Piastra in acciaio con superficie dura
Hardfaced steel plates come in multiple types, compreso AR, NM, BW, composite overlays, and high-manganese steel, each tailored to specific wear and impact conditions. Selecting the right type ensures massima resistenza all'abrasione, durabilità, e lunga durata for mining, costruzione, e applicazioni industriali.
- Descrizione
Hardfaced steel plates are widely used in industries where abrasione, impatto, e usura da scorrimento occur. These plates feature a hard surface layer applied by welding or alloy overlay, enhancing durability while maintaining a tough steel substrate.
1. Common Types of Hardfaced Steel Plates
UN. AR (Resistente all'abrasione) Steel Plates
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Descrizione: Quenched and tempered steel with high hardness (typically 400–500 HB).
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Caratteristiche: Excellent balance of hardness and impact toughness.
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Applicazioni: Mascelle del frantoio, lame del bulldozer, excavator edges, piastre di usura.
b. NM-Series Wear-Resistant Plates
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Descrizione: Alloyed steel with optimized Cr, Mn, and C content.
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Caratteristiche: High resistance to combined sliding and impact wear.
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Applicazioni: Attrezzature minerarie, tramogge, rivestimenti di macinazione, cade.
C. BW-Series Wear-Resistant Plates
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Descrizione: Specialized steel with uniform hardness throughout the thickness.
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Caratteristiche: Exceptional sliding wear resistance E dimensional stability.
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Applicazioni: Fodere per trasportatori, heavy-duty chutes, industrial wear surfaces.
D. Composite Hardfaced Plates
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Descrizione: Steel substrate with welded carbide overlay or hardfacing layer.
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Caratteristiche: Localized ultra-hard surface for high abrasion zones while keeping substrate tough.
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Applicazioni: Fodere del frantoio, pompe per liquami, pale del miscelatore, fodera per secchi.
e. High-Manganese (Hadfield) Steel Plates
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Descrizione: Steel with ~12–14% manganese that work-hardens under impact.
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Caratteristiche: Becomes harder during use, resistant to high-impact wear.
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Applicazioni: Mining hoppers, crusher jaws, denti di secchio.
2. Key Differences Among Types
| Tipo | Durezza superficiale | Resistenza all'ambiente | Best Use |
|---|---|---|---|
| AR Steel | 400–500 HB | Medio | General wear plates and earthmoving equipment |
| NM-Series | 400 HB | Alto | Sliding + usura da impatto, frantoi, tramogge |
| BW-Series | 400 HB | Medio-Alto | Usura scorrevole, trasportatori, cade |
| Composite Hardfaced | 500+ HB (sovrapposizione) | Alto | Localized extreme wear areas |
| High-Manganese | Work-hardens in use | Molto alto | Impact-heavy applications, minerario |
3. Applications of Hardfaced Steel Plates
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Estrazione mineraria ed estrattiva: fodere del frantoio, fodera per secchi, tramogge, mulini macinatori
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Macchine edili: lame del bulldozer, excavator edges, earthmoving components
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Movimentazione dei materiali: conveyor belts, cade, tramogge industriali
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Heavy industry equipment: pompe per liquami, pale del miscelatore, impact surfaces
