Placa de superposición de carburo de cromo

Placa de superposición de carburo de cromo: Differences Between Hardfaced Plates and Other Wear-Resistant Steels

Chromium carbide overlay plate (placa 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, cemento, acero, y las industrias energéticas.

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

Tipo de material	Estructura	Característica principal
Chromium carbide overlay plate	Base de acero + welded carbide overlay layer	Composite structure
NM400 / NM500 wear steel	Alloyed quenched & acero templado	Homogeneous structure
AR400 / Acero ar500	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

Tipo de material	Main Wear Resistance Mechanism
Chromium carbide overlay plate	Hard carbide particles resist abrasion
NM400 / NM500 steel	High hardness matrix resists wear
acero AR	Dureza y tenacidad equilibradas

CCO plates rely on extremely hard chromium carbide particles (CDH 58–65), while wear steels rely on overall bulk hardness.

3. Comparación de dureza y rendimiento

Propiedad	Placa CCO	Acero resistente al desgaste (NM/AR)
Dureza superficial	CDH 58–65	HB 400–500
Resistencia al desgaste	Excellent in sliding abrasion	Good in impact + abrasión
Resistencia al impacto	Más bajo (brittle surface layer)	Higher toughness
Service life	Very long in abrasive conditions	Balanced in mixed conditions

4. Processing Difference

• placa CCO: Requires plasma or laser cutting due to hard surface layer
• Usar acero: Más fácil de cortar, doblar, y soldar
• placa CCO: May have controlled surface cracks to release stress
• Usar acero: No surface cracking is normal

5. Application Difference

Application Condition	Best Material Choice
High sliding abrasion	Chromium carbide overlay plate
Alto impacto + abrasión	NM400 / NM500 steel
Mixed working conditions	AR steel or hybrid solutions

6. Key Advantage of Chromium Carbide Overlay Plate

• Resistencia al desgaste extremadamente alta en ambientes abrasivos
• Larga vida útil in chutes, tolvas, y revestimientos
• Replaceable wear surface concept (base plate remains intact)
• Cost efficiency in long-term maintenance

7. Capacidad de suministro de placas de desgaste de Teda Ganghua

Como proveedor profesional de acero resistente al desgaste, Teda Ganghua provides chromium carbide overlay plates and other wear-resistant steel solutions tailored to different industrial conditions, incluida la minería, cemento, acero, and power generation industries.

Apoyamos el corte personalizado, fabricación, and full wear protection system design based on real operating environments.

Explore nuestros productos de acero resistente al desgaste aquí:
Placas de acero resistentes al desgaste

Conclusión

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.