Abstract With the extensive application of large-scale mining machinery in the construction of coal mines, tunnel shields, trench excavation, road paving and channel dredging, picks have received much attention as a key tool for cutting rock formations. Today, Sifangda Xiaobian analyzes the diamond picks for you...
With the extensive application of large-scale mining machinery in the field of mining, such as coal mining, tunnel shield, trench excavation, road paving and channel dredging, picks have received attention as a key tool for cutting rock formations. Today, Sifangda Xiaobian will analyze the current situation and future development direction of diamond picks in China. The main performance indicator of the pick is wear resistance, and in order to significantly improve its wear resistance, the material composition of the pick must be changed. As we all know, diamond is the material with the highest hardness. The polycrystalline diamond compact is a combination of a cutting layer composed of numerous tiny diamond particles and a binder and a hard alloy substrate layer sintered at high temperature and high pressure. It has high strength and high strength. Hardness, high wear resistance, impact resistance and good self-sharpness, these excellent properties enable it to be applied to the mining of coal seams and rock formations, replacing cemented carbide.
At present, almost all of the domestic market is hard alloy picks, and the manufacturers of alloy picks have reached hundreds of large coal mines with their own picking production plants. In the high-end picking, import or joint ventures occupy most of the market.
With the expansion of coal mining scale and the eagerness for coal mining efficiency, the difficulty of coal mining is further increased, the stratum is more complicated, and the demand for new high-wear composite picks is more urgent.
In view of this, if the polycrystalline diamond composite picks for coal mines with high wear resistance can be developed, on the one hand, the tunneling efficiency can be improved, and on the other hand, suitable picking products can be provided according to the characteristics and performance requirements of the picks required for coal mining. To improve the technical content of coal mine machinery and equipment and promote the scientific and technological progress of China's coal mine machinery parts.
The tetragonal polycrystalline diamond pick overcomes the limitation of the hard alloy pick in the excavation of the hard rock. Due to the insufficient wear resistance of the cemented carbide and the slowing of the footage, the polycrystalline diamond compact is used instead of the hard alloy. The tooth head greatly improves the wear resistance of the pick, reduces the frequency of replacing the pick, has excellent drilling efficiency, greatly improves the uniform productivity, and is widely used.
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