Premixed anti-friction granular bearing pad and its processing method

Abstract

The invention provides a premixed anti-friction granular bearing bush and a processing method thereof. The processing method includes the following steps: adding a preset amount of graphite particles with a target particle size to a metal solution, and using ultrasonic waves to add graphite particles The metal solution is processed to make the graphite particles evenly mixed in the metal solution; the uniformly mixed metal solution is continuously cast and rolled to form a metal sheet structure; the steel plate and the formed metal sheet structure are fixed into one, and stamped to form a bearing bush blank; Finishing the surface of the bearing bush blank to obtain the finished bearing bush. The processing method of the pre-mixed anti-friction particle type bearing pad of the present invention replaces the method of in-situ generation of particles by the method of pre-mixing anti-friction particles, avoiding the impact of alloy elements on the embedding, toughness and plasticity of the matrix material caused by the in-situ generation of particles. and other properties, and the graphite particles are directly embedded in the alloy, so that the bearing bush processed by this method has better bonding strength and dispersibility.

Description

technical field [0001] The invention relates to the technical field of auto parts, in particular to a premixed wear-reducing granular bearing pad and a processing method thereof. Background technique [0002] The bearing bush is an important part of the automobile engine. The bearing bush and the journal of the transmission shaft together constitute the surface of the friction pair, which can lubricate the surface of the friction pair, reduce friction, prevent seizure and transfer frictional heat. However, the current bearing bush, by alloying the base metal, generates in-situ hard particles in the base metal, so that the added alloying elements such as copper, in addition to forming the second phase hard particles, also have a part Dissolving in the matrix will bring uncertainty to the performance of the matrix. For example, copper, silicon, etc. will be dissolved in the matrix to form a solid solution, which will weaken the plasticity of the matrix and weaken the embedding...

AI Technical Summary

Problems solved by technology

However, the current bearing bush, by alloying the base metal, generates in-situ hard particles in the base metal, so that the added alloying elements such as copper, in addition to forming the second phase hard particles, also have a part Dissolving in the matrix will bring uncertainty to the performance of the matrix. For example, copper, silicon, etc. will be dissolved in the matrix to form a solid solution, which will weaken the plasticity of the matrix and weaken the embedding of the matrix.

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