurgical defects, such as pores, unmelted powders, and cracks, always appear in the processed components prepared by selective laser melting (SLM). The numerous researches focus on minimizing the inherent defects, but there are few studies on the effect of process parameters on these defects. The influence of process parameters on the relative density, surface roughness, and tensile properties of the selective laser melted Ti6Al4V were studied in this paper. The results show that, the low laser power, high scanning speed, and high layer thickness cause the insufficient melting and the balling effects. In the case of Ti6Al4V, the optimized process parameters are considered as the laser power of 200 W, scanning speed of 500 mm/s, layer thickness 30 μm, and hatch distance of 105 μm, with which the processed sample presents the ultimate tensile strength as 1077 MPa and the yield strength as 907 MPa. |
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