Wear Test And Testing Of Nitrided Tools With A Narrow And Deep Gap In Aluminium Hot Extrusion
Author(s)
M. Terčelj, R. Turk & P. Cvahte
Abstract
Wear test and testing of nitrided tools with a
narrow and deep gap in aluminium hot
extrusion
M.Tercelj,^ R.Turk,^ P.Cvahte^
^Department of Materials and Metallurgy, University of Ljubljana,
Askerceva 12, Slovenia
®IMPOL d.d., 2310 Slovenska Bistrica, Slovenia
Abstract
Laboratory testing of extrusion tool wear is practical and less expensive than
direct observation of wear on real tools during industrial operation. Its efficiency
is expressed mainly as the control of influential parameters of tribological
system, the way of mechanical loading, and as reduction of time needed for the
estimation of tool life. In order to approach with our testing conditions to the true
physical characteristics of hot extrusion process and to intensify (i.e. shorten) the
process of wear analysis, a test named "block on disc" was developed, enabling a
high normal pressure between aluminium and tool, and a good temperature
control of Al disc. A specially shaped tool with 1 and 4 mm narrow gap was
developed
Keywords
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