Cr12MoV激光熔覆温度场的模拟与验证  

Simulation and Verification of Temperature Field on Cr12MoV Laser Cladding

作　　者：张德强[1] 郝延杰 李金华[1] 

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：《热加工工艺》2016年第20期157-160,164,共5页Hot Working Technology

基　　金：国家科技支撑计划项目(2012BAF12B08-5)

摘　　要：为了验证熔池温度场在激光熔覆过程中的变化,利用有限元软件ANSYS建立激光熔覆过程的三维模型,采用移动基模高斯热源对温度场分布进行了动态模拟。分析了激光功率和扫描速度对试样熔覆层宏观形貌、表面硬度及组织的影响。结果表明,熔池呈拖尾状,靠近熔池前方等温线密集,温度梯度大。模型的模拟结果准确、可靠。In order to verify the change of the molten pool temperature field in the laser cladding process, using the finite element software ANSYS, a three-dimensional model for laser cladding process was established. The dynamic simulation for the temperature field distribution was carried out by using fundamental mode gaussian heat source. The influences of laser power and scanning speed on the macro-morphology, surface hardness and mierostructure of the cladding layer were studied. The results show that the molten pool is in drag caudate trailing, the isotherm is intensive and the temperature gradient is large next to the front of the molten pool. The simulation results obtained from the model are accurate and reliable.

关 键 词：激光技术 激光熔覆 温度场模拟 工艺参数 

分 类 号：TG174.4[金属学及工艺—金属表面处理]