In the field of mining and industrial crushing, rotary crushers (such as TK 63-75 models) are one of the indispensable equipment. Its core fittings, the upper casing and the lower casing, are essential for the stable operation and efficient crushing of the equipment. This paper will deeply discuss the material selection, performance characteristics and how to optimize the service life of the upper and lower casing of TK 63-75 rotary crusher.
First, the role of the upper casing and the lower casing
TK 63-75 rotary crusher upper casing and lower casing are the key parts of the crusher, mainly play the role of support, guidance and protection. The upper casing is usually installed near the feed port of the crusher and is responsible for guiding the material into the crushing chamber and protecting the internal components from material impact. The lower casing is located at the bottom of the crusher, and its main function is to support the main structure of the crusher and ensure the smooth discharge of materials.Second, the importance of material selection
The material of the upper casing and the lower casing directly affects its wear resistance, impact resistance and service life. In mining and industrial crushing environments, these components need to withstand high levels of impact and wear. Therefore, choosing the right material is the key to ensuring the efficient operation of the equipment.
Third, common materials and their properties
1. High manganese steel
High manganese steel (such as Mn13, Mn18) is the traditional material of rotary crusher casing, with excellent toughness and work hardening ability. When the material is impacted, the surface gradually hardens, thus increasing the wear resistance. However, the initial hardness of high manganese steel is relatively low, usually around 210 HB, so there may be faster wear when crushing materials with higher hardness.
2. High chromium cast iron
High chromium cast iron is a very hard material, its hardness can reach HRC 58-68. This material has excellent wear resistance and is especially suitable for materials with high crushing hardness or strong abrasive properties. The wear resistance of high chromium cast iron mainly comes from its high hardness and good wear resistance, which can effectively resist the extrusion, grinding and impact of materials. However, the toughness of high chromium cast iron is relatively low, and brittle fracture may occur under high impact loads.
3. Alloying high manganese steel
In order to further improve the wear resistance of high manganese steel, alloying is often used in modern manufacturing. By adding appropriate alloying elements (such as chromium, molybdenum, etc.) to high manganese steel, the initial hardness and work hardening rate of high manganese steel can be significantly improved under the premise of maintaining good toughness. This alloyed high manganese steel performs well in crushing materials with higher hardness.
Fourth, suggestions for optimizing service life
1. Choose materials wisely
According to the nature of the crushing material and the working conditions of the crusher, the material of the casing should be reasonably selected. High manganese steel is an economical and reliable choice for high impact load and low material hardness. For materials with high crushing hardness or strong abrasive properties, high chromium cast iron or alloyed high manganese steel can provide better wear resistance.
2. Optimize the heat treatment process
Heat treatment has significant influence on the wear resistance of casing. For example, after quenching and tempering treatment, high manganese steel can obtain higher hardness and better toughness. In addition, a reasonable heat treatment process can improve the microstructure of the material and further improve its wear resistance.
3. Regular inspection and maintenance
Regular inspection of casing wear and timely replacement of severely worn parts can effectively extend the overall service life of the equipment. At the same time, reasonable lubrication and cleaning measures can also reduce wear and improve the operating efficiency of the equipment.
The upper and lower casing of the TK 63-75 rotary crusher are key components for the efficient operation of the equipment. Choosing the right material and optimizing its wear resistance is crucial to improving the service life of the equipment and reducing maintenance costs. High manganese steel, high chromium cast iron and alloyed high manganese steel are common material choices, and each has its advantages and disadvantages. Through reasonable selection of materials, optimization of heat treatment process and regular maintenance, the service life of the casing can be effectively improved to ensure the efficient operation of the equipment.
Post time: Apr-08-2025