Sulzer Brothers Limited

Gerard Barbezat

Roger Dekumbis

Bruno Walser

Marc-Olivier Borel

Heinz Luscher

Ulrich Ritter

An at least substantially amorphous granite layer is applied thermally onto a metal roller in order to form a glazing surface on the roller for use in a papermaking machine. The particles of the granite layer are applied using a plasma jet with the particles being fused in the plasma jet and accelerated onto the substrate formed by the peripheral surface of the roller.

Metal paper glazing roller for a paper machine

A wear layer is provided for each of a piston and cylinder of an internal combustion engine in which ash-producing fuels of solid-liquid mixtures are combusted. Each layer consists of a hard phase and a second phase of lower hardness and greater toughness. Each wear layer has a minimum thickness of one millimeter; the hard phase has a minimum hardness of 1900 HV with a mean chord length in the running direction of from 30 to 200 microns. There is a metallurgical bond between the phases in the wear layer as well as between the wear layer and the substrate. In addition, the hard phases of the respective wear layers have an almost equal hardness value.

Wear layer for piston and cylinder of an internal combustion engine

To increase abrasion resistance, a cast-iron roll is given a carbidic running-surface layer which has a defined depth of at least 1 mm and a fine-grained structure whose cementite dendrites have a length of at most 100 .mu.m and a thickness of at most 20 .mu.m. The fine-grained structure is produced by remelt hardening of the outer surface of the roll.

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Zell, Switzerland

Gerard Barbezat