Tungsten containing superalloy GH4098 for aircraft engines
High temperature alloy because of its unique mechanical and physical properties are widely used in aviation, aerospace, ships, electric power, petrochemical and other fields, including tungsten high temperature alloy has more excellent high temperature bearing capacity, commonly used to make a jet engine of turbine blades and other high temperature bearing parts, such as GH4098 alloy, tungsten the mass fraction of 5.5% to 7.0%,Long-term working temperature up to 1000℃;Another example is GH5188 alloy, the mass fraction of tungsten is 14%, which can raise the maximum operating temperature to 1100℃.
Tungsten is an irreplaceable and non-renewable strategic metal resource in the field of national economy and modern national defense. It is a metal element with the highest melting point (3422℃) and has high specific gravity, high hardness and other physical characteristics. It is widely used in aerospace, national defense, military industry, photoelectric information, petrochemical and other advanced and advanced manufacturing fields.
High temperature alloy, also called super alloy, refers to as the base, iron, nickel and cobalt in the high temperature of 600 ℃ above and must stress under the action of the long-term work of the kind of metal material, has excellent high temperature strength, good resistance to oxidation and thermal corrosion resistance, good fatigue properties, fracture toughness and other comprehensive performance, mainly used in aerospace field and energy field. It is reported that in modern advanced aero-engines, the amount of superalloy materials accounts for 40%-60% of the total amount of engines.
GH4098 superalloy products are mainly used to make high temperature parts such as turbine blades, heat insulation screen, tail nozzle and afterburner of aeroengine. Such products produced abroad have been used in the manufacture of aeroengine baffles, stiffeners, aircraft fixed parts, guide blades and other parts with working temperature up to 1000℃.
