Method of making a roll with a composite roll ring of cemented c

Details Method of making a roll with a composite roll ring of cemented c Method of making a roll with a composite roll ring of cemented c

1991-12-27

1992-12-01

Echols, P. W.

Metal working

Method of mechanical manufacture

Roller making

298952, 29132, B22F 300

Patent

active

051670674

ABSTRACT:
The present invention discloses a roll for hot and/or cold rolling. The rolling track comprises one or several cemented carbide rings, which are cast into a casing made by an iron alloy. The cast alloy comprises a materially graphitic cast iron, which after the casting contains residual austenite. This residual austenite is at subsequent heat treatment or treatments partly or totally transformed under volume increase to mainly bainite with the aim of reducing or totally eliminating the differential shrinkage between the cast iron and the cemented carbide as a result from cooling after the casting.

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patent: 3997370 (1976-12-01), Horvath, Jr. et al.
patent: 4099311 (1978-07-01), Kark
patent: 4119459 (1978-10-01), Ekemar et al.
patent: 5044056 (1991-09-01), Sundstedt et al.
J. F. Janowak et al., "Approaching Austempered Ductile Iron Properties by Controlled Cooling in the Foundry", J. Heat Treating, American Society for Metals, vol. 4, No. 1, Jun. 1985, pp. 25-31.
Abstract for Swedish Patent Application 86-03987-2, filed Mar. 24, 1988.

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