摘要
为研究TC4钛合金点阵/4层混合结构舵翼件的超塑成形/扩散连接工艺,采用ABAQUS有限元软件分析了舵翼件在超塑成形过程中的等效应变以及不同区域的壁厚变化,并进行了带预制块的TC4钛合金空心结构舵翼件超塑成形/扩散连接实验以及无损检测、壁厚分析和金相分析。结果表明,在920℃下以3.0 MPa胀形压力成形的零件表面质量良好,无沟槽缺陷;在920℃/2 MPa/120 min扩散焊接条件下,扩散连接界面质量良好,焊合率为95%;点阵结构各筋条完全成形,最小壁厚为0.69 mm,减薄率为13.8%;4层结构区域凸包贴模成形,预制块工艺补充面圆角处的壁厚最小,厚度为0.52 mm,减薄率为35%。
To study the superplastic forming/diffusion bonding(SPF/DB)process of TC4 titanium alloy rudder wing with lattice/four-sheet structure,the equivalent strain and wall thickness evolution at different areas of rudder wing during SPF were analyzed by ABAQUS finite element software.The SPF/DB experiment,the non-destructive inspection,wall thickness analysis and metallographic analysis of TC4 titanium alloy hollow structure rudder wing with preset structure were conducted.The results show that the parts formed under the bulging pressure of 3.0 MPa at 920℃has good surface quality with no groove defect.The parts formed under the condition of 920℃/2 MPa/120 min shows intimate diffusion bonding interface with the welding rate of 95%.Each bar of lattice structure is fully formed,the minimum wall thickness is 0.69 mm,and the thinning rate is 13.8%.The grid at four-sheet structure area is expanded and formed.The wall thickness at the filling corner of preset structure is the minimum,which is 0.52 mm,and the thinning rate is 35%.
作者
吴迪鹏
武永
周贤军
汤国伟
陈明和
WU Di-peng;WU Yong;ZHOU Xian-jun;TANG Guo-wei;CHEN Ming-he(College of Mechanical&Electrical Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)
出处
《塑性工程学报》
CAS
CSCD
北大核心
2022年第5期92-97,共6页
Journal of Plasticity Engineering
基金
国家自然科学基金资助项目(51805256)。
