ANALYSIS OF THE RELIABILITY OF CERAMIC PARTS
AFTER HYDROABRASIVE MACHINING
V. V. Kuzin,
N. R. Portnoi,
S. Yu. Fedorov,
and V. I. Moroz
Translated from Novye Ogneupory, No. 11, pp. 63 – 68, November, 2015.
Original article submitted October 5, 2015.
A relationship has been experimentally established between the parameters of hydroabrasive machining on the
one hand and the morphology of the working surfaces and geometry of VOK71 plates on the other hand. It is
determined that hydroabrasive machining significantly improves the reliability of the plates by favorably
changing the morphology of their working surfaces and cutting edge and improving the radius of curvature of
the cutting edge.
Keywords: hydroabrasive machining, oxide-carbide ceramic, morphology, roughness. cutting plate, wear.
Failure rate and accrued operating time are important
quantitative indices of the reliability of machine parts .
These characteristics are also of critical importance for ce-
ramic parts and tools under different service conditions
[2 – 6]. Designers thus prefer to design new machines with
the use of elements and functional components that have a
proven reliability, and process engineers prefer to use
time-tested cutting tools made of hard alloys when they are
developing new machining technologies. These circum
stances are seriously restricting the use of ceramic parts and
tools in the creation of innovative products and processes. To
change this situation, it is necessary to solve a key scien
tific-technical problem – guarantee the necessary reliability
of ceramic parts and tools under defined service conditions
[7 – 9].
One effective approach being taken to solving the prob
lem just mentioned is the development of methods for con
trolling the surface layer. Such methods can reduce the rate at
which ceramic parts suddenly fail during use by reducing the
number of surface defects, which initiate the wear and frac
ture of ceramics under external loads . Methodological
approaches to developing methods of controlling the surface
layer were analyzed in detail in . In particular, these ana
lytical surveys showed the excellent prospects of jet machin-
ing for controlling the condition of the surface of ceramic
products. A detailed examination was made in  of the ef-
fect of air-abrasive machining on the service properties of ce-
ramic parts. However, there is no similar systematic data for
The goal of this investigation is to study the effect of
hydroabrasive machining on the reliability of parts made of
oxide-carbide ceramics when those parts are subjected to
extreme service loads (VOK71 cutting plates are used as an
METHOD OF INVESTIGATION
Four-sided plates of oxide-ceramic VOK71 with dimen
sions of 12.7 ´ 12.7 ´ 4.76 mm underwent hydroabrasive
machining on a model-2G Bulldog unit. This unit has three
chambers (one working chamber and two auxiliary cham
bers) and two working tables that are fed alternately into the
working chamber (machining zone). This arrangement
makes the machining cycle continuous. Figure 1a presents a
schematic diagram of hydroabrasive machining on this unit.
Plates 1 are located in the seats of cassette 2. The plates
are of a certain shape and dimensions, which keeps them
from “flying” out of the seats during the machining opera
tion. The cassettes and their plates are installed on working
tables 3 in one of the auxiliary chambers of the unit and are
then fed into the working chamber (Fig. 1b ), where the
hydroabrasive machining of plates takes place. The hydro
Refractories and Industrial Ceramics Vol. 56, No. 6, March, 2016
1083-4877/16/05606-0631 © 2016 Springer Science+Business Media New York
Moscow State Technological University “Stankin”, Moscow,
OAO “Sandvik-MKTS”, Moscow, Russia.