Fe-Mn-Al-C系奥氏体基低密度钢的研究进展  

Research progress of Fe-Mn-Al-C system austenitic low density steel

作　　者：王凤权 孙挺[2] 王毛球[2] 周晓龙[1] 时捷[2] WANG Feng-quan;SUN Ting;WANG Mao-qiu;ZHOU Xiao-long;SHI Jie(School of Material Science and Engineering,Kunming University of Science and Technology,Kunming 650093,Yunnan,China;Institute of Special Steels,Central Iron and Steel Research Institute,Beijing 100081,China)

机构地区：[1]昆明理工大学材料科学与工程学院,云南昆明650093 [2]钢铁研究总院特殊钢研究所,北京100081

出　　处：《钢铁》2021年第6期89-102,共14页Iron and Steel

基　　金：国家重点研发计划专项资助项目(2016YFB0300100)。

摘　　要：轻量化且高强韧化已成为汽车用钢的主要发展方向。在不同类型的轻质钢中,Fe-Mn-Al-C系奥氏体基低密度钢因具有更高的比强度和良好的塑韧性备受研究者们青睐。从成分体系与力学性能、多种强韧化机制、不同变形机制及工艺调控等方面总结了Fe-Mn-Al-C系奥氏体基低密度钢的研究进展,重点阐述了奥氏体基低密度钢中特有的B2相以及κ-碳化物、MC碳化物等析出相的析出行为对强韧性机制的影响。最后,结合目前国内外学者对Fe-Mn-Al-C系奥氏体基低密度钢的最新研究成果,对奥氏体基低密度钢进行了展望。Lightweight and high strength and toughness have become the main development direction of automotive steels.Among different types of lightweight steels,Fe-Mn-Al-C austenitic-based low-density steels are favored by researchers because of their higher specific strength and good ductility.The research progress of Fe-Mn-Al-C austenitic-based low-density steel is summarized from the aspects of composition system and mechanical properties,various strengthening and toughening mechanisms,different deformation mechanisms and process control.The effect of precipitation behavior of specific B2 phase,κ-carbide and MC carbides in austenitic low density steel on the mechanism of strength and toughness was emphasized.Finally,in combination with austenitic base at home and abroad to the latest research results of low density steel,austenitic base on low density automotive steel is discussed.

关 键 词：奥氏体基 低密度钢 B2相 强韧化机制 力学性能 

分 类 号：TG142.1[一般工业技术—材料科学与工程] U465.11[金属学及工艺—金属材料]