工程科学学报，第38卷，第5期：682690,2016年5月 Chinese Journal of Engineering,Vol.38,No.5:682-690,May 2016 DOI:10.13374/j.issn2095-9389.2016.05.013:http://journals.ustb.edu.cn 基于Thermo一Calc的中锰中铝Fe-Mn-Al-C低密度钢 类Schaeffler相图绘制与评估 张明达)，胡春东”，曹文全”，董瀚” 1)钢铁研究总院特殊钢研究所，北京1000812)清华大学材料学院，北京100084 ☒通信作者，E-mail:15901022010@139.com 摘要含铝低密度钢由于其较好的综合力学性能和低密度特征引起结构钢领域研究人员的广泛关注.本文利用Thermo一 Calc热力学计算软件结合TCFE7数据库，计算中锰中铝含量Fe-Mn一A-C钢在不同温度的热力学平衡状态，总结其两相区 相比例的变化规律，通过平移和修正等处理方法，绘制针对中锰中铝钢合金成分和相设计的类Schaeffler相图.结合马氏体转 变温度的计算讨论对应不同合金成分条件下相种类存在可能，并通过已有材料的相比例和相形貌实验结果分析绘制的类 Schaeffler相图的准确性和适用性.绘制的Fe-Mn一AlC类Schaeffler相图可以直观地提供不同合金成分所对应的相比例、相 种类等信息，可用于新型含铝低密度钢的合金设计. 关键词合金钢：低密度：锰：铝：相图 分类号TG142.33 Plotting and evaluation on the Schaeffler diagram of Fe-Mn-Al-C low-density alloys with medium manganese and aluminum contents based on Thermo-Calc software ZHANG Ming-da,HU Chun-dong",CAO Wen-quan,DONG Han) 1)Special Steel Institute,Central Iron and Steel Research Institute,Beijing 100081,China 2)School of Material Science and Engineering,Tsinghua University,Beijing 100084,China Corresponding author,E-mail:15901022010@139.com ABSTRACT Low density steels attract the attention of structural steel researchers due to their good comprehensive mechanical prop- erties and low density characteristic.In this study,the thermodynamic equilibrium states of Fe-Mn-Al-C alloys with medium manga- nese and aluminum contents at different temperatures were calculated by Thermo-Calc software with TCFE 7 date base.The statistical data of phase ratio in the dual phase region were summarized and then processed by translation and correction methods to plot the Schaeffler diagram,which is applicable to design the composition and phase ratio of Fe-Mn-Al-C alloys with medium manganese and aluminum contents.Possible phases in these steels with different compositions were discussed according to the calculation of martensit- ic transformation temperatures.The accuracy and applicability of the Schaeffler diagram were verified by the experimental phase ratio and phase type of several typical Fe-Mn-Al-C alloys.The information of phase ratio and phase type in Fe-Mn-Al-C alloys can be obtained easily from the plotted Schaeffler phase diagram. KEY WORDS alloy steel:low density:manganese:aluminum:phase diagrams 钢铁材料作为工业中用量最大的基础材料之一，正朝着更高强度、更高塑性、较低成本、易加工成型等 收稿日期：201505-27 基金项目：国家自然科学基金资助项目(51371057)工程科学学报，第 38 卷，第 5 期: 682--690，2016 年 5 月 Chinese Journal of Engineering，Vol． 38，No． 5: 682--690，May 2016 DOI: 10． 13374 /j． issn2095--9389． 2016． 05． 013; http: / /journals． ustb． edu． cn 基于 Thermo-- Calc 的中锰中铝 Fe-- Mn--Al--C 低密度钢 类 Schaeffler 相图绘制与评估 张明达1，2) ，胡春东1) ，曹文全1) ，董 瀚1) 1) 钢铁研究总院特殊钢研究所，北京 100081 2) 清华大学材料学院，北京 100084  通信作者，E-mail: 15901022010@ 139． com 摘 要 含铝低密度钢由于其较好的综合力学性能和低密度特征引起结构钢领域研究人员的广泛关注． 本文利用 Thermo-- Calc 热力学计算软件结合 TCFE 7 数据库，计算中锰中铝含量 Fe--Mn--Al--C 钢在不同温度的热力学平衡状态，总结其两相区 相比例的变化规律，通过平移和修正等处理方法，绘制针对中锰中铝钢合金成分和相设计的类 Schaeffler 相图． 结合马氏体转 变温度的计算讨论对应不同合金成分条件下相种类存在可能，并通过已有材料的相比例和相形貌实验结果分析绘制的类 Schaeffler 相图的准确性和适用性． 绘制的 Fe--Mn--Al--C 类 Schaeffler 相图可以直观地提供不同合金成分所对应的相比例、相 种类等信息，可用于新型含铝低密度钢的合金设计． 关键词 合金钢; 低密度; 锰; 铝; 相图 分类号 TG142. 33 Plotting and evaluation on the Schaeffler diagram of Fe--Mn--Al--C low-density alloys with medium manganese and aluminum contents based on Thermo-Calc software ZHANG Ming-da1，2)  ，HU Chun-dong1) ，CAO Wen-quan1) ，DONG Han1) 1) Special Steel Institute，Central Iron and Steel Ｒesearch Institute，Beijing 100081，China 2) School of Material Science and Engineering，Tsinghua University，Beijing 100084，China  Corresponding author，E-mail: 15901022010@ 139． com ABSTＲACT Low density steels attract the attention of structural steel researchers due to their good comprehensive mechanical prop￾erties and low density characteristic． In this study，the thermodynamic equilibrium states of Fe--Mn--Al--C alloys with medium manga￾nese and aluminum contents at different temperatures were calculated by Thermo--Calc software with TCFE 7 date base． The statistical data of phase ratio in the dual phase region were summarized and then processed by translation and correction methods to plot the Schaeffler diagram，which is applicable to design the composition and phase ratio of Fe--Mn--Al--C alloys with medium manganese and aluminum contents． Possible phases in these steels with different compositions were discussed according to the calculation of martensit￾ic transformation temperatures． The accuracy and applicability of the Schaeffler diagram were verified by the experimental phase ratio and phase type of several typical Fe--Mn--Al--C alloys． The information of phase ratio and phase type in Fe--Mn--Al--C alloys can be obtained easily from the plotted Schaeffler phase diagram． KEY WOＲDS alloy steel; low density; manganese; aluminum; phase diagrams 收稿日期: 2015--05--27 基金项目: 国家自然科学基金资助项目( 51371057) 钢铁材料作为工业中用量最大的基础材料之一， 正朝着更高强度、更高塑性、较低成本、易加工成型等