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

US8845501B2 · kind B2 · utility

Assignee

• SIEMENS VAI METALS TECHNOLOGIES GMBH · AT

Inventors

• Stefan Lechner · Pommersfelden, DE
• Marinko Lekic-Ninic · Linz, AT
• Johann Poeppl · Kirchschlag, AT
• Guoxin Shan · Leoben, AT
• Heinrich Thoene · Linz, AT
• Karl Trnka · Linz, AT
• Franz Wimmer · Ried im Innkreis, AT

Key dates

• Filing date: Mar 2, 2009
• Grant date: Sep 30, 2014
• Expiry date: May 31, 2031

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16C2223/46
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

A roll (1) for supporting and conveying hot material, including a roll element that has a roll jacket (2) made of a basic material and a wear coat which is applied to the basic material by means of a surface welding process (4) 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 (2) is steel and contains up to 0.45 percent of C. The welded-on surface (4) 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 (1), a method for repairing a used roll (1), a welding additive and a welding rod for producing the welded-on surface.