Cobaltalloy new material Silver Tungsten Alloy is tungs […]
Cobaltalloy new material Silver Tungsten Alloy is tungsten, silver-based two-phase structure composed of a pseudo-alloy, is a metal matrix composites. Due to the large differences between physical properties of metallic silver and tungsten, they can not be produced by the melting casting method, and are generally obtained by the powder alloy technique. The advantages of tungsten and silver metal, which tungsten high melting point (tungsten melting point of 3410 ℃), the density (tungsten density of 19.34g / cm3); widely used in high temperature materials, high voltage switch with electrical alloys, electrical processing electrodes, Microelectronic materials, as components and components widely used in aerospace, aviation, electronics, electricity, metallurgy, machinery, sports equipment and other industries.
Tungsten steel is carbide, also known as tungsten-titanium alloy. Hardness can reach 89 ~ 95HRA, precisely because of this, tungsten steel products, not easily worn, hard not afraid of annealing, but brittle characteristics. Tungsten steel sintering is the powder pressed into billets, and then into the sintering furnace heated to a certain temperature (sintering temperature), and for a certain period of time (holding time), and then cooled down to obtain the desired properties of tungsten steel material. Silver tungsten material has good welding and corrosion resistance, so in industrial and domestic circuit breakers range of applications is very wide. Various types of silver-tungsten provide higher silver with higher electrical conductivity, and higher tungsten makes it more aggressive and solderable. Materials are made of higher tungsten content, burned contacts for large low voltage circuit breakers, and carry a stable line current molded case circuit breaker contacts and various protective circuit breaker equipment.
Silver tungsten alloy silver tungsten electrode is mainly used in electrode materials and welding materials; such as: low-voltage automatic switch, high-voltage circuit breakers and protection switches and so on. Widely used in high temperature materials, high voltage switchgear alloy, electrical processing electrodes, microelectronic materials, as components and components widely used in aerospace, aviation, electronics, power, metallurgy, machinery, sports equipment and other industries.
Titanium carbide TiC ceramic is face-centered cubic crystal type, high melting point, good thermal conductivity, hardness, chemical stability, no hydrolysis, high temperature oxidation resistance, at room temperature does not react with acid, but in nitric acid and hydrofluoric acid Of the mixed acid can dissolve, at 1000 ° C in a nitrogen atmosphere to form a nitride. Mechanical manufacturing according to advanced technology drawings after conversion in the production of lead bronze centrifugal casting technology, however, customs can not get foreign orders, due to the price is too high, and some use of alternative copper alloy production, resulting in life is too short, causing great Troubled.
Major mining enterprises and other purchased equipment, bushings or watts to the service life, due to foreign manufacturers even wearing parts drawings are not provided, let alone tell what is the material and process methods, even if the material is also known to produce come out. Only to get the manufacturer to purchase, the price is quite high, but no solution, only to spend expensive to buy.
The application of tungsten silver alloy and tungsten copper alloy is also relatively similar, tungsten silver alloy used as a solid rocket nozzle throat lining. In the electrical switch, tungsten silver alloy more for lower voltage circuit breakers, automatic switches, contactors and other requirements of good oxidation resistance, conductive thermal conductivity, contact size smaller, frequent opening and closing of the occasion.
Silver tungsten material has good welding and corrosion resistance, it is widely used in industrial and domestic circuit breakers. Various types of silver-tungsten provide higher silver with higher electrical conductivity, and higher tungsten makes it more aggressive and solderable.
Silver tungsten materials are made of higher tungsten content for large low-voltage circuit breaker burned contacts, and carry a stable line current molded case circuit breaker contacts and various protection circuit breaker equipment. These contacts can also be used for high current contact resistance welding and arc erosion. Silver tungsten electrode is generally used for aluminum, magnesium alloy AC welding.
Preparation of silver tungsten powder metallurgy, more than 60% of the tungsten alloy after immersion greater capacity. Mainly used for low voltage power switch, lifting switch, switch locomotive, high current switch contacts, heavy duty relays, air circuit breakers and other cobalt. These can improve wet silver tungsten, in order to reduce the ability to contact resistance.