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.
Type:
Grant
Filed:
October 9, 1991
Date of Patent:
June 23, 1992
Assignee:
Tampella Telatek Oy
Inventors:
Jaakko Tenkula, Bjarne Hellman, Jorma Majava
Abstract: A filler wire of a new type for use in arc-spraying, by means of which coatings highly resistant to mechanical and/or chemical wear can be produced. The wire comprises a soft sheath made from unalloyed or alloyed metal, inside which there is a very fine-grained filler material which contains, in addition to iron, other metals and/or special carbides and/or oxides, the powder being prepared by atomizing a melt of the said constituents.
Type:
Grant
Filed:
May 28, 1987
Date of Patent:
March 7, 1989
Assignee:
Telatek Oy
Inventors:
Jaakko Tenkula, Bjarne Hellman, Juha Huusko
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