Ti-6Al-4V薄板临界拉深成形温度研究  

Study on Critical Drawing Forming Temperature of Ti-6Al-4V Sheet

作　　者：邵威 邓沛然[1] 仇健桐 杨瑾 SHAO Wei;DENG Peiran;QIU Jiantong;YANG Jin(School of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, China)

机构地区：[1]上海工程技术大学材料工程学院,上海201620

出　　处：《上海工程技术大学学报》2020年第1期69-75,共7页Journal of Shanghai University of Engineering Science

基　　金：国家自然科学基金资助项目(51805315)。

摘　　要：对高强Ti-6Al-4V薄板成形性能进行研究,通过单轴拉伸试验测得Ti-6Al-4V应力—应变曲线以及延伸率,观察拉伸失效样件断口组织,研究不同技术参数下Ti-6Al-4V板材拉深行为.结果表明在试验条件下,温度在300℃以下时难以成形圆筒件.300℃开始可拉深出合格圆筒件,此时材料抗拉强度为986.69 MPa,延伸率为20.05%.300℃为Ti-6Al-4V薄板在试验条件下拉深成形圆筒件的临界温度,此温度下极限拉深系数为0.656.试验表明高强Ti-6Al-4V板料在一般冲压条件下成形性极差.The formability of high strength Ti-6Al-4V sheet was studied.The stress-strain curve and elongation of Ti-6Al-4V were measured by uniaxial tension test.The fracture structures of failure specimens were observed,and the drawing behaviors of Ti-6Al-4V sheet under different technical parameters were studied.The results show that it is difficult to form a cylindrical part at temperature below 300℃under the test condition.The qualified cylindrical part can be drawn at 300℃and the tensile strength and specific elongation of the material are 986.69 MPa and 20.05%respectively.300℃is the critical drawing forming temperature of Ti-6Al-4V cylindrical part under the experimental conditions and the limit drawing coefficient is 0.656 at this temperature.The test results show that the formability of high strength Ti-6Al-4V sheet is extremely poor in normal stamping condition.

关 键 词：Ti-6Al-4V薄板 拉伸 拉深成形 极限拉深系数 

分 类 号：TG389[金属学及工艺—金属压力加工]