Tungsten copper military nozzle can be used for a variety of purposes.Tungsten copper military nozzle is an indispensable piece of equipment in many devices employing fluid as a working medium. The reaction force that results from the fluid acceleration may be employed to propel a jet aircraft or a rocket. Most military jet aircraft employ the simple convergent conical nozzle, with adjustable conical angle, as their propulsive device.

And tungsten copper military nozzle is also used in solid rocket motor. Solid rocket motor has four components mainly the shell, solid propellants, nozzle components and ignition devices. The formula of solid propellant and molding process, nozzle’s design and materials and manufacturing process, shell materials and manufacturing process are the most important link, which directly affects solid engine performance.

Tungsten copper alloy with high melting temperature and ablation resistance will be the best materials for rocket motors.


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In generally, when tungsten content is less than 90%, comprehensive properties of tungsten alloy decrease for overmuch binder phase. The decreasing of properties is primary shown that tensile strength and density of tungsten alloy is low, which cannot satisfy with the requirement of density and tensile strength. With the increasing of tungsten content, tensile strength of tungsten alloy increases slightly. However, with the increasing of sintering temperature, tungsten grain in tungsten alloy coarsens and elongation of tungsten alloy descends.

When tungsten content reaches 93%~95%, tungsten alloy has ideal microscopic structure. Tensile strength and elongation are the best. Continuation of adding tungsten content will make tungsten grain large and contact with tungsten grain will be increased consumedly too. Tensile strength of tungsten alloy decreases significantly. The elongation of tungsten alloy decreases closely to line with the increasing of tungsten content. When tungsten content is more than 97%, tensile strength and elongation decrease significantly. When tungsten content is more than 98%, the elongation of tungsten alloy is closed to zero. So, to achieve better comprehensive properties, the tungsten content is usually controlled between 90% and 96%.


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Ductility of tungsten alloy is very sensitive to residual porosity. For tungsten alloy whose tungsten content is 94%~97%, when porosity in alloy is only 1%~1.5%, tungsten alloy will be tendered completely. There are 4 reasons for causing pore containing excessive burning, rapid cooling and solidification, volatile elements existing in tungsten alloy and uneven sintering.

When tungsten pellet being spheroidized completely, connectivity of tungsten pellet is the lowest and elongation of tungsten alloy reaches maximum with that. Then pore will grow with the increasing time of sintering. Tungsten alloy will tender. When liquid sintering is finished, hydrogrn spreads rapidly in solidifying liquid phase and it causes shrinking pore when liquid phase is solidified. For that liquid phase should cool slowly. When cooling rate is higher than 10℃/min, tungsten alloy will cause more pore pores and ductility of tungsten alloy will descend. For sample whose size is large, when cooling rate is low, tungsten alloy will cause pore because of gaseous diffusion and solidifying contraction.


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Applications:
1.Sintered tungsten tubes are widely applied in industry furnace such as sapphire growth furnace, quartz glass melting furnace, and rare earth smelting furnace since the melting point of tungsten has reached 3410℃; 
2.Tungsten tubes are more and more widely used in solar, photovoltaic industry and quartz glass melting field because of its high utilization.

Features:
1.The overall density of sintered tungsten tube is between 18g/cm3 to 18.3g/cm3;
2.Its purity is over 99.95%

Tungsten Manufacturer & Supplier: Chinatungsten Online - http://www.chinatungsten.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email: sales@chinatungsten.com
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