Hochchrom -Gusseisenverbundstoff

Wear-Resistant Material Überblick

Gusseisen mit hohem Chromgehalt is a third-generation wear-resistant material. Es bietet eine hohe Härte mit einer gewissen Zähigkeit.

Jedoch, Aufgrund der geringen Zähigkeit kam es häufig zu Rissen und Brüchen. Um das zu beheben, Es wurde eine neue Verbundmethode verwendet.

Innovation bei Verbundwerkstoffen

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

Infolge, the whole material becomes tougher while keeping its hardness and wear resistance.

✅ Hauptmerkmale:

• Bindungsstärke: Über 300 MPa

• Oberflächenhärte: Über 63 HRC

• Schlagzähigkeit: Über 140 J/cm²

• Easy to weld, screw, or cut

Technische Merkmale

🔥 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:

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

• Basisschicht (Stahl): 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. Es bietet:

• Hohe Oberflächenhärte (HRC > 63)

• Strong layer bonding (> 200 MPa)

• Hohe Schlagzähigkeit (> 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: Gusseisen mit hohem Chromgehalt

• Tough base: Stahl

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

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:

• Bergbau

• Metallurgie

• Kraftwerke

• Zementwerke

• Sugar factories

• Brick making

• Roadwork

It helps reduce metal loss from wear.

🛠 Production Advantage

Compared to traditional welding and casting, this method:

• Removes dilution layers

• Improves bonding

• Reaches shear strength up to 300 MPa