Results
Title

プラズマ回転電極 (PREP) 法による微細粉末が得られる 動的バランスにおけるプロセスパラメータの検討.

Authors

王 昊; 崔 玉杰; 楊 建文; 千葉 赳巳; 藤枝 正; 山中 謙太; 千葉 晶彦

Abstract

Due to the increasing demand for high-precision products in metal additive manufacturing, such as powder bed fusion, there is growing expectation for high-quality fine powders produced by the Plasma Rotating Electrode Process (PREP) method. However, the PREP method currently faces a bottleneck due to its low acquisition rate of fine powders below 50 μm. In this study, we analyzed the generation and control of molten layers in PREP and their relationship with centrifugal force, aiming for size reduction. Through experiments using SUS316L and Ti6Al4V alloys, we demonstrated that process parameters such as material diameter, melting current, and cooling gas could control powder size. A significant increase in the acquisition rate of fine powders with an average particle size below 40 μm was observed using a production-scale PREP apparatus with specific parameters. Furthermore, we found that the gas cooling mechanism plays a crucial role in controlling parameters like the melting temperature of the molten layer.

Subjects

PLASMA electrodes; CENTRIFUGAL force; METAL products; MANUFACTURING processes; MELTING

Publication

Journal of the Japan Society of Powder & Powder Metallurgy / Funtai Oyobi Fummatsu Yakin, 2024, Vol 71, Issue 12, p668

ISSN

0532-8799

Publication type

Academic Journal

DOI

10.2497/jjspm.24-00035