The Evolution Of Cemented Carbide
Flow control is crucial within the oil and gas industry. Therefore, choke valves in numerous variations and dimensions are essential components for controlling the pressure and flow of good products. Having to endure severe conditions of multi-flow media, these components may suffer extreme mass loss by exposure to solid particle erosion and acidic corrosion. Maintaining or replacing worn-out parts is by far the least desirable option in the long term. Instead, choosing the most durable and reliable solution that easily withstands erosion as well as corrosion is preferable.
For such situations, cemented carbide have been a well-proven solution: high hardness, wear resistance, and toughness, combined with other mostly adaptable, high-performance characteristics, make cemented carbide the ideal material for numerous applications.
Most cemented carbide use a cobalt binder phase. But due to their limited corrosion resistance and they are being prone to binder leaching, pure WC-Co carbides are often not suitable for application fields where corrosion is likely to occur. The only solution is to use materials such as Co/Cr, Co/Ni, or Ni/Cr rather than pure cobalt binders.
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