- Descrição
Hard Surfacing vs Hard Facing Plate: Understanding the Terminology and Choosing the Right Product
In the wear protection industry, buyers often encounter terms such as hard surfacing, hard facing plate, sobreposição de solda, revestimento, e fusion bonded wear plate. Although these words are closely related, they do not always refer to the same product.
A common purchasing mistake happens when suppliers and buyers use the same terminology but imagine different products. Por exemplo, one customer may ask for “revestimento duro” expecting a finished chromium carbide overlay plate, while another may mean only the welding process itself.
This guide explains the industrial meaning of these terms, their differences, and how buyers from different regions usually specify wear-resistant materials.
1. Hard Surfacing vs Hard Facing Plate: The Core Difference
| Prazo | Significado | Product or Process? |
|---|---|---|
| Hard Surfacing | A general process of applying a wear-resistant alloy layer onto a metal surface | Processo / technology |
| Hard Facing Plate | A finished composite plate with a wear-resistant overlay layer bonded to a steel base | Finished product |
| Revestimento duro | Industrial term for creating a hard protective surface by welding or thermal spraying | Process category |
| Placa de sobreposição de carboneto de cromo | A specific type of hard facing plate using chromium carbide alloy overlay | Finished product |
Simply explained:
- Hard surfacing = how the wear layer is created.
- Hard facing plate = the final material you purchase and install.
2. What Does Hard Surfacing Mean?
Hard surfacing refers to any technology used to improve surface wear resistance by adding a harder material layer onto a base metal.
The base material is usually:
- Carbon steel
- Low alloy steel
- Aço inoxidável
- Cast iron components
The deposited layer may contain:
- Carboneto de cromo
- Carboneto de tungstênio
- Ligas à base de níquel
- Cobalt-based alloys
- Iron-based wear alloys
Hard surfacing is commonly applied to:
- Crusher teeth
- Baldes de mineração
- Rolos de moinho
- Assentos de válvula
- Industrial components requiring repair or protection
3. What Is a Hard Facing Plate?
A hard facing plate is a factory-produced composite wear plate designed for installation as a replaceable wear liner.
Its typical structure:
| Camada | Função |
|---|---|
| Wear Overlay Layer | Provides high abrasion resistance, usually HRC 50-65 dureza |
| Steel Backing Plate | Fornece resistência, welding ability, e suporte estrutural |
The most common commercial version is the placa de cobertura de carboneto de cromo (Placa CCO), widely used in mining, cimento, aço, e indústrias de energia.
4. Understanding Four Common Industry Terms
4.1 Sobreposição de solda
“Weld overlay” describes the manufacturing method where a wear-resistant alloy is deposited onto a steel substrate through welding.
It emphasizes the bonding process rather than the final application.
Common methods:
- Soldagem por arco submerso (SERRA)
- Soldagem a arco aberto
- Soldagem a arco de metal a gás
- Plasma Transfer Arc
4.2 Revestimento
Cladding is a broader engineering term describing the bonding of one material layer onto another material.
Cladding may include:
- Weld cladding
- Colagem de explosão
- Colagem de rolo
- Revestimento a laser
In some industries, “clad plate” may refer to corrosion-resistant stainless steel bonded plates rather than abrasion-resistant plates, so buyers should confirm the application.
4.3 Fusion Bonded Wear Plate
Fusion bonded wear plate refers to a wear layer metallurgically bonded to the steel substrate through melting and solidification.
The term highlights:
- Strong metallurgical connection
- Low risk of delamination
- High load-bearing capability
4.4 Revestimento duro
Hardfacing is the most commonly used industry spelling, especially in North America and Australia.
It generally means applying a hard alloy surface to improve wear resistance.
It can describe:
- Repair welding
- Component protection
- Wear plate production
5. Regional Purchasing Terminology Differences
| Região | Common Terms | Buyer Expectation |
|---|---|---|
| Estados Unidos | Hardfacing plate / Chrome carbide overlay / Placa CCO | Usually means finished wear plate |
| Europa | Weld overlay plate / Wear resistant cladding | Focus on metallurgical bonding and standards |
| Austrália | Revestimento duro / Chromium carbide plate | Mining industry focused terminology |
| Sudeste Asiático | Hard facing plate / Placa CCO | Often used for mining and cement projects |
6. Hard Facing Plate vs Wear Resistant Steel Plate
| Material | Recurso principal | Suitable Condition |
|---|---|---|
| Placa de sobreposição de carboneto de cromo | Extremely high surface hardness | Abrasão deslizante severa |
| NM400/NM500 Wear Plate | Dureza e tenacidade equilibradas | Impacto + abrasão |
| Standard Steel Plate | Low cost and easy fabrication | Light wear |
7. How Buyers Should Specify the Product
To avoid misunderstanding, buyers should provide more than just the word “revestimento duro”.
A complete specification should include:
- Product type: chromium carbide overlay plate or other alloy
- Espessura da placa base
- Espessura da sobreposição
- Hardness requirement
- Chemical composition requirement
- Tamanho da placa
- Application condition
8. Common Purchasing Mistakes
- Assuming all hardfacing plates have the same wear life
- Comparing only hardness without checking carbide structure
- Confusing repair hardfacing with factory overlay plates
- Ignoring base plate toughness in impact applications
- Choosing the cheapest plate without considering replacement frequency
9. Hard Facing Plate Solutions from Teda Ganghua
Teda Ganghua provides professional wear protection solutions for customers in mining, cimento, aço, geração de energia, e setores industriais pesados.
Our product solutions include:
- Placas de revestimento de carboneto de cromo
- Customized hard facing plates
- Wear liner solutions for severe abrasion environments
- Cutting and fabrication support according to project requirements
By combining material selection experience with application analysis, Teda Ganghua helps customers choose the correct wear protection solution instead of simply purchasing by price.
Learn more:
Placa de sobreposição de carboneto de cromo
Conclusão
Hard surfacing and hard facing plate are related but different concepts. Hard surfacing describes the technology, while hard facing plate describes the finished wear-resistant product.
For international buyers, understanding the difference between hardfacing, sobreposição de solda, revestimento, and chromium carbide overlay plate helps prevent specification errors and ensures the purchased material matches the actual working condition.
