发明名称 |
PROCESS FOR MANUFACTURING COLD-FORMED PRECISION STEEL PIPES |
摘要 |
<p>The invention relates to a process for manufacturing cold-formed, in particular cold-drawn, precision steel pipes for application in particular as pressure-operated cylinder pipes with optimum addition of one or several alloying elements as well as impurities caused by melting. A seamless, hot-formed pipe blank or welded pipe blank made from a hot strip with defined starting condition is hereby drawn in one pass or in several passes into a finished pipe, and the pipe undergoes a heat treatment before the finishing pass.</p> |
申请公布号 |
EP1926837(B1) |
申请公布日期 |
2014.03.12 |
申请号 |
EP20060775881 |
申请日期 |
2006.08.18 |
申请人 |
SALZGITTER MANNESMANN PRECISION GMBH |
发明人 |
SIEKMEYER, JOSEF;MUSSMANN, WOLFGANG;SEE, LOTHAR;HERZIG, SVEN |
分类号 |
C21D9/08;C21D1/25;C21D6/00;C21D9/14;C22C38/04 |
主分类号 |
C21D9/08 |
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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