TC21钛合金筒形旋压有限元模拟和工艺优化  

Finite Element Simulation and Process Optimization of TC21 Titanium Alloy Cylindrical Spinning

作　　者：朱慧安 欧阳德来[1] 崔霞[1] 鲁世强[1] ZHU Hui-an;OU YANG De-lai;CUI Xia;LU Shi-qiang(School of Materials Science and Engineering,Nanchang Hangkong University,Nanchang 330063,China)

机构地区：[1]南昌航空大学材料科学与工程学院

出　　处：《南昌航空大学学报（自然科学版）》2019年第3期1-9,共9页Journal of Nanchang Hangkong University(Natural Sciences)

基　　金：国家自然科学基金(51761029,51864035);江西省教育厅科技项目(GJJ160683)

摘　　要：应用有限元分析软件ABAQUS对TC21钛合金筒形热旋压工艺进行有限元数值模拟,分析了钛合金在热旋压过程中的受力及变形特性,探讨了旋压温度、主轴转速、进给速度及减薄率对筒形热旋压成形性能的影响。结果表明,随旋压温度升高,最大等效应力减小,等效应变峰值增大,过高(>890℃)或过低(<860℃)旋压温度均不利于筒形件的外径圆度精度。主轴转速对等效应力应变变化影响不显著,但会影响坯料起皱和外径圆度精度,主轴转速4 r/s时最为适宜。旋压进给速度或减薄率增加,最大应力区域面积和应变峰值增大,进给速度2.5 mm/s和减薄率35%时旋压件隆起缺陷最为严重。从旋压成形质量考虑,TC21钛合金筒形旋压应以旋压温度860℃、进给速度1 mm/s、主轴转速4 r/s及减薄率20%为宜。Finite element analysis software ABAQUS is applied to carry out finite element numerical simulation on TC21 titanium alloy cylindrical hot spinning process.The stress and deformation characteristics of titanium alloy during hot spinning process are analyzed,and the effects of spinning temperature,spindle speed,feed speed and reduction rate on cylindrical hot spinning forming performance are discussed.The results show that with the increase of spinning temperature,the maximum equivalent stress decreases and the peak value of equivalent strain increases.too high(>890℃)or too low(<860℃)spinning temperature is unsuitable to the outer diameter roundness accuracy of cylindrical parts.The spindle speed has no significant effect on the change of equivalent stress and strain,but it will affect the accuracy of blank wrinkling and outer diameter roundness.The spindle speed 4r/s is most suitable.With the increase of spinning feed rate or reduction rate,the area of maximum stress area and strain peak value increase.The bulge defect of spinning parts is the most serious when the feed rate is 2.5 mm/s and the reduction rate is 35%.Considering the spinning quality,it is suitable for TC21 titanium alloy cylindrical spinning to have a spinning temperature of 860℃,a feed speed of 1mm/s,a spindle speed of 4 r/s and a reduction rate of 20%.

关 键 词：钛合金 筒形件旋压 有限元 数值模拟 热旋压 

分 类 号：U458[建筑科学—桥梁与隧道工程]