Free sharpener does bronze bar wire

摘要

[problem] strength is improved, not only can serve as an alternative to some of the free-cutting beryllium copper alloy wire rod, cold workability is also good, the desired machinability also to reduce the content of lead can be obtained, to provide a free sharpener does bronze bar wire. A Ni a 0.3 to 1.5% by weight, the Pb 0.1~0.7 weight%, the Sn 7.0~9.0% by weight, the P 0.03~0.35 weight % was achieved problems due free shaving but bronze bars material characterized by comprising the balance of Cu and inevitable impurities. .BACKGROUND