第三代汽车钢的组织与性能调控技术.pdf

第三代汽车钢的组织与性能调控技术 董 瀚，曹文全，时捷，王存宇，王毛球，翁宇庆 中国钢研科技集团公司 钢铁研究总院 先进钢铁材料技术国家工程研究中心，北京 100081 摘 要：本文介绍了第三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 的进行了回顾总结，在以“多相（Multi-phase ）、亚稳（Meta-stable ）、多尺度（Multi-scale ）” 3 （简称M ）为特征的组织调控理论的指导下，提出了高强塑积第三代汽车钢的超细晶 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。详细介绍了第三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理、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理、第三代汽车钢的工业试制流程 及其服役性能和在汽车的应用技术与前景。本文介绍的研究结果形成了以高强度和高塑 性为特征的高塑积第三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。 关键词: 第三代汽车钢， M3 组织调控，逆转变退火，超细晶组织，高强塑积 On the Microstructure and Performence Control Technology of the 3rd Generation Auto Sheet Steels DONG Han, CAO Wenquan, SHI Jie, WANG Maoqiu, WENG Yuqing National Engineering Research Center of Advanced Steel Technology Central Iron Steel Research Institute, Beijing 100081 Abstract: The fundamental research and industry trials of the 3rd generation automobile steels was introduced in this paper. 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 1 the mechanism of austenite reverted transformation, microstructure evolution of the ultrafine grained ferrite and austenite dualphase structure, mechanical behaviors a