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作为结构材料,ZL104合金得到了广泛的应用,这不仅因为它有很好的综合机械性能(经T_6处理的砂型试棒 σb=26kg/mm~2,σs=20kg/mm~2,δ=3％),而且具有十分良好的铸造性能(充型能力好、线收缩小、无热裂倾向),所以常用于制造大型、复杂、薄壁铸件(发动机的压缩机匣、承力框架、轴承机匣等等)。但在生产实际中,该合金常常由于塑性偏低给生产带来不少麻烦。只有认识了造成ZL104合金塑性偏低的原因,才能采取措施予以提高。
As a structural material, ZL104 alloy has been widely used, not only because of its good overall mechanical properties (Tb treated sand test bars σb = 26kg / mm ~ 2, σs = 20kg / mm ~ 2, δ = 3 %), But also has a very good casting performance (filling capacity is good, the line contraction is small, no tendency to crack), it is often used in the manufacture of large, complex, thin-walled castings (engine compressor casing, bearing frame, bearing machine Box, etc.). However, in actual production, the alloy often brings a lot of trouble due to low plasticity. Only to understand the causes of low plasticity ZL104 alloy in order to take measures to be improved.