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.