发明名称 |
METHOD FOR PRODUCING METAL TUBE |
摘要 |
In this method, the inner surface of a metal pipe containing, by mass percent, 20 to 55% of Cr and 20 to 70% of Ni is subjected to mechanical treatment, the metal pipe is subjected to heat treatment such as to be held in a temperature range of 1050 to 1270°C for 0.5 to 60 minutes, and thereby an oxide scale layer consisting mainly of Cr is formed on at least the inner surface of the metal pipe. A metal pipe excellent in carburization resistance and coking resistance in a carburizing gas environment can be obtained by the method. |
申请公布号 |
KR20110107370(A) |
申请公布日期 |
2011.09.30 |
申请号 |
KR20117019029 |
申请日期 |
2010.02.15 |
申请人 |
SUMITOMO METAL INDUSTRIES, LTD. |
发明人 |
NISHIYAMA YOSHITAKA;UEYAMA MASAKI;TOYODA MASATOSHI |
分类号 |
C23C8/10;B21C37/20;C21D7/06;C21D9/08 |
主分类号 |
C23C8/10 |
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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