A kind of wear-resistant brake friction material and preparation method thereof

Abstract

The invention belongs to the field of brake friction materials and discloses a wear-resisting brake friction material and a preparation method thereof. The preparation method comprises the following steps: mixing the following components in parts by weight: 15 to 24 parts of basalt fibers, 5 to 16 parts of mullite, 2 to 6 parts of graphene, 10 to 18 parts of silicon carbide and 10 to 18 parts of monocrystalline silicon; grinding until the granularity is less than 50 meshes; then adding 0.5 to 5 parts of a silane coupling agent and stirring reacting to obtain silane modified mixed powder; thenuniformly mixing the silane modified mixed powder with 10 to 20 parts of phenolic resin and 4 to 12 parts of nitrile butadiene rubber; carrying out hot-pressing curing and molding to obtain the wear-resisting brake friction material. According to the wear-resisting brake friction material disclosed by the invention, the silane coupling agent is added and is used for modifying a reinforcing material and filler components; the silicon carbide and the mullite are added and are used as a reinforcing agent, so that the wear-resisting performance can be remarkably improved.

Description

technical field [0001] The invention belongs to the field of brake friction materials, and in particular relates to a wear-resistant brake friction material and a preparation method thereof. Background technique [0002] Brake friction material is a component material used in power machinery that relies on friction to perform braking and transmission functions. The usual brake friction material is a polymer ternary composite material, which is a physical and chemical complex. It is composed of polymer binder (resin and rubber), reinforcing fiber and friction performance regulator and other compounding ingredients, and is a product made through a series of production and processing. The friction material is characterized by good friction coefficient and wear resistance, as well as certain heat resistance and mechanical strength, which can meet the performance requirements of vehicle or mechanical transmission and braking. They are widely used in various construction machine...

AI Technical Summary

Problems solved by technology

However, the product still has the following disadvantages: the steel fiber is easy to rust, and it is easy to stick or damage the pair after corrosion, and the product strength is reduced after corrosion, and the wear is increased; the thermal conductivity is high, and it is easy to cause air resistance in the braking system at high temperature and cause friction. The sheet is separated from the steel plate; the hardness is high, which will damage the dual material, resulting in chatter and low-frequency braking noise; high density

The material of NAO-type brake pads has undergone several changes, and now NAO materials have effectively surpassed the performance of asbestos brake pads in many aspects, but NAO materials still use resin as the bonding phase. After high-temperature friction, the resin decomposes The relative increase leads to a sharp drop in the coefficient of friction and thermal decay of the material

At the same time, due to the large amount of thermal decomposition of the resin, its bonding effect is reduced, so the material wear is intensified, and the thermal oxidation wear is serious.

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