A method of manufacturing a gearbox for an automobile
一种制造方法、变速箱的技术，应用在带有齿的元件、含杀生剂的油漆、防污/水下涂料等方向，能够解决难以满足等问题，达到提高耐蚀性能、成分简单、提高耐候抗污性能的效果
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Embodiment 1
[0030] A gearbox for automobiles, the gearbox includes a lower box and an upper box, the lower box and the upper box are connected to form a gearbox cavity, and the inner surface of the upper box is coated with an alumina-based ceramic material layer, The inner surface of the lower box is coated with a zirconia-based ceramic material layer, and the outer surfaces of the upper box and the lower box are coated with organic silicon paint,
[0031] The upper box and the lower box are made of aluminum alloy, and the chemical composition of the aluminum alloy is (weight percentage): Sn: 13%, : Cu6%, Mg: 2%, Si: 1%, Ti: 0.8%, Mn 0.6%, Fe: 0.4%, Ni: 0.2%, Co: 0.08%, Cr: 0.06%, Ag: 0.05%, Y: 0.06%, Mo: 0.08-%, the balance is Al and unavoidable impurities;
[0032] The preparation method of the upper box and the lower box includes the following steps: according to the above-mentioned chemical composition of the aluminum alloy, the aluminum ingot is first added to the melting furnace, an...
Embodiment 2
[0038] A gearbox for automobiles, the gearbox includes a lower box and an upper box, the lower box and the upper box are connected to form a gearbox cavity, and the inner surface of the upper box is coated with an alumina-based ceramic material layer, The inner surface of the lower box is coated with a zirconia-based ceramic material layer, and the outer surfaces of the upper box and the lower box are coated with organic silicon paint,
[0039] The upper box and the lower box are made of aluminum alloy, and the chemical composition of the aluminum alloy is (weight percent): Sn: 14%, : Cu7%, Mg: 3%, Si: 2%, Ti: 0.9%, Mn 0.7%, Fe: 0.5%, Ni: 0.3%, Co: 0.09%, Cr: 0.07%, Ag: 0.06%, Y: 0.07%, Mo: 0.09%, and the balance is Al and unavoidable impurities;
[0040] The preparation method of the upper box and the lower box includes the following steps: according to the above-mentioned chemical composition of the aluminum alloy, the aluminum ingot is first added to the melting furnace, an...
Embodiment 3
[0046] A gearbox for automobiles, the gearbox includes a lower box and an upper box, the lower box and the upper box are connected to form a gearbox cavity, and the inner surface of the upper box is coated with an alumina-based ceramic material layer, The inner surface of the lower box is coated with a zirconia-based ceramic material layer, and the outer surfaces of the upper box and the lower box are coated with organic silicon paint,
[0047] The upper box and the lower box are made of aluminum alloy, and the chemical composition of the aluminum alloy is (weight percent): Sn: 13.5%, Cu6.5%, Mg: 2.5%, Si: 1.5%, Ti: 0.85%, Mn 0.65 ﹪, Fe: 0.45%, Ni: 0.25%, Co: 0.085%, Cr: 0.065%, Ag: 0.055%, Y: 0.065%, Mo: 0.085%, and the balance is Al and unavoidable impurities;
[0048]The preparation method of the upper box and the lower box includes the following steps: according to the above-mentioned chemical composition of the aluminum alloy, the aluminum ingot is first added to the melt...
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