Plaque de superposition de carbure de chrome
Chromium Carbide Overlay Plate and wear resistant steel plates are both designed for wear protection but serve different engineering needs. CCO plates provide extreme abrasion resistance due to their hard chromium carbide surface, making them ideal for high-wear, low-impact environments. Wear resistant steel plates, d'autre part, offer a more balanced combination of hardness and toughness, making them suitable for applications involving both impact and abrasion.
- Description
Plaque de superposition de carbure de chrome (Plaque CCO) is a composite wear-resistant material produced by welding a high-chromium carbide alloy layer onto a steel base plate. It is widely used in heavy wear environments such as mining, cimenteries, centrales électriques, et systèmes de manutention de matériaux en vrac.
A common technical question in industry applications is the difference between Chromium Carbide Overlay Plate and traditional wear-resistant steel plates.
Material Structure Difference
Plaque de superposition de carbure de chrome (Plaque CCO)
CCO plate is a bimetallic composite material:
- Couche supérieure: High-hardness chromium carbide alloy (superposition de soudure)
- Couche de base: Mild steel or low-carbon steel
Les deux couches sont liées métallurgiquement.
Plaque d'acier résistante à l'usure (Acier AR)
Acier résistant à l'usure (comme AR400, AR500, Série NM) est:
- UN single homogeneous alloy steel
- Hardness is achieved through quenching and tempering
- No separate overlay layer
Composition and Hardness Comparison
| Propriété | Plaque CCO | Acier résistant à l'usure |
|---|---|---|
| Type de matériau | Composite (recouvrir + base) | Homogeneous steel |
| Main Alloying Element | High Chromium + Carbone | Carbone + Manganèse + Bore |
| Dureté | 55–65 HRC (couche superficielle) | 360–550 HB |
| Structure | Hard surface + base dure | Uniform hardness throughout |
| Résistance à l'usure | Extrêmement élevé | Haut |
Mécanisme de résistance à l'usure
Plaque de superposition de carbure de chrome
The wear resistance comes from:
- Hard chromium carbide particles (Cr₇C₃, Cr₂₃C₆)
- Extremely hard surface layer
- Resistance to cutting, affûtage, et abrasion
Acier résistant à l'usure
La résistance à l'usure est obtenue grâce à:
- Martensitic microstructure
- Overall hardness of the entire plate
- Robustesse et résistance à l'usure équilibrées
Impact Resistance Comparison
| Propriété | Plaque CCO | Acier résistant à l'usure |
| Résistance aux chocs | Moyen | Haut |
| Résistance aux fissures | Lower under heavy impact | Mieux |
| Absorption des chocs | Base steel only | Whole plate supports load |
Wear resistant steel performs better in high-impact conditions, while CCO plate is optimized for high abrasion environments.
Service Life Performance
- Plaque CCO: Longer service life in severe abrasion conditions such as sliding wear and particle erosion
- Acier résistant à l'usure: More balanced performance in mixed impact and abrasion conditions
Typical Applications Comparison
Chromium Carbide Overlay Plate Applications
- Cement chutes and liners
- Mining conveyor systems
- Matériel de manutention du charbon
- Systèmes de cendres de centrales électriques
- Revêtements de concasseur
- Heavy abrasion transfer points
Wear Resistant Steel Applications
- Godets d'excavatrice
- Carrosseries de camions-bennes
- Lames de chargeur
- Structural wear components
- Mining equipment subjected to impact loads
Processing and Fabrication Difference
| Processus | Plaque CCO | Acier résistant à l'usure |
| Coupe | Difficile (couche de surface dure) | Plus facile |
| Soudage | Requires special procedure | Standard welding possible |
| Formation | Limited flexibility | Bonne formabilité |
| Usinage | Très difficile | Relatively easier |
