Yankee cylinder with a plasma-sprayed carbide coating
AssigneeTampella Telatek Oy
InventorsJaakko Tenkula, Bjarne Hellman, Jorma Majava
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Abstract
The invention relates to a Yankee cylinder for a paper-making machine, in which a coating which is a mixture of a metal powder and a carbide or nitride and withstands well the wearing effect of the doctor blade and other corrosive and thermal stresses produced in paper-making is formed on top of the cylinder mantle. The invention also relates to methods for coating a Yankee cylinder with such a coating by using a detonation, plasma or supersonic method.
Claims4
A Yankee cylinder for a paper-making machine, having ends and axle pins, as well as a cylinder mantle which is made of metal and primarily gives the cylinder its mechanical strength, characterized in that on top of the cylinder mantle a plasma or supersonic sprayed coating is formed which constitutes the surface layer, the coating being an alloy of a metal powder and a carbide or nitride and resisting well the wearing effect of a doctor blade and other corrosive and thermal stresses produced in paper making.
Dependencies are inferred from the claim text.