Preparation method of porous ceramic local reinforced composite material automobile brake pad
A porous ceramic and local reinforcement technology, applied in ceramic products, friction linings, mechanical equipment, etc., can solve the problems of poor wettability of ceramic particles and ceramic fibers, difficult control of the performance of material parts, and increased manufacturing costs. Low manufacturing cost, convenient operation, and the effect of improving bonding strength
Pending Publication Date: 2022-04-08
HARBIN INST OF TECH
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Problems solved by technology
However, the added ceramic particles and ceramic fibers have poor wettability and are prone to agglomeration, which makes the preparation more difficult and the properties of the material parts are not easy to control
If a special preparation process is used, higher requirements will be placed on the equipment, which will greatly increase the cost of production and manufacturing
Method used
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[0037] Take Al 2 o 3 Porous ceramics, organic foam is polyurethane foam as an example, according to figure 2 and 4 Process for preparing brake pads.
[0038] figure 2 The process flow chart for the preparation of porous ceramic preforms shows the control of the factors affecting the structure and performance of porous ceramic preforms such as material selection, slurry preparation, and high-temperature sintering during the preparation of porous ceramic preforms. Figure 4 It is a schematic diagram of the integrated forming process of porous ceramic locally reinforced composite automobile brake pads. According to the size and use requirements of automobile brake pads, a liquid die forging forming die for automobile brake pads is designed ( figure 1 ), and according to alloy smelting, mold preheating, liquid die forging and other processes, the forming preparation and continuous production of porous ceramic locally reinforced composite automobile brake pads can be realized...
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Abstract
The invention discloses a preparation method of an automobile brake pad made of a porous ceramic local reinforced composite material, belongs to the field of material processing engineering, and aims to solve the technical problem of continuous local reinforced integrated forming by taking the automobile brake pad as a typical part, so that the lightweight and high performance of the automobile brake pad are realized, the production cycle is shortened, and the material utilization rate is improved. The service life of the brake pad is prolonged. According to the preparation method, the large-size continuous porous ceramic preform is sintered and prepared by adopting an organic foam impregnation method, and typical parts such as the continuous porous ceramic local reinforced composite material automobile brake pad with high dimensional precision and good wear resistance are prepared by adopting a liquid die forging integrated forming technology and quantitative pouring. The method is applied to local reinforced composite material structural parts with high wear resistance requirements, such as automobile brake pads, automobile hubs, automobile pistons and the like.
Description
technical field [0001] The invention belongs to material processing engineering, and in particular relates to a method for preparing a porous ceramic locally reinforced composite automobile brake pad. Background technique [0002] Brake pads are a key part of a car's braking system. High-quality automotive brake pads need to have high tensile strength, wear resistance, heat resistance and vibration damping. From the development history of brake pads, the widely used brake pad materials mainly include ordinary cast iron, low alloy cast iron, ordinary cast steel, special alloy cast steel, low alloy forged steel and cast iron-cast steel (forged steel) composite materials. The material of cast iron brake pads is mainly gray cast iron, including four typical brands such as HT150, HT200, HT250 and HT300. Most of the existing automobile brake pads are made of cast iron, and they are developing towards forged steel materials. The strength of special forged steel brake pads is abou...
Claims
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IPC IPC(8): C04B38/10C04B35/10C04B35/622C04B35/64F16D69/02
Inventor 杜之明孙永根费岩晗李含宇
Owner HARBIN INST OF TECH