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.
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)
关键词
汽车用板
烘烤硬化
成形极限
automobile sheet steel
bake hardening
forming limit
