The main properties for tungsten heavy alloy as follows are show us tungsten alloy advantages:

1--High Density: the maximum density may be higher than 19g/m3 with tungsten content from 80%W to 98%W and in strict accordance with your requirements.

2--High Melting Point: the highest melting point as 3,422 C, 6,192 F and the highest tensile strength.

3--Excellent Hardness: from 24 HRC to 36 HRC, or even above 40 HRC through swaging.

4--Superior Wearing Resistance: excellent wearing resistance , even in corrosion environments with high concentrations of CO2、H2S、Cl.

5--High Ultimate Tensile Strength: excellent properties almost for products used in military or other high-tech filed.

6--High Temperature Resistance: optimum parameters had been obtained as bonding temperature 1403K, bonding time 50min, bonding pressure 7.5MPa and cooling velocity 5K/min.


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Tungsten heavy alloys are generally refractory metals, which have two-phase composites consisting of W-Ni- Fe or W-Ni- Cu or even W-Ni-Cu-Fe, some tungsten alloy also contain Co、Mo、Cr, etc. They have very high melting point and have a density twice that of steel and are more than 50% heavier than lead. Tungsten content in conventional heavy alloys varies from 90% to 97% .This high tungsten phase content is the reason for their high density.

The most important tungsten alloy advantages is that small volume with high density, which means it could be used in some fields need the little but heavy parts, especially for military defense and it plays very important role in projectiles.




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U.S. defense technology in metallurgy conference held in September 1977, the U.S. Army Ballistic Research Institute published "metallurgical analysis of kinetic energy penetrator bombs tungsten alloy core and non-destructive testing," the papers. The elastic core where the study goose alloy (containing 90% goose, nickel and iron, 3% 7%, powder metallurgy, thermal treatment, machining, and this 12% reduction swaging rod made ​​of a diameter of 23.7 mm when, long 431.8 mm) in the process, found in this sample penetration bomb core and multi-target plate spacing single homogeneous armor Target, often severe fracture.

Thus, the non-destructive testing and destructive testing methods using standard core material for this bomb metallurgical characteristics were analyzed. Studies have shown that non-destructive testing is to detect a bomb core woven together so the whole crack and pore defects very reliable method. Used in non-destructive testing methods and test results are as follows: (1) visual inspection of the surface of the rod visual inspection swaging found serious cracks and chips. 2.X radiographic examination of the test showed that the lever 72, there is no obvious defects 17, the remaining 55 are distributed along the full length of irregular cracks and pores in the size range of 0.39 a 3.18 mm. 5 full-length magnetic particle inspection found on the surface of the rod are showing varying degrees of discontinuities.


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M993 tungsten alloy penetrators are American soldiers in 1992 to enhance the development of the plan, the purpose is to enhance the soldier for light armored vehicles strike capability. And 5.56mmM995 while research and development, both structures are different but the same size. In April 1997 shooting of BRDM-2 armored vehicles in Russia results showed that: the breakdown of these two bullets still valid after the armored vehicle anti-personnel side armor.

M993 tungsten alloy penetrators are American soldiers in 1992 to enhance the development of the plan, the purpose is to enhance the soldier for light armored vehicles strike capability. And 5. 56mmM995 while research and development, the two structures are different but the same size. In April 1997 shooting of BRDM-2 armored vehicles in Russia results showed that: the breakdown of these two bullets still valid after the armored vehicle anti-personnel side armor.

External M993 for mild steel jacketed, bullet inside a tungsten alloy penetrator. Time bomb by the Swedish Bofors CGAB production by the Dynamit Noble propellant production. The shells can be the same as the M240 machine guns, M60 machine gun, M24 sniper rifles and other weapons systems.


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Tungsten alloy ball, small size, can be applied to missile projectiles, projectile, hunting equipment, shotguns, prefabricated pieces, missile weapons, armor-piercing ammunition counterweight; petroleum logging counterweight; There are some areas of precision instruments, such as mobile phones vibrator clock with weights, watches watches counterweight, phone vibrator, flywheel weight, tungsten ball. High proportion of tungsten and tungsten alloy ball counterweight counterweight and is widely used in factories, as well as in the military.

