Invention Grant
- Patent Title: Iron and steel material having quenched surface layer part, method for producing the iron and steel material, and quenched component
- Patent Title (中): 具有淬火表面层部分的钢铁材料,生产钢铁材料的方法和淬火组分
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Application No.: US12993468Application Date: 2009-05-19
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Publication No.: US08545642B2Publication Date: 2013-10-01
- Inventor: Kengo Fukazawa , Yoshitaka Misaka , Kazuhiro Kawasaki , Yoshihiro Ikeda , Masaaki Beppu , Arata Suda
- Applicant: Kengo Fukazawa , Yoshitaka Misaka , Kazuhiro Kawasaki , Yoshihiro Ikeda , Masaaki Beppu , Arata Suda
- Applicant Address: JP Tokyo JP Tokyo
- Assignee: Neturen Co., Ltd.,Nihon Parkerizing Co., Ltd.
- Current Assignee: Neturen Co., Ltd.,Nihon Parkerizing Co., Ltd.
- Current Assignee Address: JP Tokyo JP Tokyo
- Agency: Chen Yoshimura LLP
- Priority: JP2008-131403 20080519
- International Application: PCT/JP2009/059194 WO 20090519
- International Announcement: WO2009/142205 WO 20091126
- Main IPC: C23C8/58
- IPC: C23C8/58 ; C23C8/80 ; C21D1/10

Abstract:
Providing an iron and steel material having quenched surface part, avoiding oxidation of a compound layer formed on the surface of the iron and steel material due to quenching, its production method, and an induction-quenched component. A quenched iron and steel material 10 comprises an iron and steel material 11, a compound layer 12 formed on the iron and steel material 11, and an antioxidant cover layer 13 formed on the compound layer 12. The iron and steel material 11 has a hardened layer having a given depth, and the surface of the iron and steel material 11 has enhanced hardness. A method for producing the iron and steel material 10 comprises a first step for forming the antioxidant cover layer 13 to cover the compound layer 12 formed on the iron and steel material 11, and a second step for applying induction hardening to the iron and steel material 11 having the compound layer 12 and the antioxidant cover layer 13, with the temperature increased in a given heating time until the given heating temperature is reached, and with cooling immediately performed once the heating temperature is reached.
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