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Ironmaking & Steelmaking
Processes, Products and Applications
Volume 47, 2020 - Issue 9
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Research Articles

Effect of aging treatment on microstructure and properties of additively manufactured maraging steel

Fei Zhoua School of Materials Engineering, Shanghai University of Engineering Science, Shanghai, People’s Republic of China;b Shanghai Collaborative Innovation Center of Laser Advanced Manufacturing Technology, Shanghai, People’s Republic of ChinaView further author information
,
Riming Wua School of Materials Engineering, Shanghai University of Engineering Science, Shanghai, People’s Republic of China;b Shanghai Collaborative Innovation Center of Laser Advanced Manufacturing Technology, Shanghai, People’s Republic of ChinaCorrespondence[email protected]
View further author information
,
Wenfei Xiea School of Materials Engineering, Shanghai University of Engineering Science, Shanghai, People’s Republic of China;b Shanghai Collaborative Innovation Center of Laser Advanced Manufacturing Technology, Shanghai, People’s Republic of ChinaView further author information
&
Liang Zhangc Shanghai Research Institute of Materials, Shanghai, People’s Republic of ChinaORCID Iconhttps://orcid.org/0000-0003-4253-082XView further author information
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Pages 980-985 | Received 24 Jul 2019, Accepted 29 Jul 2019, Published online: 12 Aug 2019
 
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ABSTRACT

Additively manufactured grade 300 maraging steel (AM300) exhibits high strength but low elongation, because the precipitation strengthening effected by aging treatment has not been fully took effect. This work aims to optimize the aging treatment process of AM300. It was aged at 420°C, 500°C and 550°C for 4 h, respectively. It was found that the aged AM300 exhibited the best combination of strength and ductility (ultimate tensile strength (UTS) was 1740 MPa, total elongation (TE) was 10.2%, hardness was 520.4 HV) at 420°C. As compared to the non-aged AM300 (UTS = 1060 MPa, TE = 4.2%, hardness = 349.2 HV), the UTS, TE and hardness were increased by 64.1%, 142% and 49%, respectively.

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This study is funded by National Natural Science Foundation of China [grant numbers 51375294 and 51301105].

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