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公开(公告)号:US20150050180A1
公开(公告)日:2015-02-19
申请号:US14355866
申请日:2012-11-01
申请人: Outokumpu Oyj
发明人: Alexander Thulin , Jan Y. Jonsson , Mats Liljas , Rachel Pettersson , Jan-Olof Andersson , Staffan Hertzman
CPC分类号: C22C38/58 , C21D6/004 , C21D2211/005 , C22C38/001 , C22C38/02 , C22C38/04 , C22C38/42 , C22C38/44
摘要: The present invention relates to duplex ferritic austenitic stainless steel for the use chemical industry for nitric acid environments wherein good uniform corrosion resistance and high strength are required. The microstructure of the stainless steel has 35-65 volume % of ferrite, preferably 45-55 volume % of ferrite, the balance being austenite. The chemical composition contains less than 0.03 weight % carbon, less than 1 weight % silicon, less than 3 weight % manganese, 26-29.5 weight % chromium, 5-8.5 weight % nickel, 1-3 weight % molybdenum, 0.25-0.35 weight % nitrogen, 1-3 weight % copper, the rest being iron and inevitable impurities occurring in stainless steels.
摘要翻译: 本发明涉及使用化学工业用于需要良好的均匀耐腐蚀性和高强度的硝酸环境的双相铁素体奥氏体不锈钢。 不锈钢的微结构具有35-65体积%的铁素体,优选铁素体的45-55体积%,余量为奥氏体。 化学成分含有小于0.03重量%的碳,小于1重量%的硅,小于3重量%的锰,26-29.5重量%的铬,5-8.5重量%的镍,1-3重量%的钼,0.25-0.35重量% %氮,1-3重量%铜,其余为不锈钢中铁和不可避免的杂质。
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公开(公告)号:US09637813B2
公开(公告)日:2017-05-02
申请号:US14355866
申请日:2012-11-01
申请人: Outokumpu Oyj
发明人: Alexander Thulin , Jan Y. Jonsson , Mats Liljas , Rachel Pettersson , Jan-Olof Andersson , Staffan Hertzman
CPC分类号: C22C38/58 , C21D6/004 , C21D2211/005 , C22C38/001 , C22C38/02 , C22C38/04 , C22C38/42 , C22C38/44
摘要: The present invention relates to duplex ferritic austenitic stainless steel for the use chemical industry for nitric acid environments wherein good uniform corrosion resistance and high strength are required. The microstructure of the stainless steel has 35-65 volume % of ferrite, preferably 45-55 volume % of ferrite, the balance being austenite. The chemical composition contains less than 0.03 weight % carbon, less than 1 weight % silicon, less than 3 weight % manganese, 26-29.5 weight % chromium, 5-8.5 weight % nickel, 1-3 weight % molybdenum, 0.25-0.35 weight % nitrogen, 1-3 weight % copper, the rest being iron and inevitable impurities occurring in stainless steels.
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