Placa superpuesta resistente a la abrasión

Abrasion Resistant Overlay Plate is a composite wear-resistant steel product manufactured by depositing a high-hardness alloy layer onto a carbon steel or low-alloy steel base through welding overlay technology. Es muy utilizado en minería., cemento, generación de energía, plantas siderúrgicas, and bulk material handling systems where severe abrasive conditions occur.

The key value of this material lies in its exceptional ability to resist surface material loss caused by friction, impacto, y erosión de partículas.

Wear Resistance Principle

The abrasion resistance of overlay plate is achieved through a combination of hard alloy phases and a tough supporting base.

1. Refuerzo de carburo duro

The overlay layer contains high levels of chromium and carbon, which form extremely hard carbide phases such as:

• Cr₇C₃
• Cr₂₃C₆

These carbide particles act as rigid barriers that resist cutting and grinding from abrasive materials.

2. Alta dureza superficial

The wear-resistant layer typically achieves:

• 55–65 HRC hardness
• High microhardness in carbide-rich zones

This significantly reduces surface material removal during friction and impact.

3. Dual-Layer Structure Support

The structure consists of:

• Hard overlay layer (resistencia al desgaste)
• Tough base steel (impact absorption)

The base plate prevents cracking and deformation under mechanical load, while the overlay resists surface wear.

4. Controlled Microstructure

The weld overlay process produces a controlled distribution of carbides within a metallic matrix, asegurando:

• Uniform wear resistance
• Stable mechanical performance
• Reduced localized failure

Tipos de resistencia al desgaste

Abrasion Resistant Overlay Plate is designed to resist multiple wear mechanisms:

• Abrasión deslizante: caused by continuous material movement across the surface
• Abrasión por impacto: caused by falling or striking materials
• Erosive wear: caused by high-speed particle flow
• Gouging wear: caused by large particle scraping

Comparación de rendimiento

Propiedad	Placa superpuesta	Standard Carbon Steel	Acero resistente al desgaste
Dureza superficial	muy alto	Bajo	Medio-alto
Resistencia a la abrasión	Excelente	Pobre	Bien
Resistencia al impacto	Medio	Alto	Alto
Vida útil	Very Long	Corto	Largo

Key Factors Affecting Wear Performance

Composición de aleación

Higher chromium and carbon content increase carbide formation and improve wear resistance.

Grosor de superposición

Thicker wear layers provide longer service life under severe abrasion conditions.

Carbide Distribution

Uniform carbide dispersion ensures consistent wear performance across the surface.

Welding Process Control

Heat input and cooling rate affect hardness, crack resistance, and microstructure stability.

Aplicaciones industriales típicas

Abrasion Resistant Overlay Plates are widely used in:

• Revestimientos para equipos de minería
• Tolvas y tolvas para plantas de cemento
• Sistemas de manipulación de carbón
• Sistemas de cenizas para centrales eléctricas.
• Steel mill conveyors
• Crusher and screening equipment
• Cucharones de excavadora y camiones volquete
• Sistemas de transferencia de material a granel

Ventajas en uso industrial

• Extremely high resistance to abrasive wear
• Larga vida útil en condiciones duras
• Reducción de mantenimiento y tiempo de inactividad
• Composición de superposición personalizable
• Fuerte unión metalúrgica con placa base.