炭化クロム板

炭化クロム板 (としても知られています 炭化クロムオーバーレイプレート または CCO Plates) は 耐摩耗鋼板 made by welding a hard chromium carbide layer onto a mild steel or stainless steel base. The resulting composite plate combines the strength and toughness of the base metal と superior hardness and wear resistance of chromium carbide.

These plates are widely used in industries that require long-lasting protection against 摩耗, インパクト, and high-temperature wear.

1. Structure and Composition

Chromium carbide plates are typically produced by 水没したアーク溶接 または オープンアーク溶接, forming a metallurgical bond between the wear layer and the base plate.

Typical composition of wear layer (wt.%):

• クロム (Cr): 25–35%

• 炭素 (C): 4–6%

• 鉄 (fe): バランス

• Minor elements: ん, そして, 注意, モー (optional, depending on grade)

The surface contains a dense network of Cr₇C₃-type carbides, giving it extremely high hardness and wear resistance.

硬度: 58–65HRC (≈ 600–750 HV)

2. Standard Specifications and Sizes

Chromium carbide plates can be supplied in different base plate grades, overlay thicknesses, そして 寸法 according to usage.

切断, 曲げ, 掘削, and fabrication can be done with プラズマ切断 または ウォータージェット processes.

3. Product Grades and Types

Chromium carbide plates can be divided into several grades based on carbon and chromium content または 溶接工程:

4. 主な用途

Chromium carbide plates are designed for medium to severe wear environments and can extend equipment life 3–5回 compared with traditional steel.

Common application fields:

• 鉱業と採石業: 滝, ホッパー, 破砕機, とスクリーン

• セメント産業: clinker conveyors, separator blades, サイクロン

• 発電所: coal mills, 灰パイプライン, ファンブレード, ライナー

• 製鉄所: sinter plant liners, 移送シュート, mixing drums

• 農業 & 工事: ブルドーザーのブレード, loader buckets, ライナーを着用する

• Petrochemical & port industries: material handling and transport chutes

5. Advantages of Chromium Carbide Plates

• 高い耐摩耗性: Up to 5–10 times longer life than mild steel.

• Good Heat Resistance: Stable performance up to 800 ℃.

• 優れた溶接性: Base plate can be easily welded or fabricated.

• 費用対効果が高い: Reduced downtime and maintenance frequency.

• カスタマイズ可能: Plate size, 厚さ, and surface pattern can be tailored.

6. Typical Surface Patterns

To enhance material flow or reduce sticking, surface layers can be made smooth or patterned:

• Smooth surface (2+2, 3+3 type): For sliding wear.

• Ripple surface: For better impact resistance.

• Cross pattern (hardfacing weave): For heavy wear and slurry applications.

7. まとめ

炭化クロム板 offer a durable and economical solution for protecting industrial equipment against abrasive and erosive wear.