激光熔覆模压预置层的温度场模拟与参数预测  

Simulation on temperature field of pre-coated layer formed by steel dieing and parameters predicting in laser cladding

作　　者：陈泽民[1] 曾凯[2] 廖丕博[1] 周佳训 

机构地区：[1]昆明理工大学机电工程学院,云南昆明650093 [2]清华大学机械系,北京100084 [3]云南省农垦总局,云南昆明650041

出　　处：《材料热处理学报》2009年第1期188-191,共4页Transactions of Materials and Heat Treatment

摘　　要：在分析了预置式激光表面熔覆边界传热特点的基础之上,建立了简化的三维温度场分析模型,模拟激光熔覆模压预置层时工件的瞬态温度场;同时,在温度场模拟的基础上提出了以界面定点热循环曲线的最高温度达到特定金属的熔点作为判断预置层与基体间形成良好冶金结合的标准,并依据此标准预测了预置式激光表面熔覆时的工艺参数范围。结果表明,模拟预测的工艺参数范围与实际加工的最佳参数较为接近,对预置式激光表面熔覆的工艺参数选择具有指导意义。Based on the analysis of heat transfer in pre-coated layer for laser cladding, a simple three dimensional model was built up to simulate the transient temperature field in workpiece under different parameters. A criterion that is whether the peak of thermal cycle of some special points at interface reaches mehing point of certain element is proposed, and this criterion is used to estimate whether the pre-coated layer is bound to substrate metallurgically and predict the range of processing parameters in laser cladding. The optimal range of processing parameters predicted from simulation is agreement with the results obtained from experiments, which proves that this method of simulation is feasible and can be used to predict processing parameters in pre-coated laser cladding.

关 键 词：激光熔覆 温度场模拟 参数预测 

分 类 号：TG174.44[金属学及工艺—金属表面处理]