发明授权
US06739383B1 Method for continuously casting between two rolls austenitic stainless steel strips with excellent surface quality and resulting strips
有权
在两个辊之间连续铸造的方法奥氏体不锈钢带具有优异的表面质量和所得的带材
- 专利标题: Method for continuously casting between two rolls austenitic stainless steel strips with excellent surface quality and resulting strips
- 专利标题(中): 在两个辊之间连续铸造的方法奥氏体不锈钢带具有优异的表面质量和所得的带材
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申请号: US09959210申请日: 2002-01-14
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公开(公告)号: US06739383B1公开(公告)日: 2004-05-25
- 发明人: Christian Marchionni , Frédéric Mazurier , Jean-Michel Damasse , Frédéric Descaves
- 申请人: Christian Marchionni , Frédéric Mazurier , Jean-Michel Damasse , Frédéric Descaves
- 主分类号: B22D1106
- IPC分类号: B22D1106
摘要:
The invention concerns a method for continuously casting an austenitic stainless steel strip with a thickness not more than 10 mm, directly from liquid metal, between two cooled horizontal rolls, characterised in that: said steel composition in weight proportions comprises: %C≦0.08%; %Si≦1; %P≦0.04; %Mn≦2; %Cr between 17 and 20; %Ni between 8 and 10.5; %S between 0.007 and 0.040; the rest being iron and the impurities resulting from preparation; the ratio Creq/Nieq ranges between 1.55 and 1.90 with: Creq(%)=%Cr+1.37 %Mo+1.5 %Si+2%Nb+3 %Ti; Nieq(%)=%Ni+0.31 %Mn+22 %C+14.2 %N+Cu; the surface of the rolls comprises contiguous dimples with more or less circular or elliptical cross-section, of diameter between 100 and 1500 &mgr;m and depth between 20 and 150 &mgr;m; the inerting gas surrounding the meniscus is a gas soluble in steel or a mixture of such gases, or consists of at least 50% by volume of such a gas or mixture of gases.
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