STELLITE® Alloy 6 Product Introduction
STELLITE® Alloy 6 is a cobalt-chromium-tungsten alloy renowned for its exceptional wear resistance, high temperature strength, and corrosion resistance. This article provides a detailed introduction to STELLITE® Alloy 6, covering its chemical composition, mechanical properties, performance at different temperatures, industry applications, shapes and sizes, production standards, welding and processing capabilities, advantages and disadvantages, and comparisons with similar alloys.
Composição química
STELLITE® Alloy 6 is primarily composed of cobalt, chromium, tungsten, and smaller amounts of nickel and iron for enhanced properties.
| Elemento | Composição (%) |
|---|---|
| Cobalto (Co) | 54,0 – 62,0 |
| Cromo (Cr) | 27,0 – 32,0 |
| Tungstênio (W) | 8,0 – 10,0 |
| Carbono (C) | 1.15 – 1.85 |
| Níquel (Ni) | 3,0 máx. |
| Ferro (Fe) | 3,0 máx. |
| Silício (Si) | 1,0 máx. |
| Manganês (Mn) | 1,0 máx. |
| Fósforo (P) | 00,03 máx. |
| Enxofre (S) | 00,03 máx. |
Propriedades mecânicas
STELLITE® Alloy 6 exhibits excellent mechanical properties suitable for high-wear applications:
| Propriedade | Valor |
|---|---|
| Resistência à tração, ksi (MPa) | 120 (830) min |
| Força de rendimento (compensação de 0,2%), ksi (MPa) | 85 (590) min |
| Alongamento (% em 2 polegadas) | 20 min |
| Dureza, Rockwell C (HRC) | 48 – 55 |
Características de desempenho
STELLITE® Alloy 6 offers outstanding performance in severe conditions:
- Resistência ao desgaste: Excepcional resistência à abrasão, erosão e desgaste metal-metal, tornando-o ideal para ambientes de desgaste de alta tensão.
- Resistência à corrosão: Good resistance to oxidation and corrosion in high-temperature environments, including acids and alkalis.
- Resistência a altas temperaturas: Mantém alta resistência e dureza em temperaturas elevadas, até aproximadamente 1200°F (650°C).
Aplicações Industriais
STELLITE® Alloy 6 is widely used across various industries for its wear and corrosion resistance properties:
| Setor Industrial | Formulários |
|---|---|
| Aeroespacial | Aircraft engine components, turbine blades, and wear-resistant coatings. |
| Petróleo e Gás | Valve seats, pump components, and drilling tools exposed to abrasive environments and corrosive fluids. |
| Geração de energia | Gas turbine blades, boiler components, and steam turbine seals requiring high wear resistance and durability. |
| Máquinas Industriais | Ferramentas de corte, matrizes de extrusão e placas de desgaste em equipamentos de fabricação. |
Formas e tamanhos
STELLITE® Alloy 6 is available in various forms and sizes to meet specific application requirements:
- Formulários: Folhas, placas, barras, tubos e formatos personalizados.
- Tamanhos: Espessura variando de 0,025 polegadas a 1.000 polegadas (0,64 mm a 25,4 mm), diâmetro variando de 0,25 polegadas a 6,0 polegadas (6,35 mm a 152,4 mm).
Padrões de produção
STELLITE® Alloy 6 complies with industry standards for quality and performance:
| Formulário de produto | Formas disponíveis | Tamanhos disponíveis | Padrões de produção |
|---|---|---|---|
| Barras | Barras redondas, barras quadradas | Diâmetro: 0,25″ – 6,0″ (6,35mm – 152,4mm) | ASTM A732 |
| Placas/Folhas | Pratos, Folhas | Espessura: 0,025″ – 1.000″ (0,64mm – 25,4mm) | ASTM A732 |
| Varetas de soldagem | Varas | Diâmetro: 0,125″ – 0,500″ (3,18mm – 12,7mm) | AWS A5.13 |
Soldagem e Processamento
STELLITE® Alloy 6 offers good weldability and machinability:
- Soldagem: Pode ser soldado usando métodos convencionais como soldagem TIG e MIG com pré-aquecimento e tratamento térmico pós-soldagem para manter as propriedades.
- Processamento: Machinable using carbide tooling, although high cobalt content requires slower speeds and heavy feed rates.
Vantagens e desvantagens
| Aspecto | Detalhes |
|---|---|
| Vantagens | High wear resistance, excellent strength at elevated temperatures, good corrosion resistance, and suitability for extreme environments. |
| Desvantagens | Custo mais elevado em comparação aos materiais convencionais, requer técnicas especializadas de usinagem e soldagem devido ao alto teor de cobalto. |
Ligas semelhantes
| Nome da liga | Comparação |
|---|---|
| STELLITE® Alloy 12 | Lower carbon content, offering improved weldability and machinability compared to Alloy 6. |
Comparação de ligas semelhantes
| Propriedade/Recurso | Liga STELLITE® 6 | STELLITE® Alloy 12 |
|---|---|---|
| Conteúdo de cobalto (%) | 54,0 – 62,0 | 31.0 – 35.0 |
| Conteúdo de cromo (%) | 27,0 – 32,0 | 8,0 – 10,0 |
| Conteúdo de tungstênio (%) | 8,0 – 10,0 | 00,5 máx. |
| Dureza, Rockwell C (HRC) | 48 – 55 | 28 – 36 |
| Formulários | Componentes de válvulas, matrizes de extrusão | Welding electrodes, pump parts |
This comprehensive article offers a detailed introduction to STELLITE® Alloy 6, highlighting its chemical composition, mechanical properties, performance characteristics, industry applications, available forms and sizes, production standards, welding and processing capabilities, as well as advantages, disadvantages, and comparisons with similar alloys. Engineers and professionals seeking high-performance materials for wear and corrosion resistance applications will find this information invaluable for selecting the appropriate alloy for their specific needs.