The tungsten wire can be used as the core in the cavity of the melting model, and the liquid metal can be poured into it to wrap it, similar to the structure of steel and concrete, which does not affect the casting fluidity, but also can increase the high-temperature strength of the blade turbine, because the large amount of tungsten can reduce the cost. Maybe it's worth a try. The tungsten carbide is of great weight and quantity, and is used for armour-piercing projectiles and missile warheads. Metallurgical roller for industrial use, blade for machine tool, etc.
The main material is not breakthrough, can withstand high temperature and high pressure material can not be afraid of high temperature is not afraid of high strength! Of course, with the high energy density battery, the fuel engine is bound to be phased out, which requires breakthroughs in materials, semiconductor technology, a variety of material breakthroughs, as well as ultra-solid welding technology.
The engine uses the Carnot cycle to calculate the thermal efficiency. When the temperature drops from 1800 degrees to 1000 degrees, the thermal efficiency only drops by 6% to 8%, which is nothing at all for the fuel consumption of military aircraft, but makes the material more difficult. Therefore, the cry that the material is not good is produced by Hu Li's strategic bludges.
1.Pure tungsten ductile brittle transition temperature 550℃, high temperature use toughness is not poor, melting point as high as 3410℃.
2. Tungsten's density is as high as 19.3, close to that of gold, which is the key limiting its application in aerospace. The low density of the same group molybdenum element is widely used in aerospace.
3. The rhenium effect is only shown in a small number of metals. Adding rhenium to tungsten can significantly improve the strength and toughness, and plasticity can be shown at room temperature, which is called rhenium effect. MSG is a far cry from that.
4. At present, the ratio of rhenium used in aero-engine blades is not low, and hearsay is not credible.
In fact, the density of rhenium is higher than that of tungsten. The reason why rhenium alloy is used to replace tungsten alloy in hanghair blades is not because of their density, but because tungsten in blades is easy to oxidize when hanghair runs at high temperature, which will lead to the decline of the overall thermodynamic performance of blades and affect the service life of hanghair blades. Compared with rhenium alloy to do the thermodynamic performance of the blade is more stable, do longer sailing life! One of the bottle stems encountered by China's aviation manufacturing is the lack of domestic rhenium resources!
