Metso Paper Inc.

Rauma Materials Technology Oy

Metso Powdermet Oy

Erkki Kiiski

Pekka Koivukunnas

Mika Viljanmaa

Jari Liimatainen

Erkki Leinonen

Matti Tervonen

Hannu Martikainen

Arttu Laitinen

Hannu Vuorikari

A roll end ( ) for a roll, in particular for a heatable roll, in a paper or board machine or in a finishing machine is made by a powder metallurgy process in a mold ( ) such that a duct system ( ) for a heat transfer medium is formed in connection with the manufacture of the roll end. A hot isostatic pressing process in particular is used in the manufacture.

Making a powder metal roll end for a heatable roll

The invention relates to the manufacture of paper machine roll shells of stainless steel. According to the invention, powder is made of molten steel by gas-atomizing, a roll shell preform is made of the powder, and the roll shell preform is machined to form a roll shell. The main advantage of the rolls shells according to the invention is their good corrosion fatigue resistance.

Roll manufacture

Growing community of inventors

Tampere, Finland

Erkki Kiiski