A process for the preparation of a copper alloy for a connecting piece and by the method available copper alloy

摘要

A process for the preparation of a copper alloy for a connecting piece, comprising the steps of:Melting of an alloy, the 23 – 28 w -% zn and 0,3 – 1,8 w -% sn, wherein the following equation (1) is met and the remainder copper and unavoidable impurities are $6,0\; \leqq \; 0,25X\; +\; y\; \leqq \; 8,5\; (1)$wherein x is the added amount of zn (w -%) and y is the added amount of sn (w -%) is,continuous casting of the melt, wherein the melt from the liquidus to 600°C. at a rate of at least 50°C. / min is cooled,the subsequent hot rolling of the resulting mold at an elevated temperature of 900°C or lower,Repeating of the method of the cold rolling and of the hardening in a temperature range from 300 to 650°C, until the hardened in such a rolled strip a crystal grain size of not more than 25 μm, andfurthermore, the incubator of a cold-rolling operation with a reduction in the thickness of at least 30% and the low temperature curing at 450°C. or..