Method for manufacturing bottom shrunk type steel ingot mold

Abstract

The invention relates to a method for manufacturing a bottom shrunk type steel ingot mold. The bottom of the steel ingot mold is shrunk, the inner wall at the bottom shrunk position is provided with two section different reducing openings and two section different opening heights, the reducing opening, close to an outer opening, is a small opening, a reducing large opening is located on the side part of the interior of the small opening, the height H of the large opening is larger than the height h of the small opening, so that too fast melting loss of the shrunk part can be prevented; and a smooth transition is formed between the height H of the large opening and the height h of the small opening. According to the method, the bottom structure of the steel ingot mold is locally changed, sothat the process and material waste and the influence on the rear forging procedure are reduced, meanwhile, the situation that cracks and peeling are generated at the bottom of the steel ingot mold is reduced, and the service life of the steel ingot mold is prolonged. The bottom shrunk type steel ingot mold can be widely applied to occasions of producing polygonal steel ingots and plum-shaped steel ingots, the steel ingot mold does not change the overall shape of the steel ingot, the operation is convenient, and the steel ingot mold has an ideal practical effect.

Description

technical field [0001] The invention belongs to the metallurgical casting industry, in particular to a method for manufacturing a bottom-retracting steel ingot mold. Background technique [0002] In iron and steel metallurgical production, steel ingot mold is a commonly used tool for producing steel ingots. Its inner shape is consistent with the shape of the required steel ingot, and polygonal and quincunx shapes are more commonly used shapes. Since the corresponding shape of the ingot tail part usually adopts a relatively regular shape, and the shape and size are smaller than the bottom size of the ingot, after the steel ingot is formed, a polygonal and plum-shaped protruding part is formed at the junction of the bottom and the ingot tail, which often needs to be cut These protruding parts are removed to reduce the impact on the subsequent forging process, resulting in waste of processes and materials. At the same time, the polygonal and quincunx-shaped protruding parts fo...

AI Technical Summary

Problems solved by technology

Since the corresponding shape of the ingot tail part usually adopts a relatively regular shape, and the shape and size are smaller than the bottom size of the ingot, after the steel ingot is formed, a polygonal and plum-shaped protruding part is formed at the junction of the bottom and the ingot tail, which often needs to be cut Remove these protruding parts to reduce the impact on the subsequent forging process, resulting in waste of processes and materials

At the same time, the polygonal and quincunx-shaped protruding parts formed at the junction of the bottom of the ingot and the tail of the ingot also form a stress source for the ingot mold, which is prone to cracks and peeling

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