CENTRIFUGAL CASTING METHOD OF BIMETALLIC FORMING ROLLS Russian patent published in 2020 - IPC B22D13/02 

FIELD: technological processes.

SUBSTANCE: invention relates to foundry and can be used in centrifugal casting of large bimetallic rolls. Working layer of the roll is molded into mold (1) with a horizontal axis of rotation. Mold with pre-cast working layer (2) of the rolling roll is installed vertically in the caisson on mold (9) with the molding mixture forming lower neck (10) of the rolling roll. Form (5) with molding mixture is arranged on said mold to form upper neck (6) of rolling roll, while profiled extension (7) is fitted on said form. All forms are clamped by clamps (13). Metal refrigerator (12) in the form of a ring at distance of 47–53 mm from lower edge (11) of the mold is installed in the molding mixture of lower form coaxially to the formed neck. Wall thickness of refrigerator is 1.8–2.0 mm, diameter is 360–400 mm, height is 195–205 mm. Liquid metal is poured into the obtained mold to form a barrel and necks of the rolling roll.

EFFECT: elimination of cracks at the junction of the journal and roll barrels due to equalization of metal hardening speeds of the lower journal of the roll in the molding mixture, and metal of the core of the roll, which is in metal form – chill mold.

1 cl, 2 tbl, 4 ex, 1 dwg