1. High strength and wear resistance
By adding appropriate amounts of alloy elements, such as chromium (Cr), molybdenum (Mo), etc., alloy steel can significantly improve the strength and hardness of the steel while maintaining good wear resistance. This is crucial for components such as screws and barrels that are subject to high pressures and friction during plastic processing.
For example, alloy steel materials such as 38CrMoAIA and 42CrMo can have excellent mechanical properties and wear resistance after appropriate heat treatment, meeting the requirements for use of bimetallic screws and barrels in harsh working environments.
2. Corrosion resistance
The alloying elements in alloy steel can also improve the corrosion resistance of the steel. During the plastic processing process, the screw and barrel may be exposed to various chemicals, such as plastic particles, additives, etc. High-quality alloy steel can effectively resist the corrosion of these chemicals and extend the service life of the equipment.
3. High temperature stability
During plastic processing, the screw and barrel need to withstand high temperature environments. Alloy steel materials usually have good high-temperature stability and can maintain their mechanical properties and dimensional stability at high temperatures to ensure the normal operation of equipment.
4. Long life and low maintenance cost
Bimetallic screws and barrels made of high-quality alloy steel materials usually have a longer service life due to their excellent wear resistance, corrosion resistance and high temperature stability. This not only reduces the frequency and cost of equipment replacement, but also reduces the difficulty and cost of maintenance work.
5. Processing performance
Alloy steel materials usually have good processing properties, such as cutting performance, welding performance, etc. This makes it easier to achieve precise dimensional control and complex shape processing when manufacturing bimetal screws and barrels.