作　　者： ; ; ; ;

机构地区： 中国石油大学华东机电工程学院

出　　处： 《热加工工艺》 2007年第12期64-68,共5页

摘　　要： 建立了适用于激光熔凝过程的激光宽带热源模型。并应用SYSWELD软件的校正工具,根据具体的激光熔凝工艺和条件对热源进行校正,建立激光熔凝过程的数学物理模型,考虑材料热物理性能参数与温度的非线性关系以及边界初始条件,分析了激光熔凝的温度场。42CrMo板材表面激光熔凝试验表明,宽带热源模型得到的热源形状及“平底锅”状熔凝区截面形貌与实际相符,熔凝区截面尺寸和试验测量值一致,验证了模型的准确性和适用性。使用宽带热源模型可以计算得到符合实际的光斑和熔凝区截面,获得更合理的温度场分布。 A precise broad-band heat source model fitting for laser remelting process was established for the calculation of temperature distribution. According to the laser remelting procedures and conditions,the broad-band heat source model was modified with the tool supplied by SYSWELD software,and the maths-physics model of laser remelting process was established.The relation between temperature dependant and thermo-physical parameters and boundary conditions were considered,then the temperature field of laser remelting for 42CrMo steel was analyzed,The results checked by experiments on 42CrMo plate show that, the simulated laser beam and the cross section with the ＂pan＂shape of the laser remelting area coincide well with reality,and the calculated widths and depths of laser remelting areas are in accordance with the experiment ,the accuracy and suitability of the model was verified.The spot and cross section of the laser remelting area fitting for reality can be calculate using the broad-band heat source model and get reasonable transient-temperature distribution.

关 键 词： 宽带热源模型 激光熔凝 激光光斑 有限元法

领　　域： [自动化与计算机技术] [自动化与计算机技术] [金属学及工艺] [金属学及工艺]