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Chrome Carbide Overlay Wear Plate

Chrome carbide overlay wear plate, also known as chromium carbide overlay plate (CCO plate), is a composite wear-resistant steel plate designed for

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Chrome Carbide Overlay Wear Plate

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Hardfacing Wear-resistant Plate

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Product Details

Chrome Carbide Overlay Wear Plate: Manufacturing Process of Hardfaced Wear Plate

Chrome carbide overlay wear plate, also known as chromium carbide overlay plate (CCO plate), is a composite wear-resistant steel plate designed for severe abrasion environments. It is manufactured by depositing a high-hardness chromium carbide alloy layer onto a mild steel or low-alloy steel base plate through advanced hardfacing technology.

The manufacturing quality of overlay wear plate depends heavily on the production process, including base plate preparation, overlay welding, cooling control, and final processing.

1. Base Plate Preparation

The first step is selecting a suitable substrate material. Common base plates include mild steel and low-alloy structural steel.

Base Plate Material	Main Feature
Q235 / Mild steel	Economical, good weldability
Q345 / Low alloy steel	Higher strength and better toughness
Wear-resistant steel	Improved impact resistance

Before welding, the base plate surface must be cleaned to remove oil, rust, and contamination.

2. Overlay Welding Process

This is the core manufacturing step where the wear-resistant alloy layer is deposited.

Welding Technology	Main Advantage
Open arc welding	High efficiency, cost-effective
Submerged arc welding	Stable quality, thicker overlay
PTA welding	Low dilution, high precision

The welding material usually contains high carbon and high chromium alloy components to form hard chromium carbides.

3. Carbide Formation During Welding

During hardfacing, carbon and chromium react to form chromium carbide particles (mainly M7C3 carbides) distributed throughout the overlay layer.

High carbide density improves abrasion resistance
Uniform carbide distribution improves wear consistency
Controlled dilution ensures stable overlay chemistry

4. Controlled Cooling Process

After welding, controlled cooling is essential to stabilize the overlay microstructure and minimize cracking risk.

Cooling Objective	Function
Stress control	Reduces residual welding stress
Crack management	Controls surface crack formation
Microstructure stability	Ensures optimal carbide formation

Small surface stress-relief cracks are normal and help release internal stress in overlay plates.

5. Cutting and Fabrication Processing

After overlay production, plates can be processed into custom wear parts.

Processing Method	Application
Plasma cutting	Plate cutting
Laser cutting	Precision cutting
Bending	Wear liners and curved parts
Welding fabrication	Custom assemblies

6. Quality Inspection

Inspection Item	Requirement
Overlay thickness	Meets specification
Hardness	Typically HRC 58–65
Bonding quality	Strong metallurgical bonding
Surface quality	No severe defects

7. Teda Ganghua Overlay Plate Manufacturing Capability

As a professional wear-resistant steel supplier, Teda Ganghua provides chrome carbide overlay wear plates with stable hardness, uniform carbide distribution, and reliable wear performance.

We support customized cutting, bending, welding fabrication, and complete wear solution design for mining, cement, steel, and power industries.

Explore our wear-resistant steel products here: Wear Resistant Steel Plates

Conclusion

The manufacturing process of chrome carbide overlay wear plate includes base plate preparation, overlay welding, carbide formation, controlled cooling, fabrication, and inspection. Each step directly affects wear resistance and service life in industrial applications.