发明授权
- 专利标题： Process and article
- 专利标题（中）： 流程和文章
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申请号： US803697申请日： 1991-12-04
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公开(公告)号： US5169515A公开(公告)日： 1992-12-08
- 发明人: Danny Y. Ngan , Randy C. John
- 申请人： Danny Y. Ngan , Randy C. John
- 申请人地址： TX Houston
- 专利权人： Shell Oil Company
- 当前专利权人： Shell Oil Company
- 当前专利权人地址： TX Houston
- 主分类号： C21D1/76
- IPC分类号： C21D1/76 ; C23C8/18
摘要：
A process for heat treatment of high temperature steels in which the steels are heated to temperatures of at least 1800.degree. F. in the presence of hydrogen gas, methane, hydrogen sulfide, and steam. Articles made by the process have a unique layer enriched in chromium oxide, and reactor components made from the treated steel may be used in a process for the pyrolysis of liquid and gaseous hydrocarbons to inhibit coking.
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