| 发明名称 |
FATIGUE STRENGTH-IMPROVED STEEL AND ITS PRODUCTION METHOD |
| 摘要 |
PROBLEM TO BE SOLVED: To provide steel of which the fatigue strength is improved while its tensile strength is maintained constant. SOLUTION: The fatigue strength-improved steel exhibits, for normal steel, physical properties that a fatigue limit(σ<SB>W</SB>) defined as 10<SP>7</SP>times satisfiesσ<SB>W</SB>>0.6σ<SB>B</SB>to tensile strength(σ<SB>B</SB>) or satisfiesσ<SB>W</SB>>1.8 HV to Vickers hardness HV and exhibits, for high strength steel having a tensile strength of≥120 MPa, physical properties that a fatigue limit(σ<SB>W</SB>) defined as 10<SP>10</SP>times satisfiesσ<SB>W</SB>>0.5σ<SB>B</SB>to tensile strength(σ<SB>B</SB>) or satisfiesσ<SB>W</SB>>1.6 HV to Vickers hardness HV. COPYRIGHT: (C)2005,JPO&NCIPI
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| 申请公布号 |
JP2005082820(A) |
申请公布日期 |
2005.03.31 |
| 申请号 |
JP20030313149 |
申请日期 |
2003.09.04 |
| 申请人 |
NATIONAL INSTITUTE FOR MATERIALS SCIENCE |
发明人 |
HIRUKAWA HISASHI;FURUYA YOSHIYUKI;MATSUOKA SABURO;ABE TAKAYUKI |
| 分类号 |
C21D8/00;C22C38/00;C22C38/12;C22C38/58;(IPC1-7):C22C38/00 |
主分类号 |
C21D8/00 |
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