发明名称 |
REFRACTORY SHAPE STEEL MATERIAL CONTAINING OXIDE AND PROCESS FOR PRODUCING ROLLED SHAPE STEEL OF SAID MATERIAL |
摘要 |
A cast strip for an H-shape steel having excellent fire resistance and toughness for use as a structural member for constructions and a shape steel having a flange, such as an I-shape steel, produced by accelerated cooling and controlled rolling of the cast slab, are produced in an in-line manner. After the regulation of the oxygen concentration of a molten steel by a predeoxidation treatment in a steel making process to form a steel having predetermined ingredients, the steel is subjected to final deoxidation with a minor amount of Al to provide a cast slab containing, in a dispersed state, compound oxide precipitate having a capability of forming intragranular ferrite. The stead is then subjected to a treatment comprising a combination of water cooling between rolling passes with accelerated cooling after hot rolling to attain refinement of the structure and a low alloy steel, thereby improving the strength at room temperature and at high temperature and the toughness.
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申请公布号 |
CA2106266(C) |
申请公布日期 |
1997.12.16 |
申请号 |
CA19932106266 |
申请日期 |
1993.09.15 |
申请人 |
NIPPON STEEL CORPORATION |
发明人 |
WATANABE, KAZUO;YAMAMOTO, KOHICHI;YOSHIDA, SUGURU |
分类号 |
C21C7/04;B22D11/00;B22D11/10;B22D11/108;B22D11/12;C21C7/00;C21C7/06;C21D8/00;C22C33/00;C22C38/00;C22C38/12;C22C38/14;(IPC1-7):C21C7/06;C21D7/13 |
主分类号 |
C21C7/04 |
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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