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Laser additive manufacturing and post-heat treatment on microstructure and mechanical properties of 9Cr steel

文献类型：期刊论文

作者Feng, Junyi2,5; Zhang, Peilei2,5,6; Jia, Zhiyuan2,5; Yu, Zhishui2,5; Fang, Chao1; Yan, Hua2,5; Shi, Haichuan2,5; Tian, Yingtao3; Xie, Fan4
刊名INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING
出版日期2022-08-01
卷号198
ISSN号0308-0161
关键词Laser melting deposition (LMD) 9Cr steel Different powder size Post-heat treatment Mechanical properties Microstructure
DOI10.1016/j.ijpvp.2022.104681
通讯作者Zhang, Peilei(peilei@sues.edu.cn) ; Yu, Zhishui(yu_zhishui@163.com) ; Fang, Chao(fangchao@ipp.ac.ch)
英文摘要9Cr steel is a material that has been widely used in pressure vessel parts in thermal power plants and nuclear power plants, and has good high-temperature creep properties. Laser Melting Deposition (LMD) is a promising method for preparing complex 9Cr steel components. It provides a rare opportunity to improve existing designs and produce fine features and complex geometries with higher efficiency. The LMD-9Cr steel sample has high density, the maximum tensile strength of the sample is 1057.75 MPa, which is much higher than the standard cast 9Cr steel of 650 MPa. We use 760 degrees C tempering heat treatment, after heat treatment, the average grain size of the material is reduced, the Charpy impact performance is improved, and the tensile strength and micro-hardness are slightly reduced. Although the tempering heat treatment greatly reduces the average grain size of the sample by 35.59%, but at the same time the tempering heat treatment greatly reduces the high dislocation density of lath martensite, and the supersaturation behavior of Cr, W and C elements weakens the effect of solid solution strengthening. In addition, through the nanoindentation test, we found that although the M23C6 precipitated phase can harden the material, at the micro level, the elastic modulus and nano-hardness of the precipitated phase are lower than that of the homogeneous phase.
WOS关键词WELDED-JOINTS ; CLAM STEEL ; BEHAVIOR ; DEFORMATION
资助项目Foundation of Natural Science Foundation of China[52075317] ; Science Foundation of Institute of Plasma Physics Chinese Academy of Sciences[DSJJ-18-01] ; Royal Society through International Exchanges Cost Share (China)[IEC\NSFC\181278] ; Shanghai Science and Technology Committee Innovation Grant[19511106400] ; Shanghai Science and Technology Committee Innovation Grant[19511106402] ; Shanghai Local Colleges and Universities Capacity Building Special Plan Project[19030501300]
WOS研究方向Engineering
语种英语
出版者ELSEVIER SCI LTD
WOS记录号WOS:000855539500001
资助机构Foundation of Natural Science Foundation of China ; Science Foundation of Institute of Plasma Physics Chinese Academy of Sciences ; Royal Society through International Exchanges Cost Share (China) ; Shanghai Science and Technology Committee Innovation Grant ; Shanghai Local Colleges and Universities Capacity Building Special Plan Project
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/128994]  
专题中国科学院合肥物质科学研究院
通讯作者Zhang, Peilei; Yu, Zhishui; Fang, Chao
作者单位1.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China
2.Shanghai Collaborat Innovat Ctr Laser Mfg Technol, Shanghai 201620, Peoples R China
3.Univ Lancaster, Dept Engn, Lancaster LA1 4YW, England
4.Huarui Jiangsu Gas Turbine Serv Ltd Co, Nantong 226000, Peoples R China
5.Shanghai Univ Engn Sci, Sch Mat Engn, Shanghai 201620, Peoples R China
6.Fraunhofer Inst Laser Technol ILT, D-52074 Aachen, Germany
推荐引用方式
GB/T 7714		 Feng, Junyi,Zhang, Peilei,Jia, Zhiyuan,et al. Laser additive manufacturing and post-heat treatment on microstructure and mechanical properties of 9Cr steel[J]. INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING,2022,198.
APA Feng, Junyi.,Zhang, Peilei.,Jia, Zhiyuan.,Yu, Zhishui.,Fang, Chao.,...&Xie, Fan.(2022).Laser additive manufacturing and post-heat treatment on microstructure and mechanical properties of 9Cr steel.INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING,198.
MLA Feng, Junyi,et al."Laser additive manufacturing and post-heat treatment on microstructure and mechanical properties of 9Cr steel".INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING 198(2022).

入库方式： OAI收割

来源：合肥物质科学研究院

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