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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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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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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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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