2012-06-29

Advantages of Tungsten Alloy Cube for Military Application

We can produce all kinds of tungsten alloy cubes and we can design tungsten alloy cube which could be manufactured as the parts of military defense,tungsten alloy cubes for military is widely used in extrusion die, some counterweights, such as yacht counterweights, vehicle counterweights, airplane counterweights, helicopter counterweights, boat counterweights, tank counterweights, etc.
Why we adopt tungsten alloy cube for parts of extrusion die instead of lead or aluminum or other materials' block? Because tungsten alloy has high melting point more than ten times higher than lead, which is important in extrusion die process. Then, tungsten alloy has high Mohs hardness. What is the most important reason is that tungsten alloy is environment friendly, which lead can not reach.
Since at least World War II, tungsten alloys have proven their worth in ordnance applications. Hyper-velocity armor-penetrating applications use our materials in balls, cubes, and projectile shapes. Manufacturing techniques and additives allow us to vary certain properties, such as elongation, ultimate tensile strength, and hardness, of our tungsten alloys in order to meet your needs.

Tungsten Combustion Chamber of Turbo Engines

Conventional combustion chambers are generally of optimized rating for take-off or near take-off operation. This signifies that, in the primary zone of the combustion chamber, a fraction of the air flow of the compressor is introduced so that, with the injected fuel, the fuel-air mixture in this zone would be essentially stoichiometric in turbo engines. Under these conditions, due to the levels of temperature and high pressures, as complete as possible a combustion is obtained, combustion yields greater than 0.99 are attained, the speeds of the chemical reaction being optimum for these stoichimoetric mixtures. 
In addition, the pressures and temperatures at the outlet of the compressor are lower; the result is that the chamber, with the partial charge is very much maladjusted and that the slow speed combustion efficiency rarely goes beyond 0.93. The combustion is, therefore, very incomplete, which means much higher concentrations of carbon monoxide and unburnt residues at the exhaust than under normal operation. The proportions of the pollutants are all the higher, the lower the total yield of the combustion. 
The fresh gas/burnt gas mixture must also be advantageous because it contributes to the increase in the temperature of the carburized mixture and, therefore, aids in its atomization and consequently permits an improvement in the speed of the chemical reaction. In conventionally allowing this contact of the carburized mixture with the high temperature gas from the combustion it is desirable to arrange for a recirculation of the latter by searching for a convenient turbulence level.
All of these solutions, which allow an improvement in the combustion yield have, however, a maximum efficiency only for values sufficient for the pressures and temperatures of the air at the chamber inlet.