Study on microstructure and properties of low-alloy steel fabricated by laser wire-feed additive manufacturing

Liu Xuming; Zhang Dayue; Zhang Jian; Li Binzhou; Zhao Yang; Wang Junsheng

doi:10.7513/j.issn.1004-7638.2022.01.018

Volume 43 Issue 1

Mar. 2022

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Liu Xuming, Zhang Dayue, Zhang Jian, Li Binzhou, Zhao Yang, Wang Junsheng. Study on microstructure and properties of low-alloy steel fabricated by laser wire-feed additive manufacturing[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(1): 119-124. doi: 10.7513/j.issn.1004-7638.2022.01.018

Citation:

Liu Xuming, Zhang Dayue, Zhang Jian, Li Binzhou, Zhao Yang, Wang Junsheng. Study on microstructure and properties of low-alloy steel fabricated by laser wire-feed additive manufacturing[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(1): 119-124. doi: 10.7513/j.issn.1004-7638.2022.01.018

Citation:

Liu Xuming, Zhang Dayue, Zhang Jian, Li Binzhou, Zhao Yang, Wang Junsheng. Study on microstructure and properties of low-alloy steel fabricated by laser wire-feed additive manufacturing[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(1): 119-124. doi: 10.7513/j.issn.1004-7638.2022.01.018

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Study on microstructure and properties of low-alloy steel fabricated by laser wire-feed additive manufacturing

doi: 10.7513/j.issn.1004-7638.2022.01.018

Ansteel Beijing Research Institute, Beijing 102200, China

Received Date: 2021-03-29
Available Online: 2022-04-24
Publish Date: 2022-02-28

Abstract

Abstract

In this investigation, the low-alloy steel wire applied in additive manufacturing was made by clean steelmaking, hot rolling and drawing; subsequently, laser wire-feed additive manufacturing was carried out with this steel wire. The mechanical properties of the 3D printed parts are the yield strength of 857 MPa, the tensile strength of 930 MPa and the elongation of 18%, the average low-temperature impact toughness of −40 ℃ reaches 118 J, respectively, whose can meet the requirements of 900 MPa class in the marine engineering field by the method of additive manufacturing. In terms of scanning electron micrograph (SEM) and transmission electron microscope (TEM), and analysis of the microstructure of the printed pieces, the results showed that the microstructure was composed of granular bainite, lath bainite and diffusely distributed martensite-austenite constituents on the bainitic matrix, whose could improve the tensile property and impact property simultaneously.
- additive manufacturing,
- low alloy steel,
- steel wire,
- bainite,
- martensite-austenite constituent,
- impact toughness

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References(19)

References

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