热冲压技术应用现状与发展前景

Present status and prospects of hot stamping press technology

随着汽车轻量化的发展,迫切需要在不降低汽车零部件性能的前提下,开发一些新工艺来减轻零件的重量。钢板热冲压是一种将先进高强度钢板加热到奥氏体温度后快速冲压,在保压阶段通过模具实现淬火并达到所需冷却速度,从而得到组织为马氏体、强度在1 500MPa左右的超高强度零件的新型成形技术。对钢板热冲压新技术的关键装备、核心技术和优缺点以及使用现状等做了系统介绍,并预测了热冲压技术的未来发展趋势。

With the development of weight reduction of automobile it is urgent for the au- tomobile manufacturing works to develop new processes that can reduce the parts weight while keep the performanee of the automobile unchanged. Blank hot forming is a new technology which is realized by heating the advanced high strength steel to austenitie phase, quick stamping, and quenching in die during press holding to meet the required cooling speed. By this new forming technology the phase of the parts can be changed to martensite and the strength of the parts will arrive at about 1 500 MPa. The present pa- per systematically describes the key equipments, key technology, advantage and disad- vantage of blank hot forming and the application status and foresees the trends of devel- opment of the hot stamping technology in the future.