Research on the influence of various process parameters on the properties of 304 stainless steel prototypes by electron beam free form fabrication

Huang Xingguang; Sun Baofu

doi:10.7513/j.issn.1004-7638.2024.03.022

Volume 45 Issue 3

Jul. 2024

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Huang Xingguang, Sun Baofu. Research on the influence of various process parameters on the properties of 304 stainless steel prototypes by electron beam free form fabrication[J]. IRON STEEL VANADIUM TITANIUM, 2024, 45(3): 162-168. doi: 10.7513/j.issn.1004-7638.2024.03.022

Citation:

Huang Xingguang, Sun Baofu. Research on the influence of various process parameters on the properties of 304 stainless steel prototypes by electron beam free form fabrication[J]. IRON STEEL VANADIUM TITANIUM, 2024, 45(3): 162-168. doi: 10.7513/j.issn.1004-7638.2024.03.022

Citation:

Huang Xingguang, Sun Baofu. Research on the influence of various process parameters on the properties of 304 stainless steel prototypes by electron beam free form fabrication[J]. IRON STEEL VANADIUM TITANIUM, 2024, 45(3): 162-168. doi: 10.7513/j.issn.1004-7638.2024.03.022

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Research on the influence of various process parameters on the properties of 304 stainless steel prototypes by electron beam free form fabrication

doi: 10.7513/j.issn.1004-7638.2024.03.022

Huang Xingguang^{1, 2
,},
Sun Baofu^{1
,
,}

1.
College of Mechanical and Control Engineering, Guilin University of Technology, Guilin 541004, Guangxi, China
2.
Guilin Shida Technology Co., Ltd., Guilin 541004, Guangxi, China

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Received Date: 2023-06-10
Publish Date: 2024-07-02

Abstract

Abstract

304 stainless steel wire with a diameter of 1 mm was used as the material to prepare 304 stainless steel samples using electron beam fusion deposition technology (EBF³) for mechanical properties and microstructure analysis. Nine sets of experimental were designed for single factor experiments, where the beam intensity, wire feeding speed, and substrate feeding speed were changed for printing. The results showed that the tensile strength and yield strength of 9 groups of specimens were excellent, but their elongations were average. Among them, when the beam current was 26 mA, the wire feeding speed was 1400 mm/min, and the feed speed was 400 mm/min, the characteristics of the specimens were the best, with a maximum tensile strength of 1328.92 MPa, a maximum yield strength of 711.60 MPa, and a fracture elongation of 34.45%. Through the comprehensive analysis, it can be concluded that changing the wire feeding speed has the greatest impact on the plasticity of 304 stainless steel tensile parts, and changing the moving speed has the greatest impact on the strength of 304 stainless steel specimens. In addition, the microstructure of 304 stainless steel specimens with varying beam and feeding rates was composed of austenite. While, the microstructure of specimens with varying wire feeding rates was mostly composed of austenitic transformation phases precipitates; The changes in beam flow and wire feeding speed were mainly due to changes in the composition of the microstructure, while the changes in feed speed were mainly due to changes in grain size, ultimately resulting in the properties variation of different tensile parts. During the fracture analysis by scanning electron microscopy, it was found that brittle fracture occurred in all specimens during the tensile tests.
- EBF³,
- 304 stainless steel,
- wire feed speed,
- beam intensity,
- wire feeding speed,
- microstructure,
- tensile property

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References(15)

References

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