Siemens Vai Metals Technologies Gmbh

Primetals Technologies Austria Gmbh

Karl Trnka

Franz Wimmer

Heinrich Thoene

Johann Poeppl

Guoxin Shan

Stefan Lechner

Marinko Lekic-Ninic

A roll () for supporting and conveying hot material, including a roll element that has a roll jacket () made of a basic material and a wear coat which is applied to the basic material by means of a surface welding process () using a welding additive which surrounds the surface of the roll jacket. In order to increase the service life of the wear coat, improve the resistance to wear, and reduce the cost for producing the welded-on surface. The basic material of the roll jacket () is steel and contains up to 0.45 percent of C. The welded-on surface () is designed as a single-layer weld, and the wear coat contains 12.5 to 14.0 percent of Cr at least in an external zone that surrounds the surface of the roll jacket. Also disclosed are a method for producing the roll (), a method for repairing a used roll (), a welding additive and a welding rod for producing the welded-on surface.

Process for producing a roll for supporting and conveying hot material, process for repairing a worn roll

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Linz, Austria

Karl Trnka