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将熔模精密铸造和预制型液态浸渗技术相结合,开发了一种制备连续(长)纤维增强铝基复合材料的加压凝固熔模精密铸造工艺.该工艺将增强纤维的放置和零件的蜡模制作相结合,可直接生产出高精度的近净形复合材料零件.选定了Sumitomo Chemical公司生产的AltexSN型γ-Al2O3纤维作为复合材料的增强体,并开发了适合加压凝固熔模精密铸造工艺条件的铝合金基体材料AlZn6Mg1Ag1.试验表明这种γ-Al2O3连续纤维增强铝合金复合材料对加压凝固熔模精密铸造工艺有较好的适应性,并有非常理想的强度性能,具有广阔的应用前景.热处理(T6)后复合材料沿纤维方向的抗拉强度σb,0°=1003MPa,垂直于纤维方向的抗拉强度σb,90°=220MPa.
In combination with investment casting and prefabricated liquid infiltration technology, a compression solidification investment casting process for preparing continuous (long) fiber reinforced aluminum matrix composites has been developed, which enhances fiber placement and component Wax mold making to produce high-precision near-net-shape composite parts directly.AltexSN-type γ-Al2O3 fiber produced by Sumitomo Chemical Co., Ltd. was selected as the reinforcing material of the composite material and a mold suitable for compression solidification was developed Precision casting process conditions AlZn6Mg1Ag1 aluminum alloy substrate material.The experiment shows that the γ-Al2O3 continuous fiber reinforced aluminum alloy composite material has good adaptability to the compression solidification investment casting process, and has very good strength properties, with The tensile strength σb, 0 ° = 1003MPa along the fiber direction after heat treatment (T6), tensile strength σb perpendicular to the fiber direction, 90 ° = 220MPa.