The screw elements of an extruder are the core components of a twin-screw extruder, mainly responsible for material transportation, shearing, mixing, and plasticizing. Their performance directly affects the extrusion efficiency and product quality. Here is a detailed introduction to them:

Materials
• Nitrided steel: such as 38CrMoAlA, which improves mechanical properties and corrosion resistance through nitriding treatment, is a commonly used material for screw elements.
• High-speed tool steel: such as W6Mo5Cr4V2, with high hardness and wear resistance, is suitable for high-performance cutting tools and molds, and can also be used to manufacture screw elements.
• Stainless steel: such as SUS304, SUS316, etc., with good corrosion resistance, is often used in food processing, chemical industry, and other fields with high requirements for corrosion resistance.
• Nickel-based alloys: with excellent high-temperature performance, corrosion resistance, and strength, they are widely used in many industrial fields.
• Powder metallurgy materials: such as imported HIP powder metallurgy WR5, WR13, etc., with ultra-high corrosion resistance, high wear resistance, high torque, and crack resistance, can meet the needs of high-end extruder screw elements.

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