Steel wear refers to the gradual material loss of steel surfaces caused by mechanical action such as friction, abrasione, impatto, and sliding contact. In industrial environments like mining, produzione di cemento, impianti siderurgici, e movimentazione di materiali sfusi, wear is one of the main failure mechanisms of equipment.

To improve service life, acciai resistenti all'usura are specially designed to slow down or resist this material loss through optimized hardness, microstruttura, and alloy composition.

What Causes Steel Wear?

Steel wear mainly occurs through several mechanisms:

1. Usura abrasiva

Hard particles (sabbia, minerale, clinker) slide or roll across the steel surface and remove material.

• Common in mining and cement industries
• Main reason for rapid plate thinning

2. Impact Wear

Repeated high-energy impacts cause surface deformation and cracking.

• Benne per escavatori
• Fodere del frantoio
• Letti per autocarri con cassone ribaltabile

3. Adhesive Wear

Two metal surfaces stick together under pressure and then tear apart.

• Occurs in moving mechanical parts
• Leads to surface damage and material transfer

4. Erosive Wear

High-speed particles strike the steel surface and gradually erode it.

• Pneumatic conveying systems
• Coal and ash transport pipelines

Why Wear-Resistant Steel Works

Wear-resistant steel reduces material loss through three main principles:

1. Elevata durezza superficiale

Hardness is the first defense against wear.

• Hard surface resists cutting by abrasive particles
• Reduces penetration depth of external materials
• Slows down surface deformation

Typical wear steels range from:

• 360 HBW (AR400)
• Fino a 540+ HBW (AR500 and above)

2. Optimized Microstructure

Wear-resistant steels are engineered through heat treatment to form special structures:

• Martensitic structure (AR/NM steels)
• Fine grain structure for uniform hardness
• Carbide-rich phases in alloy steels

These structures improve resistance to cracking and surface damage.

3. Elementi di rinforzo della lega

Key elements improve wear performance:

• Carbonio (C): increases hardness
• Cromo (Cr): improves wear and oxidation resistance
• Manganese (Mn): improves toughness
• Molibdeno (Mo): stabilizes hardness under stress

These elements work together to balance hardness and toughness.

4. Work Hardening Effect (Special Steels)

Some steels, especially high manganese steel, become harder during use:

• Surface becomes stronger under impact
• Extends service life in high-impact environments
• Ideal for crusher and mining applications

How Wear-Resistant Steel Extends Service Life

Wear-resistant steel does not eliminate wear—it slows it down by:

• Reducing material removal rate
• Distributing impact energy
• Preventing deep surface damage
• Maintaining structural integrity over time

Ciò risulta:

• Longer equipment lifespan
• Reduced maintenance frequency
• Costo di sostituzione inferiore

Confronto: Wear-Resistant Steel vs Carbon Steel

Where Steel Wear Is Most Severe

Industria mineraria

• Ore crushing and transport
• Benne per escavatori
• Sistemi di tramogge e scivoli

Industria del cemento

• Grinding mills
• Kiln systems
• Material transfer equipment

Industria siderurgica

• Impianti di sinterizzazione
• Sistemi di movimentazione del coke
• Zone di usura del trasportatore

Power Plants

• Sistemi di movimentazione del carbone
• Ash discharge pipelines