汽车工业的迅猛发展为国民经济和社会发展发挥了重要作用。但受能源短缺、环境污染等问题的影响，该行业发展之矛盾也日益凸显。展望未来，该行业的发展只有建立在自然、生态、节能、安全等背景下，其发展才可持续。
The rapid development of automobile industry has played an important role in national economy and social development. But by the energy shortage, environmental pollution and other issues, the development of the industry has become increasingly prominent contradictions. Looking to the future, the development of the industry only in the context of nature, ecology, energy conservation, security, and its development is sustainable.
在此背景下，汽车轻量化以及高强钢的应用成为了重要发展方向。但受高强钢板材强度的提高，传统的冷冲压工艺在成型过程中容易产生破裂现象，无法满足高强度钢板的加工工艺要求。在无法满足成型条件的情况下，目前国际上逐渐研究超高强度钢板的热冲压成形技术。
In this context, the application of lightweight and high strength steel has become an important development direction. However, with the increase of the strength of high strength steel plate, the traditional cold stamping process is prone to rupture in the forming process, which can not meet the requirements of high strength steel plate processing. At present, the hot stamping technology of ultra high strength steel sheet has been studied in the world.
该技术是综合了成形、传热以及组织相变的一种新工艺，主要是利用高温奥氏体状态下，板料的塑性增加，屈服强度降低的特点，通过模具进行成形的工艺。但是热成型需要对工艺条件、金属相变、CAE分析技术进行深入研究，目前该技术被国外厂商垄断，国内发展缓慢。
This technology is a new forming process, heat transfer and phase transformation, is mainly based on high temperature austenitic state, plastic sheet increased, characteristics of yield strength decrease, the forming process of the mold. However, it is necessary to study the process conditions, metal phase transition and CAE analysis technology, and the technology is monopolized by foreign manufacturers.
据调查统计，部分汽车品牌高强钢的应用不断扩大，有些车型的车身框架高强度钢的应用已达90%。根据美国钢铁学院能量部的研究，即使高强度钢降低部分数值其拉伸还是要比传统的冷板困难得多。高强钢的延展率只有普通钢材的一半。
According to the survey, part of the application of high strength steel car brand continues to expand, some models of body frame high-strength steel applications has reached 90%. According to the Department of energy, the American Institute of steel and steel, it is much more difficult to reduce the tensile strength of a high strength steel than a conventional cold plate. The ductility of high-strength steel is only half of ordinary steel.
当材料被冲压成形时，会变硬，不同的钢材，变硬的程度不同。一般高强度低合金钢只略有20MPa增加，不到10%。注意:双相钢的屈服强度有140MPa增加，增加了40%多！金属在成形过程中，会变得完全不同，完全不像冲压加工开始之前。 这些钢材在受力后，屈服强度增加很多。
When the material is formed by stamping, it will harden, different steel, different degree of hardening. Generally high strength low alloy steel only slightly increased 20MPa, less than 10%. Note: the yield strength of 140MPa steel increases with the increase of more than 40%! In the process of forming, the metal will be completely different. The yield strength of these steels increases with the stress.
材料较高的屈服应力加上加工硬化，等于流动应力的大大增加。因此，开裂、回弹、起皱、工件尺寸、模具磨损、微焊接磨损等成为了高强钢成型过程中的问题焦点。
The higher yield stress of the material plus the work hardening is equal to the increase of the flow stress. Therefore, cracking, springback, wrinkling, workpiece size, die wear, micro welding wear and so on have become the focus of the problem in the process of forming high strength steel.
基于高强钢的特点和特性，如果不能改变金属流动和减少摩擦，那么高强度钢（HSS）的开裂和质地不均性都可能引起部件报废率的上升。这种材料所具有的高千磅力每平方英寸(KSI)（测量屈变力的单位）、增强的回弹、加工硬化的倾向以及在升高的成型温度下运行对于模具来说都是一个挑战。
Based on the characteristics and characteristics of high strength steel, if the metal flow can not be changed and the friction is reduced, the cracking of the high strength steel (HSS) and the uneven nature of the material can lead to the rise of the scrap rate. This material has a high thousand pounds per square inch (KSI) (measurement of yield strength units), tend to rebound, hardening enhanced and running in high temperature for forming mold is a challenge.