Automotive brake block with ionic type rare-earth residues as filling materials

Abstract

An automotive brake block with ionic type rare-earth residues as filling materials is characterized by comprising by weight, 10 to 15% of the ionic type rare-earth residues, 20 to 30% of mineral fibers, 10 to 15% of binding agents, 15 to 25% of graphite, 2 to 5% of high temperature binding agents, 1 to 3% of aramid reinforced fibers and 5 to 10% of friction increasing materials. Ultrasonic processing and mechanical activation are performed on particle surfaces after the ionic type rare-earth residues, the mineral fibers and graphite raw materials are uniformly mixed to enhance contact force between particles and then material mixing with the rest of the raw materials is performed to be solidified into the automotive brake block through compression forming and heat treatment. According to the automotive brake block with the ionic type rare-earth residues as the filling materials, the ionic type rare-earth residues are utilized to replace the traditional mineral filling materials, so that the produced brake block is stable in friction coefficient and good in high temperature performance, the abrasion rate is not affected but lower instead, the materials can be recycled, the recycling and utilization rate is high, the raw material sources are rich, and the costs are low.

Description

technical field [0001] The invention relates to an automobile brake pad, in particular to an automobile brake pad which uses southern ionic rare earth slag as a filler to completely replace mineral fillers. Background technique [0002] Brake pads are an important safety component of the car braking system. The quality of the brake pads directly affects the braking performance of the car, and is related to the safety of life and property of the car drivers and passengers. With the rapid development of automobile technology and the increase of vehicle speed and load, the requirements for brake pads are also getting higher and higher. Friction performance is the most important and critical performance of friction materials. The filler is dispersed in the friction material and forms asperities on the surface. When the friction temperature (including the bulk temperature of the filler particles where these protrusions are in contact with the metal) is below the decomposition t...

AI Technical Summary

Problems solved by technology

In addition, when the friction material is working, sometimes the temperature will reach above 300°C. No matter it is exposed to the air or when it is bonded with the dual material, oxidation and decomposition will occur. The decomposition products are benzene, toluene, cresol, aldehyde, etc. Low-molecular compounds such as methane, carbon monoxide, carbon dioxide and other gases, these low-molecular compounds can be turned into gas when heated, and become liquid when cooled, and together with methane, carbon monoxide, carbon dioxide and other gases form a liquid-gas boundary layer , so that the dry friction between the original friction material and the dual material becomes a mixed friction with boundary friction, liquid friction and semi-liquid friction, resulting in a decrease in the friction coefficient

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