| 基于相变与回弹的热冲压成形冷却过程控制 |
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| 引用本文： | 郭幼丹,吴春笃,程晓农.基于相变与回弹的热冲压成形冷却过程控制[J].塑性工程学报,2011,18(5). |
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| 作者姓名： | 郭幼丹 吴春笃 程晓农 |
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| 作者单位： | 1. 集美大学机械工程学院,厦门,361021
2. 江苏大学,镇江,212013 |
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| 基金项目： | 国家自然科学基金资助项目，国家863重点资助项目，厦门市自然基金资助项目 |
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| 摘 要： | 回弹是影响高强度板热冲压成形精度的主要因素,通过22MnB5硼镁合金板热冲压成形实验,考察了冷却速率对回弹和相变的影响,提出了热冲压成形模具冷却系统设计相关的技术问题。研究表明,只有当冷却速度达到或超过临界冷却速度时,奥氏体才能直接转变为均匀马氏体;在模具结构、冷却系统、冷却介质等因素确定的情况下,可以通过控制冷却系统的水流速度,实现对最佳冷却速度的控制,消除热冲压成形中变形和回弹等缺陷,提高高强度板热冲压成形质量。
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| 关 键 词： | 热成形 相变 回弹 最佳冷却速度 最佳水流速度 |
The cooling process control based on phase changing process and springback during hot stamping forming |
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| GUO You-dan,WU Chun-du,CHENG Xiao-nong.The cooling process control based on phase changing process and springback during hot stamping forming[J].Journal of Plasticity Engineering,2011,18(5). |
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| Authors: | GUO You-dan WU Chun-du CHENG Xiao-nong |
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| Affiliation: | GUO You-dan(College of Mechanical Engineering,Jimei University,Xiamen 361021 China) WU Chun-du CHENG Xiao-nong(Jiangsu University,Zhenjiang 212013 China) |
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| Abstract: | Springback is one of the major problems involved in the hot forming of super-high strength steel sheets.Through hot stamping forming experiment of 22MnB5 steel sheets,the effect of the cooling rate to the springback and phase change was investigated,and the related technical problem for designing the cooling system of the hot forming die was put forward.Research results show that austenitic would change to martensite directly only when cooling rate reaches critical value.When the die structure,the cooling s... |
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| Keywords: | hot forming phase change springback optimum cooling rate optimum current rate |
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