Placa de desgaste de sobreposição de carboneto de cromo
- Descrição
Placa de desgaste de sobreposição de carboneto de cromo: Surface Characteristics of Hardfaced Steel Plate
Chromium carbide overlay wear plate (Placa CCO) is a composite steel plate produced by depositing a high-chromium carbide alloy layer onto a carbon steel or low-alloy steel base. Its performance is defined primarily by its surface layer characteristics, which directly determine wear resistance and service life.
Comparado com placas de aço comuns, the surface of CCO plates has a completely different microstructure and mechanical behavior.
1. Dureza superficial extremamente alta
| Material | Dureza superficial |
|---|---|
| Chromium carbide overlay layer | CDH 58–65 |
| Aço resistente ao desgaste (NM400/NM500) | MP 400–500 |
| Ordinary carbon steel | HB 120–200 |
The high hardness comes from large amounts of primary and eutectic chromium carbide particles embedded in the weld matrix.
2. Visible Surface Cracking Pattern (Stress Relief Cracks)
A unique feature of CCO plates is the presence of controlled micro-cracks on the surface.
- These cracks are normal and intentional
- They help release internal welding stress
- They do not affect wear performance
This is a key visual difference from traditional steel plates.
3. Carbide-Rich Microstructure
| Componente | Função |
|---|---|
| Carbonetos de cromo (CR7C3, Cr23C6) | Main wear-resistant phase |
| Iron-based matrix | Supports carbide structure |
| Alloy additives (C, Mn, N.º, Mo) | Improve hardness and stability |
The surface is essentially a “carbide armor layer” designed for extreme abrasion resistance.
4. Excellent Abrasion Resistance Surface
- Strong resistance to sliding abrasion
- High durability against fine particle erosion
- Stable performance in dry wear environments
This makes it ideal for coal, cimento, areia, minério, e sistemas de manuseio de materiais a granel.
5. Smooth but Extremely Hard Surface Texture
Although very hard, the surface is relatively smooth due to controlled welding and finishing processes.
- Reduces material sticking
- Improves flow in chutes and hoppers
- Minimizes frictional resistance
6. Bimetallic Surface-Bond Structure
| Camada | Surface Function |
|---|---|
| Camada de sobreposição | Provides wear resistance |
| Fusion zone | Metallurgical bonding layer |
| Base steel | Provides toughness and strength |
The surface layer is firmly bonded to the base plate through metallurgical fusion, not mechanical attachment.
7. Teda Ganghua Chromium Carbide Plate Supply Capability
Como fornecedor profissional de aço resistente ao desgaste, Teda Ganghua provides high-quality chromium carbide overlay wear plates with stable surface hardness, uniform carbide distribution, and reliable bonding performance for mining, cimento, aço, e indústrias de energia.
Apoiamos corte personalizado, fabricação, and wear system design based on different industrial conditions.
Explore nossos produtos de aço resistentes ao desgaste aqui:
Placa de sobreposição de carboneto de cromo
Conclusão
The surface of chromium carbide overlay wear plate is defined by ultra-high hardness, carbide-rich microstructure, controlled stress cracks, and excellent abrasion resistance. These characteristics make it one of the most effective solutions for severe wear environments.
