Plaque d'usure en acier
The NM series wear plate steel provides a complete hardness range from NM360 to NM600, covering applications from light industrial wear to extreme mining conditions. Lower grades focus on toughness and versatility, while higher grades prioritize maximum abrasion resistance.
- Description
NM series wear plate steel is the most widely used Chinese wear resistant steel standard, designed for different levels of abrasion and impact conditions. The series mainly includes NM360, NM400, NM450, NM500, NM550, et NM600. Each grade is defined by its hardness level and application environment, allowing users to select the most suitable material based on wear intensity and service conditions.
NM Series Wear Plate Steel Comparison
| Grade | Dureté (HBW) | Niveau de résistance à l'usure | Dureté | Principales caractéristiques | Applications typiques |
|---|---|---|---|---|---|
| NM360 | 330–390 | Basique | Haut | Good balance of toughness and wear resistance | Light mining equipment, general machinery, pièces d'usure structurelles |
| NM400 | 380–460 | Moyen | Bien | Most widely used standard grade | Carrosseries de camions-bennes, seaux d'excavatrice, cement plant liners |
| NM450 | 430–500 | Haut | Moyen | Improved wear resistance and service life | Équipement minier lourd, high-impact wear areas |
| NM500 | 470–550 | Très élevé | Medium-low | Strong abrasion resistance, reduced deformation | Concasseurs, ore handling systems, doublures robustes |
| NM550 | 520–600 | Extrême | Inférieur | Ultra high hardness for severe wear | Concasseurs miniers, extreme abrasion conditions |
| NM600 | 570–650 | Maximum | Inférieur | Highest hardness in NM series | High-impact crushing systems, extreme wear environments |
Performance Trend in NM Series
- Hardness increases from NM360 to NM600
- Wear resistance improves gradually with higher grades
- Toughness decreases slightly as hardness increases
- Weldability becomes more demanding at higher grades
Key Selection Logic
- NM360–NM400 → Suitable for general industrial and light wear conditions
- NM450–NM500 → Standard choice for mining and construction machinery
- NM550–NM600 → Used for extreme abrasion and high-impact environments
Caractéristiques des microstructures
All NM series wear plates are produced through quenching and tempering processes, forming a martensitic structure. Cela garantit:
- Dureté de surface élevée
- Controlled toughness balance
- Stable wear resistance under impact and abrasion
- Longue durée de vie dans des environnements difficiles
