Fe-Mn-Al-C系低密度钢中κ-碳化物研究进展  

Research progress of κ-carbide in Fe-Mn-Al-C low density steels

作　　者：李昌昊 刘智 章小峰 杨永 周华生 赵鑫磊 Li Changhao;Liu Zhi;Zhang Xiaofeng;Yang Yong;Zhou Huasheng;Zhao Xinlei(School of Metallurgical Engineering,Anhui University of Technology,Ma'anshan Anhui 243002,China)

机构地区：[1]安徽工业大学冶金工程学院,安徽马鞍山243002

出　　处：《金属热处理》2025年第1期22-31,共10页Heat Treatment of Metals

基　　金：安徽省自然科学基金面上项目(2108085ME143);安徽省高校自然科学基金重大项目(KJ2021ZD0045)。

摘　　要：作为新一代汽车用钢,Fe-Mn-Al-C系低密度钢因其强度高、密度低、塑韧性良好等优点,是未来汽车轻量化研究的潜力材料。κ-碳化物会影响钢材的综合力学性能,因此本文详细阐述了Fe-Mn-Al-C系低密度钢中κ-碳化物特征及形成机理、合金元素含量差异对κ-碳化物的影响、固溶时效处理对κ-碳化物的影响以及κ-碳化物对强韧化机制的影响,认为应合理控制Fe-Mn-Al-C钢中Al、Mn的质量分数,为κ-碳化物析出提供驱动力,固溶时间以900~1100℃为宜,之后在450~600℃之间进行时效,时效时间以1~2 h为宜,避免在晶界处析出粗大的κ-碳化物恶化材料性能。As a new generation of automotive steel,the Fe-Mn-Al-C system low-density steel is a potential material for future automotive light-weighting research due to its advantages of high strength,low density,and good plasticity and toughness.As a result of κ-carbide affect the comprehensive mechanical properties of the steel,the characteristics and formation mechanism of κ-carbides in Fe-Mn-Al-C low-density steels and the effect of differences in the content of alloying elements on κ-carbides were expounded,and the effect of solution and aging treatments on κ-carbides and the effect of κ-carbides on the toughening mechanism were described in detail.It is concluded that the mass fraction of Al and Mn in Fe-Mn-Al-C steel should be reasonably controlled to provide driving force for κ-carbide precipitation,and the solution treatment temperature should be 900-1100 ℃,after which the aging should be carried out in the range of 450-600 ℃,and the aging time should be 1-2 h,to avoid the precipitation of coarse κ-carbides at the grain boundaries to deteriorate the material properties.

关 键 词：Fe-Mn-Al-C低密度钢 κ-碳化物 合金元素 热处理 

分 类 号：TG142.1[一般工业技术—材料科学与工程]