Compared to traditional screws, bimetallic screws offer several advantages:
1. Excellent Wear Life: This is the most prominent advantage of bimetallic screws. The hard alloy layer effectively resists wear from fillers (such as glass fiber, mineral powder), impurities, and the material itself, extending the screw's lifespan several times that of ordinary nitrided or tempered screws, significantly reducing replacement frequency and downtime.
2. Excellent Corrosion Resistance: When processing materials containing halogens, acidic components, or those prone to decomposition and corrosive gases (such as PVC, flame-retardant materials), the special alloy layer effectively resists chemical corrosion, protecting the substrate from damage and ensuring product purity and long-term screw integrity.
3. Good Self-Cleaning Properties: The high-hardness, smooth surface does not easily adhere to materials, reducing the risk of material degradation and carbonization, helping to maintain process stability and improve product quality consistency.
4. Considerable economic benefits: Although the initial investment cost of bimetallic screws is usually higher than that of ordinary screws, their extended service life means lower unit time wear costs. Indirect losses such as maintenance, downtime, and increased defect rates due to wear are also significantly reduced. In the long run, the overall economic benefits are outstanding.
