Tungsten alloy still have important applications in cutting-edge science such as rockets, missiles, recoverable spacecraft and nuclear reactors. This is due to the excellent physical, mechanical, corrosion resistance and nuclear properties of tungsten alloy. Such as tungsten alloy in the high temperature of 1900℃, the strength is still 44 kg/mm 2, in such high temperature, whether steel or heat-resistant super alloy is also melted into a liquid, tungsten is mainly used to make do not need cooling of various types of rocket engine throat lining; Made of silver-impregnated tungsten nozzle can withstand the high temperature of more than 3100℃, for a variety of types of missiles and aircraft; The rocket nozzle made of tungsten fiber composite material can withstand 3500℃ or higher temperature and can be used as corrosion resistant equipment and components in the chemical industry, and can be used as lubricant, pigment and catalyst for various reactions.
Tungsten alloy throat lining is solid rocket engine nozzle throat lining material. When the rocket is launched, the gas is accelerated to the sound speed through the nozzle throat to generate 65%-75% thrust, which is tested under high temperature and pressure in the nozzle throat. Therefore, the material of the lining directly affects the performance of the rocket engine.
Solid rocket motor is a chemical rocket motor which USES solid propellant. It consists of propellant column, combustion chamber, nozzle assembly and ignition device. The rocket engine nozzle belongs to convergent - diffusive nozzle (namely laval -DeLaval nozzle), which is composed of inlet segment (convergent segment), throat (throat lining), and outlet cone (diffusion or expansion segment). Its function is to convert the heat energy of combustion products into the kinetic energy of high-speed jet so as to generate thrust. Expansion ratio, that is, the area ratio between throat and nozzle, directly affects the performance of the engine. A well-designed nozzle has a great impact on the performance of the engine.