Powder metallurgy brake flat and method of manufacturing the same

Abstract

The invention relates to a brake block for automobiles, in particular to a powder metallurgy brake block and its producing method. The brake block uses the following formula: copper 3-7%, graphite 11-15%, graphite graininess 11-15%, molybdenum disulfide 2-4%, lead oxide 3-5%, Al2O3 1-2%, brenstone 0-0.8%, Fe (base) 64-78%. Wherein, the middle coarse crystal in the graphite is -50 mesh and -80 mesh in 1:1, middle and fine crystal in the graphite is -50 mesh and -80 mesh and -200 mesh in 9:9:2. Better formula for the invention is: copper 3%, graphite 11%, graphite graininess 11%, molybdenum disulfide 2%, lead oxide 3%, Al2O3 1%, no brenstone and Fe 69%. The making method for the invention is: 1. mixing; 2. mold pressing; 3. sintering. The invention is safe, of long service life, resistant to wear, and is of good economy efficiency.

Description

technical field [0001] The invention relates to a brake pad for vehicles, in particular to a powder metallurgy brake pad and a preparation method thereof. Background technique [0002] With the development of science and technology, the braking safety requirements corresponding to the speed of the vehicle are getting higher and higher. Since the United States' "No. 105 Federal Vehicle Safety Standard" in 1975 stipulated strict braking distance requirements, my country has also formulated The corresponding automobile safety standards put forward higher requirements for automobile brake materials. In this case, traditional asbestos brake pads often cause brake failure due to burning and fragmentation. Since the Cancer Medicine Symposium confirmed that asbestos is a carcinogen that affects human health, some western industrial countries such as the United States, the United Kingdom, and the Federal Republic of Germany have set strict control standards for asbestos powder. In orde...

AI Technical Summary

Problems solved by technology

However, Fuxu admits that powder metallurgy automobile brake materials also have its shortcomings. One is the high cost of single payment. Although the service life of powder metallurgy automobile brake pads is 3-4 times that of asbestos, the price is also 1.5 -2 times, the one-time investment is high, which affects the popularization and promotion of products, especially the matching of products, and the second is that the wear of the pair is too large, especially when the strength and hardness of the pair material do not meet the requirements. In addition, the material formula Not only the price of the precious components has risen, but also the procurement is difficult, which affects the development of production. Therefore, it is urgent to develop new material formulas and strive to reduce costs under the premise of ensuring quality.

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