Gas turbine is a source of energy widely used, but not everyone knows its operation. First of all, it is fueled by natural gas and it is generally composed of three parts: the compressor which increases the pressure of the gas, the combustion chamber in which the methane is burned and from which you get an exhaust gas at very high temperatures, and finally the turbine itself, formed by the blades.
Kinetic energy is converted into mechanical energy able to rotate the turbine. Forces and overheating (1200-1600 ° C) to which the blades are subjected are the biggest problems for engineers. For this reason, ceramic coatings and cooling systems have been developed, but the main precaution is the choice of material. Superalloys are preferred due to the mechanical strength and corrosion resistance.
R & D directed last analysis studying lighter superalloys and assessing the effects of heat treatment on mechanical properties of materials. A good heat treatment is in fact able to significantly improve the characteristics. The superalloy Inconel 718, for example, involves the solubilization at 980 ° C, followed by cooling and aging, but each alloy has its own process. Anyway it is very important that these treatments are performed flawlessly in all phases of heating and cooling.
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