The invention discloses a composition
brake shoe for a
railway freight car, and a method for manufacturing the same. A friction piece of the composition
brake shoe for the
railway freight car is synthetised by using following materials by weight parts: 6-10 parts of
nitrile rubber, 2-8 parts of modified phenolic resin, 3-6 parts of
steel wool fibers, 9-16 parts of
sepiolite fibers, 2-16 parts of composite mineral fibers, 5-13 parts of
graphite, 0.4-2 parts of calcined
bauxite, 20-24 parts of
barium sulfate, 8-12 parts of
potassium feldspar powder, 10-20 parts of
iron powder, and 1-3 parts of additives. The friction piece of the composition
brake shoe is formed through the steps of dosing, banburying or mixing, crashing,
hot press molding and curing forming, and thermal
processing. The composition
brake shoe is capable of well satisfying various performance indexes requested in PRC (People's Republic of China) railway industrial standard TB / T2403-2010, and can be applied to railway freight cars traveling at the highest speed of 120km / h and
axle load of the composition
brake shoe is not greater than 25 tons; besides, the composition
brake shoe has stable friction properties and excellent friction resistance, and is low in attrition to wheels and low in braking
noise; and as a result, potential quality hazards ( such as brake shoe body breakage,
slag and block dropping,
metal inlaying and hot cracks) endangering traveling safety are fundamentally solved.