Copper Tungsten alloy combines the advantages
Posted by cobaltalloy on February 24th, 2018
Copper Tungsten alloy combines the advantages of tungsten and copper, tungsten high melting point (3410 ℃ melting point of tungsten, copper melting point of 1080 ℃), the density (tungsten density of 19.34g / cm3, the density of 8.89 g / cm3) ; Copper conductive superior thermal conductivity, tungsten copper alloy (composition of the general range WCu7 ~ WCu50) uniform microstructure, high temperature, high strength, resistance to arc ablation, density; conductive, thermal conductivity moderate, widely used in military high temperature materials , High-voltage switchgear alloy, electrodeposited electrode, microelectronic material, as parts and components are widely used in aerospace, aviation, electronics, power, metallurgy, machinery, sports equipment and other industries. Tungsten copper alloy used in aerospace as missiles, rocket engine nozzle, gas rudder, air rudder, nose cone, the main requirement is to require high temperature (3000K ~ 5000K), high temperature airflow erosion capability, the main use of copper at high temperature Volatile formation of sweat cooling (copper melting point of 1083 ° C), reduce the tungsten copper surface temperature, to ensure the use of extreme conditions at high temperatures. Tungsten copper alloy is widely used in high voltage switch 128kV SF6 circuit breaker WCu / CuCr, as well as high voltage vacuum load switch (12kV 40.5KV 1000A), arrester. The high voltage vacuum switch is small in size and easy to maintain. It is widely used in humid, Flammable and corrosive environments.
Downstream markets such as special steel and stainless steel performed poorly, with more steel products falling more slowly after the Spring Festival and no rebound. Molybdenum market since the last slight warmer, the recent rise again slowed down. Small fluctuations in product prices, businesses confidence in the market weakened. Short-term volatility expected market volatility of molybdenum limited market outlook to be boosted. Domestic tungsten prices rose too fast, resulting in some large differences in product prices in the region, 65 degrees tungsten black ore market quotations more in 12.2-12.5 million / ton, APT market is even more turmoil, widening range, part of the high prices up 188,000 yuan / ton, relatively low-key performance of ferrotungsten, powder market has been low to 285 yuan / kg closer, the waste tungsten steel remained stable. Tungsten price is expected to stabilize in the short term, individual range shocks.
Alloy preparation process flow diagram alloy preparation process is the key sintering process. Sintering temperature is generally 1400 ~ 1600 ℃, and the liquid phase, is conducive to the densification of the alloy, the sintered alloy can reach more than 99% of the theoretical density. Sintered products can also be used to improve the plasticity and strength of heat treatment, and then pressure processing, its mechanical properties significantly improved. High-density tungsten Cobalt Alloy in the national economy and national defense industry has been widely used. The aerospace industry is used for gyroscope rotors, counterweights and balancing materials, as well as for guides and shock absorbers; the petroleum industry, the nuclear industry and the medical device industry are used as shielding materials against all types of radiation; the mechanical industry is used as a die-casting Molds, tool holders, boring bars and automatic watch hammers; the weaponry industry is used as armor piercing material and drug cover material; the electric industry is used as 284 'rivet head and switch contact material; sporting goods can also be used as a golf racket Heavy materials.
