发明名称 |
SEAMLESS-METAL-PIPE MANUFACTURING METHOD. |
摘要 |
<p>Provided is a seamless-metal-pipe manufacturing method whereby cracking of the inner surface of the pipe is inhibited. The seamless-metal-pipe manufacturing method in this embodiment is provided with the following steps: a step (S2) in which a high-alloy billet (BL) containing 20-30% chromium and more than 22% but no more than 60% nickel, by mass, is heated in a furnace (F1); a step (S3) in which hollow tube stock is produced by using a piercer (P1) to pierce/roll the high-alloy billet (BL) that has been heated in the furnace (F1); a step (S4) in which the hollow tube stock is cooled and then heated in the furnace (F1) again; and a step (S5) in which the piercer (P1) is used to draw/roll the heated hollow tube stock (HS).</p> |
申请公布号 |
MX2014005239(A) |
申请公布日期 |
2014.08.27 |
申请号 |
MX20140005239 |
申请日期 |
2012.10.24 |
申请人 |
NIPPON STEEL & SUMITOMO METAL CORPORATION |
发明人 |
TOMIO YAMAKAWA;KAZUHIRO SHIMODA;KOUJI YAMANE |
分类号 |
B21B19/06;B21B19/04 |
主分类号 |
B21B19/06 |
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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