| 发明名称 |
DELAYED FRACTURE PREVENTION METHOD FOR STEEL STRUCTURE AND STEEL STRUCTURE MANUFACTURING METHOD |
| 摘要 |
<p>A delayed fracture prevention method for a steel structure formed of steel materials having a tensile strength of 600 N/mm<2> or higher and/or welded joints for the steel materials, wherein an ultrasonic shock treatment hammering by an ultrasonic vibrating terminal having a tip part diameter of 1 to 5 mm is applied onto the stress-concentrated part of the steel structure.</p> |
| 申请公布号 |
WO2004046392(A1) |
申请公布日期 |
2004.06.03 |
| 申请号 |
WO2003JP14334 |
申请日期 |
2003.11.11 |
| 申请人 |
NIPPON STEEL CORPORATION;ISHIKAWA, TADASHI;NAKASHIMA, KIYOTAKA;NOSE, TETSURO |
发明人 |
ISHIKAWA, TADASHI;NAKASHIMA, KIYOTAKA;NOSE, TETSURO |
| 分类号 |
B23K31/00;C21D7/04;(IPC1-7):C21D7/04 |
主分类号 |
B23K31/00 |
| 代理机构 |
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