摘要
采用搅拌摩擦焊技术对航空发动机静电传感器的钛合金外壳进行封装。首先建立了焊接过程中的热输入数学模型,将模型应用于焊接过程中整体温度场仿真,并通过试验对有限元模拟结果进行验证。结果表明,随着焊接过程的进行,工件表面温度高的区域逐渐扩大,搅拌头所处位置始终是温度最高的区域,并呈现出前窄后宽的半椭圆形状;工件内部的温度分布可由金相组织结构来分析,金相组织结构变化大的区域为热机影响区,工件瞬间温度升高,并随着热源影响的减小温度逐渐降低,为航空发动机静电传感器的封装提供了指导依据。
The friction stir welding was employed to package titanium alloy shield of electrostatic sensor in aero-engines. The heat input mathematical model in the process was established, then the model is applied to simulate the whole temperature field in the welding process, and is tested and verified by the experiment and the finite element simulation. The results show that during the welding process, high temperature region of the work piece surface expands gradually, and the stirring head position is always the highest temperature in the region. The area shows half ellipse shape of in the front of small of the back width. The temperature, distribution inside the work piece would be analyzed by metallographic structure. The area which metallographic structure changes greatly is heat-affected zone. While the instantaneous temperature of the work piece increases, the heat source effect decreases , then the temperature gradually reduces,which can provide references for the electrostatic sensor packaging in aero-engines.
出处
《热加工工艺》
CSCD
北大核心
2013年第13期159-161,164,共4页
Hot Working Technology
基金
国家自然科学基金资助项目(51105344)
航空科学基金资助项目(2102ZB55003)
河南省科技攻关计划项目(112102210360)
河南省教育厅科学技术研究重点项目(12B460027)
关键词
静电传感器
有限元分析
钛合金
搅拌摩擦焊
数值模拟
electrostatic sensor
finite element analysis
titanium alloy
friction stir weld（FSW）
numerical simulation
