发明名称 |
METHOD FOR CONTROLLING A SEGREGATION OF STEEL INGOTS BY PURIFICATION OF MOLTEN STEEL |
摘要 |
<p>A method for controlling A-shaped segregation of steel ingot. The method includes: 1) controlling a content of phosphorus in liquid steel at less than or equal to 0.005 wt. % upon tapping from an electric furnace, preventing steel slag from entering a ladle, controlling content of harmful elements at less than or equal to 100 ppm; and adding between 3 and 15 kg of calcium oxide and less than or equal to 0.5 kg of aluminum to each ton of the liquid steel; 2) pre-deoxidizing the liquid metal using vacuum carbon deoxidation; 3) de-sulfurizing, controlling content of oxygen, and controlling the content of sulfur in the liquid steel at less than or equal to 0.005 wt. %; and 4) performing vacuum degasification, controlling the total oxygen content at less than or equal to 15 ppm; and casting the steel in the presence of inert gas or in vacuum.</p> |
申请公布号 |
EP2876171(A1) |
申请公布日期 |
2015.05.27 |
申请号 |
EP20120878213 |
申请日期 |
2012.10.15 |
申请人 |
INSTITUTE OF METAL RESEARCH CHINESE ACADEMY OF SCIENCES |
发明人 |
LI, DIANZHONG;FU, PAIXIAN;LIU, HONGWEI;XIA, LIJUN;LI, YIYI |
分类号 |
C21C7/00;C21C7/06;C21C7/064;C21C7/072;C21C7/076;C21C7/10;C22C38/22;C22C38/40 |
主分类号 |
C21C7/00 |
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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