为克服现行热冲压制件塑性较差的缺点,研究将淬火-碳分配(Quenching-Partitioning)工艺与热冲压工艺结合的可行性.通过热冲压高强钢B1500HS的全马氏体转变、Q&p 一步法和Q&P两步法的热模拟试验、拉伸试验、显微组织观察等方法,研究了不同Q&P热处理工艺参数对材料性能的影响.结果表明,在合适的工艺参数下,Q&p一步法能获得恰当的马氏体和残留奥氏体组织,在基本保证热冲压制件超高强度的同时有效提高其伸长率,从而提升制件的综合力学性能.试验结果显示,与代表现行热冲压工艺的全马氏体转变相比,Q&p一步法提高强塑积约24％.
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