These are the differences between cast impellers and forged impellers from the aspects of production materials, manufacturing process, performance characteristics and application occasions.
1. Production Materials
The production materials used for cast impellers are cast iron, cast steel and other metal materials. While forged impellers are made of forged steel, forged aluminum and other materials.
2. Manufacturing Process
The manufacturing process of cast impellers mainly includes mold making, smelting and pouring, and post-processing, while forged impellers require forging processing and post-processing.
3. Performance Characteristics
Cast impellers have lower strength, but can be produced in larger sizes, suitable for use in low-speed and low-temperature environments.
Forged impellers have higher strength, suitable for use in high-speed and high-temperature environments, and have better wear resistance and corrosion resistance.
4. Application Occasions
Cast impellers are mainly used in low-speed and low-temperature applications, such as impellers in fans, water pumps, etc.
Forged impellers are mainly used in high-speed and high-temperature applications, such as aerospace, automotive engines, and other fields. 
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