- Description
Plaque de superposition de carbure de chrome: Differences Between Hardfaced Plates and Other Wear-Resistant Steels
Plaque de recouvrement en carbure de chrome (Plaque CCO) is a composite wear-resistant steel plate produced by welding a high-chromium carbide alloy layer onto a mild steel or low-alloy steel base plate. It is one of the most widely used hardfaced wear solutions in mining, ciment, acier, et industries électriques.
Compared with conventional wear-resistant steels such as NM400, NM500, or AR400 steel, chromium carbide overlay plate is fundamentally different in both structure and wear mechanism.
1. Structural Difference
| Type de matériau | Structure | Caractéristique principale |
|---|---|---|
| Plaque de recouvrement en carbure de chrome | Acier de base + welded carbide overlay layer | Composite structure |
| NM400 / NM500 wear steel | Alloyed quenched & acier trempé | Homogeneous structure |
| AR400 / AR500 ACIER | Heat-treated alloy steel | Uniform hardness throughout thickness |
The most important difference is that CCO plates have a two-layer structure, while traditional wear steels are single-material plates.
2. Wear Mechanism Difference
| Type de matériau | Main Wear Resistance Mechanism |
|---|---|
| Plaque de recouvrement en carbure de chrome | Hard carbide particles resist abrasion |
| NM400 / NM500 steel | High hardness matrix resists wear |
| Acier AR | Dureté et ténacité équilibrées |
CCO plates rely on extremely hard chromium carbide particles (HRC 58-65), while wear steels rely on overall bulk hardness.
3. Hardness and Performance Comparison
| Propriété | Plaque CCO | Acier résistant à l'usure (NM/AR) |
|---|---|---|
| Dureté superficielle | HRC 58-65 | HB 400-500 |
| Se résistance à l'usure | Excellent in sliding abrasion | Good in impact + abrasion |
| Résistance aux chocs | Inférieur (brittle surface layer) | Higher toughness |
| Durée de vie | Very long in abrasive conditions | Balanced in mixed conditions |
4. Processing Difference
- Plaque CCO: Requires plasma or laser cutting due to hard surface layer
- Usure de l'acier: Plus facile à couper, plier, et souder
- Plaque CCO: May have controlled surface cracks to release stress
- Usure de l'acier: No surface cracking is normal
5. Application Difference
| Conditions d'application | Best Material Choice |
|---|---|
| High sliding abrasion | Plaque de recouvrement en carbure de chrome |
| Fort impact + abrasion | NM400 / NM500 steel |
| Mixed working conditions | AR steel or hybrid solutions |
6. Key Advantage of Chromium Carbide Overlay Plate
- Résistance à l'usure extrêmement élevée dans des environnements abrasifs
- Longue durée de vie in chutes, trémies, et doublures
- Replaceable wear surface concept (base plate remains intact)
- Cost efficiency in long-term maintenance
7. Teda Ganghua Wear Plate Supply Capability
As a professional wear-resistant steel supplier, Teda Ganghua provides chromium carbide overlay plates and other wear-resistant steel solutions tailored to different industrial conditions, y compris l'exploitation minière, ciment, acier, et industries de production d’électricité.
We support customized cutting, fabrication, and full wear protection system design based on real operating environments.
Découvrez nos produits en acier résistant à l'usure ici:
Plaques d'acier résistantes à l'usure
Conclusion
Chromium carbide overlay plate differs from traditional wear-resistant steels because it uses a composite structure with a hard carbide overlay layer rather than a homogeneous steel body. This makes it far superior in abrasive wear conditions but less suitable for high-impact environments.
