预胀对筒形件充液拉深变形和硬化的影响  

Influence of pre-bulging on deformation and hardness of dual-phase steel cylindrical cup by hydrodynamic deep drawing process

作　　者：陈保国[1] 徐永超[1] 

机构地区：[1]哈尔滨工业大学材料科学与工程学院,哈尔滨150001

出　　处：《材料科学与工艺》2011年第1期17-20,共4页Materials Science and Technology

基　　金：国家自然科学基金资助项目(50875062)

摘　　要：为定量分析预胀对塑性成形的影响,以变形量差异较大的平底筒形件为研究对象,采用实验和数值模拟方法研究了预胀高度对双相钢DP340/590板材充液拉深的影响,分析了预胀对试件等效应变、壁厚减薄率和硬度分布的影响.研究表明,预胀显著增加平底筒形件底部的变形,即试件底部壁厚减薄率增加、硬度升高、等效应变增大.与普通充液拉深相比,相对预胀高度为20%时,试件等效应变差减小16.7%,底部维氏硬度值提高23.8%.To quantitatively analyze the influence of pre-bulging on deformation,taking the dual-phase steel cylindrical cup with flat bottom as example,the experiments and simulation of the hydrodynamic deep drawing process with and without pre-bulging were carried out,and the equivalent effective strain distributions,wall thickness distributions and hardness distribution were discussed in details.The results indicate that the pre-bulging increases the thickness thinning,hardness and equivalent effective strain of the bottom.Compared with hydrodynamic deep drawing,when the relative pre-bulging height is 20%,the difference of equivalent strain decreases 16.7%,and the hardness of the bottom increases 23.8%.

关 键 词：充液拉深 预胀 双相钢 筒形件 硬化 

分 类 号：TG394[金属学及工艺—金属压力加工]