Wear-resistant material for brake block of heavy duty automobile

Abstract

The invention discloses a wear-resistant material for a brake block of a heavy duty automobile. The wear-resistant material comprises raw materials as follows: bisphenol A novolac epoxy resin, diaminodiphenyl sulfone, mineral powder, a lubricant, a cross-linking agent, chloroprene rubber powder, aluminum oxide, cotton fiber, carbon fiber, aramid fiber, sisal fiber, antimonous oxide, graphite and calcium lignosulfonate. The components are compatible, so that the overall performance of the wear-resistant material is effectively guaranteed, the components can make up for defects in performance mutually and can have high performance due to mutual restriction functions, problems of existing brake blocks are solved, high-speed decline and high-temperature decline can be well prevented, and the wear-resistant material has advantages of better stability and long service life.

Description

technical field [0001] The invention relates to the field of automobile materials, in particular to a wear-resistant material for heavy-duty vehicle brake pads. Background technique [0002] Brake pads are also called brake pads or brake pads. In the braking system of a car, brake pads are the most critical safety parts and play a decisive role in the braking effect. Brake pads are generally composed of steel plates, bonded heat insulation layers and friction blocks. The friction block is composed of friction material and adhesive. When braking, the friction block is squeezed on the brake disc or brake drum to generate friction with it, so as to achieve the purpose of decelerating and braking the vehicle. It can be seen that the friction block determines the performance of the brake pad under high-speed and high-temperature braking conditions, and the friction material is an important part of the brake pad in the manufacturing process and use process. In the prior art, asb...

AI Technical Summary

Problems solved by technology

In the prior art, asbestos brake pads are mostly used as brake pad friction materials for vehicles. Every time a brake is applied, the brake pads will emit millions of asbestos fibers into the air, and the needle-shaped limit is easy Enter the lungs and stay there, causing irritation, which can eventually lead to the occurrence of lung cancer

But in addition to the health hazards, there is another important problem with asbestos brake pads

Because asbestos is heat-insulating, its thermal conductivity is particularly poor. After repeated use of the brakes, the heat will accumulate in the brake pads. After the brake pads become hot, their braking performance will change, and the same friction and braking force will be produced. More brakes will be required, and if the brake pads reach a certain level of heat, the brakes will fail

In addition, asbestos in asbestos brake pads is difficult to fully bond with other components in the brake pads, and it is easy to peel off, and it is not wear-resistant and has a short service life.

Therefore, resin-based materials have begun to replace asbestos as another commonly used wear-resistant material for brake pads. However, resin-based friction materials are prone to severe thermal decomposition when the operating temperature is high, causing a serious decline in friction and wear performance, thereby reducing the service life.

The existing brake pads still have a mismatch with the dual, resulting in resonance or poor friction stability between the disc and the brake pad, and the brake pad and the brake dual vary with the braking specific pressure, temperature, and speed, and the materials of the two sides adhere to each other noise problems

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