1. Improve the wear resistance and durability of the screw
When the rubber screw works in the extruder, it needs to withstand high temperature, high pressure, as well as the friction and shear of the material. The use of bimetallic alloys, especially those specially designed alloys, such as alloys containing elements such as Mo, Cr, Ni, etc., can significantly improve the hardness and wear resistance of the screw. When these alloys are nitrided, an extremely hard nitrided layer will be formed on their surface, which further enhances the wear resistance and durability of the screw and extends the service life of the screw.

2. Optimize the mechanical properties of the screw
Bimetallic alloys not only have excellent wear resistance, but also have good mechanical properties, such as high strength, high toughness and good fatigue resistance. The optimization of these properties allows the rubber screw to withstand greater loads and more complex working conditions in the extruder, improving the production efficiency and stability of the extruder.

3. Improve the corrosion resistance of the screw
In an extruder, the rubber screw may come into contact with various chemicals, such as plastic additives, lubricants, etc. These chemicals may cause corrosion to the screw and reduce its service life. Some elements in bimetal alloys, such as Cr, Ni, etc., have good corrosion resistance. After nitriding treatment, the corrosion resistance of these elements is further enhanced, making the screw better resistant to chemical attack.

4. Enhance the adaptability of the screw
The design of bimetallic alloys can be adapted and optimized according to different application requirements. For example, for screws that need to withstand high-temperature environments, you can choose bimetallic alloys with high heat resistance; for screws that need to withstand high-pressure environments, you can choose bimetallic alloys with high pressure resistance. This flexibility allows the rubber screw to be better adapted to different extruders and production needs.