Powder metallurgy wear-resistant automobile bearing and preparation method thereof

Abstract

The invention relates to a powder metallurgy wear-resistant automobile bearing. The powder metallurgy wear-resistant automobile bearing is prepared through material-mixing and forming-sintering aftersubstances are evenly mixed, the substances are specifically composed of the following components of, by weight, 2-3 parts of Cu powder, 82-95 parts of Fe powder, 1-2 parts of Al powder, 2-5 parts ofW powder, 0.6-1.5 parts of V powder, 3-5 parts of the sum of tetrabutyl titanate and titanium tetrachloride in a mixed solution of the tetrabutyl titanate and the titanium tetrachloride, 2-4 parts ofcolloidal graphite in a colloidal graphite solution and 3-5 parts of Mo powder, the colloidal graphite solution and the mixed solution of the tetrabutyl titanate and the titanium tetrachloride are mixed and then added into grinded pre-activated alloy powder drop by drop, and uniform mixing is conducted. According to the powder metallurgy wear-resistant automobile bearing, a mixture of graphite andtitanium dioxide is prepared by adopting the colloidal graphite and a titanium source precursor, then TiN powder is generated at a high temperature under reduction of the Al powder, so that the TiN powder is uniformly distributed in the alloy powder, and the wear resistance and the heat resistance of the automobile bearing are effectively improved.

Description

technical field [0001] The invention belongs to the field of powder metallurgy, and in particular relates to a powder metallurgy wear-resistant automobile bearing and a preparation method thereof. Background technique [0002] The main function of the bearing (hub bearing) is to bear weight and provide precise guidance for the rotation of the hub. It bears both axial load and radial load, and is a very important component. [0003] The bearing has two main functions: one is to keep the shock absorber rotating with the wheel when the vehicle is turning, so as to maintain the flexibility of steering; The flexible connection prevents the vibration from being transmitted to the body through the shock absorber due to uneven road surface when the car is running. [0004] Although the automobile bearing is a small part, it is closely related to the reliability, safety and comfort of the whole vehicle. Bearings have an important impact on the performance of the vehicle. In terms o...

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Problems solved by technology

Applying TiN powder to automobile bearings will effectively improve the wear resistance of automobile bearings, but there is a problem that TiN powder is easy to agglomerate in alloy powder. Therefore, how to evenly disperse TiN powder in alloy powder is currently to be solved. technical problem