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Properties of tungsten alloyThe physical and mechanical properties of tungsten alloy mainly include the following nine aspects.High density: The density of high-density tungsten alloy is generally 16.5~19.0g/cm^3, which is equivalent to more than twice the density of steel.
High tensile strength: The tensile strength of sintered W-Ni-Fe high-density alloy is 800~1000MPa, and its strength can be increased to 1300~1500 MPa after heat treatment and deformation processing.
Good ductility: W-Ni-Fe high-density alloy has very good ductility, and its elongation in the sintered state can reach 10%~15%. After vacuum or atmosphere dehydrogenation treatment, the elongation can be increased to 20%~ 30%.
Good ability to absorb rays: The ability of high-density alloys to absorb rays is 30% to 40% higher than that of lead, and its stability is also better than that of lead.
Good electrical properties: W-Ni-Cu and W-Ni-Fe high-density alloys have good electrical conductivity, electric corrosion resistance, high voltage resistance and other electrical properties.
Good thermal conductivity and low linear expansion coefficient: its thermal conductivity is 5 times that of mold steel, and its linear expansion coefficient is only 1/2~1/3 of iron or steel.
Good corrosion resistance and oxidation resistance.Good weldability: High-density alloys can be brazed with copper and silver soldering materials and can be electroplated.
Good machining characteristics: Because W-Ni-Fe high-density alloy has good ductility, it can be processed by turning, milling, planing, threading and tapping, as well as rolling, swaging and forging.
Large deformation strengthening treatment.It is mainly used in the following aspects in cutting-edge science and technology such as aerospace and aerospace
1. Gyroscope rotor material. Gyroscopes are the brain of the navigation and control systems of aircraft, artificial satellites, various missiles and spaceships, nuclear submarines: the stability of the gyroscope increases with the increase of the weight of the rotating body, and the use of high-density alloy as the gyro rotor can make it Stability and control accuracy are greatly improved.
2. The inertial rotation element of the aircraft.3. Balance weight components on various instruments and engines. Such as the counterweight components used on the "Spei" engine and the counterweight components that control the split throttle to adjust the oil volume under high-speed operation.In addition, it is also widely used for static and dynamic balance weights on both sides of ailerons and steering rudders, and balance weights for helicopter rotating blades.In the military field, it is mainly used in the following aspects
1. W-Ni-Fe high-density alloy with very high density, strength, plasticity and hardness is a very critical material in the military industry. It is used as small arrows in cluster flechettes in bullets and in shaped energy bullets. "Gunpowder cover", shotguns, submunitions, screen rounds, and armor-piercing rounds have great destructive power.
2. In the missile, it is used as the gyro rotor of the missile instrument, the counterweight screw, the adjusting piece and the high-density alloy missile body weighing tens of kilograms.
3. Used as a counterweight in the speed regulator of tank engines.
4. Used as counterweights and shielding materials for nuclear reactors in nuclear submarines.Applications in the electrical industryTungsten alloy has good high-temperature strength, hardness, electrical conductivity and corrosion resistance, so it has broad application prospects in electrothermal processing.
There are many types of electrical equipment made of tungsten alloy, such as: anvil materials for electric heating upsetting [6], rivet materials for electric riveting, electrode materials for EDM, electric welding materials, electrical contact materials for high-voltage switches, etc.
Applications in industries such as machine manufacturing and pressure casting. It is used as a balancing component in the machinery and instrument manufacturing industry. For example, installing tungsten alloy counterweights on the drill pipe of an oil drilling rig can greatly improve the verticality of drilling and improve the efficiency of oil drilling depth. The high temperature properties of tungsten alloy make it a good mold material in the die casting industry.
Applications in the medical device industry. Because tungsten alloy has a strong ability to attenuate X-rays, it is an ideal material used as shielding components or containers for various radioactive sources. Used in medicine as radiation shielding materials and gamma ray knives.
Application in the sporting goods industryIn sporting goods, tungsten alloy manufacturing of racing car crankshafts can greatly improve the performance of racing cars. The edges of golf balls and tennis rackets are inlaid with tungsten alloy weights, which can make the rackets have stronger attack capabilities.
In heavy arrow competitions, when the arrows are made of tungsten alloy, the hit rate of heavy arrows can be greatly improved.Applications in other industriesSince the density of tungsten alloy is similar to that of gold (density of gold: 19.3 g/cm3, density of tungsten alloy: 19.0g/cm^3), it is used in the souvenir and jewelry industry to make rings, necklaces and commemorative coins. wait.
In the electronic communication industry, it is used as vibrator materials for BP machines and mobile phones. In addition, it is also widely used in the manufacturing of fishing sinkers in the fishing industry.
