GH4099 is a Ni-Cr-based precipitation-hardening deformed superalloy, which can work at a long-term service temperature of less than 900 °C, and a short-term maximum service temperature of up to 1000 °C. The alloy is solution strengthened by the addition of chromium, cobalt, tungsten and molybdenum, the addition of aluminum and titanium to form an aging strengthening phase, and the introduction of boron, paving and magnesium elements for the purification and strengthening of grain boundaries. GH4099 alloy not only has high thermal strength and microstructure stability, but also shows satisfactory cold and hot working forming and welding process performance. This makes it ideal for the manufacture of high-temperature welded structural parts such as aero engine combustion chambers and afterburners. The main products of the alloy include hot-rolled bars, plates, wires and forgings, etc.
High-temperature welded structural parts refer to aero-engine combustion chambers, afterburners and other components that work under extremely high temperature conditions, which require materials to maintain stable structure and performance in high-temperature environments, and have good welding performance. GH4099 alloy performs well in this regard, because it can maintain high strength and structural stability at long-term service temperatures below 900, and at the same time, the maximum service temperature can reach 1000 for short periods of time, which meets the needs of high-temperature working environments.
The basic properties of GH4099 alloy include high thermal strength and microstructure stability. The chromium, cobalt, tungsten and molybdenum elements added to the alloy are solution strengthened to maintain their strength at high temperatures. At the same time, aluminum and titanium elements are introduced to form an age-strengthening phase, so that the alloy can maintain stability even at the maximum service temperature for a short time. In addition, the addition of boron, paving, and magnesium purifies grain boundaries, strengthens the structure of the material, and improves its overall properties.
GH4099 alloy has a wide range of applications, especially suitable for the manufacture of aero engine combustion chambers to process adjustable nozzle housings, afterburner cylinders and other parts. Its hot-rolled bars are used to make compressor blades for aero engines, while forged bars are used to make structural components for large marine gas turbines and cruise missiles.
In terms of material technical standards, GH4099 follows GB T14992, GJB1952A, HB5332, HB5333, HB Z140, DT0160018, DT0160020, DT0160021 and other related standards to ensure the reliability and consistency of its production and application. In terms of smelting process, GH4099 adopts vacuum induction furnace 10 electroslag remelting, or vacuum induction furnace 10 vacuum arc remelting process to ensure the quality and purity of the material.
Overall, GH4099 alloy has become an ideal material for manufacturing high-temperature welded structural parts with its excellent high-temperature performance, thermal strength and welding performance, providing reliable support for the aviation industry.