Method for molding large ring piece by casting blank ring rolling

Abstract

The invention relates to a method for molding a large ring piece by casting blank ring rolling, belonging to a method for processing and molding a large metal ring piece. The invention mainly solves the technical difficulty of more material waste and serious energy waste of the existing ring rolling method. The method has the technical scheme that the method for molding the large ring piece by casting blank ring rolling comprises the steps of alloy melting, refining, casting ring blank, casting blank ring rolling, rough processing, heat treatment and finishing; the refining means that an LF furnace is used for external refining, molten steel content and temperature are rapidly homogenized by argon blowing stirring, so that molten steel with high purity can be obtained; the casting ring blank means that when the temperature of the refined molten steel is reduced to 1580-1600 DEG C, self-hardening sand molding pouring is adopted to obtain a ring-shaped casting blank; and the casting blank ring rolling means that the ring-shaped casting blank is heated to 1100-1200 DEG C and is treated by ring rolling on a ring rolling machine, the feeding amount is controlled, and the ring rolling ratio is 2-3.

Description

technical field

[0001] The invention relates to a method for rolling and forming a large-scale ring by casting slab, which belongs to a method for processing and forming a large-scale metal ring. Background technique

[0002] At present, there are two commonly used methods for producing high-quality bearing rings and flanges, which are cold rolling and hot rolling. The cold rolling method is to use the forging billet to carry out rolling at room temperature. Although the quality of this method is easy to guarantee, it requires a large rolling force and is only suitable for the processing of small rings. The hot rolling method usually adopts the steps of forging billet-punching-heating-rolling-machining-heat treatment, etc. This method is often used in the production of large rings. For the production of large rings, descaling and punching are required due to the hot rolling of forgings, and the machining allowance is large, resulting in waste of labor and materials. Rings ...