Roll or roller – Single annular member – per se – Specific metallic composition
Patent
1993-05-13
1994-08-02
Eley, Timothy V.
Roll or roller
Single annular member, per se
Specific metallic composition
492 54, B21B 3108
Patent
active
053341252
ABSTRACT:
The invention is related to a process for the manufacture of a roll, in particular of a calender roll for a paper machine. In the process, the mantle of the roll is cast or cast and heat-treated and, in the next step, the roll mantle is machined. In the process, the surface layer of the cast-iron roll mantle is hardened and tempered so that, in the surface layer of the roll mantle, a temper-martensitic structure is produced. The roll mantle is then subjected to finishing machining in a manner known in the art. The invention is also related to a roll, in particular a calender roll for a paper machine, which roll is provided with a cast-iron mantle. The surface layer of the roll mantle is hardened and tempered so that the surface layer of the roll mantle is temper-martensitic.
REFERENCES:
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Paperin Valmistus (Paper Making), part 2, Turku, 1983, p. 734.
Soviet Inventions Illustrated, Section Ch, Week 8408, Apr. 4, 1984, Derwent Publications Ltd., London, GB; Class M, p. 24, AN 84-047526/08 & SU-A-1011 709 (Heavy Transport MAC), Apr. 15, 1982.
Metal Science and Heat Treatment, vol. 25, No. 3/4, 1983, New York, pp. 281-283; A. F. Malyi et al.: "Effect of tin on the structure and properties of high-strength cast iron after induction hardening".
Eley Timothy V.
Valmet Paper Machinery Inc.
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