- 説明
耐摩耗性 (AR) 鋼板 are high-strength, wear-resistant steel plates designed to withstand extreme friction, インパクト, そして滑り摩耗.
In the mining industry, equipment is constantly exposed to high-impact rocks, 鉱石, 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, 靭性, 溶接性:
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高硬度 (360–600 HBW) → Protects surfaces from abrasive wear caused by rocks, 砂, and ore.
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優れた靭性 → Absorbs impact energy from heavy material flow or machinery collisions.
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厚さ方向の硬度 → 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
| 学年 | 硬度 (HBW) | 衝撃靱性 (j, -40℃) | Typical Applications in Mining |
|---|---|---|---|
| AR400 / NM400 | 360–440 | ≥27 | ホッパー, 滝, truck liners, conveyor troughs |
| AR450 / NM450 | 420–480 | ≥25 | 掘削機バケット, feeder plates, クラッシャーライナー |
| AR500 / NM500 | 470–540 | 20以上 | クラッシャージョー, ハンマープレート, high-wear liners |
| AR600 / NM600 | 560–620 | ≥15 | 重度の摩耗ゾーン, knife edges, インパクトライナー |
| MN13 (高マンガン鋼) | Work-hardens up to 500 HBW | 非常に高い | クラッシャージョー, インパクトプレート, rock-breaking equipment |
Typical Mining Applications
1. Crushers and Hoppers
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グレード: AR450, AR500, MN13
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応用: ライナー, ホッパー, and crusher walls
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利点: Protects equipment from abrasive rocks and ore, ダウンタイムの削減, extends wear life.
2. Excavator and Loader Buckets
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グレード: AR400, AR450
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応用: Bucket liners and cutting edges
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利点: Reduces wear from repeated contact with rocks and gravel while maintaining toughness.
3. Conveyor Systems
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グレード: AR400, AR450
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応用: Conveyor troughs, feeder plates
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利点: Minimizes abrasion from constant movement of ore or coal.
4. Truck Liners and Chutes
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グレード: AR400, AR500
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応用: ダンプトラックの荷台, 移送シュート
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利点: Extends service life under sliding abrasion from heavy material loads.
5. Impact Areas
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グレード: AR500, AR600, MN13
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応用: Hammer plates, rock-breaking surfaces
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利点: 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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インパクト + 摩耗: 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
