发明名称 |
Method of producing high-carbon steel pipe having superior cold workability and induction hardenability |
摘要 |
The invention provides a high-carbon steel pipe having superior cold workability and induction hardenability, and a method of producing the steel pipe. The method comprises the steps of heating or soaking a base steel pipe having a composition containing C: 0.3 to 0.8%, Si: not more than 2%, and Mn: not more than 3%, and then carrying out reducing rolling on the base steel pipe at least in the temperature range of (Ac1 transformation point-50° C.) to Ac1 transformation point with an accumulated reduction in diameter of not less than 30%. A structure in which the grain size of cementite is not greater than 1.0 mum is obtained, thus resulting in improved cold workability and induction hardenability.
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申请公布号 |
US2004099355(A1) |
申请公布日期 |
2004.05.27 |
申请号 |
US20030716886 |
申请日期 |
2003.11.19 |
申请人 |
JFE STEEL CORPORATION, A CORPORATION OF JAPAN |
发明人 |
TOYOOKA TAKAAKI;KAWABATA YOSHIKAZU;YORIFUJI AKIRA;NISHIMORI MASANORI;ITADANI MOTOAKI;OKABE TAKATOSHI;ARATANI MASATOSHI;KOYAMA YASUE |
分类号 |
B21B17/14;B21C37/06;B21C37/08;B21C37/16;B21C37/30;C21D8/10;C22C38/00;C22C38/02;C22C38/04;C22C38/58;(IPC1-7):C21D9/08 |
主分类号 |
B21B17/14 |
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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