材料期刊网

介绍了第3代汽车钢的基础研究与工业试制工作。对国内外高性能汽车钢进行了回顾总结，在以“多相（Multiphase）、亚稳（Metastable）、多尺度（Multiscale）”（简称M3）为特征的组织调控理论的指导下，提出了高强塑积第3代汽车钢的超细晶基体与亚稳相的组织调控思路，采用了新型中锰合金化和逆转变奥氏体(Austenite Reverted Transformation, ART)退火的技术思路。详细介绍了第3代汽车钢的基础研究进展及工业试制结果，内容包括奥氏体逆转变退火机制，超细铁素体与亚稳奥氏体的双相形成规律，高强塑积汽车钢的力学行为及其强塑化机制，第3代汽车钢的工业试制流程及其服役性能和在汽车上应用技术与前景。本研究结果形成了以高强度和高塑性为特征的高塑积第3代汽车钢的原型钢技术，为汽车轻量化与碰撞安全性能的提高奠定了材料技术基础。

The fundamental research and industry trials of the 3rd generation automobile steels was introduced. Motivitated by the theory of microstructure control characterized by Multiphase, Metastable and Multiscale(called M3 simply), summary and review of the home and abroad automobile steels were carried out, which led to the idea microstructure controlling characterized by ultrafine grained matrix and metastable austenite phase and the approaches of medium manganese alloying and austenite reverted transformation annealing for the research and development of the 3rd generation automobile steel. The fundamental research and industry trials were introduced in details, which included the mechanism of austenite reverted transformation, microstructure evolution of the ultrafine grained ferrite and austenite dualphase structure, mechanical behaviors and ductilityenhancing mechanism, industry trial process, service performance and application technologies and prospects of the 3rd generation steels. It was concluded that this study forms the prototype technologies of the third generation automotive sheet steel, which provides the theorical and technological basement for the weightlightening and safetyimprovement of the automotive steels in materials aspect.