Roll ring comprising a ring of cemented carbide metallurgically

Details Roll ring comprising a ring of cemented carbide metallurgically Roll ring comprising a ring of cemented carbide metallurgically

1989-12-13

1991-09-03

Echols, P. W.

Metal working

Means to assemble or disassemble

Puller or pusher means, contained force multiplying operator

B21B 3108

Patent

active

050440560

ABSTRACT:
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 comprises a materially graphitic cast iron, which, after 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, which develops as a result of cooling after casting.

REFERENCES:
patent: 3609849 (1971-10-01), Krol
patent: 3787943 (1974-01-01), Loqvist
patent: 3807012 (1974-04-01), Loqvist
patent: 3860457 (1975-01-01), Vourinen et al.
patent: 3997370 (1976-12-01), Horvath, Jr. et al.
patent: 4099311 (1978-07-01), Kark
patent: 4119459 (1978-10-01), Ekemar et al.

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