钛合金平板电子束焊接温度场有限元分析  

Finite element analysis of temperature field in electron beam welding of titanium plate

作　　者：胡美娟[1] 刘金合[1] 王亚军[2] 康文军 

机构地区：[1]西北工业大学材料学院,陕西西安710072 [2]北京航空制造工程研究所,北京100624 [3]西安航空发动机公司,陕西西安710021

出　　处：《电焊机》2005年第7期39-42,共4页Electric Welding Machine

摘　　要：焊接温度场不仅直接通过热应变,而且还间接通过随金属状态和显微组织变化引起的相变、应变决定焊接残余应力,因而对焊接温度场的研究是焊接应力应变分析的前提。在通用的有限元软件ANSYS平台上,根据电子束深熔焊的特点,提出了圆锥形体热源模型,并对电子束焊接温度场进行了数值模拟。有限元数值模拟结果同电子束试验焊缝形状有良好的一致性,圆锥形体热源模型体现了电子束深熔焊所特有的钉形焊缝,能较准确地模拟电子束焊接温度场。Welding residual stress is determined by welding temperature field directly through thermal strain and indirectly through changes of metal phase and microscopic structure.So analysis of welding temperature field is the prerequisite of research on welding stress and strain.Based on ANSYS software,cone body heat source model is proposed according to the characters of electron beam deep welding.Finite element numerical simulation of temperature field is performed and obtains a better result.Results of finite element numerical simulation and trim welding line are well consistent.

关 键 词：电子束焊接 温度场 有限元 体热源 

分 类 号：TG456.3[金属学及工艺—焊接]