Piastra resistente all'abrasione
Abrasion resistant steel plates are essential in mining for protecting high-wear and high-impact components:
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Riduce i costi di manutenzione by prolonging equipment life
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Minimizes downtime in harsh conditions
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Optimizes operational efficiency with the correct grade selection
- Descrizione
Resistente all'abrasione (AR) steel plates are high-strength, wear-resistant steel plates designed to withstand extreme friction, impatto, e usura da scorrimento.
In the mining industry, equipment is constantly exposed to high-impact rocks, minerale, and abrasive materials, making AR steel a critical material for extending service life and reducing maintenance costs.
Key Properties Required in Mining Applications
Mining applications demand AR steel with a carefully balanced combination of hardness, tenacità, e saldabilità:
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Elevata durezza (360–600 HBW) → Protects surfaces from abrasive wear caused by rocks, sabbia, and ore.
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Buona tenacità → Absorbs impact energy from heavy material flow or machinery collisions.
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Through-Thickness Hardness → Ensures consistent wear resistance even as the surface layer erodes.
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Weldability and Fabrication Capability → Enables easy installation and repair in harsh mining environments.
Common AR Steel Grades Used in Mining
| Grado | Durezza (HBW) | Resistenza all'impatto (J, -40°C) | Typical Applications in Mining |
|---|---|---|---|
| AR400 / NM400 | 360–440 | ≥27 | Tramogge, cade, truck liners, conveyor troughs |
| AR450 / NM450 | 420–480 | ≥25 | Benne per escavatori, feeder plates, fodere del frantoio |
| AR500 / NM500 | 470–540 | ≥20 | Mascelle del frantoio, hammer plates, high-wear liners |
| AR600 / NM600 | 560–620 | ≥15 | Zone di forte abrasione, knife edges, rivestimenti d'impatto |
| Mn13 (Acciaio ad alto contenuto di manganese) | Work-hardens up to 500 HBW | Molto alto | Mascelle del frantoio, piastre d'impatto, rock-breaking equipment |
Typical Mining Applications
1. Crushers and Hoppers
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Gradi: AR450, AR500, Mn13
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Applicazione: Liner, tramogge, and crusher walls
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Beneficio: Protects equipment from abrasive rocks and ore, riduce i tempi di inattività, extends wear life.
2. Excavator and Loader Buckets
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Gradi: AR400, AR450
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Applicazione: Bucket liners and cutting edges
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Beneficio: Reduces wear from repeated contact with rocks and gravel while maintaining toughness.
3. Conveyor Systems
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Gradi: AR400, AR450
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Applicazione: Canali trasportatori, feeder plates
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Beneficio: Minimizes abrasion from constant movement of ore or coal.
4. Truck Liners and Chutes
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Gradi: AR400, AR500
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Applicazione: Letti per autocarri con cassone ribaltabile, scivoli di trasferimento
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Beneficio: Extends service life under sliding abrasion from heavy material loads.
5. Impact Areas
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Gradi: AR500, AR600, Mn13
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Applicazione: Hammer plates, rock-breaking surfaces
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Beneficio: Absorbs high-impact loads without cracking, self-hardens (Mn13) for extreme durability.
Selection Tips for Mining
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Sliding Abrasion Dominant: AR500–AR600 for maximum hardness
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Impatto + Abrasion: AR400–AR450 or Mn13 for better toughness
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Fabrication and Welding Required: AR360–AR400 for easier cutting and welding
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Extreme Service Life: Combine high-hardness liners with manganese impact plates in critical zones
