Beryllium copper alloy ring and method for producing same

A method for producing a beryllium copper alloy ring comprising:

• providing a columnar forged material made of a beryllium copper alloy;
• opening a hole from a center of an upper surface of the columnar forged material in a direction parallel to a central axis of the columnar forged material to make a ring intermediate product;
• performing ring forging on the ring intermediate product, thereby expanding the hole such that a reduction ratio of 63% or more is achieved to make a ring-forged product, wherein the reduction ratio is specified by the following expression:
• P=100×(T−t)/T, wherein P represents the reduction ratio (%), T represents a thickness (mm) of the ring intermediate product, and t represents a thickness (mm) of the ring-forged product;
• and
• performing a solution annealing and a precipitation hardening on the ring-forged product to make the beryllium copper alloy ring;
• wherein the ring forging is performed at a temperature of 530 to 780° C.;
• wherein the beryllium copper alloy further comprises Zr;
• and
• wherein the beryllium copper alloy ring has an average crystal grain size of 19.1 μm or less.