Method for producing high strength Cu-Ni-Sn alloy containing manganese

摘要

A high strength Cu-Ni-Sn alloy, comprising 3-25% Ni, 3-9% Sn, 0.05-1.5% Mn, balance Cu, is heated to a temperature of 800 DEG C. or above in a single-phase region. This heat treatment is followed by quenching and subsequent heating at a temperature range of 600 DEG -770 DEG C. in a two-phase region, followed by quenching and a finishing process with a ratio of 0-60%. Thereafter, the processed alloy is subjected to a final heat-treatment at a temperature of 350 DEG -500 DEG C.