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

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...

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Bibliographic Details
Published inIronmaking & steelmaking Vol. 47; no. 9; pp. 980 - 985
Main Authors Zhou, Fei, Wu, Riming, Xie, Wenfei, Zhang, Liang
Format Journal Article
LanguageEnglish
Published London, England Taylor & Francis 20.10.2020
SAGE Publications
Subjects
Additive manufacturing
aging treatment
maraging steel
microstructure and properties
aging treatment
Additive manufacturing
microstructure and properties
maraging steel
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Summary: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.
ISSN:0301-9233
1743-2812
DOI:10.1080/03019233.2019.1651022