Tribological evaluation of TiN and TiAlN coated PM-HSS gear cutter when machining 19MnCr5 steel

Two PVD coated powder metallurgy high speed steel (PM-HSS) gear cutters were investigated when machining helical gears made from AISI 19MnCr5 steel with hardness between 140 and 180 HV. Machining trials were carried out with gear cutters coated with TiAlN (nano layers) and TiN (mono layer). Crater a...

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Bibliographic Details
Published in:International journal of advanced manufacturing technology 2007-01, Vol.31 (7-8), p.629-637
Main Authors: dos Santos, J. A. B. O., Sales, W. F., Santos, S. C., Machado, A. R., da Silva, M. B., Bonney, J., Ezugwu, E. O.
Format: Article
Language:English
Subjects:
Abrasion
Abrasives
Chipping
Chromium manganese steels
Cutters
Delamination
Gear cutters
Helical gears
High speed tool steels
Machining
Powder metallurgy
Tool wear
Tribology
Wear mechanisms
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Summary:Two PVD coated powder metallurgy high speed steel (PM-HSS) gear cutters were investigated when machining helical gears made from AISI 19MnCr5 steel with hardness between 140 and 180 HV. Machining trials were carried out with gear cutters coated with TiAlN (nano layers) and TiN (mono layer). Crater and flank wears were measured and analysed after all the machining trials. Analyses of the worn tools show that the TiAlN coated gear cutter performed better than the TiN coated gear cutter. This can be attributed to its nano layers and the higher hardness of the TiAlN coating. The dominant tool wear mechanisms were adhesion, abrasion, delaminating of the coating layer and chipping of the cutting edge.
ISSN:0268-3768
1433-3015
DOI:10.1007/s00170-005-0242-3