PROBLEM TO BE SOLVED: To provide a Cu-Zr-Ti-based alloy strip combining excellent conductivity, strength, stress relaxation characteristics and forming workability and an electronic part which is produced by using the copper alloy strip and is suitable for large-current applications and heat release applications.SOLUTION: A Cu-Zr-Ti-based copper alloy strip comprises one or both of Zr and Ti in a combined content of 0.01-0.50 mass% and remaining copper and unavoidable impurities and has an absolute value of in-plane anisotropy (&Dgr;r) of a Lankford value, defined below, of 0.2 or smaller. &Dgr;r=(r+r-2×r)/2, where r, rand rare r values in directions having angles to the rolling direction of 0, 45 and 90 degrees, respectively.
展开▼
机译：要解决的问题：提供一种具有优异的导电性，强度，应力松弛特性和成形加工性的Cu-Zr-Ti基合金带材，以及一种使用该铜合金带材生产且适用于大电流应用的电子零件解决方案：一种基于Cu-Zr-Ti的铜合金带材，包含Zr和Ti中的一种或两种，合计含量为0.01-0.50质量％，并且剩余的铜和不可避免的杂质，且绝对值为Lankford值（定义如下）等于或小于0.2的平面各向异性（Δr）。 ＆ r ＝（r + r-2×r）/ 2，其中，r与与轧制方向成角度的角度分别为0、45和90度的方向上的r稀有r值。
展开▼
