On the 650 degrees C thermostability of 9-12Cr heat resistant steels containing different precipitates
文献类型：期刊论文
| 作者 | Wang, Hai; Yan, Wei; van Zwaag, Sybrand; Shi, Quanqiang; Wang, Wei; Yang, Ke; Shan, Yiyin; Yan, W (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China. |
| 刊名 | PERGAMON-ELSEVIER SCIENCE LTD
 |
| 出版日期 | 2017-08-01 |
| 卷号 | 134页码:143-154 |
| 关键词 | Microstructural Thermostability Precipitate Heat-resistant Steel 9-12cr Steel |
| ISSN号 | 1359-6454 |
| 英文摘要 | The thermal stability of the microstructure, in particular that of the precipitates, has been known to be a critical factor for the creep strength of 9-12Cr martensitic heat-resistant steels. In the present study, four martensitic heat-resistant steels were designed to have different precipitate types and morphologies. Steel NS1 (nitride strengthened, NS) has a low density of fine nitrides and Steel NS2 is strengthened by a high density of fine nitrides. Steel CNS (carbide and nitride strengthened, CNS) contains large size carbides and fine carbonitrides and Steel CS (carbide strengthened, CS) mainly possesses large size carbides. Both aging and creep tests at 650 degrees C were employed to evaluate the stability of the microstructure and properties of the steels during high-temperature exposure as a function of the precipitate morphology. It was found that Steel NS1 and Steel NS2 displayed a good creep performance, but they already recrystallized after a relatively short-term aging treatment. On the other hand, Steel CNS and Steel CS gave poor creep strength, but they could still maintain the tempered martensitic microstructure during long-term aging. The relation between microstructural stability and precipitate morphology/density was linked to the dislocation-precipitate interaction. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.; The thermal stability of the microstructure, in particular that of the precipitates, has been known to be a critical factor for the creep strength of 9-12Cr martensitic heat-resistant steels. In the present study, four martensitic heat-resistant steels were designed to have different precipitate types and morphologies. Steel NS1 (nitride strengthened, NS) has a low density of fine nitrides and Steel NS2 is strengthened by a high density of fine nitrides. Steel CNS (carbide and nitride strengthened, CNS) contains large size carbides and fine carbonitrides and Steel CS (carbide strengthened, CS) mainly possesses large size carbides. Both aging and creep tests at 650 degrees C were employed to evaluate the stability of the microstructure and properties of the steels during high-temperature exposure as a function of the precipitate morphology. It was found that Steel NS1 and Steel NS2 displayed a good creep performance, but they already recrystallized after a relatively short-term aging treatment. On the other hand, Steel CNS and Steel CS gave poor creep strength, but they could still maintain the tempered martensitic microstructure during long-term aging. The relation between microstructural stability and precipitate morphology/density was linked to the dislocation-precipitate interaction. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. |
| 学科主题 | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| 资助机构 | sub topic of Advanced Fission Energy Program-ADS Transmutation System [XDA03010301, XDA03010302]; Chinese Academy of Sciences Strategic Priority Research Program [XDA03010000]; China Scholarship Council |
| 公开日期 | 2018-01-10 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/79169]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Yan, W (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Wang, Hai,Yan, Wei,van Zwaag, Sybrand,et al. On the 650 degrees C thermostability of 9-12Cr heat resistant steels containing different precipitates[J]. PERGAMON-ELSEVIER SCIENCE LTD,2017,134:143-154. |
| APA | Wang, Hai.,Yan, Wei.,van Zwaag, Sybrand.,Shi, Quanqiang.,Wang, Wei.,...&Yan, W .(2017).On the 650 degrees C thermostability of 9-12Cr heat resistant steels containing different precipitates.PERGAMON-ELSEVIER SCIENCE LTD,134,143-154. |
| MLA | Wang, Hai,et al."On the 650 degrees C thermostability of 9-12Cr heat resistant steels containing different precipitates".PERGAMON-ELSEVIER SCIENCE LTD 134(2017):143-154. |
入库方式： OAI收割
来源：金属研究所
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