Military products above tungsten alloy lead substitute, since the higher density so that they can be better, even under extreme conditions, to maintain its shape. Although uranium to provide comparable density, the volatility and special licensing requirements needed for radioactive materials, the processing is difficult. Tungsten heavy alloy is a metallic green material, does not produce toxic substances in the use and production process. In the expanding military industry while also taking into account the environmental impact of the use of military weapons, environmental performance advantages of tungsten alloy makes it more and more prominent in the military field. Such as tungsten alloy tail off shell, tungsten alloy counterweight submarines, tungsten alloy engine parts and so on.



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3. Push rivet back into place with gun set and reposition rivet bar, if necessary, to maintain its point of balance on the rivet. (repeat steps 2 and 3 until point of balance is determined). Often the index finger can be placed on the back of the rivet bar directly opposite the rivet tail. It then becomes the 'sensor' for correct bar position.



4. Pressure is held on gun while riveting. Tungsten alloy rivet bucking bar is held with only moderate force (otherwise rivet may be set with head proud of surface). A rubber grommet may be used over the rivet tail to assist in squeezing parts together during riveting. It acts as a 'pressure plate'.




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Heavy alloy, also known as high density tungsten alloy, tungsten as matrix (content 85-99%), added alloy Ni, Cu, Co, Mo, Cr and other elements. Use according to the alloy composition and characteristics into W-Ni-Fe, W-Ni-Cu, W-Co, W-WC-Cu, W-Ag major series, a high density of 16 .5-19.0g/cm3, so also known as high-density alloy.

The main properties of an alloy of high specific gravity material are: high density, generally accounting for 16.5-18.75g/cm3; high strength, tensile strength of 700-1000Mpa; strong ability to absorb radiation, 30-40% higher than that of lead; thermal conductivity coefficient, W the thermal conductivity of the alloy tool steel 5 times; thermal expansion coefficient is small, only 1/2-1/3 of iron or steel; conductive properties, its good electrical properties and is widely used in lighting and welding industry; has good weldability and workability. Heavy alloy is mainly used in aerospace, aviation, military, oil drilling, electrical instrumentation, medical and other industries, can also be used to make a variety of anti-radiation shielding components. Currently heavy alloy belongs to the most important military-industrial applications.


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Tungsten alloy penetrators core tungsten alloy penetrators penetrating kinetic energy is used to destroy armored targets. Tungsten alloy penetrators initial high speed, direct from the large, high-precision firing tank guns and anti-tank gun is the main bomb species. Guns, coastal artillery, anti-aircraft artillery and aviation authorities are equipped with the shells. Can be used to damage tanks, self-propelled artillery, armored vehicles, armored targets such as ships and aircraft, helicopters, cars, rockets, missile launchers transportation / launch vehicle, command vehicle, communication vehicle, radar and other non-armor weapons technology metal structure can also be used to destroy strong fortifications.

 Why do penetrator bomb core tungsten alloy, because tungsten heavy alloy metal combined sequence, there is a high proportion of alloy is the most prominent feature is, we often say that the proportion of high density. Density tungsten alloy can reach 18g/cm3, steel gravity (7.8g/cm3) of 2.3 times. Sectional density tungsten alloy penetrators big heart, help to improve the ability to keep flying speed and penetration ability of steel, in order to improve the armor piercing kinetic energy to provide a possible fatal blow. Tungsten alloy heat; good thermal stability, the projectile during flight and air friction generates a lot of heat, if the piercing heat of filler is that it will not stick together, can not achieve piercing effect. This feature makes tungsten alloy penetrators good play its due effect.


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Various tungsten alloy swaging rod surface finish:

First of all, including forging polishing and cleaning and polishing. Because in the process with some minor irregular surface oxide matte finish, so after forging polished gray. Cleaning polishing refers to the chemical composition of the surface clean.

Secondly, it is a machine developed by centerless polishing. Centerless polishing machine developed by ensuring close tolerances uniform size. Centerless polishing machine developed by providing a bright polished surface.

In addition, also by the polishing process. Polishing process is a typical form of processed parts of the surface. Must be specified in the special rough surface finish.


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1.Rest tungsten alloy rivet bucking bar on inserted rivet and try to locate its point of balance.



2.With gun set in place, use rivet bucking bar to push rivet (and gun assembly) outward. Tungsten alloy rivet bar will then register at right angles to the rivet as it comes to rest on the aluminium.




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