B1500HS高强钢板热成形极限研究及应用

Research and Application of Hot Forming Limit of B1500HS High Strength Steel Sheel

建立了高强钢板B1500HS等温成形极限有限元模型。采用最大凸模力法结合应变路径转变法的综合集中缩颈失效判据,分别建立了成形温度为650、700、800、900℃时的成形极限曲线。在此基础上,利用ABAQUS有限元模拟软件对高强钢板B1500HS进行了等温Swift拉深试验(冲杯试验)破裂失效的预测,并在相应条件下对试验结果进行了验证。结果表明,高强钢板B1500HS成形极限随温度的增加而增大;并在650、700℃时钢具有最大等温极限拉深比,而在900℃时钢的等温极限拉深比最小。

A finite element model of B 1500HS high strength steel sheet isothermal forming limit was established. Using the failure criterion of the comprehensive centralized necking of the maximum punch force method combined with the strain path transformation method, the forming limit curves at forming temperature of 650, 700, 800 and 900 ℃ were established respectively. On the basis of this, the fracture failure of isothermal Swift drawing testing （deeping drawing cups testing） of B1500HS high strength steel plate was predicted by using the ABAQUS finite element simulation software. And the test results were verified under the corresponding conditions. The results show that, the forming limit of high strength steel sheet B1500HS increases with the increase of temperature; the steel isothermal limit drawing ratio at 650 ℃ and 700 ℃ is the biggest, and isothermal limit drawing ratio at 900 ℃ is the least.