High-Strength Titanium Copper Foil and Method for Producing Same

摘要

To provide a high-strength titanium-copper foil that is more suitable as a conductive spring material that can be used in electronic device components such as an autofocus camera module. A titanium copper foil containing Ti in an amount of 2.0 to 4.0 mass %, a remainder being copper and unavoidable impurities, said foil having a 0.2% yield strength of 1000 MPa or more and a spring limit value of 800 MPa or more in both directions parallel and perpendicular to a rolling direction, wherein no cracking occurs at bending radius/foil thickness=2 when a W bending test in conformity with JIS H3130: 2012 is performed at a width of 0.5 mm in a direction perpendicular to the rolling direction.

主权项

1. A titanium copper foil containing Ti in an amount of 2.0 mass % to 4.0 mass %, optionally containing one or more elements selected from the group consisting of Ag, B, Co, Fe, Mg, Mn, Mo, Ni, P, Si, Cr, and Zr in a total amount of 0 mass % to 1.0 mass %, a remainder being copper and unavoidable impurities, said foil having a 0.2% yield strength of 1000 MPa or more in both directions parallel and perpendicular to a rolling direction, and a spring limit value of 800 MPa or more in both directions parallel and perpendicular to the rolling direction, wherein no cracking occurs at bending radius/foil thickness=2 when a W bending test in conformity with JIS H3130: 2012 is performed at a width of 0.5 mm in a direction perpendicular to the rolling direction.