Aleación de plata y wolframio

Tungsten Silver Alloy Data Sheet

Aleación de plata y wolframio

Tungsten Silver Alloy, also called silver tungsten alloy, is a durable refractory metal alloy. It belongs to two structural false alloys and is a metal matrix composite material. Due to the large difference between the physical properties of metal silver and tungsten, it can’t be manufactured by melt casting method and is generally obtained by powder metallurgy technology. HM provides high-precision tungsten silver alloy products in various forms, including rods, plates, sheets, bars, tubes, blocks, pellets, wires, and discs, all crafted to ensure exceptional quality and customer satisfaction. We manufacture large, complex parts using isostatic pressure molding technology, while smaller parts are produced through extrusion, molding, and injection molding techniques. Additionally, rods and sheets are fabricated using forging and rolling processes.

Tungsten Silver Alloy Material Composition And Properties

Review the physical and mechanical properties listed below to select the suitable tungsten-silver alloy for your application.

Silver Tungsten Carbide Alloy

HM can also supply high-quality silver tungsten carbide alloys. It is prepared by the tungsten carbide skeleton fusion infiltration method, the material is extremely hard, and its contact resistance is slightly higher than that of silver tungsten. It has excellent resistance to fusion welding and arc corrosion. When a high temperature is generated during the arc combustion process, the free carbon contained in WC can slow down the oxidation of tungsten or reduce tungsten, slowing down the overall oxidation of the material, which can effectively improve the antioxidant capacity of the contact and the stability of the electrical properties of the contact under energized state. Silver Tungsten Carbide Alloy is mainly applied in the following fields:

• Electrical Field: Silver tungsten carbide alloy can be used as contact materials for circuit breakers and other switching appliances, with resistance to moisture and heat, and corrosion resistance.
• Electronic Field: Silver tungsten carbide alloy can be used for manufacturing electronic components and connectors, such as integrated circuit packages and transistor connectors.
• Energy Field: Silver tungsten carbide alloy is used as electrode material in solar panels and fuel cells.
• Sector aeroespacial: Silver tungsten carbide alloy can be used to manufacture high-temperature parts of aircraft engines and rocket nozzles.

Silver Tungsten Carbide Alloy Specification

Copper Tungsten Carbide Alloy

Copper Tungsten Carbide Alloy is made of high-quality tungsten carbide powder and oxygen-free copper powder by pressing, sintering, and infiltrating. It is characterized by high-temperature resistance, arc abrasion resistance, electrical conductivity, and good thermal conductivity. Copper Tungsten Carbide Alloy is commonly used in the following areas:

• Electrical Contact Materials: Because copper tungsten carbide alloys are resistant to arc ablation and highly conductive, they are commonly used as contact materials for high-voltage switches and circuit breakers.
• Electrode Materials: Copper tungsten carbide alloy can be used for EDM and resistance welding electrodes.
• Componentes de alta temperatura: In the aerospace field, copper tungsten carbide alloys are used to manufacture rocket nozzles and high-temperature molds.

Copper Tungsten Carbide Alloy Specification

Tungsten Silver Alloy Features

• High-temperature resistance
• Resistant to arc erosion
• Alta resistencia
• Alta densidad
• Uniform microstructure
• Easy cutting and machining

Tungsten Silver Alloy Production Process

Tungsten-silver alloy, similar to the tungsten-copper alloy, is a pseudo-alloy of copper and the refractory metal tungsten and is generally produced using powder metallurgy. Since silver and tungsten are immiscible, the infiltration method is used to achieve bonding between the two materials. After compacting the porous tungsten preform, silver is allowed to infiltrate it, followed by sintering. The material is then machined to achieve the required geometry as specified by the customer. The specific processes are as follows:

• Compaction: The porous tungsten preform is compacted.
• Infiltration: Silver is allowed to infiltrate the compacted tungsten preform.
• Sinterización: The infiltrated material is sintered at high temperatures, forming a dense solid.
• Recocido: The sintered products undergo annealing to remove internal stresses and improve toughness and ductility.
• Mecanizado: Los procesos de mecanizado de precisión, como el torneado, el fresado y el rectificado, se aplican a las piezas sinterizadas para conseguir las dimensiones y formas finales.
• Tratamiento térmico: La aleación se somete a un tratamiento térmico adicional para optimizar propiedades como la dureza, la resistencia u otras características físicas.
• Tratamiento de superficies: Si es necesario, se aplican tratamientos superficiales (como revestimiento, pasivado, etc.) para mejorar la resistencia a la corrosión, la dureza u otras propiedades.

Tungsten Silver Alloy Machining Service

HM dispone de centros de mecanizado avanzados equipados con diversos equipos de procesamiento de alta precisión, lo que nos permite ofrecer múltiples servicios de mecanizado, como torneado, fresado, rectificado y taladrado. Tanto si se trata de una producción a gran escala como de pedidos personalizados de lotes pequeños, garantizamos una alta precisión y rendimiento para satisfacer los requisitos específicos del cliente. A continuación se indican los métodos que utilizaremos durante el procesamiento:

• Prensado isostático
• Forja
• Extrusión
• Moldeo
• Moldeo por inyección
• Rodando
• Mecanizado por descarga eléctrica (EDM)
• Fresado
• Girar

Tungsten Silver Alloy Applications

• Electrical Contact Materials: Silver-tungsten alloy is widely used in electrical switches, circuit breakers, relays, and contactors due to tungsten’s high melting point, hardness, and stability under high current, pressure, and temperature, ensuring long service life.
• Electrode Materials: This alloy is also utilized in electric discharge machining (EDM) electrodes and electrochemical electrodes. Its high melting point, hardness, and excellent electrical conductivity allow stable operation in demanding conditions.
• Vacuum Equipment Components: Silver-tungsten alloy is key in manufacturing vacuum circuit breakers, tubes, and electrodes. Its high melting point and corrosion resistance make it ideal for high vacuum environments.
• Dispositivos electrónicos: It is used in special devices like cathode ray tubes (CRT) and X-ray tubes, thanks to its stability under high currents and temperatures.
• Aerospace Devices: In aerospace, the alloy’s high-temperature resistance, wear resistance, and conductivity are essential for engine and missile components.

Tungsten Silver Alloy Packaging

The Tungsten Silver Alloy is carefully placed in wooden cases or cartons with additional support from soft materials to prevent any shifting during transportation. This packaging method guarantees the integrity of the products throughout the delivery process.