COMPACTED GRAPHITE IRON ALLOY, RAIL VEHICLE BRAKE DISK AND CASTING METHOD

摘要

Provided are a compacted graphite iron alloy, a rail vehicle brake disk and a casting method for same, in the technical field of friction brake materials. The chemical composition of the compacted graphite iron alloy and the relative mass percentages of the components thereof are: C: 3.3% to 3.5％, Si: 2.3% to 2.5％, Mn: 0.4% to 0.7％, Cu: 0.6% to 1.0％, Mo: 0.2% to 0.6％, Ni: 0.6% to 1.0％, P≤0.07％, S≤0.02％, the remainder being Fe. The compacted graphite iron alloy of the present invention shows excellent thermal conductivity, strength, abrasion resistance, and similar physical properties. Rail vehicle brake discs prepared using the alloy are less prone to thermal cracking and thermal cracks are less likely to expand.