Method for manufacture of a roll ring comprising cemented carbid

Details Method for manufacture of a roll ring comprising cemented carbid Method for manufacture of a roll ring comprising cemented carbid

1991-02-21

1992-04-14

Dean, R.

Metal treatment

Compositions

Heat treating

148141, 148321, 148324, 29132, 75243, 428564, B22F 300

Patent

active

051044587

ABSTRACT:
The present invention discloses a roll ring 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 comprising 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.

REFERENCES:
patent: 3807012 (1974-04-01), Loquist
patent: 4119459 (1978-10-01), Ekemar et al.
J. F. Janowak and R. B. Gundlach, "Approaching Austempered Ductile Iron Properties by Controlled Cooling in the Foundry", Journal of Heat Treating, American Society for Metals, vol. 4, No. 1, Jun. 1985, pp. 25-31.

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