Invention Application
US20160151832A1 SPRING STEEL WITH EXCELLENT FATIGUE RESISTANCE AND METHOD OF MANUFACTURING THE SAME
审中-公开
具有优异耐疲劳性的弹簧钢及其制造方法
- Patent Title: SPRING STEEL WITH EXCELLENT FATIGUE RESISTANCE AND METHOD OF MANUFACTURING THE SAME
- Patent Title (中): 具有优异耐疲劳性的弹簧钢及其制造方法
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Application No.: US14785815Application Date: 2013-04-23
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Publication No.: US20160151832A1Publication Date: 2016-06-02
- Inventor: Masafumi MIYAZAKI , Hideaki YAMAMURA , Masayuki HASHIMURA , Takashi FUJITA
- Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
- International Application: PCT/JP2013/061877 WO 20130423
- Main IPC: B22D11/11
- IPC: B22D11/11 ; B22D11/114 ; B22D11/00 ; C21C7/00 ; C21C7/10 ; C21D9/02 ; C21D6/00 ; C21D1/26 ; C22C38/54 ; C22C38/50 ; C22C38/48 ; C22C38/46 ; C22C38/44 ; C22C38/42 ; C22C38/34 ; C22C38/28 ; C22C38/26 ; C22C38/24 ; C22C38/22 ; C22C38/20 ; C22C38/16 ; C22C38/14 ; C22C38/08 ; C22C38/06 ; C22C38/04 ; C22C38/02 ; C22C38/00 ; B22D11/113
Abstract:
A spring steel includes a predetermined chemical composition and a composite inclusion having a maximum diameter of 2 μm or more that TiN is adhered to an inclusion containing REM, O and Al, in which the number of the composite inclusion is 0.004 pieces/mm2 to 10 pieces/mm2, the maximum diameter of the composite inclusion is 40 μm or less, the sum of the number density of an alumina cluster having the maximum diameter of 10 μm or more, MnS having the maximum diameter of 10 μm or more and TiN having the maximum diameter of 1 μm to 10 pieces/mm2.
Public/Granted literature
- US10350676B2 Spring steel with excellent fatigue resistance and method of manufacturing the same Public/Granted day:2019-07-16
Information query
