首页|High-Efficiency Dynamic Scanning Strategy for Powder Bed Fusion by Controlling Temperature Field of the Heat-Affected Zone
High-Efficiency Dynamic Scanning Strategy for Powder Bed Fusion by Controlling Temperature Field of the Heat-Affected Zone
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Improvement of fabrication efficiency and part performance was the main challenge for the large-scale powder bed fusion(PBF)process.In this study,a dynamic monitoring and feedback system of powder bed temperature field using an infrared thermal imager has been established and integrated into a four-laser PBF equipment with a working area of 2000 mm × 2000 mm.The heat-affected zone(HAZ)temperature field has been controlled by adjusting the scan-ning speed dynamically.Simultaneously,the relationship among spot size,HAZ temperature,and part performance has been established.The fluctuation of the HAZ temperature in four-laser scanning areas was decreased from 30.85 ℃ to 17.41 ℃.Thus,the consistency of the sintering performance of the produced large component has been improved.Based on the controllable temperature field,a dynamically adjusting strategy for laser spot size was pro-posed,by which the fabrication efficiency was improved up to 65.38％.The current research results were of great significance to the further industrial applications of large-scale PBF equipment.
Powder bed fusionEfficiencyLarge-scaleSpot sizeHeat-affected zone(HAZ)
Xiaokang Huang、Xiaoyong Tian、Qi Zhong、Shunwen He、Cunbao Huo、Yi Cao、Zhiqiang Tong、Dichen Li
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State Key Laboratory of Manufacturing Systems Engineering,Xi'an Jiaotong University,Xian 710049,China
National High Technology Research and Development Program of China 863 Program王宽诚教育基金
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