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Powder metallurgy - Near net shape

Production of powder metallurgy (PM) near net shape (NNS) components by hot isostatically pressed (HIPed) metal, alloy or composite powders.

  • Freedom in design – complex geometries are possible
  • Short delivery times due to an abbreviated processing route via powder metallurgy in comparison to conventional manufacturing methods
  • Reduction in welding – additional features can be integrated into the component design versus traditional manufacturing, minimizing the number of weld joints and their inspections
  • Reduced machining – the HIP PM NNS process minimizes cost by reducing machining time and material waste
  • Isotropic mechanical properties provide improvement in strength, ductility and corrosion resistance due to fine, uniform grain size and freedom from segregation
  • Narrow scatter band of mechanical properties – the HIP powder metallurgy NNS technology significantly reduces the scatter in properties versus castings and forgings
  • Minimized hydrogen-induced stress corrosion cracking problems due to fine-grained microstructure
  • Ultrasonic inspectability - even heavy sections can be non-destructively inspected due to the fine, uniform grain structure
  • Weight optimization – HIP PM NNS technology enables the minimalization of material waste by allowing the design of complex geometries and the fabrication of a pore-free product via metal powder processing.

Products manufactured via the powder metallurgy (PM) HIP NNS method include valve bodies; large structural components for aerospace; manifolds in subsea, oil and gas applications; steam turbine applications; and paper mill rolls.

Powder metallurgy HIP NNS product fabrication incorporates many types and grades of materials including, but not limited to:

  • Ferritic, austenitic, martensitic and duplex stainless steels
  • Low alloy steels
  • Tool steels
  • High temperature high strength steels
  • Superalloys.

The powder metallurgy HIP NNS process enables fabrication of complicated geometries, thereby producing a component with minimised finishing operations. Bodycote’s expertise encompasses the entire process from capsule design based on the customer’s final part specifications through powder encapsulation, densification and quality assurance.