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Machinability analysis of cemented carbide -A theoretical and experimental study

Sörén, Oskar LU (2016) MMTM01 20152
Production and Materials Engineering
Abstract
Sandvik Coromant is the market leader of producing tools for advanced metal
cutting. The tools are produced in cemented carbide, however Sandvik Coromant
does not produce tools for machining cemented carbide. The aim of the thesis was
to perform cutting tests in cemented carbide with diamond tools to investigate if
the binder content affected the machinability of the process.

The wear tests were performed in cemented carbide with two different binder
contents H10F and H15F. H10F consist of 10% cobalt and 90% tungsten carbide
while H15F consist of 15% cobalt, 84.3% tungsten carbide and 0.7% other. Two
different types of tools were used in the experiment, a diamond coated cemented
carbide ball nose mill and a nano-polycrystalline... (More)
Sandvik Coromant is the market leader of producing tools for advanced metal
cutting. The tools are produced in cemented carbide, however Sandvik Coromant
does not produce tools for machining cemented carbide. The aim of the thesis was
to perform cutting tests in cemented carbide with diamond tools to investigate if
the binder content affected the machinability of the process.

The wear tests were performed in cemented carbide with two different binder
contents H10F and H15F. H10F consist of 10% cobalt and 90% tungsten carbide
while H15F consist of 15% cobalt, 84.3% tungsten carbide and 0.7% other. Two
different types of tools were used in the experiment, a diamond coated cemented
carbide ball nose mill and a nano-polycrystalline diamond ball nose mill.

The wear tests were performed in a 5-axis mill from Mikron HSM200uLP and the
tool wear was measured in an optical 3D microscope from Alicona. The surface of
the workpiece was examined using a scanning electron microscope (SEM) and the
surface roughness using a 3D optical microscope from Veeco in Västberga.

The results show that the machinability is not affected by a change in binder
content from 10 to 15% cobalt. Tool life and surface quality are more dependent on tool shape and tool material. The surface roughness obtained in the experiments range from 0.12 μm to 0.38 μm in Ra. Since the experiment did not focus on obtaining the optimal surface roughness it could be possible to select different cutting data in order to optimize the surface roughness.

Future work could include testing of other tool materials such as nbcBN. (Less)
Please use this url to cite or link to this publication:
author
Sörén, Oskar LU
supervisor
organization
course
MMTM01 20152
year
type
H2 - Master's Degree (Two Years)
subject
keywords
Cemented carbide, Milling, Sandvik Coromant
language
English
id
8862524
date added to LUP
2016-04-04 10:14:20
date last changed
2016-04-04 10:14:20
@misc{8862524,
  abstract     = {Sandvik Coromant is the market leader of producing tools for advanced metal
cutting. The tools are produced in cemented carbide, however Sandvik Coromant
does not produce tools for machining cemented carbide. The aim of the thesis was
to perform cutting tests in cemented carbide with diamond tools to investigate if
the binder content affected the machinability of the process.

The wear tests were performed in cemented carbide with two different binder
contents H10F and H15F. H10F consist of 10% cobalt and 90% tungsten carbide
while H15F consist of 15% cobalt, 84.3% tungsten carbide and 0.7% other. Two
different types of tools were used in the experiment, a diamond coated cemented
carbide ball nose mill and a nano-polycrystalline diamond ball nose mill.

The wear tests were performed in a 5-axis mill from Mikron HSM200uLP and the
tool wear was measured in an optical 3D microscope from Alicona. The surface of
the workpiece was examined using a scanning electron microscope (SEM) and the
surface roughness using a 3D optical microscope from Veeco in Västberga.

The results show that the machinability is not affected by a change in binder
content from 10 to 15% cobalt. Tool life and surface quality are more dependent on tool shape and tool material. The surface roughness obtained in the experiments range from 0.12 μm to 0.38 μm in Ra. Since the experiment did not focus on obtaining the optimal surface roughness it could be possible to select different cutting data in order to optimize the surface roughness.

Future work could include testing of other tool materials such as nbcBN.},
  author       = {Sörén, Oskar},
  keyword      = {Cemented carbide,Milling,Sandvik Coromant},
  language     = {eng},
  note         = {Student Paper},
  title        = {Machinability analysis of cemented carbide -A theoretical and experimental study},
  year         = {2016},
}