Experimental study on the warm forming and quenching behavior for hot stamping of high-strength aluminum alloys
Experimental study on the warm forming and quenching behavior for hot stamping of high-strength aluminum alloys
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DOI：
10.1088/1742-6596/896/1/012055
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发表时间：
2017-09
期刊：
影响因子：
--
通讯作者：
J. Degner;A. Horn;M. Merklein
中科院分区：
文献类型：
--
作者：
J. Degner;A. Horn;M. Merklein
在过去的几十年里，对燃料消耗、二氧化碳排放和产品可回收性的严格规定迫使汽车行业在车身制造领域实施新的战略。由于其低密度和良好的耐腐蚀性，铝成为最相关的轻量化材料之一。近年来，结构部件用高强度铝合金尤其受到重视。由于这些合金的低成形性限制了它们的应用，因此需要新的工艺策略来提高它们的成形性能。一种很有前途的方法是对铝合金进行热冲压。固溶热处理后的淬火与成形一步到位，使成形性得到显著提高。此外，由于减少了回弹，可以实现更高的制造精度。在此贡献中，将分析成形温度对随后材料行为和淬火过程中传热的影响。因此，对热冲压过程中材料的流动特性和传热系数等力学和热特性进行了研究。
Within the last decades, stringent regulations on fuel consumption, CO2 emissions and product recyclability forced the automotive sector to implement new strategies within the field of car body manufacturing. Due to their low density and good corrosion resistance, aluminum became one of the most relevant lightweight materials. Recently, especially high- strength aluminum alloys for structural components gained importance. Since the low formability of these alloys limits their application, there is a need for novel process strategies in order to enhance the forming behavior. One promising approach is the hot stamping of aluminum alloys. The combination of quenching and forming in one step after solution heat treatment leads to a significant improvement of the formability. Furthermore, higher manufacturing accuracy can be achieved due to reduced spring back. Within this contribution, the influence of forming temperature on the subsequent material behavior and the heat transfer during quenching will be analyzed. Therefore, the mechanical and thermal material characteristics such as flow behavior and heat transfer coefficient during hot stamping are investigated.