HIGH-STRENGTH PHOSPHOR, BRONZE FOR FORK-TYPE CONTACT, AND ITS MANUFACTURING METHOD

摘要

PROBLEM TO BE SOLVED: To provide high-strength phosphor bronze having high strength equal to that of beryllium copper and applicable to a fork-type contact as well. SOLUTION: Phosphorous bronze containing >=5 mass% Sn can be provided with >=1,000 MPa tensile strength by refining grain size after annealing and increasing draft at cold rolling.