Khamsehzadeh, Houshang (1991) Behaviour of ceramic cutting tools when machining superalloys. PhD thesis, University of Warwick.

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Abstract

The nickel-base superalloys Waspaloy, INCO 901 and INCO
,
718 have been machined with four different types of ceramic
cutting tools. The cutting inserts were pure alumina
(CC620), mixed alumina (CC650), composite ceramic (WG-300)
and finally silicon nitride (Kyon 2000).
Tests in the form of turning were carried out, in dry
and wet conditions, in order to study the behaviour of the
above mentioned cutting tools when machining superalloys.
The cutting speeds employed for these tests were 90, 150,
215 and 300 m/min with feed rates of 0.125 and 0.18 mm/rev
together with depths of cut of 1 and 2.5 mm.
Machining in the presence of different atmospheres was
also performed.
In the majority of cases depth of cut notching (DOCN)
proved to be the domineering factor controlling tool lives
under different cutting conditions. However, flank wear,
nose notch and surface roughness were the other tool failure
modes.
Attrition wear was predominant throughout the tests
which was influenced by the cutting temperatures. The high
temperatures also caused diffusion wear mechanisms to take
effect.

Item Type:	Thesis or Dissertation (PhD)
Subjects:	T Technology > TJ Mechanical engineering and machinery
Library of Congress Subject Headings (LCSH):	Heat resistant alloys, Machining, Ceramics, Metal-cutting tools
Official Date:	May 1991
Dates:	Date Event May 1991 Submitted
Institution:	University of Warwick
Theses Department:	School of Engineering
Thesis Type:	PhD
Publication Status:	Unpublished
Supervisor(s)/Advisor:	Wallbank, J. ; Pashby, I. R.
Extent:	1 v. (various pagings)
Language:	eng

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