Special armouring for rubber extruders
In a great number of cases armouring with traditional
resurfacing materials, such as stellites, has not
By rubber processing a very high surface pressure arises between screw
hard facing and cylinders wall. This comes about
due to unequal force balances during the pulling in of the mostly only
slightly tempered rubber strips.
The pressure stresses arising from this, also called sigma tension,
exceed the boundary values of the stellites by far.
Occasionally, an armoured screw with stellite has only the half service
life as a normally nitrated screw.
From this reason we employ a nitrate adaptable armouring material.
This material has already after the welding a basic hardness of approx. 50 HRC
and is afterwards also nitrated. The resulting supporting-effect from
the high basic hardness with respect to the nitrate layer improves the
wear resistance considerably with respect to normally nitrated screws.
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Matthias Brenner, Dipl.Phys. | E-Mail: firstname.lastname@example.org | http://www.ock.de
Programmierung von Jürgen Ernst, Dipl.Ing. (FH) | http://www.juergen-ernst.de
Aktualisiert am: 09.01.2014