刘海涛,王星.真空环境下TC4激光熔丝增材制造工艺实验研究[J].精密成形工程,2023,15(11):100-106.
LIU Hai-tao,WANG Xing.Experimental Study on TC4 Laser Wire-based Additive Manufacturing Process in Vacuum Environment[J].Journal of Netshape Forming Engineering,2023,15(11):100-106. |
| 真空环境下TC4激光熔丝增材制造工艺实验研究 |
| Experimental Study on TC4 Laser Wire-based Additive Manufacturing Process in Vacuum Environment |
| 投稿时间：2023-09-04 |
| DOI：10.3969/j.issn.1674-6457.2023.011.011 |
| 中文关键词: 激光熔丝 增材制造 工艺实验 沉积层形貌 |
| 英文关键词: laser wire-based additive manufacturing process experiment morphology of deposition layer |
| 基金项目:西安市科技计划(21ZCZZHXJS-QCY6-0002) |
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| 中文摘要: |
| 目的 针对TC4金属增材制造制备的零件质量差的问题，研究真空环境下不同工艺参数对TC4激光熔丝增材制造的影响规律。方法 通过单因素单道工艺实验，研究激光功率、扫描速度、送丝比等工艺参数对单道沉积层形貌、宽度和高度的影响。结果 当激光功率小于230 W时，得到的单道表面形貌较为良好，熔覆层与基板区域结合较好，而当激光功率大于230 W时，则会在初始段产生鱼鳞状缺陷。随着激光功率从150 W增大到230 W，单道截面宽度从0.582 mm增大到1.123 mm，增大了93.0%。单道截面高度从0.443 mm降低到0.351 mm，降低了20.8%。当扫描速度小于1.5 mm/s时，单道表面也出现了“鱼鳞”状结构，导致质量下降;当扫描速度从1 mm/s增大到5 mm/s时，单道横截面宽度从1.003 mm降低至0.887 mm，降低了11.6%，而单道横截面高度则从0.332 mm增大至0.353 mm，只增大了6.32%。在不同送丝比情况下，单道表面形貌都较为良好，且随着送丝比从1增大至3，单道沉积层的高度从0.308 mm增大至0.465 mm，增大了51.0%。结论 激光功率是影响单道沉积层表面形貌和横截面宽度的重要因素，而扫描速度对横截面宽度和高度的影响幅度都很小，其影响程度远不如激光功率显著，送丝比只对单道沉积层的高度影响显著。 |
| 英文摘要: |
| In order to solve the problems of poor quality of parts prepared based on TC4 metal additive manufacturing, the work aims to study the effect of different parameters on TC4 laser wire-based additive manufacturing process in vacuum environment. Through single factor and single track process experiment, the effects of process parameters such as laser power, scanning speed, and wire feeding ratio on the morphology, width, and height of the single track deposition layer were studied. When the power was less than 230 W, the surface morphology of the single track obtained was relatively good, and the bonding between the cladding layer and the substrate area was in good condition. If the power was greater than 230 W, fish scale defects occurred in the initial stage. As the laser power increased from 150 W to 230 W, the width of the single track increased from 0.582 mm to 1.123 mm, with an increase of 93.0%. The height of the single track decreased from 0.443 mm to 0.351 mm, with a decrease of 20.8%. When the scanning speed was less than 1.5 mm/s, the surface quality decreased due to the defect of fish scale structure, which resulted in a decrease in surface quality. When the scanning speed increased from 1 mm/s to 5 mm/s, the width of the single track decreased from 1.003 mm to 0.887 mm, only decreasing by 11.6%, while the height of the single track increased from 0.332 mm to 0.353 mm, with an increase of only 6.32%. The surface morphology of the single track under different wire feeding ratios was in good quality without obvious defects, and as the wire feeding ratio increased from 1 to 3, the height of the single track deposition layer increased from 0.308 mm to 0.465 mm, with an obvious increase of 51.0%. Laser power is an important factor affecting the surface morphology and the width of a single track deposition layer, while the scanning speed has a small impact on the width and height, and its impact is far less significant than that of laser power. The wire feeding ratio only has a significant impact on the height of single track deposition layer. |
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