Jaw crusher cheek plate: material and wear resistance analysis

Jaw crusher cheek plate is one of the key wear parts of the crusher, its main role is to provide a strong, wear-resistant contact surface for the crusher to withstand the huge stress and wear generated during the crushing process. The material and wear resistance of the cheek plate directly affect the service life and working efficiency of the crusher. The properties and wear resistance of two common buccal materials, high manganese steel and high chromium cast iron, are discussed in this paper.

High manganese steel: traditional choice, toughness and wear resistance
High manganese steel (such as ZGMn13) is the traditional material of jaw crusher cheek plate, with excellent impact load resistance and cold work hardening characteristics. Its initial hardness is about 210 HB, although relatively low, but in the crushing process, due to the action of pressure, the surface will continue to harden, thereby improving the wear resistance. In addition, high manganese steel after water toughening treatment, can obtain a uniform metallographic structure, to avoid the natural phase change in use and lead to a decline in performance.
However, the wear resistance of high manganese steel is not perfect. Because of its low hardness, in the crushing process of some high-hardness materials, there may be faster wear. In addition, although the toughness of high manganese steel is better, its wear resistance depends on deformation hardening, so in the case of unreasonable structure of the crushing chamber or more material sliding, its wear advantages may not be fully played.

High chromium cast iron: the king of hardness, excellent wear resistance
High chromium cast iron is a very hard material, its hardness can reach HRC 58-68, much higher than high manganese steel, so it performs well in terms of wear resistance. 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. This material is especially suitable for crushing high hardness or strong abrasive materials, such as ore, rock and so on.
However, high-chromium cast iron has its limitations. Due to its extremely high hardness and relatively low toughness, brittle fracture may occur under high impact loads. Therefore, when selecting high chromium cast iron cheek plates, it is necessary to conduct a comprehensive assessment according to the actual nature of the crushing material and the working conditions of the crusher to ensure its reliability and economy during use.

Other factors affecting the wear resistance of cheek plate
In addition to the material itself, the wear resistance of the cheek plate is also affected by a variety of factors. For example, the heat treatment process has a significant effect on the wear resistance of high manganese steel. The results show that when the quenching temperature of high manganese steel reaches 900℃, complete martensitic structure can be obtained, which significantly improves its hardness and wear resistance. In addition, the structural design of the cheek plate also affects its wear resistance. For example, the use of different specifications of the crushing tooth design, can better adapt to the different crushing needs of the material in the crushing chamber, thus improving the service life of the cheek plate.

Select the right cheek material
The selection of suitable cheek material requires comprehensive consideration of the nature of the crushing material, the working conditions of the crusher and the cost factors. For high impact load and low material hardness conditions, high manganese steel cheek plate is an economical and reliable choice. For materials with higher crushing hardness or more abrasive properties, high chromium cast iron cheek plates can provide better wear resistance, although their cost is relatively high.

conclusion
The material and wear resistance of jaw crusher cheek plate are the key factors affecting the service life and working efficiency of jaw crusher. High manganese steel with its excellent toughness and cold work hardening characteristics, in the traditional crusher applications outstanding performance; High chromium cast iron, with its excellent hardness and wear resistance, has become the ideal choice to deal with high hardness material crushing. Through reasonable selection of materials and optimization of heat treatment process and structural design, the wear resistance of the cheek plate can be effectively improved, thus extending its service life, reducing equipment maintenance costs and improving production efficiency.