The performance of cermet cutting tools when machining an Ni-Cr-Mo (En 24) steel
Journal Article
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· Lubrication Engineering
OSTI ID:159575
- South Bank Univ., London (United Kingdom)
Recently developed grades of cermet cutting tool materials, physical vapor deposition (PVD)-coated and uncoated, were used to machine a high-strength and relatively difficult-to-cut steel at cutting conditions typical of finish machining. Comparative tests were carried out with chemical vapor deposition (CVD)-coated (TiC + Al{sub 2}O{sub 3}) carbide inserts at similar cutting conditions. The test results show that the PVD-coated cermet tools outperformed both the uncoated cermet and CVD-coated carbide tools at higher speed conditions due to their increased mechanical and thermal shock resistance as well as the high lubricity of the TiN coating layer. The coated cermet tools were rejected mainly due to the generation of poor surface finish on the machined surface after prolonged machining due to the increased tool-workpiece contact area, with increasing flank wear, which permits access for dislodged hard particles into the interface. Plastic deformation of the cutting edge of the coated cermet tools tends to dampen the machining operation, leading to a reduction in both the cutting and feed forces. 9 refs., 10 figs., 1 tab.
- OSTI ID:
- 159575
- Journal Information:
- Lubrication Engineering, Journal Name: Lubrication Engineering Journal Issue: 2 Vol. 51; ISSN 0024-7154; ISSN LUENAG
- Country of Publication:
- United States
- Language:
- English
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