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公开(公告)号：EP1561834B1
公开(公告)日：2011-04-20
申请号：EP04748203.9
申请日：2004-08-03
发明人： OMURA, Tomohiko, Sumitomo Metal Industries, Ltd. , MATSUMOTO, Satoshi, Sumitomo Metal Industries, Ltd
CPC分类号： C21C7/064 , C21C7/0087 , C21C7/06 , C22C38/001 , C22C38/02 , C22C38/04 , C22C38/42 , C22C38/44
摘要： A duplex stainless steel which has a chemical composition, in mass %, that C: 0.03 % or less, Si: 0.01 to 2 %, Mn: 0.1 to 2 %, P: 0.05 % or less, S: 0.001 % or less, Al: 0.003 to 0.05 %, Ni: 4 to 12 %, Cr: 18 to 32 %, Mo: 0.2 to 5 %, N (nitrogen): 0.05 to 0.4 %, O (oxygen): 0.01 % or less, Ca: 0.0005 to 0.005 %, Mg: 0.0001 to 0.005 %, Cu: 0 to 2 %, B: 0 to 0.01 %, W: 0 to 4 %, and the balance: Fe and impurities, characterized in that it contains oxide type inclusions having a total content of Ca and Mg of 20 to 40 mass % and having a longer diameter of 7 μm or more in an amount of 10 pieces or less per 1 mm2 of the cross section perpendicular to the working direction, or further in that it contains oxide type inclusions having a content of S of 15 mass % or more and having a longer diameter of 1 μm or more in an amount of 10 pieces or less per 0.1 mm2 of the cross section perpendicular to the working direction. In particular, it is desirable that contents of Cu, B and W are 0.2 to 2 %, 0.001 to 0.01 % and 0.1 to 4 %, respectively.
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2.发明公开DUPLEX STAINLESS STEEL AND METHOD FOR PRODUCTION THEREOF 有权DUPLEX-EDELSTAHL UND HERSTELLUNGSVERFAHRENDAFÜR
公开(公告)号：EP1561834A1
公开(公告)日：2005-08-10
申请号：EP04748203.9
申请日：2004-08-03
发明人： OMURA, Tomohiko, Sumitomo Metal Industries, Ltd. , MATSUMOTO, Satoshi, Sumitomo Metal Industries, Ltd
CPC分类号： C21C7/064 , C21C7/0087 , C21C7/06 , C22C38/001 , C22C38/02 , C22C38/04 , C22C38/42 , C22C38/44
摘要： A duplex stainless steel containing C, Si, Mn, P, S, Al, Ni, Cr, Mo, N (nitrogen, O (oxygen),Ca, Mg, Cu, B, and W, and the balance Fe and impurities, where a number of oxide-based inclusions, which have a total content of Ca and Mg of 20 to 40 % by mass and also have a long diameter of not less than 7 µm, is not more than a 10 per 1 mm 2 of the cross section perpendicular to the working direction, or further, the number of oxide-based inclusions, which have a content of S of not less than 15% by mass and also have a long diameter of not less than 1 µm, is not more than 10 per 0.1 mm 2 of the cross section perpendicular to the working direction.. Particularly, the contents of Cu, B and W are desirably 0.2 to 2%, 0:001 to 0.01%, and 0.1 to 4% by mass, respectively.
摘要翻译： 含有C，Si，Mn，P，S，Al，Ni，Cr，Mo，N（氮，O（氧）），Ca，Mg，Cu，B和W的双相不锈钢，余量为Fe和杂质， 其中，总含量为20〜40质量％，长径不小于7μm的氧化物系夹杂物不超过每1mm 2的10个 >，或者另外，S含量为15质量％以上且长径不小于1μm的氧化物系夹杂物的数量， 与工作方向垂直的截面中每0.1mm 2不超过10个。特别地，Cu，B和W的含量优选为0.2〜2％，0：001〜0.01％，0.1〜4 质量分数
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