钛铝复合板横向共挤压翘曲变形分析  

Analysis on warping deformation for Ti/Al laminated composite plate in transverse co-extrusion

作　　者：孙凯 薛新 Sun Kai;Xue Xin(School of Mechanical Engineering and Automation,Fuzhou University,Fuzhou 350116,China)

机构地区：[1]福州大学机械工程及自动化学院,福建福州350116

出　　处：《锻压技术》2021年第3期56-63,共8页Forging & Stamping Technology

基　　金：国家自然科学基金资助项目(51705080);福建省自然科学基金面上项目(2018J01764)。

摘　　要：针对双金属横向共挤压成形过程中钛铝复合板的翘曲变形问题,采用Deform-3D数值分析,进行塑性变形分析和成形工艺参数优化,提出了主变形的铝材挤出翘曲角和界面压力焊合的压应力标准差作为翘曲变形的评价策略。数值模拟结果表明:翘曲角与挤压速度、温度分别呈正相关和负相关的演变规律,即"高温低速"的共挤压制备工艺有助于减小钛铝复合板的翘曲变形行为;同时,翘曲角越小,焊合区钛铝复合板的焊合压应力标准差越小。采用优化后相对较优的一组工艺参数(挤压温度为480℃,挤压速度为1 mm·s^(-1)),进行钛铝复合板横向共挤压物理实验,结果表明,翘曲程度与数值模拟结果吻合,验证了数值仿真结果的有效性。For the warping deformation problem of Ti/Al laminated composite plate in transverse co-extrusion process,the plastic deformation analysis and the process parameters optimization were numerically analyzed by software Deform-3D,and the warping angle of deformable aluminum material and the standard deviation of interface welding stress were proposed as the evaluation strategy of warping deformation. The simulation results show that the warping angle has the positive and negative correlation evolvement rules with extrusion speed and temperature respectively,that is,the"high temperature and low speed"co-extrusion preparation process helps to reduce the warping deformation behavior of Ti/Al laminated composite plate. At the same time,the smaller the warping angle is,the smaller the standard deviation of interface welding stress is for Ti/Al laminated composite plate in welding zone. Furthermore,the physical experiment of transverse co-extrusion of Ti/Al laminated composite plate was conducted by a relatively optimized set of process parameters(the extrusion temperature is 480 ℃,the extrusion speed is 1 mm·s^(-1)),and the results show that the experimental warping degree is in a good agreement with the numerical simulation results to verify the validity of the numerical simulation results.

关 键 词：共挤压 钛铝复合板 翘曲角 焊合压应力标准差 翘曲变形 

分 类 号：TG379[金属学及工艺—金属压力加工]