摘要
利用ANSYS有限元分析软件数值模拟激光熔覆过程,得到了不同工艺参数下的温度场。在与数值模拟相同条件下,在27SiMn钢表面进行激光熔覆304不锈钢实验,利用光学显微镜观察熔覆层的显微组织。结果表明,熔池内峰值温度随着激光功率的增大而增大,随着激光扫描速度的增大而减小;数值模拟与实验所得到的熔池几何尺寸基本一致;当激光功率为2500 W,扫描速度为13 mm/s时,熔覆层的晶粒细小,组织致密,熔覆层成形性最佳。
The ANSYS software was used to perform the numerical simulation of laser cladding. The temperature field was determined under different technological parameters. An experiment involving laser cladding of 304 stainless steel on 27SiMn steel surface was conducted under the same conditions as those in the numerical simulation. The microstructure of the cladding layer was observed using an optical microscope. The results show that the peak temperature in the molten pool increases as the laser power increases, and decreases as the scanning speed increases. The geometrical dimension of the molten pool obtained via numerical simulation is consistent with that obtained in the experiment under the same conditions. Under the laser power of 2500 W and scanning speed of 13 mm/s, the cladding layer has relatively small grains and compact structure, and shows optimal formability.
作者
郭卫
张亚普
柴蓉霞
Guo Wei;Zhang Yapu;Chai Rongxia(College of Mechanical Engineering, Xi' an University of Science and Technology, Xi' an , Shaanxi 710054, China)
出处
《激光与光电子学进展》
CSCD
北大核心
2019年第9期155-161,共7页
Laser & Optoelectronics Progress
基金
国家重点研发计划(2017YFC0804310)
关键词
激光光学
激光熔覆
激光功率
激光扫描速度
温度场
显微组织
laser optics
laser cladding
laser power
laser scanning speed
temperature field: microstructure
作者简介
柴蓉霞,E-mail: joancra_030159@ 163.com.
