The ball mill bimetal high alloy composite wear-resistant lining plate is a new generation of patented product successfully developed by our company in collaboration with the Department of Materials Science and Engineering of Tsinghua University and the Institute of Structural Materials of the General Institute of Iron and Steel Research.
As we all know, high manganese steel has good toughness and the surface can be work hardened. However, when this material is used to make ball mill linings, it is prone to plastic deformation, cutting off the fixing screws, and collapse accidents. Moreover, due to the insignificant surface processing hardening during use, the anti-wear potential of high manganese steel cannot be exerted.
As a replacement product of high manganese steel lining plate, medium carbon, medium chromium multi-component alloy steel lining plate has a body structure mainly composed of martensite, with high initial hardness, but high hardness carbides The content is small, and the anti-wear performance is still limited. Its service life is only about twice that of high manganese steel lining plate.
The working surface of the bimetallic high-alloy composite wear-resistant lining plate is made of high-chromium alloy cast iron, and its metallographic structure is crystalline carbide M7C3 + secondary carbide + martensite + retained austenite. It has quite high hardness (HRC≥58) and sufficient toughness. The non-working surface is made of low carbon steel. Thermal composite technology is used to fuse high-chromium alloy cast iron and steel into a whole. The overall toughness of the composite lining plate is better, which appropriately solves the problem of having both hardness and toughness. Therefore, it is suitable for various types of ball mills of large, medium and small (Φ2500-Φ5500). The safe operation of Tangshan Iron and Steel's 550/880 extra large ball mill further proves the good toughness and sufficient reliability of the bimetal composite liner.
The bimetal high-alloy composite dovetail-type self-fixing wear-resistant lining plate (without bolts) completely solves the problem of slurry and powder leakage during the production process of the ball mill, reduces the noise, facilitates installation, and achieves zero Maintenance, civilized production is achieved, and new alloying and inoculation processes are adopted. According to the requirements of different working conditions and boundary materials of the lining plate, nickel, molybdenum, vanadium, titanium, copper and other alloys are added appropriately to make the hardness of the working surface higher, reaching HRC58-63. The non-working surface is changed to high-quality carbon steel, and the overall The toughness is better, reaching ak≥15J/cm2. It has a longer service life and is highly praised by users.
Due to the high hardness of the lining plate, it can be matched with high-hardness steel balls. Lining plates with different hardness can also be designed according to different working conditions to reduce the consumption of steel balls.
Because the lining plate has a long life, does not deform, and is constantly bolted, it reduces the amount of maintenance and the number of overhauls, reduces the labor intensity of workers, improves work efficiency, and reduces milling costs.
Over the past few years, it has been proven by the use of many manufacturers that the service life of the bimetallic high-alloy composite wear-resistant lining plates produced by our company is 3-4 times that of high manganese steel lining plates. It is a medium-carbon and medium-chromium wear-resistant lining plate. It is twice as long as the multi-component alloy steel lining plate. It is used for coal grinding and has a service life of up to 10 years. It is currently the lining plate with leading domestic technology content and the first physical quality.
The lining plates produced by our company have been used by many companies in non-ferrous metals, electric power, metallurgy, mining, building materials and other industries to crush iron ore, aluminum ore, copper ore, gold ore, limestone (SIO2), etc. Difficult to crush materials, safe and reliable operation, bringing considerable economic benefits to users.
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