基于Abaqus的IN718合金激光熔覆温度场与应力场有限元仿真分析  

Finite Element Simulation Analysis of Temperature and Stress Fields of IN718 Laser Cladding Based on Abaqus

作　　者：刘佳溢 高奇[1] 孙盟孟 郑宝泓 王彬 LIU Jia-yi;GAO Qi;SUN Meng-meng;ZHENG Bao-hong;WANG Bin(College of Mechanical Engineering and Automation,Liaoning University of Technology,Jinzhou 121001,China)

机构地区：[1]辽宁工业大学机械工程与自动化学院,辽宁锦州121001

出　　处：《辽宁工业大学学报(自然科学版)》2025年第1期1-6,14,共7页Journal of Liaoning University of Technology(Natural Science Edition)

基　　金：辽宁省自然科学基金(2022-MS-375)。

摘　　要：为了提高IN718合金的使用寿命和机械性能,对其激光熔覆Co基粉末过程中温度场和应力场进行了仿真模拟。分析比较了工艺参数对熔池温度、冷却速率、成形系数和稀释率的影响,优选出了最佳加工工艺参数,并分析了根据最佳工艺参数进行仿真后的残余应力分布。结果表明:激光功率是影响熔池温度、成形系数和稀释率的最显著因素;扫描速度是影响冷却速率的最显著因素;熔覆层中大多呈残余压应力,而熔池中间位置呈拉应力,推测熔池中间处为裂纹高发区。To enhance the service life and mechanical properties of IN718,a simulation of the temperature and stress fields during the laser cladding Co-based powder process is conducted.The effects of process parameters on molten pool temperature,cooling rate,formation coefficient,and dilution rate are analyzed and compared.The optimal processing parameters are selected,and the residual stress distribution is analyzed based on simulations using these optimal processing parameters.The results indicate that laser power is the most significant factor influencing temperature,formation coefficient,and dilution rate,while scanning speed is the most significant factor affecting cooling rate.The cladding layer predominantly exhibits residual compressive stress,whereas the central region of the molten pool shows tensile stress,suggesting that the center of the molten pool is a high-risk area for crack formation.

关 键 词：激光熔覆 IN718合金元素偏析 残余应力 有限元 

分 类 号：TG665[金属学及工艺—金属切削加工及机床]