发明名称 |
HIGH STRENGTH, HIGH TOUGHNESS, SEAMLESS STEEL PIPE FOR LINE PIPE |
摘要 |
A seamless steel pipe for a line pipe having high strength and high toughness which has a chemical composition: c: 0.03 to 0.06 %, Si: 0.05 to 0.15 %, Mn: 1.6 to 2.0 %, Al: 0.010 to 0.10 %, Ni: 0.3 to 0.7 %, Mo: 0.10 to 0.40 %, V: 0.01 to 0.06 %, Nb: 0.003 to 0.03 %, Ti: 0.003 to 0.020 %, N: 0.0010 to 0.0100 %, and balance: Fe and inevitable impurities, with the proviso that Mo + 5V >/= 0.4 % and 2Nb - V </= 0 %. The seamless steel pipe is capable of securing the strength and toughness of the X80 grade with stability, and has heat-treatment characteristics which allows the achievement of desired strength with ease independently of the size of a pipe.
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申请公布号 |
WO0157286(A1) |
申请公布日期 |
2001.08.09 |
申请号 |
WO2001JP00505 |
申请日期 |
2001.01.26 |
申请人 |
KAWASAKI STEEL CORPORATION;MIYATA, YUKIO;KIMURA, MITSUO;TOYOOKA, TAKAAKI;ITAKURA, NORITSUGU |
发明人 |
MIYATA, YUKIO;KIMURA, MITSUO;TOYOOKA, TAKAAKI;ITAKURA, NORITSUGU |
分类号 |
C21D1/18;C21D8/10;C22C38/04;C22C38/08;C22C38/12;C22C38/14;F16L9/02;(IPC1-7):C22C38/00;C21D9/08 |
主分类号 |
C21D1/18 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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