摘要
为探究马氏体时效钢的激光熔覆增材制造性能,选择了18Ni300同种粉末与基材进行仿真分析,研究了不同工艺参数对增材制造过程温度场的影响,进行了试验验证与分析。结果表明:在不同工艺参数下的最大温度曲线趋势相同,为急剧升高,在某一时间保持稳定,激光功率影响更显著;熔覆层随激光移动成型,其前端在激光未达到时有成型趋势,相对于末端温度梯度更大,熔池形状为勺形。扫描方向的温度由慢到快依次达到峰值,且后到达的点的温度大于前点;竖直方向的温度在同一时间全部达到峰值,功率越大,温度梯度越大。仿真与试验得到的熔覆层截面形貌基本一致,结合凝固参数对熔覆层截面气孔形成原因分析,获得了最优试验参数。节省了试验时间和成本,对试验的分析与结果选择有着指导作用。
In order to investigate the manufacturing performance of maraging steel by laser cladding,18Ni300 powders and substrate were selected for simulation analysis,and the influence of different process parameters on the temperature field during the manufacturing process were studied,the experimental results were verified and analyzed.The results show that the maximum temperature curves have the same trend under each process parameter,and the influence of laser power is more significant for the rapid increase and the stability at a certain time.The cladding layer is formed with the laser movement,and the front end is formed when the laser is not reached.Compared with the terminal,the front end has larger temperature gradient,and the shape of the melting pool is spoon-shaped.The temperature in the scanning direction reaches the peak from slow to fast,and the temperature at the later point is greater than the previous point.The temperatures in the vertical direction all reach the peak at the same time.The greater the power,the greater the temperature gradient.The simulation results are in good agreement with the experimental results.Based on the analysis of the formation causes of solidification parameters,the optimal test parameter is obtained.It saves the test time and cost,and has a guiding role in the analysis and selection of the test results.
作者
李卫民
杨泽宇
付松松
刁家宇
LI Weimin;YANG Zeyu;FU Songsong;DIAO Jiayu(School of Mechanical Engineering and Automation,Liaoning University of Technology,Jinzhou 121001,China)
出处
《热加工工艺》
北大核心
2025年第9期130-136,共7页
Hot Working Technology
基金
辽宁省“揭榜挂帅”科技重点专项项目(2022JH1/10800022)。
关键词
马氏体时效钢
激光熔覆
有限元仿真
显微组织
maraging steel
laser cladding
finite element simulation
microstructure
