The invention relates to a formula of a
cutting blade for a hot
cutting casting piece and a
machining method. The formula comprises the following components of, by weight ratio, 20%-40% of chrome
corundum with
granularity 24 mesh, 5%-25% of
iridium-plating brown fused
alumina with
granularity 24 mesh, 5%-25% of
iridium-plating brown fused
alumina with
granularity 30 mesh, 5%-25% of
iridium-plating brown fused
alumina with granularity 36 mesh, 3.0%-5.5% of liquid phenolic resin, 7.5%-10.5% of
powder phenolic resin with granularity 200-300 mesh, 2.0%-5.0% of
potassium sulphate with granularity 150-200 mesh, 1.0%-3.0% of
pyrite powder with granularity 325-400 mesh, 3.0%-8.0% of
calcium sulfate whisker with granularity 80-150 mesh and 0.2%-0.8% of
carbon black with granularity 325-400 mesh. The formula of the
cutting blade for the hot cutting
casting piece and the
machining method have the advantages that the formula by using multiple materials in a
mixed mode mixed is adopted, the resin
grinding wheel cutting blade for the hot cutting
casting piece is developed through a specific hot-pressing technology, the high-temperature resistant performance is remarkable, the requirement for high-efficiency cutting
machining of casting workpieces with temperature above 600 DEG C can be met, the heat dissipation performance is good, the durability is improved by 5-6 times, the dust is small, the cutting speed is rapid, the efficiency is improved obviously, the
shock resistance and the side direction loading capacity are improved, and the safety performance is guaranteed.