Placa de desgaste Cco
CCO Wear Plate is called a weld overlay plate because its wear-resistant surface is created by welding a hard alloy layer onto a steel base plate. This manufacturing process, known as hardfacing, forms a strong metallurgical bond and produces a high-chromium carbide surface layer.
- Descrição
Placa de desgaste CCO (Placa de desgaste de sobreposição de carboneto de cromo) is a highly wear-resistant steel product widely used in mining, cimento, usinas de energia, e equipamentos industriais pesados. It is commonly called a “weld overlay plate” or “hardfacing wear plate” because its surface is formed by a welding deposition process rather than rolling or casting.
The name directly reflects its manufacturing method and structure.
Why It Is Called a Weld Overlay Plate
The term “weld overlay” comes from the way the wear-resistant layer is created.
Unlike traditional steel plates that are produced by rolling, CCO wear plate is made by:
- Depositing a hard alloy layer onto a steel base
- Using welding technology to fuse the materials
- Creating a metallurgical bond between layers
This “overlay” layer is what gives the plate its extreme wear resistance.
So, it is called a weld overlay plate because the surface is literally “welded on” rather than formed as a single solid piece.
Manufacturing Process of CCO Wear Plate
The production of CCO wear plate involves several controlled steps to ensure strong bonding and high wear resistance.
1. Preparação da Placa Base
A mild steel or low-carbon steel plate is selected as the base material.
Functions of base plate:
- Fornece resistência estrutural
- Absorbs impact loads
- Supports machining and installation
The surface is cleaned to remove oil, ferrugem, and impurities before welding.
2. Processo de soldagem de revestimento duro
The core step is the deposition of a wear-resistant alloy layer.
Os métodos comuns de soldagem incluem:
- Soldagem a arco aberto
- Soldagem por arco submerso
- Soldagem a arco fluxado
During this process, a high-chromium alloy wire or powder is melted and deposited onto the base plate.
3. Formation of Carbide Overlay Layer
As the molten alloy cools, it forms a hard microstructure:
- Chromium carbide particles (extremely hard phase)
- Iron-based metallic matrix
- Strong metallurgical bonding with base steel
This structure provides excellent wear resistance.
4. Multi-Layer Deposition (if required)
Para maior resistência ao desgaste, multiple welding layers may be applied:
- First layer: bonding and transition layer
- Second layer: main wear-resistant layer
- Additional layers: enhanced hardness and thickness
5. Resfriamento e Acabamento
Depois de soldar, the plate is cooled and processed:
- Stress relief and stabilization
- Inspeção de superfície quanto a rachaduras ou defeitos
- Endireitamento e nivelamento
- Cortando nos tamanhos necessários
Key Features of the Manufacturing Process
The weld overlay process gives CCO wear plate several advantages:
- Forte ligação metalúrgica entre camadas
- Extremely hard wear-resistant surface
- Tough and impact-resistant base support
- Adjustable thickness of overlay layer
- Suitable for extreme abrasion environments
