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Super Alloys

Super alloys are alloys with several basic properties: excellent mechanical strength, resistance to thermal creep deformation, good surface stability and corrosion or oxidation resistance. Examples of such alloys are Hastelloy, Inconel, Waspaloy, Rene alloys, Incoloy single crystal alloys.

The development of superalloys is largely based on both chemical and process innovations. Super alloys improve high temperature resistance through solid solution reinforcement. An important strengthening mechanism is precipitation hardening, which forms secondary phase deposits such as gamma prime and carbides. Oxidation or corrosion resistance is provided by elements such as aluminum and chrome.

Since 2007, Varzene Metal has been working in the chemical industry, aviation, energy, oil and gas, electricity and electronics, nuclear, aerospace, marine, automotive, etc. specializes in the supply of these sophisticated alloys for critical applications such as. Creep and oxidation resistance is of primary importance as superalloys are designed for high temperature applications. Nickel (Ni) based superalloys have emerged as the preferred material for these applications. The properties of these Ni-based superalloys are created not only by metals, but also by certain degrees of addition of many other elements that are both common and exotic, including metalloids and non-metal; chrome, iron, cobalt, molybdenum, tungsten, tantalum, aluminum, titanium, zirconium, niobium, rhenium, yttrium, vanadium, carbon, boron or hafnium are some of the alloys used. Each of these additions has been selected to serve a particular purpose in optimizing properties for high temperature applications.

Ni-based superalloys are excellent high-temperature materials and although proven to be very useful, Co-based superalloys have potentially superior hot corrosion, oxidation and wear resistance compared to Ni-based superalloys. Therefore, efforts have been made in the development of Co-based superalloys in recent years. However, traditional Co-based superalloys have not found widespread use as they have lower strength than Ni-based ones.

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