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公开(公告)号：US20200149179A1
公开(公告)日：2020-05-14
申请号：US16619234
申请日：2018-06-05
Applicant: JFE STEEL CORPORATION
Inventor： Yusuke NAKAGAWA , Takeshi SUZUKI , Mikito SUTO , Katsumi KOJIMA , Yuya BABA , Hanyou SOU , Yoichiro YAMANAKA , Shunsuke TOKUI
Abstract: A steel sheet for cans which exhibits excellent weldability; and a production method therefore include the surface of a steel sheet in order from the steel sheet side, a chromium metal layer and a hydrous chromium oxide layer. The deposited amount of the chromium metal layer is 50-200 mg/m2. The deposited amount of the hydrous chromium oxide layer in terms of chromium is 3-30 mg/m2. The chromium metal layer includes: a base part having a thickness of 7.0 nm or higher; and granular protrusions which are on the base part, have a maximum grain size of 200 nm or lower, and have a number density per unit area of at least 30 per μm2.
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公开(公告)号：US20210324532A1
公开(公告)日：2021-10-21
申请号：US17271967
申请日：2019-06-07
Applicant: JFE STEEL CORPORATION
Inventor： Yusuke NAKAGAWA , Hanyou SOU , Yoichiro YAMANAKA
Abstract: A steel sheet for can making and methods for manufacturing the same. The steel sheet includes, in order from a steel sheet side, an iron-nickel diffusion layer, a metallic chromium layer, and a chromium oxide layer. The iron-nickel diffusion layer has a nickel coating weight of 50 mg/m2 to 500 mg/m2 per surface of the steel sheet and a thickness of 0.060 μm to 0.500 μm per surface of the steel sheet. The metallic chromium layer includes a flat-like metallic chromium sublayer and a granular metallic chromium sublayer placed on a surface of the flat-like metallic chromium sublayer. The total chromium coating weight of both sublayers per surface of the steel sheet is 60 mg/m2 to 200 mg/m2. The chromium oxide layer has a chromium coating weight 3 mg/m2 to 10 mg/m2 per surface of the steel sheet in terms of metallic chromium.
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