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    • 50. 发明申请
    • COPPER ALLOY SHEET STRIP WITH SURFACE COATING LAYER EXCELLENT IN HEAT RESISTANCE
    • 铜合金板条表面涂层优良耐热性
    • US20170044651A1
    • 2017-02-16
    • US15118758
    • 2015-02-13
    • KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
    • Masahiro TSURUDaisuke HASHIMOTO
    • C22F1/08C22C9/02B22D7/00H01R13/03C25D3/30C25D3/20C25D3/12C22C9/06C25D3/38
    • C22F1/08B22D7/005C22C9/02C22C9/04C22C9/06C23C28/02C23C28/023C25D3/12C25D3/20C25D3/30C25D3/38C25D5/10C25D5/34C25D5/505H01R13/03H01R2201/26
    • Disclosed is a copper alloy sheet strip with a surface coating layer, including a copper alloy sheet strip, as a base material, consisting of Ni: 0.4 to 2.5% by mass, Sn: 0.4 to 2.5% by mass, and P: 0.027 to 0.15% by mass, a mass ratio Ni/P between the Ni content to the P content being less than 25, as well as any one of Fe: 0.0005 to 0.15% by mass, Zn: 1% by mass or less, Mn: 0.1% by mass or less, Si: 0.1% by mass or less, and Mg: 0.3% by mass or less, with the balance being Cu and inevitable impurities, and having a structure in which precipitates are dispersed in a copper alloy matrix, each precipitate having a diameter of 60 nm or less, 20 or more precipitates each having a diameter of 5 nm or more and 60 nm or less being observed in the visual field of 500 nm×500 nm; and the surface coating layer composed of a Ni layer, a Cu—Sn alloy layer, and a Sn layer formed on a surface of the copper alloy sheet strip in this order; wherein the Ni layer has an average thickness of 0.1 to 3.0 μm, the Cu—Sn alloy layer has an average thickness of 0.1 to 3.0 μm, and the Sn layer has an average thickness of 0.05 to 5.0 μm; wherein the Cu—Sn alloy layer is partially exposed on the outermost surface of the surface coating layer and a surface exposed area ratio thereof is in a range of 3 to 75%; and wherein the Cu—Sn alloy layer is composed of: 1) a η layer, or 2) a ε phase and a η phase, the ε phase existing between the Ni layer and the η phase, a ratio of the average thickness of the ε phase to the average thickness of the Cu—Sn alloy layer being 30% or less, and a ratio of the length of the ε phase to the length of the Ni layer being 50% or less.
    • 公开了一种具有表面被覆层的铜合金板条,其包括作为基材的铜合金板条,由Ni组成:0.4〜2.5质量%,Sn:0.4〜2.5质量%,P:0.027〜 0.15质量%,Ni含量与P含量之间的Ni / P的质量比小于25,Fe:0.0005〜0.15质量%,Zn:1质量%以下,Mn: 0.1质量%以下,Si:0.1质量%以下,Mg:0.3质量%以下,余量为Cu和不可避免的杂质,并且具有将析出物分散在铜合金基体中的结构, 每个沉淀物具有60nm或更小的直径,在500nm×500nm的视野中观察到直径为5nm以上且60nm以下的20个以上的析出物; 以及依次形成在铜合金板条的表面上的Ni层,Cu-Sn合金层和Sn层构成的表面被覆层。 其中Ni层的平均厚度为0.1〜3.0μm,Cu-Sn合金层的平均厚度为0.1〜3.0μm,Sn层的平均厚度为0.05〜5.0μm, 其中所述Cu-Sn合金层部分地暴露在所述表面涂层的最外表面上,并且其表面暴露面积比在3至75%的范围内; 并且其中所述Cu-Sn合金层由以下组成:1)η层,或2)ε相和η相,存在于所述Ni层和所述η相之间的ε相, ε相相对于Cu-Sn合金层的平均厚度为30%以下,ε相的长度与Ni层的长度的比例为50%以下。