7022铝合金FSJ过程温度场特点分析  

Simulation of the Temperature Field for FSJ Process of 7022 Al Alloy

作　　者：潘玲 左敦稳[1] 汪建利[2] 汪洪峰[1,2] 黄铭敏[1] 

机构地区：[1]南京航空航天大学机电学院,江苏南京210016 [2]黄山学院机电与信息工程学院,安徽黄山245041

出　　处：《机械设计与制造工程》2013年第2期69-71,共3页Machine Design and Manufacturing Engineering

基　　金：国家自然科学基金资助项目(51175255);安徽高校省级自然科学研究项目(KJ2012Z388)

摘　　要：建立了FSJ过程的热源模型,并利用有限元方法对7022铝合金FSJ过程中的温度场分布进行模拟,获得了7022铝合金FSJ过程的温度场分布云图。结果表明,连接缝方向各位置处节点的温度变化十分相似,均是当搅拌头行走到该位置的瞬间,热循环温度达到最大值,并随着搅拌头远离而迅速降低。前进侧温度高于后退侧,连接区域各位置节点峰值温度为491℃左右,未达到材料熔点。The heat source model of Friction Stir Joining （FSJ） is established. Also numerical model is estab- lished to simulate the temperature field of 7022 A1 alloy. The results indicate that the time - history curves of all center nodes in the connected area are very similar, all nodes are at the maximum temperature when the tool ar- rived at center nodes, and the node temperature is lower tempestuously when the tool moved away. Advancing side temperature is higher than the retreating side. The maximum temperature of all center nodes in the connect- ed area is about 491℃ at which the material is softened but not molten.

关 键 词：7022铝合金 FSJ 温度场 有限元模拟 热源模型 

分 类 号：TG404[金属学及工艺—焊接]