中文摘要：

汽车轻量化的大背景袭来，热冲压方法已经成为制造汽车零部件的主要方法，并趋于成熟然而，关于汽车零部件B柱的制造目前有着较大的疑问：如何制造出变强度的热冲压件，即上部有着高强度下部有着高韧性的部件。其核心问题是通过对于钢板硬区与软区的不同加热或冷却方式，以及采用不同的材料及后续热处理步骤，获得上部与下部性能不同的钢板本文从加热、冷却、材料拼接与退火处理等4个方面叙述了变强度热冲压技术的主要发展方向，并做出相关评述.

英文摘要：

Car lightweight background is approaching and hot stamping method has become the main method of manufacturing auto parts. However, there is a big question about manufacture of the B-pillars, that is, how to create hot stamping parts of variable strength with the upper part of high strength and the lower part of high toughness. To achieve this, different heating or cooling methods and different materials or subsequent heat treatment steps are adopted. In this paper, the main development directions of variable strength hot stamping technology are described from four aspects： heating, cooling, material splicing and annealing, and some evaluations are made from this.