Cold Isostatic pressing and hot isostatic pressing Powder Metallurgy (PM) Advantages

  • Uniform strength in all directions: The pressure used to compact the powder is applied equally in all directions.

  • Uniform density: The resulting compacted piece will have uniform shrinkage during sintering or hot isostatic pressing with little or no warpage.

  • Shape flexibility: Isostatic pressing makes it practical to produce shapes and dimensions that are difficult or impossible to produce by other methods.

  • Component size: Wide range of component sizes can be made from massive 30 ton near net PM shapes down to densifying less than 100 gram MIM parts.

  • Larger parts: Part sizes are limited only by the size of the isostatic pressure chamber.

  • Low tooling cost: For short production runs, the tooling cost is low in comparison to other manufacturing methods.

  • Enhance alloying possibilities: Able to enhance alloying elements without inducing segregation in the material.

  • Reduced lead times: Complex shapes can be economically made from prototype to production quantities with significantly reduced lead times versus forgings or machined components.

  • Material and machining costs: Near net shape parts can be fabricated, greatly reducing material and machining costs.

CIP PM Advantages

  • High green strength: Increased possibilities for machining the compact in its green state.

  • Difficult to press materials: Powders can be isostatically pressed dry without water, lubricants, or binders.

HIP PM Advantages

  • Improved mechanical properties: Improved mechanical properties such as impact resistance, ductility, and fatigue strength as a result of internal porosity elimination. Equal or better than wrought.

  • Isotropic Properties: Fine grain structure achieving part uniformity.

  • Predictability: Greater confidence and predictability of part life due to decreasing variation in mechanical properties.

  • Wear/corrosion resistance: Improved wear and corrosion resistance via the hot isostatic pressing PM route through cladding, extended alloying possibilities, control of grain size and shape, and producing homogeneous microstructures.

  • Diffusion bonding: Enables diffusion bonding of similar and dissimilar materials, either in powder or solid form.

  • Reduction in welds: Components can be designed and fabricated with a reduction, or complete elimination, in the number of welds and related inspections.

  • Expensive Material Reduction: By cladding, components can be formed with premium/expensive materials in critical regions only.

Advantages of Hot Isostatic Pressing Casting

  • Predictability: Consistency of mechanical properties improved.

  • Mechanical properties: Increased tensile strength, impact strength, and ductility.

  • Improved surface finish: Removes internal porosity enabling smooth, pore free wear surfaces.

  • Extended service life: Fatigue life significantly increased achieving properties comparable to similar wrought alloys.

  • Opens new markets: Improved properties allows penetration into new markets.

  • Rejuvenation: Removes service induced porosity enabling rejuvenation of castings.

  • Salvage: Allows salvage of rejected castings based on x-ray inspection.

  • Quality cost: Improved and more consistent properties reducing quality assurance costs in combination with decreased scrapped castings.

  • Manufacturing costs: Allows improved casting techniques such as reduced gating and feeding.

Review hot isostatic pressing and cold isostatic pressing applications.

View award-winning powder metallurgy parts made via isostatic pressing.