Mechanical properties and microstructure of 3D-printed high Co-Ni secondary hardening steel fabricated by laser melting deposition

Hui-ping Duan; Xiao Liu; Xian-zhe Ran; Jia Li; Dong Liu

doi:10.1007/s12613-017-1492-4

Volume 24 Issue 9

Sep. 2017

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文章导航 > 矿物冶金与材料学报（英文） > 2017 > 24(9): 1027-1033

Hui-ping Duan, Xiao Liu, Xian-zhe Ran, Jia Li, and Dong Liu, Mechanical properties and microstructure of 3D-printed high Co-Ni secondary hardening steel fabricated by laser melting deposition, Int. J. Miner. Metall. Mater., 24(2017), No. 9, pp. 1027-1033. https://doi.org/10.1007/s12613-017-1492-4

Cite this article as:

Hui-ping Duan, Xiao Liu, Xian-zhe Ran, Jia Li, and Dong Liu, Mechanical properties and microstructure of 3D-printed high Co-Ni secondary hardening steel fabricated by laser melting deposition, Int. J. Miner. Metall. Mater., 24(2017), No. 9, pp. 1027-1033. https://doi.org/10.1007/s12613-017-1492-4

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研究论文

Mechanical properties and microstructure of 3D-printed high Co-Ni secondary hardening steel fabricated by laser melting deposition

School of Materials Science and Engineering, Beihang University, Beijing 100191, China
National Engineering Laboratory of Additive Manufacturing for Large Metallic Components, Beijing 100191, China
Engineering Research Center of Ministry of Education on Laser Direct Manufacturing for Large Metallic Component, Beijing 100191, China

通讯作者:
Hui-ping Duan E-mail: hpduan@buaa.edu.cn

中文摘要

The mechanical properties and microstructure of the 3D-printed high Co-Ni secondary hardening steel fabricated by the laser melting deposition technique was investigated using a material testing machine and electron microscopy. A microstructure investigation revealed that the samples consist of martensite laths, fine dispersed precipitates, and reverted austenite films at the martensite lath boundaries. The precipitates are enriched with Co and Mo. Because the sample tempered at 486℃ has smaller precipitates and a higher number of precipitates per unit area, it exhibits better mechanical properties than the sample tempered at 498℃. Although the 3D-printed samples have the same phase constituents as AerMet 100 steel, the mechanical properties are slightly worse than those of the commercial wrought AerMet 100 steel because of the presence of voids.

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Research Article

Mechanical properties and microstructure of 3D-printed high Co-Ni secondary hardening steel fabricated by laser melting deposition

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Abstract

Abstract

The mechanical properties and microstructure of the 3D-printed high Co-Ni secondary hardening steel fabricated by the laser melting deposition technique was investigated using a material testing machine and electron microscopy. A microstructure investigation revealed that the samples consist of martensite laths, fine dispersed precipitates, and reverted austenite films at the martensite lath boundaries. The precipitates are enriched with Co and Mo. Because the sample tempered at 486℃ has smaller precipitates and a higher number of precipitates per unit area, it exhibits better mechanical properties than the sample tempered at 498℃. Although the 3D-printed samples have the same phase constituents as AerMet 100 steel, the mechanical properties are slightly worse than those of the commercial wrought AerMet 100 steel because of the presence of voids.
- laser deposition;
- high strength steel;
- mechanical properties;
- microstructure

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Mechanical properties and microstructure of 3D-printed high Co-Ni secondary hardening steel fabricated by laser melting deposition

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Mechanical properties and microstructure of 3D-printed high Co-Ni secondary hardening steel fabricated by laser melting deposition

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