超高强度防撞梁热冲压成形工艺优化
发布时间：2019-07-24 06:10
【摘要】：对超高强度防撞梁的热冲压成形过程进行了模拟分析,揭示了热成形过程不同阶段板料温度、厚度、微观组织和性能的变化规律,以及初始成形温度、冲压速度和压边力等工艺参数对超高强钢热成形的影响规律,优化了防撞梁热成形工艺参数,并通过试验进行了验证。结果表明:热冲压成形过程中,板料厚度变化主要发生在高速冲压阶段,微观组织及性能变化主要发生在淬火阶段,热冲压成形件卸载后的回弹量很小;初始成形温度对板料厚度变化影响显著,初始成形温度较低时板料成形性较差;冲压速度过大或过小均易导致板料减薄严重;添加压料板会大幅降低板料流动性,易导致拉裂;对本文构件而言,最佳工艺参数是:初始成形温度为800℃、冲压速度为100mm/s,不设置压料板。
[Abstract]:The hot stamping forming process of ultra-high strength anti-collision beam is simulated and analyzed, and the changes of sheet metal temperature, thickness, microstructure and properties in different stages of hot forming process are revealed, as well as the effects of initial forming temperature, stamping speed and blank holder force on the hot forming of ultra-high strength steel. The hot forming process parameters of anti-collision beam are optimized and verified by experiments. The results show that in the process of hot stamping, the change of sheet metal thickness mainly occurs in the stage of high speed stamping, the change of microstructure and properties mainly occurs in the quenching stage, and the springback of hot stamping forming parts after unloading is very small. The initial forming temperature has a significant effect on the change of sheet metal thickness, and the sheet metal formability is poor when the initial forming temperature is low. Too large or too small stamping speed can easily lead to serious sheet metal thinning. The addition of pressing plate will greatly reduce the sheet metal flow and easily lead to tensile crack. For the components in this paper, the optimum process parameters are as follows: the initial forming temperature is 800 鈩，
本文编号：2518433
[Abstract]:The hot stamping forming process of ultra-high strength anti-collision beam is simulated and analyzed, and the changes of sheet metal temperature, thickness, microstructure and properties in different stages of hot forming process are revealed, as well as the effects of initial forming temperature, stamping speed and blank holder force on the hot forming of ultra-high strength steel. The hot forming process parameters of anti-collision beam are optimized and verified by experiments. The results show that in the process of hot stamping, the change of sheet metal thickness mainly occurs in the stage of high speed stamping, the change of microstructure and properties mainly occurs in the quenching stage, and the springback of hot stamping forming parts after unloading is very small. The initial forming temperature has a significant effect on the change of sheet metal thickness, and the sheet metal formability is poor when the initial forming temperature is low. Too large or too small stamping speed can easily lead to serious sheet metal thinning. The addition of pressing plate will greatly reduce the sheet metal flow and easily lead to tensile crack. For the components in this paper, the optimum process parameters are as follows: the initial forming temperature is 800 鈩，
本文编号：2518433
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