Nm450鋼板
NM450 steel plate is a high-performance abrasion resistant steel with a hardness range of approximately 420–480 HBW. It offers improved wear resistance compared with NM400 while maintaining acceptable toughness and fabrication properties.
Compared with NM400, NM450 is better suited for more severe wear conditions, providing longer service life in mining, セメント, および重工業用途. しかし, NM400 remains preferred in higher-impact environments where toughness is more critical than hardness.
- 説明
NM450 steel plate is a high-strength abrasion resistant steel designed for medium to severe wear conditions. 鉱山機械に広く使用されています, 建設機械, セメント工場, and material handling systems where both abrasion and impact resistance are required.
NM450 belongs to the NM series wear-resistant steels, which are commonly used in industrial fabrication due to their balanced hardness, 靭性, and cost performance.
What Does “450” Mean in NM450 Steel?
The “450” refers to the approximate Brinell hardness level (HBW) of the steel.
NM450 hardness≈420 to 480 HBW\text{NM450 hardness} \約 420 \text{ に } 480\,HBW
This means NM450 is:
- Harder than NM400
- Designed for higher wear resistance
- Suitable for medium to heavy abrasion environments
Chemical Composition of NM450 Steel
NM450 is a quenched and tempered alloy steel. Its exact composition may vary slightly, but typically includes:
| 要素 | 関数 |
|---|---|
| 炭素 (C) | Increases hardness |
| マンガン (ん) | 靭性の向上 |
| クロム (Cr) | 耐摩耗性の向上 |
| ニッケル (で) | Improves impact strength |
| モリブデン (モー) | Increases hardness stability |
The balanced alloy design ensures both wear resistance and structural toughness.
Main Properties of NM450 Steel Plate
| 財産 | パフォーマンス |
|---|---|
| 硬度 | ~420–480 HBW |
| 耐摩耗性 | 高い |
| 耐衝撃性 | 良い |
| 靭性 | Medium–High |
| 溶接性 | 良い |
| 成形性 | 適度 |
| 耐用年数 | 3–4× carbon steel |
NM450 is designed for 摩耗性が高い + moderate impact environments.
NM450 vs NM400 Steel Plate Comparison
NM450 and NM400 are both widely used wear-resistant steels, but NM450 provides higher hardness and better wear resistance.
硬度と耐摩耗性
| 財産 | NM400 | NM450 |
|---|---|---|
| 硬度 (HBW) | ~370–430 | ~420–480 |
| 耐摩耗性 | 良い | より高い |
| 表面耐久性 | 中くらい | 強い |
主な違い:
NM450 offers significantly better wear resistance due to higher hardness.
Toughness and Impact Resistance
| 財産 | NM400 | NM450 |
|---|---|---|
| 靭性 | 高い | Medium–High |
| 耐衝撃性 | とても良い | 良い |
主な違い:
NM400 performs better in high-impact conditions, while NM450 focuses more on wear resistance.
製造と加工
| 財産 | NM400 | NM450 |
|---|---|---|
| 溶接性 | Easier | 良い |
| 切断 | Easier | Slightly harder |
| 成形性 | より良い | 適度 |
主な違い:
NM450 requires slightly more controlled processing due to higher hardness.
Service Life Comparison
| 状態 | NM400 | NM450 |
|---|---|---|
| Light wear | 素晴らしい | 素晴らしい |
| Medium wear | 良い | Very good |
| Heavy wear | 適度 | 良い |
主な違い:
NM450 provides longer service life in more abrasive environments.
Why NM450 Has Better Wear Resistance
1. Higher Surface Hardness
- Stronger resistance to abrasion
- Slower material loss in friction environments
2. Optimized Alloy Design
- Chromium and molybdenum improve wear stability
- Balanced carbon content ensures hardness without excessive brittleness
3. Heat-Treated Microstructure
- 微細なマルテンサイト組織
- Improved resistance to surface deformation
Common Applications of NM450 Steel Plate
鉱業
- 掘削機バケット
- クラッシャーライナー
- Ore chutes
- ホッパーライナー
セメント産業
- Grinding systems
- キルフィード装置
- Material transfer chutes
建設機械
- ローダーバケット
- ブルドーザーのブレード
- Wear-resistant structural parts
鉄鋼業
- 焼結工場設備
- コークス処理システム
- コンベヤー摩耗プレート
バルクマテリアルハンドリング
- トラックの荷台ライナー
- 貯蔵ホッパー
- フィードシュート
Advantages of NM450 Steel Plate
- Higher wear resistance than NM400
- 硬度と靱性のバランスが良い
- Suitable for medium to heavy abrasion conditions
- 良好な溶接性と加工性
- Long service life in industrial environments
Limitations Compared to NM400
- Slightly lower toughness
- More difficult machining
- Not ideal for extremely high-impact-only applications
- 保護コーティングがないと錆びる可能性があります
