GH4169合金惯性摩擦焊接头温度场显式有限元数值模拟  

Numerical simulation on temperature field of inertia friction welded GH4169 joint by explicit finite element analysis

作　　者：李文亚[1] 陈亮[1] 余敏[1] 

机构地区：[1]西北工业大学陕西省摩擦焊接重点实验室,西安710072

出　　处：《焊接学报》2011年第6期61-64,116,共4页Transactions of The China Welding Institution

基　　金：西北工业大学创新基金资助项目(2007KJ01005);西北工业大学翱翔之星计划资助项目;教育部留学回国人员科研启动基金资助项目(N9YK0003);教育部新世纪优秀人才计划资助项目(NECT-08-0463)

摘　　要：借助ABAQUS/Explicit显式有限元模拟软件,采用热力耦合方法,建立了GH4169高温合金管状工件三维弹塑性有限元大变形计算模型.考虑了计算设置中质量放大因子(mass scaling)对飞轮转动惯量的影响,确定了放大因子与转动惯量缩小倍数之间的相互关系.在此基础上对整个焊接过程工件的温度场进行了综合分析.结果表明,接头焊接界面温度在0.5 s内迅速升高至1 200℃,此后界面中心点温度稳定在准稳态平台温度至飞轮速度明显下降,伴随焊接接头温度场的均匀化,高温粘塑性金属被挤出形成飞边.Based on the explicit finite element software(ABAQUS/Explicit),a three dimensional model of inertia friction welding GH4169 supperalloy ring workpiece was established for the coupled thermo-mechanical analysis.The effect of mass scaling on the moment of inertia was studied.The correlation between the mass scaling and the minification of moment of inertia was preliminarily evaluated.Moreover,the temperature field of the whole welding process was well investigated.The result shows that the temperature of the welding interface center increases rapidly to 1 200 ℃ in the first 0.5 s,after that,the temperature mentains at a quasi-stable platform until the speed of the flywheel descends evidently.The visco-plastic metal is extruded out from the welding interface while the interface temperature tends to be uniform.

关 键 词：惯性摩擦焊 GH4169 显式有限元方法 热力耦合 

分 类 号：TG40[金属学及工艺—焊接]