Methods to improve hardness and wear resistance
Selection of suitable material and heat treatment process:
The hardness and wear resistance of copper bushing can be improved by selecting suitable copper alloy materials and adopting appropriate heat treatment processes. For example, quenching and tempering of tin bronze can significantly improve its hardness and wear resistance.
The performance of copper bushings can also be improved by adding some alloying elements, such as tin, lead and aluminum. These alloying elements can form a hard phase and improve the hardness and wear resistance of copper bushings.

Surface treatment:
Surface treatment of copper bushing is also an effective method to improve its hardness and wear resistance. For example, the use of electroplating, chemical plating, thermal spraying and other methods can form a layer of high hardness and good wear resistance coating on the surface of the copper sleeve.
You can also carry out surface quenching, carburizing and other treatments on the copper sleeve to improve the surface hardness, thus enhancing its wear resistance.
In short, the hardness and wear resistance of the outer copper sleeve of the crusher need to be reasonably matched according to the specific working conditions. When choosing the material of copper bushing and determining the hardness and wear resistance requirements, it is necessary to comprehensively consider the working environment of the crusher, material characteristics, cost and other factors, in order to ensure that the copper bushing can play a good performance in the crusher and have a long service life.