| T91耐热钢析出物的热力学计算和平衡相分析 |
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| 引用本文： | 郝珊,李国忠,王福明,李长荣.T91耐热钢析出物的热力学计算和平衡相分析[J].特殊钢,2008,29(3):16-18. |
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| 作者姓名： | 郝珊 李国忠 王福明 李长荣 |
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| 作者单位： | 1北京科技大学冶金与生态工程学院，北京100083 ；
2江阴兴澄特种钢铁有限公司，江阴214429 |
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| 基金项目： | 国家自然科学基金
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高等学校博士学科点专项科研项目 |
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| 摘 要： | 采用Thermo-Calc热力学计算软件,对191耐热钢(%:0.09C、8.57Cr、0.90Mo、0.19V、0.08Nb、0.04N)600～1600℃存在的平衡相M23C6和MX进行了热力学计算。结果表明,T91钢600～1600℃主要平衡析出相为M23C6和MX,M23C6开始析出温度860℃,MX为1200℃。MX相中首先析出富Nb碳氮化物,随后析出富V碳氮化物。随钢中Nb、V、N含量的提高,MX的数量和平衡开始析出温度均有提高,其中N的影响最为显著。
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| 关 键 词： | T91耐热钢 Thermo-Calc软件 M23C6 MX |
| 收稿时间： | 2007-11-09 |
Thermodynamic Calculation and Analysis on Precipitated Phases in Heat-Resistant Steel T91 |
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| Hao Shan,Li Guozhong,Wang Fuming,Li Changrong.Thermodynamic Calculation and Analysis on Precipitated Phases in Heat-Resistant Steel T91[J].Special Steel,2008,29(3):16-18. |
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| Authors: | Hao Shan Li Guozhong Wang Fuming Li Changrong |
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| Affiliation: | 1 School of Metallurgical and Ecological Engineering, University of Science and Technology, Beijing 100083 ；
2Jiangyin Xingcheng Iron and Steel Co Ltd, Jiangyin 214429 |
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| Abstract: | The equilibrium phases M23 C6 and MX existing in heat-resistant steel T91 (0.09C, 8. 57Cr, 0.90Mo, 0.19V, 0. 08Nb, 0.04N) at 600 ~ 1 600 °C have been calculated by Thermo-Calc calculation software. Results show that the main equilibrium precipitated phases in steel T91 at 600 ~ 1 600 ℃ are M23C6 and MX, the initial precipitation temperature for M23 C6 is 860 °C and that for MX is 1 200℃ . In MX phase the rich Nb carbonitrides first precipitate then the rich V carbonitrides precipitate. With increasing Nb, V or N, the amount of MX and its equilibrium initial precipitated temperature increases, in which the effect of N is most obvious. |
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