Invention Grant
US08268095B2 Method of manufacturing hot dip galvannealed steel sheet and hot dip galvannealed steel sheet
有权
热浸合金化热镀锌钢板和热浸合金化热镀锌钢板的制造方法
- Patent Title: Method of manufacturing hot dip galvannealed steel sheet and hot dip galvannealed steel sheet
- Patent Title (中): 热浸合金化热镀锌钢板和热浸合金化热镀锌钢板的制造方法
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Application No.: US12226168Application Date: 2007-04-26
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Publication No.: US08268095B2Publication Date: 2012-09-18
- Inventor: Hiroyuki Masuoka , Shoichiro Taira , Yoshiharu Sugimoto , Naoto Yoshimi , Masayasu Nagoshi , Wataru Tanimoto
- Applicant: Hiroyuki Masuoka , Shoichiro Taira , Yoshiharu Sugimoto , Naoto Yoshimi , Masayasu Nagoshi , Wataru Tanimoto
- Applicant Address: JP Tokyo
- Assignee: JFE Steel Corporation
- Current Assignee: JFE Steel Corporation
- Current Assignee Address: JP Tokyo
- Agency: Holtz Holtz Goodman & Chick PC
- Priority: JP2006-128135 20060502; JP2007-016282 20070126
- International Application: PCT/JP2007/059432 WO 20070426
- International Announcement: WO2007/129678 WO 20071115
- Main IPC: C23C22/48
- IPC: C23C22/48 ; C23C22/05

Abstract:
A method of manufacturing a hot dip galvannealed steel sheet, including the steps of: subjecting a steel sheet to hot dip galvanizing to manufacture a hot dip galvanized steel sheet; heating the hot dip galvanized steel sheet for alloying; subjecting the hot dip galvanized steel sheet to temper rolling; bringing the temper-rolled hot dip galvanized steel sheet into contact with an acid solution containing at least one ion selected from the group consisting of Zr ions, Ti ions, and Sn ions to thereby form an acid solution film on the surface of the steel sheet; after completion of the contact, a state where the acid solution film is formed on the surface of the steel sheet is held for at least 1 second; and washing with water the hot dip galvanized steel sheet after holding, to thereby form a Zn oxide layer having a thickness of 10 nm or more on the surface of the galvanized steel sheet. The hot dip galvannealed steel sheet has an oxide layer having an average thickness of 10 nm or more on the surface of the plated steel sheet.
Public/Granted literature
- US20090239063A1 Method of Manufacturing Hot Dip Galvannealed Steel Sheet and Hot Dip Galvannealed Steel Sheet Public/Granted day:2009-09-24
Information query
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