The hammer crusher is mostly used to crush limestone . When it is used to break the dolomite, the hardness of the dolomite is high, which causes the hammer to wear quickly, which seriously affects the rate of the hammer crusher . Red Star Machinery shared the research on the wear of the hammer crusher hammer and the hardness and characteristics of the dolomite. It was found that the hammer head can be broken to reduce the wear of the hammer by improving the hammerhead. Centrifugal hammer crusher, crushing its high efficiency, reliable operation, is widely used in metallurgy, mining and cement industries. Dolomite has a Mohs hardness of 3.8 and a high hardness. It is very urgent to study and design a new type of high-efficiency wear-resistant hammer.
The common hammer crusher hammer is made of 4Cr18Ni2Mo and has a hardness of HRC35. During the casting process, carbon chromium forms a wear-resistant structure in the steel matrix. Although this material has certain wear resistance, the coarseness of the microstructure of the microstructure results in low impact toughness and a certain crack on the substrate. Function, so in the operation process, when the hammer crusher tells the rotation, the hammer head and the working medium violently collide with each other, the hammer head is easily broken.
The hammer crusher breaks the material by causing the hammer to generate a large inertia by high-speed rotation. Different materials have different effects on the wear of the hammer. Since the hardness of dolomite is higher than that of limestone, after the dolomite is changed, the wear of the hammer is accelerated and the service life of the hammer is sharply reduced.
To improve the wear resistance of the hammer, it is necessary to increase its hardness. However, as the hardness increases, the impact toughness will decrease. This is a contradiction. Therefore, how to balance the hardness of the hammer and the good impact toughness is improved. The key to the wear resistance of the hammer.
According to the principle of bionics, Red Star machine experts combined with the working characteristics of the hammer crusher and the characteristics of dolomite, designed and manufactured a composite hammerhead, that is, the alloy with higher hardness is embedded in the matrix with higher toughness. The composite hammerhead should have a high toughness and hardness in the outer softness.
Steel hammer in material selection (e.g., 1045 steel) with high chromium cast iron (e.g. Cr20-28) organic compound, using the solid - liquid composite casting sand, high chromium cast iron high carbon ferrochrome, molybdenum, copper, Scrap steel and other ingredients, in the smelting process, the Cr, C, Mo and other components are optimally controlled to carry out intensive smelting.
Yantai Tianbing Construction Machinery Co., Ltd