Method for preparing brake block by calcium sulfate crystal whisker

Abstract

The invention relates to a method of using calcium sulfate whisker in the friction material field to prepare a brake block. The technical proposal of the invention consists of the following materials by weight: 5-18 portions of adhesive which is produced by employing modified phenolic resin; 20-40 portions of strengthening materials which are mixed by one or several of calcium sulfate whisker and one of aramid fiber, steel fiber, ceramic fiber and mineral fiber and glass fiber; 1-15 portions of grinding agent which is compounded by one or several of aluminum oxide , ferric oxide and magnesium oxide; 5-15 portions of lubricant which is compounded by one or several graphite, molybdenum disulfide and mica; and 10-30 portions of fillers which are compounded by one or several barium sulfate, potassium titanate and vermiculite powder. The brake block prepared by the method is able to lower the thermal fading of organics caused by thermal decomposition under high temperature, and has stable friction coefficient; when in use, the brake block has comfortable brake, being quiet, small abrasion and more than 70,000 kilometers of service life.

Description

technical field [0001] The invention relates to a method in which calcium sulfate whiskers are used for preparing brake pads in the field of friction materials. Background technique [0002] At present, the friction materials for automobiles in my country are dominated by semi-metals, which account for more than 70% of the total output. However, semi-metal friction materials have high product density, are easy to rust and scratch, and are prone to low-frequency noise during use. Disadvantages, can no longer meet people's higher and higher requirements for friction material products. Its upgraded ceramic-based friction material overcomes the shortcomings of semi-metallic formulations. The friction coefficient is stable, the braking comfort is good during use, and the service life is long. Become the development trend of friction materials. The conventional processing technology is as follows: mixing - hot pressing - heat treatment - grinding - painting - drying - installation ...

AI Technical Summary

Problems solved by technology

[0003] Calcium sulfate whisker of the present invention is used for the purpose of the method for preparing brake block: adopt calcium sulfate whisker in formula to form as reinforcing material and barium sulfate, zirconium silicate etc. The low-frequency noise problem of the existing brake pad braking, and overcome the shortcomings of the product such as easy to rust, easy to scratch the pair, unstable friction coefficient, etc., so that the brake pad has more superior performance