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

doi:10.1016/j.ijpvp.2022.104681

	Laser additive manufacturing and post-heat treatment on microstructure and mechanical properties of 9Cr steel
	Feng, Junyi 1,2; Zhang, Peilei 1,2,3; Jia, Zhiyuan 1,2; Yu, Zhishui 1,2; Fang, Chao 4; Yan, Hua 1,2; Shi, Haichuan 1,2; Tian, Yingtao 5; Xie, Fan 6
刊名	INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING
	2022-08-01
卷号	198
关键词	Laser melting deposition (LMD) 9Cr steel Different powder size Post-heat treatment Mechanical properties Microstructure
ISSN号	0308-0161
DOI	10.1016/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.
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关键词	WELDED-JOINTS ; CLAM STEEL ; BEHAVIOR ; DEFORMATION
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
内容类型	期刊论文
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.Shanghai Univ Engn Sci, Sch Mat Engn, Shanghai 201620, Peoples R China 2.Shanghai Collaborat Innovat Ctr Laser Mfg Technol, Shanghai 201620, Peoples R China 3.Fraunhofer Inst Laser Technol ILT, D-52074 Aachen, Germany 4.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China 5.Univ Lancaster, Dept Engn, Lancaster LA1 4YW, England 6.Huarui Jiangsu Gas Turbine Serv Ltd Co, Nantong 226000, Peoples R China
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).