汽车用烘烤硬化板BH340及深冲板St15成形性能分析  

Analysis on Forming Properties of Bake-hardening Sheet Steel BH340 and Deep-drawing Sheet Steel Stl5 for Automobile

作　　者：佘彩凤[1] 鄂大辛[1] 林芳[2] 

机构地区：[1]北京理工大学材料学院,北京100081 [2]上海汽车集团股份有限公司技术中心,上海201804

出　　处：《精密成形工程》2013年第3期6-9,18,共5页Journal of Netshape Forming Engineering

基　　金：国家自然科学基金(51175044)

摘　　要：进行了汽车用烘烤硬化钢板BH340及深冲钢板St15的力学性能、时效特性和烘烤硬化性能实验,并利用有限元方法模拟了2种钢板的成形极限和破裂点应变路径。分析后指出,BH340烘烤硬化效应较显著,时效效应不明显,对于汽车外覆盖件成形、涂漆烘烤工艺具有较好的适应性;St15经形变强化后仍具有良好的塑性,适用于多道次成形工艺。另外,2种钢板均具有较为明显的面内异向性。Experiments are carried out to research the mechanical properties, aging characteristics and bake hardenability of bake- hardening steel sheet BH340 and deep-drawing steel sheet Stl5 for automobile, and the forming limit and strain path in the fracture po- sition of both sheets are simulated by finite element method. It was revealed that a remarkable bake-hardenability and invisible aging effect can be expected for BTH340 steel sheet, which makes it adaptable for automobile panel forming and paint baking process; while a good plasticity can be expected for Stl5 steel sheet after work-hardening,which makes it appropriate for multi-step forming process. Besides, both steel sheets display＂ obvious anisotropy in plane.

关 键 词：汽车用板 烘烤硬化 成形极限 

分 类 号：TG386[金属学及工艺—金属压力加工]