Wear-resistant jaw plates are crucial components in crushers, designed to withstand high abrasion and impact during the crushing of hard materials like rocks, ores, and concrete. Here’s a detailed overview:
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Key Features of Wear-Resistant Jaw Plates:
1. Material Composition:
– High Manganese Steel (Mn14, Mn18, Mn22): Offers excellent toughness and work-hardening properties under impact.
– High Chromium Cast Iron (Cr20, Cr26, Cr28): Provides superior abrasion resistance for highly abrasive materials.
– Bimetal/Bi-Metallic Jaw Plates: Combines a tough base layer (e.g., low-carbon steel) with a hard-facing wear-resistant layer (e.g., chromium carbide).
– TIC (Tungsten Carbide) Insert Plates: Enhanced wear resistance for extreme conditions.
2. Design Considerations:
– Tooth Profile: Optimized for different applications (e.g., flat for fine crushing, corrugated for coarse crushing).
– Symmetrical/Reversible Design: Extends service life by allowing rotation or swapping of worn sections.
– Custom Shapes: Tailored to fit specific crusher models (e.g., Metso Nordberg®, Sandvik®, Terex Pegson®).
3. Heat Treatment & Hardness:
– Quenching and tempering improve hardness (typically 200–400 HB for manganese steel; 55–65 HRC for chromium alloys).
– Work-hardening effect in manganese steel enhances durability under continuous impact.
4. Applications:
– Primary jaw crushers (for coarse crushing).
– Secondary/tertiary crushers (for finer output).
– Mining, quarrying, recycling (concrete, asphalt).
Factors Affecting Wear Resistance:
– Feed Material (abrasiveness, hardness, moisture content).
– Crusher Settings (CSS – Closed Side Setting, speed).
– Operational Practices (even feeding, avoiding metal contaminants).
Top Manufacturers & Brands:
– Metso Outotec
– Sandvik Rock Processing Solutions
– Terex Powerscreen
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*ESCO Corporation
– Mayang Crusher Parts (China OEM supplier)
Maintenance Tips to Extend Lifespan:
1. Regularly check jaw plate alignment and fastening bolts.
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