Placa de sobreposição de carboneto de cromo

Placa de sobreposição de carboneto de cromo: Differences Between Hardfaced Plates and Other Wear-Resistant Steels

Placa de cobertura de carboneto de cromo (Placa CCO) is a composite wear-resistant steel plate produced by welding a high-chromium carbide alloy layer onto a mild steel or low-alloy steel base plate. It is one of the most widely used hardfaced wear solutions in mining, cimento, aço, e indústrias de energia.

Compared with conventional wear-resistant steels such as NM400, NM500, or AR400 steel, chromium carbide overlay plate is fundamentally different in both structure and wear mechanism.

1. Structural Difference

Tipo de material	Estrutura	Recurso principal
Placa de cobertura de carboneto de cromo	Base steel + welded carbide overlay layer	Composite structure
NM400 / NM500 wear steel	Alloyed quenched & aço temperado	Homogeneous structure
AR400 / Aço AR500	Heat-treated alloy steel	Uniform hardness throughout thickness

The most important difference is that CCO plates have a two-layer structure, while traditional wear steels are single-material plates.

2. Wear Mechanism Difference

Tipo de material	Main Wear Resistance Mechanism
Placa de cobertura de carboneto de cromo	Hard carbide particles resist abrasion
NM400 / NM500 steel	High hardness matrix resists wear
Aço AR	Dureza e tenacidade equilibradas

CCO plates rely on extremely hard chromium carbide particles (CDH 58–65), while wear steels rely on overall bulk hardness.

3. Comparação de dureza e desempenho

Propriedade	Placa CCO	Aço resistente ao desgaste (NM/AR)
Dureza superficial	CDH 58–65	MP 400–500
Resistência ao desgaste	Excellent in sliding abrasion	Good in impact + abrasão
Resistência ao impacto	Mais baixo (brittle surface layer)	Higher toughness
Vida útil	Very long in abrasive conditions	Balanced in mixed conditions

4. Processing Difference

• Placa CCO: Requires plasma or laser cutting due to hard surface layer
• Usar aço: Mais fácil de cortar, dobrar, e soldar
• Placa CCO: May have controlled surface cracks to release stress
• Usar aço: No surface cracking is normal

5. Application Difference

Condição de aplicação	Best Material Choice
High sliding abrasion	Placa de cobertura de carboneto de cromo
Alto impacto + abrasão	NM400 / NM500 steel
Mixed working conditions	AR steel or hybrid solutions

6. Key Advantage of Chromium Carbide Overlay Plate

• Resistência ao desgaste extremamente alta em ambientes abrasivos
• Longa vida útil in chutes, tremonhas, e forros
• Replaceable wear surface concept (base plate remains intact)
• Cost efficiency in long-term maintenance

7. Teda Ganghua Wear Plate Supply Capability

Como fornecedor profissional de aço resistente ao desgaste, Teda Ganghua provides chromium carbide overlay plates and other wear-resistant steel solutions tailored to different industrial conditions, incluindo mineração, cimento, aço, e indústrias de geração de energia.

Apoiamos corte personalizado, fabricação, and full wear protection system design based on real operating environments.

Explore nossos produtos de aço resistentes ao desgaste aqui:
Placas de aço resistentes ao desgaste

Conclusão

Chromium carbide overlay plate differs from traditional wear-resistant steels because it uses a composite structure with a hard carbide overlay layer rather than a homogeneous steel body. This makes it far superior in abrasive wear conditions but less suitable for high-impact environments.