Understanding OM 26R: A Comprehensive Guide
OM 26R, also known as R26, is a precipitation-hardening type of deformation superalloy. It is a Fe-Ni-Co-Cr based alloy that is renowned for its exceptional properties and wide range of applications. In this detailed guide, we will explore the various aspects of OM 26R, including its composition, properties, applications, and processing techniques.
Composition and Properties
OM 26R is a high-performance superalloy that is designed to withstand extreme temperatures and aggressive environments. The alloy is primarily composed of iron (Fe), nickel (Ni), cobalt (Co), and chromium (Cr). It also contains small amounts of molybdenum (Mo) and titanium (Ti) to enhance its strength and stability.
| Element | Percentage |
|---|---|
| Iron (Fe) | Balance |
| Nickel (Ni) | 15-20% |
| Cobalt (Co) | 8-10% |
| Chromium (Cr) | 15-18% |
| Molybdenum (Mo) | 0.5-1.5% |
| Titanium (Ti) | 0.5-1.5% |
The addition of these elements results in a material that has excellent strength, toughness, and resistance to corrosion and oxidation. OM 26R has a long-term use temperature range of 540-570掳C, with a maximum use temperature of up to 677掳C.
Applications
OM 26R is used in a variety of industries due to its exceptional properties. Some of the most common applications include:
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Ground steam turbines: OM 26R is used to make fasteners, such as bolts, that are used in ground steam turbines. These fasteners can withstand the high temperatures and pressures of the steam environment for extended periods of time.
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Aerospace: The alloy is used in the aerospace industry to make turbine engine fasteners and blades. Its ability to withstand high temperatures and stresses makes it ideal for these applications.
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Power generation: OM 26R is used in power generation plants to make components that are exposed to high temperatures and aggressive environments.
Processing Techniques
OM 26R is processed using a variety of techniques to ensure that it meets the required specifications. The following are some of the most common processing techniques:
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Forging: OM 26R is typically forged at temperatures ranging from 1050掳C to 1140掳C. The forging process is used to shape the alloy into the desired form.
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Heat treatment: OM 26R is heat treated to achieve the desired mechanical properties. The heat treatment process involves heating the alloy to a specific temperature and then cooling it at a controlled rate.
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Machining: OM 26R can be machined using conventional machining techniques. However, it is important to use low-speed, light cuts, and slow feed rates to avoid tool wear and improve surface finish.
Conclusion
OM 26R is a high-performance superalloy that is used in a variety of industries due to its exceptional properties. Its ability to withstand extreme temperatures and aggressive environments makes it an ideal material for applications in the aerospace, power generation, and ground steam turbine industries. By understanding the composition, properties, applications, and processing techniques of OM 26R, engineers and manufacturers can ensure that they are using the right material for their specific needs.
