Invention Grant
- Patent Title: Outer-layer material for hot-rolling roll, and hot-rolling composite roll
- Patent Title (中): 用于热轧辊的外层材料和热轧复合辊
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Application No.: US14427759Application Date: 2013-09-06
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Publication No.: US09573176B2Publication Date: 2017-02-21
- Inventor: Kenji Ichino , Tetsuo Mochida , Hiromitsu Shibata
- Applicant: JFE STEEL CORPORATION
- Applicant Address: JP Tokyo
- Assignee: JFE STEEL CORPORATION
- Current Assignee: JFE STEEL CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: Oliff PLC
- Priority: JP2012-201514 20120913
- International Application: PCT/JP2013/005301 WO 20130906
- International Announcement: WO2014/041778 WO 20140320
- Main IPC: B21B27/00
- IPC: B21B27/00 ; B21B27/03 ; C22C37/08 ; C22C37/10 ; B22D11/128 ; C22C38/00 ; C22C38/02 ; C22C38/04 ; C22C38/06 ; C22C38/34 ; C22C38/44 ; C22C38/46 ; C22C38/48 ; C22C38/50 ; C22C38/52 ; C22C38/54 ; C22C38/56 ; B32B15/01 ; C21D9/38
Abstract:
A surface layer material of a hot rolling mill roll is provided. The surface layer has a chemical composition containing, by mass %, C: 2.4% or more and 3.5% or less, Si: 1.2% or more and 2.4% or less, Mn: 0.2% or more and 2.0% or less, Cr: 0.8% or more and 2.1% or less, Mo: 0.3% or more and 1.1% or less, Ni: 3.0% or more and 6.0% or less, V: 1.0% or more and 2.2% or less, Nb: 0.1% or more and 0.5% or less, REM: 0.0005%) or more and 0.1% or less, Al: 0.003% or more and 0.05% or less, and the balance being Fe and inevitable impurities. The contents of C, Cr, V, Nb, REM, and Al satisfy the relationships Cr+0.2≦C−(0.24×V+0.13×Nb)≦3.0 and 0.01≦REM/Al≦3.2.
Public/Granted literature
- US20150239026A1 OUTER-LAYER MATERIAL FOR HOT-ROLLING ROLL, AND HOT-ROLLING COMPOSITE ROLL Public/Granted day:2015-08-27
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