随着我国国民经济的发展,各行各业对铜合金材料的要求越来越高,光靠国内现有的铜合金系列已不能满足生产和科学技术发展的需要,因此必须加紧开发新型铜合金材料。去年,上海铜厂鉴定了一种H59GD合金。它是一种含有Pb、Sn、Fe、Mn元素的六元黄铜合金,其热锻温度为600～780℃,热 With the development of national economy in our country, all walks of life have higher and higher requirements on copper alloy materials, and can no longer meet the needs of the development of production and science and technology due to the existing domestic series of copper alloys. Therefore, it is necessary to step up the development of new copper alloy materials . Last year, the Shanghai copper factory identified a H59GD alloy. It is a kind of six element brass alloy containing Pb, Sn, Fe and Mn elements. Its hot forging temperature is 600 ~ 780 ℃, hot