Copper alloy strip material for electrical/electronic components

Abstract

An copper alloy strip material for electrical/electronic components according to the present invention is characterized in that such the copper alloy strip material for electrical/electronic components includes: Ni as between 1.5 mass % and 4.0 mass %; Si as between 0.3 mass % and 1.5 mass %; and the balance being Cu and unavoidable impurities, wherein a mean roughness Ra of a surface roughness is not larger than 0.3 μm regarding the strip in a direction as right angle to a direction of a rolling therefor, a maximum height Ry thereof is not higher than 3.0 μm regarding the same therein, and there is positioned a peak position regarding a frequency curve, that represents a concave component of the surface roughness and/or a convex component thereof, at the plus side (the side for the convex component) comparing to an average value of the curve for meaning the surface roughness.

1 . An copper alloy strip material for electrical/electronic components, including:
 Ni as between 1.5 mass % and 4.0 mass %;   Si as between 0.3 mass % and 1.5 mass %; and   a remaining percentage thereof to be comprised of Cu and an unavoidable impurity,   wherein a mean roughness Ra of a surface roughness is not larger than 0.3 μm regarding the strip in a direction as right angle to a direction of a rolling therefor,   a maximum height Ry thereof is not higher than 3.0 μm regarding the same therein, and   there is positioned a peak position regarding a frequency curve, that represents a concave component of the surface roughness and/or a convex component thereof, at the plus side (the side for the convex component) comparing to an average value of the curve for meaning the surface roughness.   
     
     
         2 . An copper alloy strip material for electrical/electronic components, including:
 Co as between 0.5 mass % and 2.0 mass %;   Ni and Co in total as between 1.5 mass % and 4.0 mass %;   Si as between 0.3 mass % and 1.5 mass %; and   a remaining percentage thereof to be comprised of Cu and an unavoidable impurity,   wherein a mean roughness Ra of a surface roughness is not larger than 3 μm regarding the strip in a direction as right angle to a direction of a rolling therefor,   a maximum height Ry thereof is not higher than 3 μm regarding the same therein, and   there is positioned a peak position regarding a frequency curve, that represents a concave component of the surface roughness and/or a convex component thereof, at the plus side (the side for the convex component) comparing to an average value of the curve for meaning the surface roughness.   
     
     
         3 . The copper alloy strip material for electrical/electronic components as defined in  claim 1 ,
 wherein the copper alloy includes at least any one of elements, that is selected from a group comprised of Sn, Zn, Cr and Mg, as between 0.005 mass % and 1.0 mass % in total.   
     
     
         4 . The copper alloy strip material for electrical/electronic components as defined in  claim 2 ,
 wherein the copper alloy includes at least any one of elements, that is selected from a group comprised of Sn, Zn, Cr and Mg, as between 0.005 mass % and 1.0 mass % in total.