GH4099 nickel-based aging high temperature alloy composition, performance and application

GH4099 nickel-based aging high temperature alloy composition, performance and application

GH4099 Introduction:GH4099 (GH99) is a highly alloyed nickel-based aging high-temperature alloy, which is comprehensively reinforced with cobalt, tungsten, aluminum, titanium and other elements to give the alloy a higher thermal strength. It can be used for a long time below 900°C and the operating temperature can reach 1000°C.

The alloy has a stable structure and has satisfactory hot and cold processing and welding properties. It is suitable for the production of high-temperature furniture plate load-bearing welding parts such as automobile engine combustion chambers and afterburners. Large and medium-sized furniture plate parts produced with this alloy can be used directly after aging treatment without tempering treatment. The main equipment includes materials and wires, and can also produce furniture plates and castings.

GH4099 ingredients:

GH4099 (GH99) heat treatment process regulations:

The plates are subjected to air cooling and tensile treatment at 1140~1160℃; the welding rods are subjected to air cooling and tensile treatment at 1100~1140℃.

GH4099 high temperature alloy relative density: ρ=8.47g/cm3

(1) When laser additive manufacturing of GH4099 was performed on an arc additive substrate, the microstructure showed a typical additive microstructure appearance, namely, the internal microstructure grew epitaxially, slender columnar crystals penetrated multiple layers, formed layer bands between layers, and presented equiaxed dendrites on the surface.

The alloy has stable structure and satisfactory hot and cold processing and welding performance. It is suitable for manufacturing high-temperature plate load-bearing welded structural parts such as aircraft engine combustion chambers and afterburners. Large plate structural parts made of this alloy can be used directly after solution treatment without aging treatment. In recent years, the optimization of the composition of GH4099 alloy and the improvement of heat treatment process conditions are important ways to continuously improve the performance of the alloy.

GH4099 is a typical age-hardened nickel-based high-temperature alloy with excellent comprehensive mechanical properties. At present, GH4099 alloy is mainly used in combustion chambers, baffles, reinforcement ribs, aircraft fixtures, blades and other parts of aircraft engines. These parts have complex shapes and high quality requirements, which puts forward high requirements on manufacturing technology.