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| 汽车用烘烤硬化板 BH340 及深冲板 St 15 成形性能分析 |
| Analysis on Forming Properties of Bake-hardening Sheet Steel BH340 and Deep-drawing Sheet Steel St 15 for Automobile |
| Received:March 20, 2013 Revised:April 01, 2013 |
| DOI：10.3969/j.issn.1674-6457.2013.03.002 |
| 中文关键词: 汽车用板 烘烤硬化 成形极限 |
| 英文关键词: automobile sheet steel bake hardening forming limit |
| 基金项目:国家自然科学基金(51175044) |
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| 中文摘要: |
| 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。 |
| 英文摘要: |
| Experiments are carried out to research the mechanical properties, aging characteristics and bake hardenability of bakehardening steel sheet BH340 and deep-drawing steel sheet St15 for automobile, and the forming limit and strain path in the fracture position 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 St15 steel sheet after work-hardening,which makes it appropriate for multi-step forming process.Besides, both steel sheets display obvious anisotropy in plane. |
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