耐久性のある鋼板
Weld-overlay hard wearing steel plate combines 冶金的結合, 高硬度, and carbide reinforcement, making it one of the most reliable solutions for combating wear in heavy-duty industries. By integrating a strong base metal with a hard facing layer, it achieves the perfect balance between 強さ, 靭性, and surface durability — ideal for extending equipment life in demanding environments.
- 説明
あ hard wearing steel plate is a type of wear-resistant material designed to withstand severe abrasion, インパクト, そして侵食. Among various wear solutions, weld-overlay plates—also known as 炭化クロムオーバーレイ (CCO) プレート—are widely recognized for their superior performance in harsh industrial environments.
Why Weld-Overlay Materials Can Be Used as Wear-Resistant Steel
Weld-overlay materials are created by depositing a layer of hard alloy (such as chromium carbide or complex carbide) onto a steel base plate through a controlled welding process. これにより、 metallurgical bond between the two layers, giving the plate a unique combination of properties: a tough and ductile base for structural support, and an extremely hard surface for wear protection.
The overlay layer contains a high concentration of chromium and carbon, which react during welding to form 硬質炭化物 (Cr₇C₃) uniformly distributed in the microstructure. These carbides are harder than most abrasives, giving the surface exceptional wear resistance even under high-stress and sliding conditions.
Typical Properties of Hard Wearing Weld-Overlay Plates
| 財産 / 特徴 | 代表的な範囲 / 説明 | Benefit in Wear Applications |
|---|---|---|
| 表面硬度 | 58 – 65 HRC | Provides excellent resistance to sliding and gouging wear. |
| 合金組成 (Cr + Cコンテンツ) | 25 – 35% Cr, 4 – 6% C | Promotes formation of dense chromium carbides (Cr₇C₃). |
| ベースプレートの材質 | 軟鋼 (Q235 / ASTM A36) | Ensures good toughness and easy fabrication. |
| 接着タイプ | Metallurgical bond (肉盛溶接) | Prevents delamination under heavy impact or vibration. |
| Service Temperature | 最大600°C | Maintains hardness and stability at elevated temperatures. |
| 一般的なオーバーレイの厚さ | 3 – 10 mm | Adjustable according to the severity of the wear environment. |
Advantages of Weld-Overlay Hard Wearing Plates
-
耐用年数の延長: The hard overlay layer resists abrasion far longer than conventional AR steel.
-
Structural strength: The mild steel base plate allows easy cutting, 曲げ, and welding during fabrication.
-
Cost efficiency: Longer wear life means reduced maintenance frequency and lower downtime.
-
Custom adaptability: Overlay thickness and plate size can be tailored for specific working conditions.
-
Thermal and impact resistance: Suitable for applications involving high impact and moderate heat.
代表的な用途
-
鉱業と採石業: シュートライナー, 画面, crusher hammers
-
セメント産業: clinker handling, ファンブレード, separator housing
-
発電: coal mill components, ash conveyors
-
鉄鋼および鋳物工場: sinter plant chutes, blast furnace liners
