锻压技术

基于响应面法的22MnB5高强钢热冲压成形性优化

英文标题：Optimization on hot stamping formability for 22MnB5 high strength steel based on response surface method

分类号：TG142

出版年,卷(期):页码：2020,45(6):93-101

摘要：

通过建立高强钢热冲压成形有限元模型，模拟初始温度为700，750，800和850 ℃下的成形效果。通过分析研究高温下试件达到破裂时的成形极限及成形效果得出最佳成形温度，并通过试验数据验证模拟仿真的可靠性。以U形件为例，研究最佳成形温度下主要工艺参数对成形性能的影响，并优化工艺参数，得出最佳成形工艺参数组合。结果表明：板料的最大成形极限量随温度的升高而增大，在700 ℃时22MnB5高强钢板料成形效果最佳，试件在700 ℃下成形时的最大减薄量为36 mm，成形性好、成形不足面积少。通过响应面分析法得出成形的最佳参数组合，经验证，在优化后的参数组合下，充分成形区域面积增大了23%，起皱倾向区域减少了34%。

The finite element model of hot stamping for high strength steel was established to simulate the forming effects at initial temperatures of 700, 750, 800 and 850 ℃. Then, the optimum forming temperature was obtained by analyzing and studying the forming limit and forming effect of specimen at high temperature, and the reliability of the simulation was verified by the test data. Furthermore, for U-shaped parts, the influences of the main process parameters on the forming properties at the optimum forming temperature were studied, the process parameters were optimized, and the best combination of process parameters was obtained. The results show that the maximum forming limit of sheet method increases with the increasing of temperature, and the forming effect of 22MnB5 high strength steel sheet is best at 700 °C. When the specimen is formed at 700 °C, its maximum thinning amount is 36 mm, the formability is good and the area of insufficient forming is small. Thus, the optimal combination of process parameters is obtained by response surface analysis methodology, and it is verified that under the optimized combination of process parameters, the fully formed area increases by 23% and the wrinkle tendency area decreases by 34%.

基金项目：

国家自然科学基金资助项目（51805045, 51705065）；吉林省科技发展计划项目（20190302100GX）

李奇涵（1970-），男，硕士，教授 E-mail：liqihan@ccut.edu.cn 通讯作者：高嵩（1987-），男，博士，讲师 E-mail：gaosong@ccut.edu.cn

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