After the Second World War, the term “superalloy” appeared to describe a high-performance alloy. This type of material was specifically developed to extend the service life of aircraft components exposed to extreme high temperatures. Superalloys are based on nickel, iron, and cobalt, and through the addition of alloying elements to achieve super fusion of various metal characteristics, they can work for a long time at a high temperature above 600 ℃ and a certain stress, and become aerospace, petrochemical, racing, etc. Pillar materials of the industry.
Features and application fields of Inconel 718
Inconel 718 is a precipitation hardening nickel-chromium-iron alloy containing niobium and molybdenum. It was mass-produced in 1965. It can solid dissolve a variety of alloying elements and avoid the precipitation of harmful phases with low ductility. It can maintain high yield strength in high-temperature environments. Good plasticity and good processing performance and structural stability make it an ideal choice for industrial applications in many fields. According to statistics, more than half of the total mass of materials used in contemporary aerospace engines are nickel-based superalloys, and the use of Inconel 718 has exceeded one-third of the total use of nickel-based alloys.
According to the Carnot cycle, operating the engine at a higher temperature can improve energy efficiency, which in turn makes the engine more energy-efficient. From compressors, combustion chambers, turbines to casings that protect and support engines, from many stationary rotating parts in aerospace engines to various bolts and fasteners, Inconel 718 is widely used in the manufacture of high-temperature components for aero engines. Especially for today’s leading aerospace engines, Inconel 718 is used in greater quantities. One third of the quality of GE’s famous CF6 engine is made of this alloy, while Inconel 718 alloy is used in P&W’s PW4000 engine. It is more than half the mass of the engine.
Inconel 718 has become the cornerstone of aerospace applications. At the same time, it is also used in nuclear reactors (heat exchanger tubes), submarines (propeller blades, quick disconnect devices, auxiliary propulsion motors), chemical industry (containers, pumps, valves, pipelines), power generation (Industrial gas turbine), oil and gas industry (downhole pipeline, wellhead hardware, flare arm) and other fields have important applications.
Inconel 718 with stainless steel and titanium alloys
In terms of performance in harsh temperature environments, nickel-based alloys (such as Inconel 718) may be better than titanium alloys or steel. The oxidation protection layer of nickel-based alloys further improves the mechanical properties.
3D printing brings processing and application potential to Inconel 718
Using non-3D printing processes to achieve the design required for nickel-based superalloys may be challenging. When traditional manufacturing methods such as machining, forging or welding are used, annealing is often required before the process starts, and the high temperature corrosion and creep resistance of the parts will be affected. The results of additive manufacturing of Inconel 718 alloy show that the mechanical properties have not been sacrificed and can even exceed the performance of cast or forged parts.
In addition, Inconel 718 is a typical difficult-to-machine material due to its high cutting temperature and serious work hardening. For the complex geometries usually required in aerospace applications, the manufacture of Inconel 718 parts is often very difficult and costly.
Aerospace companies such as GE Aviation have used 3D printed Inconel 718 in aircraft engine manufacturing. While ultimately achieving fuel and cost savings, design freedom, reduced parts, and improved supply chain efficiency have made additive manufacturing the focus of attention in the aerospace industry.
The low-temperature properties of 3D printing super alloys also have potential applications, such as pipes and shells, low-temperature suspension and support systems, impeller or pump structures, valve stems, cooling pipes, heat pipes, heat insulation design, heat exchangers, and gases in high-porosity systems. Storage is very suitable for the application of high-strength superalloys, and its temperature range covers from a low temperature of -273℃ to a high temperature of 760℃.
The development of powder metal and the development of industrial-grade metal 3D printers have promoted dialogue among many industries, thus releasing the advantages of additive manufacturing of super alloys.
HY-industry is qualified Titaniumalloy，Nickelalloy&cobalt alloy materials supplier.
We have more than twenty years experience in kind of High temperature alloy production and have ten years experience in alloy powder.
Inconel 718, Monel 400，Stellite 6，Stellite 12，Incoloy 800ht，Incoloy 901，Nimonic 80A，Kovar，Invar 36，Inconel 625，Hastelloy C276， Incoloy 825，6Al-2Sn-4Zr-2Mo,TI-6AL-4V ELI,TI-6AL-4V,10V-2Fe-3Al are mature productes of us.
When you want to know more about our products, please contact us: