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Related Concept Videos

Steel Manufacturing01:26

Steel Manufacturing

528
Steel manufacturing is a multi-stage process that begins by smelting iron ore into cast iron in a blast furnace. This initial stage involves layering iron ore with coke, a type of fuel, and crushed limestone within the furnace. The coke is ignited with a high volume of air, leading to the creation of carbon monoxide, which acts to reduce the iron ore to pure iron.
During this smelting process, limestone plays a crucial role by forming slag. Slag captures impurities within the molten iron, such...
528

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Material Extrusion to Manufacture Carbide-Based Advanced Cutting Tools.

Gonçalo Oliveira1, Ana Senos2, Cristina Fernandes3

  • 1Centre of Mechanical Engineering, Materials and Processes (CEMMPRE), University of Coimbra, Rua Luis Reis dos Santos 290, 3030-788 Coimbra, Portugal.

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|November 14, 2023
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Summary
This summary is machine-generated.

Material extrusion (MEX) is a viable 3D printing method for hardmetal cutting tools, but requires homogeneous filaments for cermets to avoid microstructural defects and hardness reduction.

Keywords:
additive manufacturingcermetcoolingcutting toolsmaterial extrusiontungsten carbide

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Area of Science:

  • Materials Science
  • Additive Manufacturing
  • Manufacturing Engineering

Background:

  • Advanced cutting tools with internal cooling systems can be produced using material extrusion (MEX).
  • MEX requires preparing hardmetal and cermet feedstock into 3D printable filaments.
  • Post-shaping processes include debinding and sintering for densification.

Purpose of the Study:

  • To investigate defects and microstructural heterogeneities in hardmetal and cermet cutting tools produced by MEX.
  • To compare the properties of MEX-produced tools with those made by traditional pressing and sintering.

Main Methods:

  • Material extrusion (MEX) 3D printing of hardmetal (WC-Co) and cermet (Ti(CN)/WC-Ni/Co) filaments.
  • Debinding and sintering of printed green parts.
  • Microstructural analysis and hardness testing.
  • Comparison with conventionally manufactured (pressing and sintering) samples.

Main Results:

  • MEX is a viable method for producing hardmetal cutting tools, yielding similar microstructures and hardness to pressing and sintering.
  • Cermet (Ti(CN)/WC-Ni/Co) filaments produced by MEX were heterogeneous.
  • MEX-produced cermet microstructures were heterogeneous, leading to a significant decrease in hardness compared to conventionally manufactured samples.

Conclusions:

  • Material extrusion (MEX) shows promise for manufacturing hardmetal cutting tools.
  • Further development is needed to create homogeneous filaments for cermets to ensure consistent properties and performance.
  • MEX offers potential for advanced cutting tool geometries but requires material-specific optimization.