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Effect of hot charge rolling condition on mechanical properties of Nb bearing steel plate

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ISIJ Int. 30(3) 241-247.pdf1.22 MBPDFView/Open
Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/76976

Title: Effect of hot charge rolling condition on mechanical properties of Nb bearing steel plate
Authors: Kamada, Yoshihiko Browse this author
Hashimoto, Tamotsu Browse this author
Watanabe, Seiichi Browse this author →KAKEN DB
Keywords: high strength low alloy steel
plate
phase transformation
precipitation
recrystallization
strength
Issue Date: 15-Mar-1990
Publisher: Iron and Steel Institute of Japan
Journal Title: ISIJ International
Volume: 30
Issue: 3
Start Page: 241
End Page: 247
Publisher DOI: 10.2355/isijinternational.30.241
Abstract: A large number of steel plates is currently produced by HCR (Hot Charge Rolling) process. In this study, the effect of HCR condition on the mechanical properties of Nb bearing steel is investigated. If the charging temperature is above Ar1, the toughness of Nb bearing steel through HCR process is inferior to conventionally rolled one. This phenomenon comes from the larger amount of Nb in solid solution in the HCR process than in the CCR (Cold Charged Rolling) process. This Nb in solid solution markedly retards the recrystallization of austenite and then it precipitates finely as Nb(CN) after rolling in the HCR process. To improve the balance between the tensile strength and ductile-brittle transition temperature in Nb bearing steel at a charging temperature above Ar1, 1100°C is the most favorable for the rolling start temperature, because the finest austenite grain is obtained at this temperature range due to the homogeneous recrystallization.
Type: article
URI: http://hdl.handle.net/2115/76976
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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