Chromium Carbide Overlay (CCO) Plates
Chromium Carbide Overlay Plates are essential in the mining industry for protecting equipment from severe abrasion and impact.
By selecting the appropriate overlay hardness, base steel, and thickness, mining operations can maximize equipment lifespan, reduce maintenance costs, and improve operational efficiency.
- Description
Chromium Carbide Overlay (CCO) Plates are bimetallic wear-resistant steel plates consisting of a hard chromium carbide surface layer welded onto a tough steel base.
They are designed to withstand extreme abrasion, impact, and high-stress wear conditions, making them ideal for the harsh environment of mining operations.
CCO plates provide long service life, reduce equipment downtime, and minimize maintenance costs in mining applications.
Key Properties for Mining Applications
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Overlay Hardness: 58–65 HRC ensures excellent sliding abrasion resistance
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Tough Steel Base: Absorbs impact, reduces cracking and deformation
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Through-Thickness Hardness: Maintains wear resistance as the overlay erodes
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Customizable Thickness: Overlay (3–20 mm) and base (6–50 mm) can be tailored to specific mining equipment
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Fabrication Capability: Can be cut, welded, or drilled for installation on mining machinery
Typical CCO Plate Grades for Mining
| Grade / Type | Overlay Hardness (HRC) | Base Steel | Overlay Thickness (mm) | Applications |
|---|---|---|---|---|
| CCO-1 | 58–60 | Q235 / mild steel | 3–6 | Light abrasion areas, chutes, hoppers |
| CCO-2 | 60–62 | Q235 / S355 | 6–8 | Feeders, conveyor liners, crusher plates |
| CCO-3 | 62–64 | NM400 / AR400 | 8–12 | High abrasion zones, bucket liners, impact areas |
| CCO-4 | 64–65 | AR450 / NM450 | 12–15 | Severe wear surfaces, mining equipment, slurry pipelines |
Mining Applications of Chromium Carbide Overlay Plates
1. Crusher Liners and Hammer Plates
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Grades: CCO-2, CCO-3, CCO-4
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Function: Protects crushers, impact hammers, and grinding mills from abrasive rocks and ore
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Benefit: Extends service life and reduces downtime
2. Hoppers and Chutes
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Grades: CCO-1, CCO-2, CCO-3
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Function: Line chutes and hoppers transporting abrasive materials like ore, coal, and sand
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Benefit: Reduces wear caused by sliding and impact abrasion
3. Conveyor Liners and Feeder Plates
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Grades: CCO-2, CCO-3
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Function: Protects conveyor systems from abrasion and impacts during material handling
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Benefit: Minimizes maintenance and prolongs equipment life
4. Mining Equipment Buckets and Scoops
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Grades: CCO-3, CCO-4
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Function: Bucket liners for loaders and excavators
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Benefit: Protects against heavy impact and sliding wear during digging and loading
5. Slurry and Material Handling Pipelines
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Grades: CCO-4
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Function: Line pipelines carrying ore slurry or abrasive minerals
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Benefit: Prevents erosion and ensures continuous flow without leaks
Advantages of Using CCO Plates in Mining
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Extreme Wear Resistance: Chromium carbide overlay ensures long-lasting protection
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Impact Toughness: Tough steel base absorbs shocks from heavy loads
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Customizable Design: Plates can be tailored for overlay thickness and dimensions to meet specific equipment needs
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Reduced Maintenance: Longer service life lowers replacement frequency and operational downtime
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Versatility: Can be used on crushers, hoppers, feeders, buckets, pipelines, and conveyors
