フルテキストURL fulltext.pdf
著者 Karunathilaka, Nuwan| Tada, Naoya| Uemori, Takeshi| Hanamitsu, Ryota| Fujii, Masahiro| Omiya, Yuya| Kawano, Masahiro|
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 10.3390/met9070783
Web of Science KeyUT 000482332400067
関連URL isVersionOf https://doi.org/10.3390/met9070783
JaLCDOI 10.18926/15466
フルテキストURL Mem_Fac_Eng_OU_24_1_1.pdf
著者 吉田 彰| 大上 祐司| 藤井 正浩|
抄録 To clarify the effects of a drive system lubricant additive upon rolling fatigue of rollers manufactured from carburized and hardened steel, three types of oil were used as lubricants: one mineral base oil and the other two mineral base oils to which an S-P additive package and ATF additive package were added, respectively. These specimens were tested for sliding/rolling fatigue and examined for failure on the surface, rolling fatigue strength, and other properties. Roller surface temperatures and inter-roller frictional coefficients were found scarcely affected by the type of oil used. Irrespective of the difference in oil type, failure on the surface was found to be entirely spalling attributable to cracks generated in the subsurface. The depth at which spalling cracks had taken place was found nearly coincident with the depth at which a ratio of reversing orthogonal shear stress to hardness had amplitude A(Tyz/Hv) maximized. These depths were larger as Hertz stress became more prominent. Nevertheless, they were found hardly affected by the type of oil. Although rolling fatigue strength did not show a significant difference dependent upon the type of oil, it may be said that fatigue life would be somewhat negatively affected by an extreme pressure coated film with a content of sulfur and phosphorus.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 1989-11-29
24巻
1号
開始ページ 1
終了ページ 12
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002307588
JaLCDOI 10.18926/14134
フルテキストURL Mem_Fac_Eng_39_1_1.pdf
著者 Vladimir I. Klochikhin| 藤井 正浩| 吉田 彰|
抄録 Improvement of wear resistance and durability of machine elements with sliding friction pairs is the important tribological problems. The wear resistance has been determined with many configurative parameters, technological parameters, and operational parameters. In this study kinematics of cylindrical joint (CJ), whose motion is reciprocating and rotating, and influence of various parameters on wear resistance of friction pair was investigated.
出版物タイトル Memoirs of the Faculty of Engineering, Okayama University
発行日 2005-01
39巻
1号
開始ページ 1
終了ページ 6
ISSN 0475-0071
言語 English
論文のバージョン publisher
NAID 120002308183