Preparation method for laser cladding ceramic composite coating on surface of brake disc
A technology of laser cladding and ceramic compounding, which is applied in the direction of coating and metal material coating technology, and can solve the problems of ceramic particle agglomeration and so on
Active Publication Date: 2021-10-22
UNIV OF JINAN
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Problems solved by technology
[0009] The present invention describes in detail the preparation method of an iron-based brake disc that requires high wear resistance and reliability, long service life and moderate manufacturing cost in a special working environment. Ceramic particles are evenly distributed in the braking area of the brake disc surface to solve the agglomeration of ceramic particles
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[0034] The present invention is described in detail in conjunction with a specific manufacturing process.
[0035] The first step is to select an iron-based brake disc, and first turn and mill the integrally cast commercially-available iron-based brake disc (or a severely worn brake disc), that is, mill the surface layer and reserve 1-2mm Coating space, and then polish the surface to remove surface dirt and oxides.
[0036] The second step is to configure cladding powder. In the cladding powder, the mass fraction of each element is: C 2.4%, Ni 16%, Cr 12%, B 6%, Si 5.6%, W 5%, Al 10%, Co 15%, and the balance is Fe. The powder is weighed according to this ratio, and then the mixed powder is ball milled and dried to make it fully mixed and ready for use and testing. Wherein, in the present embodiment, the mixing adopts a mechanical mixing method, that is, utilizes a planetary ball mill to carry out. In this process, the ball-to-material ratio is 1:15, and the ball mill is 6 ho...
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Abstract
The invention discloses a preparation method for a laser cladding ceramic composite coating on the surface of a brake disc. The preparation method comprises the steps that the surface layers on two sides of the iron-based brake disc are milled to form coating spaces, cladding powder is cladded on the surface of the brake disc to form a cladding layer, the cladding layer is punched by using a laser shock peening technology, then filling powder is evenly laid on the surface of the cladding layer, and in the laying process, an electromagnetic vibration technology is utilized to assist the filling powder in being injected into laser drill holes; and finally, after filling of the filling powder is completed, the whole brake disc is put into a hot-pressing sintering furnace to be sintered, and the brake disc is taken out after sintering. According to the preparation method, a ceramic particle reinforced phase is dispersed and distributed in the coating to reinforce the performance of the brake disc; and the preparation method is not only suitable for additive manufacturing of the brake disc, but also suitable for additive remanufacturing repair of the brake disc which is seriously abraded.
Description
technical field [0001] The invention relates to the technical field of wear-resisting and enhanced manufacturing of the surface layer of cast iron brake discs, specifically a method for preparing an iron-based-ceramic particle coating on the surface layer of the brake disc. Background technique [0002] Brake discs are one of the most important safety components in a car. The rotating brake disc and the brake pads rub against each other to generate a braking force, thereby decelerating or stopping the vehicle. Usually, the service life of the brake disc is 50,000 to 100,000 kilometers. If the brake disc is severely worn, the gap between the expected braking distance and the actual braking distance will be too large, and even cause traffic accidents. The standard for replacing the brake disc is that both sides of the brake disc wear 1-2mm. In the course of the use of the car, it is indispensable to cause the wear of the brake disc, and the wear will inevitably affect its br...
Claims
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IPC IPC(8): C23C24/10
CPCC23C24/106
Inventor 时晓宇王守仁王高琦温道胜杨学锋薛成龙张建鹏刘文龙孙秀怀潘超
Owner UNIV OF JINAN