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ID 58057
フルテキストURL
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著者
Karunathilaka, Nuwan Graduate School of Natural Science and Technology, Okayama University
Tada, Naoya Graduate School of Natural Science and Technology, Okayama University ORCID Kaken ID publons researchmap
Uemori, Takeshi Graduate School of Natural Science and Technology, Okayama University Kaken ID researchmap
Hanamitsu, Ryota Graduate School of Natural Science and Technology, Okayama University
Fujii, Masahiro Graduate School of Natural Science and Technology, Okayama University Kaken ID publons researchmap
Omiya, Yuya Graduate School of Natural Science and Technology, Okayama University Kaken ID
Kawano, Masahiro Zeno Tech Co., Ltd
抄録
Cold forging is a metal forming that which uses localized compressive force at room temperature. During the cold forging process, the tool is subjected to extremely high loads and abrasive wear. Lubrication plays an important role in cold forging to improve product quality and tool life by preventing direct metallic contact. Surface roughness and residual stress also greatly affects the service life of a tool. In this study, variations in surface roughness, residual stress, and specimen deformation with the number of cold forging cycles were investigated under different forging conditions. Specimens that were made of heat-treated SKH51 (59-61 HRC), a high-speed tool steel with a polished working surface, were used. The specimens were subjected to an upsetting process. Compressive residual stress, surface roughness, and specimen deformation showed a positive relationship with the number of forging cycles up to a certain limit and became almost constant in most of the forging conditions. A larger change in residual stress and surface roughness was observed at the center of the specimens in all the forging conditions. The effect of the magnitude of the forging load on the above discussed parameters is large when compared to the effect of the lubrication conditions.
キーワード
cold forging
high-speed tool steel
lubrication
residual stress
surface roughness
tool deformation
発行日
2019-07-12
出版物タイトル
Metals
9巻
7号
出版者
MDPI
開始ページ
783
ISSN
2075-4701
資料タイプ
学術雑誌論文
言語
English
OAI-PMH Set
岡山大学
著作権者
© 2019 by the authors.
論文のバージョン
publisher
DOI
Web of Science KeyUT
関連URL
isVersionOf https://doi.org/10.3390/met9070783
ライセンス
http://creativecommons.org/licenses/by/4.0/