Carbide Plate

あ Carbide Plate, としても知られています 硬化肉盛プレート または オーバーレイプレート, is a wear-resistant steel plate with a hard alloy layer welded onto a base metal (通常は軟鋼または低合金鋼).
The hardfacing layer determines the plate’s 硬度, 耐摩耗性, and temperature performance — making it the key factor for choosing the right product.

違う carbide materials are used depending on the working environment, from standard abrasion to extreme impact or high temperature.

1. Common Types of Hardfacing Layers

2. 炭化クロムオーバーレイ (CCO) – The Most Common Type

の chromium carbide layer is the most widely used overlay in wear plates.
It features:

• 硬度: 58–65HRC

• Carbide phase: Cr₇C₃

• Excellent wear resistance under dry sliding or fine particle abrasion

• Stable performance up to 600–800 °C

This type is ideal for 滝, ホッパー, ファンブレード, サイクロン, and coal pipelines.

3. Tungsten Carbide Overlay – For Extreme Wear

Tungsten carbide hardfacing offers the highest hardness (まで 75 HRC) among all overlay types.
It provides exceptional resistance to abrasion and erosion, even in slurry or sand-laden environments.

• Extremely low wear rate

• 用途 oil drilling tools, dredger components, and wear rings

• More costly, but lasts 3–5× longer than chromium carbide under the same conditions

4. Niobium and Vanadium Carbide Overlays – Balanced Performance

To improve the brittleness of standard chromium carbide overlays, NbC そして VC are added to enhance impact and crack resistance.
These “complex carbide” layers provide a balance of:

• High hardness

• Better impact resistance

• Good metallurgical bonding

• Extended wear life in dynamic conditions

Common in 鉱山機械, cement screws, 破砕機, and mixing blades.

5. Complex Alloy Carbide Overlays – Multi-Element Systems

Modern wear plates often use multi-alloy overlays combining Cr, 注意, モー, V, and W to achieve composite wear resistance.
They can handle environments involving:

• 滑り摩耗

• Impact wear

• High temperature (まで 850 ℃)

• Mild corrosion

These plates are the premium choice for severe service applications のような clinker coolers, crusher walls, and heavy-duty conveyors.

6. Base Metal Options

While the overlay layer defines wear performance, の 卑金属 構造的な強度を提供します.

7. まとめ