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Fe-, And Ni-based MMCs With Fused Tungstencarbide Particle Inclusions By Hot Extrusion

  • : Christian Edtmaier1
  • : 1TU Wien
  • : PDF Download
  • : 2016

Abstract

Fused tungstencarbide severly reacts with iron and nickel matrices respectively during consolidation by sintering, as WC/W2C hard phases are not stable. Consequently the material lacks of a hardness loss and/or decrease in wear resistance. Distinct reactions between the constituents can be effectively supressed by hot extrusion, as heating and consolidation periods are small compared to sintering cycles. Iron and nickel based samples with different thicknesses of the reaction zone were produced by varying the sintering temperature and compared to hot extruded specimen with post thermal treatments. Microscopic characterization was accomplished by XRD and pin–on-disc wear tests.

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