发明名称 |
METHOD OF OXIDIZING INNER SURFACE OF FERRITIC STAINLESS STEEL PIPE |
摘要 |
<p>A method of oxidation treatment of the inner surface of a ferritic stainless steel pipe comprising feeding an oxidizing gas into steel pipe from one end thereof while moving the steel pipe in a pipe-length direction, and heating the pipe in a heating furnace in a non-oxidizing atmosphere at a specific temperature of T DEG C which falls within the range of 700 to 1100 DEG C. The method is capable of efficiently forming Cr oxide film having a uniform Cr content and film thickness over the entire length of the inner surface of the steel pipe used as a piping member or piping for supplying a high-purity fluid, such as high-purity gas or water used in a semiconductor manufacturing process. <IMAGE></p> |
申请公布号 |
EP1016734(A1) |
申请公布日期 |
2000.07.05 |
申请号 |
EP19980928631 |
申请日期 |
1998.06.22 |
申请人 |
SUMITOMO METAL INDUSTRIES LIMITED |
发明人 |
AZUMA, SHIGEKI |
分类号 |
C22C38/00;C23C8/10;C23C8/18;(IPC1-7):C23C8/18 |
主分类号 |
C22C38/00 |
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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