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

doi:10.1016/j.ijpvp.2022.104681

HFCAS OpenIR

	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, Chao4 ; Yan, Hua 1,2; Shi, Haichuan 1,2; Tian, Yingtao 5; Xie, Fan 6
	2022-08-01
发表期刊	INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING
ISSN	0308-0161
通讯作者	Zhang, Peilei(peilei@sues.edu.cn) ; Yu, Zhishui(yu_zhishui@163.com) ; Fang, Chao(fangchao@ipp.ac.ch)
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.
关键词	Laser melting deposition (LMD) 9Cr steel Different powder size Post-heat treatment Mechanical properties Microstructure
DOI	10.1016/j.ijpvp.2022.104681
关键词[WOS]	WELDED-JOINTS ; CLAM STEEL ; BEHAVIOR ; DEFORMATION
收录类别	SCI
语种	英语
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]
项目资助者	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
WOS研究方向	Engineering
WOS类目	Engineering, Multidisciplinary ; Engineering, Mechanical
WOS记录号	WOS:000855539500001
出版者	ELSEVIER SCI LTD
引用统计	被引频次：5[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.hfcas.ac.cn:8080/handle/334002/128995
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
通讯作者单位	中科院等离子体物理研究所
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).