400 Brinell A Rockwell C
The wear resistance of 400 Brinell steel (~45–47 HRC) is a combination of elevata durezza, optimized microstructure, and strategic alloying. Elements like C, Cr, Mn, Mo, V, and W play critical roles in enhancing hardness and abrasion resistance. NM-series and BW-series wear-resistant plates exemplify this balance, delivering long-lasting performance and durability in demanding industrial applications.
- Descrizione
400 Durezza Brinell (HB) is roughly equivalent to 45–47HRC (Rockwell C), a level commonly used for high-performance wear-resistant steel plates. At this hardness, steel plates combine exceptional abrasion resistance with sufficient toughness, rendendoli ideali per minerario, costruzione, e applicazioni nell'industria pesante.
1. How Wear Resistance is Achieved in Wear-Resistant Steel Plates
IL wear strength of steel plates is primarily determined by:
-
Surface hardness
-
Raggiunto attraverso heat treatment, tempra, and tempering.
-
Elevata durezza (400 HB / ~45–47 HRC) reduces material loss during sliding, impatto, or abrasive contact.
-
-
Microstruttura
-
Fine distribuzione dei carburi or alloying phases in the steel matrix provides resistance to cutting, graffiare, and gouging.
-
Homogeneous carbide particles prevent localized wear and prolong service life.
-
-
Layered hardness (for hardfaced plates)
-
Wear-resistant plates often have a hard surface layer (Carbide overlay or NM/BW series) over a acciaio di base resistente.
-
The base supports the hard surface under impact loads, avoiding cracks and delamination.
-
2. Chemical Components That Increase Wear Strength
Specific elements in the steel composition are crucial for enhancing hardness and wear resistance:
| Elemento | Effect on Wear Strength |
|---|---|
| Carbonio (C) | Forms carbides, increases hardness, improves abrasion resistance |
| Cromo (Cr) | Enhances hardenability, forms Cr carbides for wear resistance, migliora la resistenza alla corrosione |
| Manganese (Mn) | Increases toughness, reduces brittleness, helps work-hardening in high-impact applications |
| Molibdeno (Mo) | Increases toughness at high hardness, improves thermal stability |
| Vanadium (V) | Forms fine carbides, refines grain structure, increases wear resistance |
| Tungsten (W) | Forms ultra-hard carbides, provides excellent abrasion resistance |
3. NM-Series and BW-Series Example
-
NM-series: Optimized for abrasive wear, high carbide content ensures long-lasting surface hardness.
-
BW-series: Uniform hardness throughout the thickness (~400 HB), adatto per heavy-impact and sliding wear conditions.
-
Both series utilize Cr, Mn, and C alloying to maximize wear resistance while retaining toughness.
4. Applicazioni di 400 HB / 45–47 HRC Wear-Resistant Plates
-
Estrazione: crusher jaws, rivestimenti di macinazione, fodera per secchi, tramogge
-
Costruzione: lame del bulldozer, excavator edges
-
Movimentazione dei materiali: fodere per trasportatori, cade, pompe per liquami
-
Macchinari pesanti: impact-resistant surfaces in industrial equipment
