Effects of Stabilization Heat Treatment on Microstructure and Mechanical Properties of Si-Bearing 15Cr-9Ni-Nb Austenitic Stainless Steel Weld Metal
文献类型：期刊论文
| 作者 | Chen, Yakui2,3; Wu, Dong3; Li, Dianzhong3; Li, Yiyi1,3; Lu, Shanping1,3 |
| 刊名 | ACTA METALLURGICA SINICA-ENGLISH LETTERS
 |
| 出版日期 | 2022-12-08 |
| 页码 | 13 |
| ISSN号 | 1006-7191 |
| 关键词 | Austenitic stainless steel Weld metal Stabilization heat treatment Martensite NbC delta -> gamma transition |
| DOI | 10.1007/s40195-022-01497-1 |
| 通讯作者 | Lu, Shanping(shplu@imr.ac.cn) |
| 英文摘要 | Two 15Cr-9Ni-Nb austenitic stainless steel weld metals with 2.5% Si and 3.5% Si (namely 2.5Si and 3.5Si samples, respectively) were designed and prepared through tungsten inert gas (TIG) welding and then hold at 800 degrees C or 900 degrees C for 3 h for stabilization. The microstructure and mechanical properties were investigated both for the as-welded and after-stabilization heat treatment (SHT) weld metals. There are 3.0-4.0% martensite and 2.5-3.5% delta ferrite in the 2.5Si as-welded weld metal and 6.0-7.0% delta ferrite in the 3.5Si as-welded weld metal. After SHT, a large amount of martensite formed in the 2.5Si weld metal, and delta -> gamma transition occurred during the SHT process both for the 2.5Si and 3.5Si weld metals. There were a large amount of coarse NbC and few nanoscale NbC in the as-welded weld metal. During the SHT, a large amount of nanoscale NbC formed in the matrix, while a large number of G phases formed at the austenite grain boundaries and the delta/gamma interfaces. The decrease in solid solution C and delta ferrite content led to the decline of the yield strength of the weld metal after SHT. The martensite formed in 2.5Si weld metal after SHT had less effect on strength because of its low carbon content. The G phases formed during the SHT reduced the impact energy of the weld metal because it promoted the intergranular fracture, while the delta -> gamma transition reduced the amount of the delta/gamma interfaces and avoided the intergranular fracture, which was beneficial for the impact toughness of the weld metals. |
| 资助项目 | China Institute of Atomic Energy[E141L803J1] ; innovation project of Shenyang National Laboratory for Materials Science[SYNL-2022] |
| WOS研究方向 | Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| 出版者 | CHINESE ACAD SCIENCES, INST METAL RESEARCH |
| WOS记录号 | WOS:000895640400001 |
| 资助机构 | China Institute of Atomic Energy ; innovation project of Shenyang National Laboratory for Materials Science |
| 源URL | [http://ir.imr.ac.cn/handle/321006/175640]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Lu, Shanping |
| 作者单位 | 1.Chinese Acad Sci, Inst Met Res, CAS Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Yakui,Wu, Dong,Li, Dianzhong,et al. Effects of Stabilization Heat Treatment on Microstructure and Mechanical Properties of Si-Bearing 15Cr-9Ni-Nb Austenitic Stainless Steel Weld Metal[J]. ACTA METALLURGICA SINICA-ENGLISH LETTERS,2022:13. |
| APA | Chen, Yakui,Wu, Dong,Li, Dianzhong,Li, Yiyi,&Lu, Shanping.(2022).Effects of Stabilization Heat Treatment on Microstructure and Mechanical Properties of Si-Bearing 15Cr-9Ni-Nb Austenitic Stainless Steel Weld Metal.ACTA METALLURGICA SINICA-ENGLISH LETTERS,13. |
| MLA | Chen, Yakui,et al."Effects of Stabilization Heat Treatment on Microstructure and Mechanical Properties of Si-Bearing 15Cr-9Ni-Nb Austenitic Stainless Steel Weld Metal".ACTA METALLURGICA SINICA-ENGLISH LETTERS (2022):13. |
入库方式： OAI收割
来源：金属研究所
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