language

Home

Products

Tungsten Carbide Overlay

Tungsten Carbide Overlay and Chromium Carbide Overlay are both advanced wear-resistant technologies, but they serve different industrial needs. Tungsten carbide provides superior hardness and extreme wear resistance for severe erosion environments, while chromium carbide overlay offers a more balanced combination of wear resistance, toughness, and cost efficiency. The choice depends on whether the application prioritizes maximum wear life or overall engineering balance.

Keywords:

Tungsten Carbide Overlay

Category:

Hardfacing Wear-resistant Plate

Inquiry Now

Send E-mail

File Download

sales1@tedaganghua.com

+86 22 86896631、+86 15822676888

Product Details

Tungsten Carbide Overlay (TCO) is a high-performance wear-resistant composite material produced by embedding tungsten carbide (WC) particles into a metallic matrix through welding or brazing processes. It is widely used in extreme wear environments such as mining, oil & gas drilling, cement processing, and high-speed particle erosion systems.

A common engineering comparison is between tungsten carbide overlay and conventional chromium carbide hardfacing (CCO), as both are widely used industrial wear solutions.

Material Composition Difference

Tungsten Carbide Overlay (TCO)

Tungsten Carbide (WC): Hard ceramic particles
Metal Matrix: Nickel-based, iron-based, or cobalt-based alloy
Structure: Dispersed ultra-hard particles in ductile matrix

Tungsten carbide is one of the hardest known industrial materials, giving the overlay exceptional wear resistance.

Chromium Carbide Overlay (CCO)

Chromium (Cr): 20–35%
Carbon (C): 3–5%
Iron (Fe): Balance
Structure: In-situ formed carbides (Cr₇C₃, Cr₂₃C₆)

The carbide phase is formed during welding rather than pre-added.

Hardness and Wear Resistance Comparison

Property	Tungsten Carbide Overlay	Chromium Carbide Overlay
Hardness	Extremely High (WC particles)	High (55–65 HRC)
Wear Resistance	Superior	Very High
Abrasion Type Suitability	Extreme erosion & cutting	General industrial abrasion
Impact Resistance	Medium–Low	Medium
Service Life	Very Long in severe wear	Long in standard wear

Wear Mechanism Difference

Tungsten Carbide Overlay Mechanism

Wear resistance comes from pre-formed WC ceramic particles
Particles resist cutting, grinding, and micro-fracture
Metal matrix holds carbide particles in place

This structure provides extremely high resistance to:

High-speed particle erosion
Severe sliding abrasion
Impact with fine hard particles

Chromium Carbide Overlay Mechanism

Wear resistance comes from in-situ formed chromium carbides (Cr₇C₃, Cr₂₃C₆)
Carbides form during solidification of weld layer
Hard matrix supports carbide structure

This system performs best in:

Bulk material sliding wear
Medium to high abrasion environments
General industrial wear conditions

Impact Resistance Comparison

Feature	Tungsten Carbide Overlay	Chromium Carbide Overlay
Brittleness	Higher	Medium
Crack Resistance	Lower	Better
Shock Absorption	Limited	Supported by steel base
Suitable Impact Level	Low–Medium	Medium–High

Tungsten carbide systems are more sensitive to impact and sudden shock loads.

Cost and Manufacturing Complexity

Factor	Tungsten Carbide Overlay	Chromium Carbide Overlay
Material Cost	High	Moderate
Welding Difficulty	High	Standard industrial process
Equipment Requirement	Specialized	Widely available
Production Efficiency	Lower	Higher