COAL MINING PICKS
The coal pick is an important part of the shearer's broken rock and coal seam, and it is also one of the wearing parts in the coal mining machine. The performance of the coal pick is good for the production capacity of the coal mining machine, and the power consumption of the shearer. The smoothness of work and the service life of other parts have a great influence. [42CrMo steel] 42CrMo steel is ultra-high strength steel with high strength and toughness, good hardenability, no obvious tempering brittleness, high fatigue limit and multiple impact resistance after quenching and tempering, low temperature Good impact toughness. Tungsten carbide alloy is a cemented carbide with high hardness, wear resistance, good strength and toughness, heat resistance, corrosion resistance and other excellent properties.
Mining picks are subjected to high periodic compressive stress, shear stress and impact load when cutting coal rock. Although the hardness of coal is not very high, it often encounters hard minerals such as coal grindstone. During the cutting of coal rock Due to friction, impact will also cause the temperature of the pick to increase. The pick working under complex working conditions requires that the mining pick body should be wear-resistant and have good impact resistance. The pick is mainly composed of a pick shank, a pick head, and an alloy knife. Generally, a hard alloy knife head is embedded on a low alloy structural steel knife that is quenched and tempered.