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铝合金ZL104由于具有良好的铸造性能与机械性能,而获得广泛应用。近年来,随着我国航天事业的发展,对铝合金ZL104铸件的要求越来越高,主要有以下几个特点:外廓尺寸大;浇注金属重量大;在浇注位置上的高径比(即铸件的纵向尺寸与其横向尺寸之比)大;铸件致密度要求高;加工后表面质量要求高。对于具有上述特点的铝合金铸件,我们称之谓“高大型、高要求铝合金铸件”。 以前这种类型的铝合金铸件,经机械加工后在其加工面上经常出现大面积密集性孔
Aluminum alloy ZL104 is widely used due to its good casting and mechanical properties. In recent years, with the development of China’s aerospace industry, the requirements for aluminum alloy ZL104 castings are getting higher and higher, with the following main features: large external dimensions, heavy weight of pouring metal, high aspect ratio The ratio of the longitudinal dimension of the casting to its transverse dimension) is large; the density of the casting is high; the surface quality after processing is high. For the aluminum alloy castings with the above characteristics, we call them “high-profile, high-demand aluminum alloy castings”. Previously this type of aluminum alloy castings, machined surface often appear in the processing of large area intensive hole