| 20Cr11MoVNbNB 钢高温蠕变过程中沉淀相的粗化动力学 |
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| 引用本文： | 憨勇,杨君刚,符长璞.20Cr11MoVNbNB 钢高温蠕变过程中沉淀相的粗化动力学[J].航空学报,1998,19(1):126-128. |
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| 作者姓名： | 憨勇 杨君刚 符长璞 |
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| 作者单位： | 1. 西安交通大学材料科学与工程学院, 西安, 710049;2. 西安理工大学材料科学与工程学院, 西安, 710048 |
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| 摘 要： | 对20Cr11MoVNbNB钢550℃、650℃蠕变过程中的沉淀相研究表明：M23C6和MC型碳化物是该钢的主要沉淀相；M23C6和MC的粗化均符合D-t1/4线性规律、受体扩散和位错扩散综合控制；M23C6的粗化速率比MC的大。
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| 关 键 词： | 20Cr11MoVNbNB耐热钢 蠕变 沉淀相 |
| 收稿时间： | 1997-04-22 |
| 修稿时间： | 1997-09-02 |
COARSENING KINETICS OF PRECIPITATES IN 20Cr11MoVNbNB STEEL DURING CREEP |
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| Han Yong,Yang Jungang,Fu Changpu.COARSENING KINETICS OF PRECIPITATES IN 20Cr11MoVNbNB STEEL DURING CREEP[J].Acta Aeronautica et Astronautica Sinica,1998,19(1):126-128. |
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| Authors: | Han Yong Yang Jungang Fu Changpu |
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| Institution: | 1. School of Materials Science and Engineering, Xian Jiaotong University, Xian, 710049;2. School of Materials Science and Engineering, Xian University of Science and Technology,Xian, 710048 |
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| Abstract: | The precipitates in 20Cr11MoVNbNB heat resisting steel quenched at 1130℃ and tempered at 700℃ for 4h, and subsequently creeped at 550℃ for 5462h and 650℃ for 2968h were studied by means of XRD, TEM, etc . It is shown that M 23 C 6 and MC are main precipitates in 20Cr11MoVNbNB steel. The coarsening kinetics of M 23 C 6 and MC have the same 4th power law, synthetically controlled by both block diffusion and dislocation diffusion, and regardless of their original precipitating positions. The coarsening rate of M 23 C 6 is faster than that of MC. |
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| Keywords: | Cr11MoVNbNB heat resisting steel creep precipitates |
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