航空科学技术2025，Vol.36Issue(12)：59-66,8.DOI:10.19452/j.issn1007-5453.2025.12.008
基于在线监测的激光金属沉积316 L不锈钢熔池温度场仿真研究
Study on Melt Pool Temperature Field in Laser Melting Deposition of 316 L Stainless Steel Based on Online Monitoring
摘要
Abstract
Laser metal deposition(LMD),as an important development direction in laser additive manufacturing technology,has been widely applied in the aerospace field.In the LMD process,the simulation and monitoring of the melt pool temperature play a crucial role in the analysis of metal forming quality.By precisely controlling the melt pool temperature,the forming accuracy and material properties of aerospace components can be effectively improved,thus meeting the aerospace industry's demand for high-strength,lightweight,and high-performance components.This paper focuses on 316 L stainless steel,combining simulation and experimental methods to investigate the melt pool temperature field during laser metal deposition of 316 L stainless steel.A three-dimensional finite element model of the 316 L stainless steel bulk structure in the LMD process was established using finite element simulation methods.The thermal behavior of 316 L stainless steel during the laser metal melting deposition process under different processing parameters(such as laser power,scanning speed,etc.)was revealed.The simulation results show that during the bulk printing process,the temperature of the first layer printed is usually higher than that of the other cladding layers.In the LMD process,a"comet-shaped"tail appears at the end of the melt pool,indicating a significant temperature gradient at the front of the melt pool.Using self-developed LMD equipment and an optical pyrometer for online melt pool temperature measurement,the measured melt pool temperature at a laser power of 1400 W and a scanning speed of 330 mm/min was compared with the simulation results,which showed good agreement.Finally,due to the different heat dissipation conditions between the simulation bulk printing and the experimental single-arm wall printing,the melt pool caused lateral differences in the microstructure of the formed part.Metallographic results confirmed that the growth direction tilted towards the air rather than growing vertically upwards along the substrate.This study provides a reference for the investigation of the melt pool temperature during the laser metal deposition process of 316 L stainless steel.关键词
激光金属沉积/熔池温度/数值模拟/有限元仿真/在线监测Key words
laser melting deposition/molt pool temperature/numerical simulation/finite element simulation/online monitoring分类
机械制造引用本文复制引用
宋鹏,何昱煜,王飞,岳洪浩,刘俊岩..基于在线监测的激光金属沉积316 L不锈钢熔池温度场仿真研究[J].航空科学技术,2025,36(12):59-66,8.基金项目
航空科学基金(2022Z008077003) Aeronautical Science Foundation of China(2022Z008077003) （2022Z008077003）
