A kind of preparation method of lightweight aluminum-based brake disc
A brake disc and lightweight technology, applied in the field of brake discs, can solve the problems of increased weight of brake discs, and achieve the effect of improving wear resistance and buffering stress
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Embodiment 1
[0027] The first step is to pre-treat the surface of the aluminum alloy: the aluminum alloy disc hub is processed by grinding and cleaning in sequence. The grinding step is to use 400 mesh sandpaper to polish, and the cleaning step is to use acetone to clean;
[0028] The second step is to prepare the intermediate coating material: in parts by weight, mix 30 parts of silicon carbide powder, 12 parts of titanium oxide powder, and 7 parts of adhesive polyvinyl alcohol, and perform ball milling. The ball milling adopts a planetary ball mill, and the ball milling time is 2h, the rotation speed is 200r / min, and then sprayed on the surface of the disc hub by plasma spraying method. 8L / min, the feed rate is maintained at 10g / min, and the coating thickness obtained by spraying is 20μm;
[0029] The third step, the sintering treatment of the middle layer: sinter the disk hub obtained in the second step under a hydrogen atmosphere, so that titanium oxide is transformed into a simple tit...
Embodiment 2
[0034] The first step is to pre-treat the surface of the aluminum alloy: the aluminum alloy disc hub is processed by grinding and cleaning in sequence. The grinding step is to use 800 mesh sandpaper to polish, and the cleaning step is to use acetone to clean;
[0035] The second step is to prepare the intermediate coating material: in parts by weight, mix 40 parts of silicon carbide powder, 15 parts of titanium oxide powder, and 10 parts of binder polyvinyl alcohol, and perform ball milling. The ball milling adopts a planetary ball mill, and the ball milling time is 4h, the rotation speed is 550r / min, and then sprayed on the surface of the hub by plasma spraying method. The process parameters of plasma spraying are: the distance between the spray gun and the metal substrate is 80mm, the spraying power is 120kW, the flow rate of argon is 50L / min, the flow rate of hydrogen It is 12L / min, the feed rate is kept at 12g / min, and the coating thickness obtained by spraying is 30μm;
...
Embodiment 3
[0041] The first step is to pre-treat the surface of the aluminum alloy: the aluminum alloy disc hub is processed by grinding and cleaning in sequence. The grinding step is to use 600 mesh sandpaper to polish, and the cleaning step is to use acetone to clean;
[0042] The second step is to prepare the intermediate coating material: in parts by weight, mix 35 parts of silicon carbide powder, 13 parts of titanium oxide powder, and 8 parts of adhesive polyvinyl alcohol, and perform ball milling. The ball milling adopts a planetary ball mill, and the ball milling time is 3h, the rotation speed is 450r / min, and then sprayed on the surface of the disc hub by plasma spraying method. The process parameters of plasma spraying are: the distance between the spray gun and the metal substrate is 50mm, the spraying power is 70kW, the flow rate of argon is 30L / min, the flow rate of hydrogen is 9L / min, the feed rate is kept at 11g / min, and the coating thickness obtained by spraying is 24μm;
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Abstract
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