高クロム鋳鉄複合材

Wear-Resistant Material 概要

高クロム鋳鉄 is a third-generation wear-resistant material. 高い硬度とある程度の靭性を備えています.

しかし, cracks and breakage have often been seen due to low toughness. To fix this, a new composite method has been used.

複合材料の革新

A layer of carbon steel is added under the high chromium cast iron. This steel base is tough and absorbs impact.

結果として, the whole material becomes tougher while keeping its hardness and wear resistance.

✅ 主な特長:

• 接着強度: 以上 300 MPa

• Surface hardness: 以上 63 HRC

• 衝撃靱性: 以上 140 J/cm2

• Easy to weld, screw, or cut

技術的特徴

🔥 High-Temperature Furnace Compounding

A special furnace process removes chromium oxide from the surface. It bonds the layers tightly and lowers stress by slow cooling.

🔬 Microstructure Adjustment

Heat treatment changes the structure:

• 最上層 (Cast Iron): Martensite, residual austenite, and fine carbides

• ベースレイヤー (鋼鉄): Pearlite and ferrite

⚙️ Performance Design

The thickness of each layer can be changed to match different uses. This helps balance wear resistance and structure.

💪 Overall Performance

This material performs better than single-layer materials. It offers:

• 高い表面硬度 (HRC > 63)

• Strong layer bonding (> 200 MPa)

• High impact toughness (> 140 J/cm2)

Technical Principles

📉 Wear Behavior

The wear process follows the PARIS formula:
da/dN = C(ΔK)^n and h = Gb / 4π(1-γ)σf

⚙️ Functional Gradient Design

• Hard top layer: 高クロム鋳鉄

• Tough base: 鋼鉄

• Smooth transition: Multi-layer alloy layer (less than 0.5 mm thick)

Product Innovation

💡 Hardness + Toughness Combined

The new material solves the old problem of poor toughness. A strong bond is created using a gradual transition layer.

🏭 Applications

This material is used in:

• マイニング

• 冶金

• 発電所

• セメント工場

• Sugar factories

• Brick making

• Roadwork

It helps reduce metal loss from wear.

🛠 生産上の利点

従来の溶接や鋳造と比較して, この方法:

• 希釈層を除去します

• 結合を改善します

• までのせん断強度に達します 300 MPa