| G115马氏体耐热钢平衡析出相的热力学计算和分析 |
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| 引用本文： | 刘心阳,陈正宗,周芸,温鹏宇,包汉生.G115马氏体耐热钢平衡析出相的热力学计算和分析[J].金属热处理,2021,46(11):29-35. |
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| 作者姓名： | 刘心阳 陈正宗 周芸 温鹏宇 包汉生 |
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| 作者单位： | 1.昆明理工大学 材料科学与工程学院, 云南 昆明 650032; 2.钢铁研究总院 特殊钢研究所, 北京 100081; 3.北京科技大学 冶金与生态工程学院, 北京 100083 |
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| 基金项目： | 国家重点研发计划(2017YFB0305202) |
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| 摘 要： | 为了制备超10 t级G115马氏体耐热钢的大型铸件,需科学评估合金元素对析出行为的影响。采用Thermo-Calc软件的TCFe9数据库对G115马氏体耐热钢的平衡析出相进行热力学模拟计算,研究了主元素对G115钢平衡态析出相类型、析出量和析出温度的影响。计算结果表明:G115马氏体耐热钢在650 ℃下的析出相主要有MX相(FCC-A1#2:NbC)、M23C6、Laves相和富Cu相。其中NbC的析出温度为1148 ℃,M23C6的析出温度为871 ℃,Laves相的析出温度为811 ℃,富Cu相的析出温度为734 ℃。其中C和Cr对M23C6的析出有影响,C和Nb对NbC的析出有影响,W对Laves相的析出有影响,B对各相的析出均无明显影响。
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| 关 键 词： | G115马氏体耐热钢 Thermo-Calc计算 析出相 析出温度 |
| 收稿时间： | 2021-06-02 |
Thermodynamic calculation and analysis of equilibrium precipitation phases of G115 martensitic heat-resistant steel |
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| Liu Xinyang,Chen Zhengzong,Zhou Yun,Wen Pengyu,Bao Hansheng.Thermodynamic calculation and analysis of equilibrium precipitation phases of G115 martensitic heat-resistant steel[J].Heat Treatment of Metals,2021,46(11):29-35. |
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| Authors: | Liu Xinyang Chen Zhengzong Zhou Yun Wen Pengyu Bao Hansheng |
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| Affiliation: | 1. Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming Yunnan 650032, China; 2. Institute for Special Steels, China Iron & Steel Research Institute, Beijing 100081, China; 3. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China |
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| Abstract: | For manufacturing large castings of G115 martensitic heat-resistant steel weighing over 10 t, TCFe9 database in Thermo-Calc software was deployed to predict the role of varied solute atoms on precipitation behavior by simulating the equilibrium parameters of varied precipitates, and study the effect of major element in the G115 steel on types, amounts and precipitation temperatures of the equilibrium precipitated phases. The calculated results show that the precipitates of G115 martensitic heat-resistant steel at 650 ℃ mainly consist of MX phase (FCC-A1#2: NbC), M23C6, Laves phase and Cu-rich phase. The precipitation temperature of NbC, M23C6, Laves phase and Cu-rich phase is 1148 ℃, 871 ℃, 811 ℃, and 734 ℃, respectively. Among them, C and Cr strongly affect the precipitation of M23C6, and Nb and C affect that of NbC, W affects that of Laves phase, while B has no obvious influence on precipitation of all the phases. |
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| Keywords: | G115 martensitic heat-resistant steel Thermo-Calc calculation precipitation phase precipitation temperature |
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