Powder metallurgy friction pair for braking of heavy-load vehicle and preparation technology thereof

Abstract

The invention relates to a powder metallurgy friction pair for braking of a heavy-load vehicle and a preparation technology thereof. A static friction piece comprises, by weight, 60-70 parts of reduced iron powder, 12-18 parts of electrolytic copper powder, 2-4 parts of molybdenum disulfide powder, 1-3 parts of ferro-manganese alloy powder, 1-3 parts of electrolytic nickel powder, 3-5 parts of silicon dioxide powder and 6-10 parts of crystalline flake graphite powder. A kinetic friction piece comprises, by weight, 14-18 parts of the reduced iron powder, 40-60 parts of the electrolytic copper powder, 2-4 parts of the molybdenum disulfide powder, 4-6 parts of tin powder, 1-3 parts of ferro-chrome alloy powder, 2-4 parts of the ferro-manganese alloy powder, 1-3 parts of the electrolytic nickel powder, 1-3 parts of chromium powder, 1-3 parts of aluminum oxide powder, 4-7 parts of the silicon dioxide powder and 10-14 parts of the crystalline flake graphite powder. The preparation technology of the powder metallurgy friction pair for braking of the heavy-load vehicle includes the steps of production, sand blasting, reshaping and electroplating of a steel backing and the steps of compounding, mixing, chemical analysis on ingredient uniformity, prepressing shaping, pressure sintering, mechanical processing, product finishing and checking of the power materials. Known from an MM1000 test that the prepared powder metallurgy friction pair for the heavy-load vehicle has the advantages of excellent frictional wear resistance, stable braking performance, low energy consumption and wear rate, good material uniformity and heat-conducting performance and long service life, and the problems of a large breaking wear rate, short service life and the like resulted from severe decline of a high-temperature friction coefficient of an existing friction pair for the heavy-load vehicle are solved.

Description

technical field [0001] The invention belongs to the technical field of vehicle braking, and relates to a powder metallurgy friction pair for heavy-duty vehicle braking and a preparation process thereof. Background technique [0002] The braking performance of heavy-duty vehicles (such as tanks and armored vehicles) directly affects the use of vehicles. The braking performance of chariots can even determine the outcome of the battlefield and the course of the war. Traditional powder metallurgy friction pairs have been difficult to meet the requirements of braking. Require. The main types of heavy-duty vehicle friction pairs currently developed are: copper-based powder metallurgy friction pairs, iron-based powder metallurgy friction pairs, carbon / ceramic composite material friction pairs, etc. The main problems of the above products: powder metallurgy friction pairs When the high temperature is generated, the friction coefficient decays quickly, the friction pair wears too fa...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the above technical problems, the present invention provides a powder metallurgy friction pair (including dynamic friction plate and static friction plate) for heavy-duty vehicles and its preparation process, which solves the problems of unstable high-temperature friction coefficient, high Problems such as short life of friction pair and insufficient heat resistance limit

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