Powder Metallurgy

Powder Metallurgy (PM) is a process where solid components are produced from metal powder. Kennametal Stellite offers the following two PM processes:

  1. Press and Sinter -- powder and binder are mixed, then compressed into a mould, forming a "green" part. 
  2. Extrude and Sinter -- powder and binder are mixed, then extruded through a die plate, forming a "green" part.

Several green parts are sintered in a vacuum furnace, which raises the temperature to just below the alloy's melting point. During the sintering process, the diffusion of metal atoms between alloy particles produces strong bonds between the particles.  

Powder Metallurgy is typically utilized when:

  1. Surface finish is typically 125 RMS, with dimensional control dependent on part size and geometry
  2. Components weigh less than 0.5 lbs and have a maximum surface area of 2.5" x 2"
  3. Small, geometrically simple shapes up to 1" diameter and up to 40" long
  4. High volume production quantities.

Benefits of Powder Metallurgy

Superior Quality

  • Finished components have a very fine grain size and full density.
  • This technology produces components with uniform microstructures, free from non-metallic inclusions and defects.

Improved Wear Resistance

  • Powder Metallurgy components have outstanding wear resistance and mechanical properties, as well as provide exceptional reliability.

Design Flexibility

  • A variety of shapes can be extruded, such as: diamond, wedge, rectangular and circular sections.
  • Small simple shape extrusions are excellent for hardfacing consumables, cutters and wear pads.