【摘要】 为了解决高强铝合金板料冷成形时塑性差、容易出现破裂及回弹大、影响尺寸精度的问题,发展起来了一种高强铝合金固溶–热冲压–淬火–时效一体化新工艺。该工艺将热成形与热处理有机地结合在一起,将固溶后的热板料快速转移到模具中成形,并立即完成模内淬火,最后通过时效处理来提高其强度。首先总结了高强铝合金热冲压成形技术的最新研究进展,重点介绍了铝合金热冲压成形工艺试验方面的研究成果,详细说明了铝合金热成形时影响成形性能的因素和实现固溶时效强化的工艺方法,最后从摩擦机理和界面传热的角度总结了铝合金热冲压模具技术方面的研究进展。更多还原

【Abstract】 In order to solve the problems of cracking caused by poor plasticity and large spring-back affecting dimensional precision during cold stamping of high aluminum alloy sheet, a novel technology named hot forming and quenching integrated process has been developed. The technology combined hot forming and quenching together in one operation where the sheet is rapidly transferred to the forming die after solution treatment and then in-die quenching is performed and the strength is finally improved by aging treatment. In this paper, firstly latest developments in hot stamping process for aluminum alloy sheet are summarized, and then some research achievements of hot stamping process experiments are introduced, which formability of hot stamping and solid solution aging strengthening are described in details. At last some progresses about the hot stamping die technology are presented from the view of the friction mechanism and interfacial heat transfer.更多还原