Influence of Oxygen Concentration in Building Environment and Oxidation Extent of Maraging Steel on Spatter Generation Behavior in Powder Bed Fusion

This study investigated the influence of oxygen concentration in the building environment and the degree of oxidation of maraging steel powder on spatter generation behavior during powder bed fusion (PBF) process. The powders were oxidized at various heat treatment temperatures, and their degree of...

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Bibliographic Details
Published in:International journal of automation technology 2023-07, Vol.17 (4), p.346-355
Main Authors: Yamaguchi, Mitsugu, Tsubouchi, Kotaro, Kamimoto, Asako, Yamada, Shinnosuke, Sugiyama, Kenji, Furumoto, Tatsuaki
Format: Article
Language:English
Subjects:
Additive manufacturing
Advanced manufacturing technologies
Beds (process engineering)
Heat treatment
Intermetallic compounds
Lasers
Maraging steels
Mechanical properties
Metal powders
Oxidation
Oxide coatings
Oxygen
Powder beds
Purity
R&D
Research & development
Spectrum analysis
Steel
Temperature
Vapor jets
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Summary:This study investigated the influence of oxygen concentration in the building environment and the degree of oxidation of maraging steel powder on spatter generation behavior during powder bed fusion (PBF) process. The powders were oxidized at various heat treatment temperatures, and their degree of oxidation was evaluated using Auger electron spectroscopy. The spatter generation behavior of the powders at oxygen concentrations of 1.0×10 2 ppm (99.99% purity) to 5.0×10 4 ppm (95% purity) in the building atmosphere was then investigated. The results indicated that the presence of oxygen in the building environment had a greater effect on spatter generation than the oxide film on the maraging steel powder. The oxygen concentration affected the velocity and angle of spatter particles. At an oxygen concentration of 5.0×10 4 ppm, the number of spatter particles was 2.5 times greater than that of 1.0×10 2 ppm. A higher oxygen concentration resulted in an increase in the number of fume particles adhering to the spatter surface, reducing its reusability. The oxide film on the powder did not significantly affect the vapor jet behavior, but it altered the powder’s flowability, impacting the spatter generation. To decrease spatter generation and obtain a high-quality spatter surface, it is recommended that the oxygen concentration in the building environment should be maintained at 1.0×10 2 ppm.
ISSN:1881-7629
1883-8022
DOI:10.20965/ijat.2023.p0346