Ingot-casting area water cooling technique during aluminum alloy semi-continuous casting

Abstract

The invention relates to a water cooling process in a casting ingot area during aluminium alloy semi-continuous casting. The water cooling process comprises the steps that an area cooling device is arranged below a crystallizer so as to drive a main clamping plate to retract through the retraction of a cylinder; an auxiliary clamping plate also retracts under the drive of a connecting rod, and further a wiper plate automatically clamps or loosens a casting ingot; at the beginning of casting, the cooling water flow is set according to the casting process; at the same time, air is supplied to a cylinder of the area cooling device, the action of the cylinder drives the wiper plate to loosen, and then the casting ingot moves down along with a dummy bar head, cooling water is sprayed onto thesurface of the casting ingot and then flows down along the surface of the casting ingot; when the length of the casting ingot is between 0 and 1,000 millimetres, air supply into the cylinder is stopped, then the cylinder resets to drive the wiper plate to clamp the casting ingot, the cooling water is sprayed onto the surface of the casting ingot and then flows down along the surface of the ingot;and the cooling water is stopped by the wiper plate when flowing to the area cooling device and can not flow down along the surface of the casting ingot so as to realize area cooling. The area water cooling ensures natural air cooling of the casting ingot below the wiper plate during the casting, reduces the internal casting stress effectively and inhibits the cracking of ingot.

Description

technical field [0001] The invention relates to an ingot regional water cooling process in the aluminum alloy semi-continuous casting process, and belongs to the technical field of aluminum alloy semi-continuous casting. Background technique [0002] Vertical direct water-cooled semi-continuous casting (DC casting) is the main means of producing round ingots for extrusion and plate ingots for rolling in the aluminum processing industry. figure 1 It is a schematic diagram of semi-continuous casting of aluminum alloy, including mold 4 and dummy head 5, aluminum liquid 1 is poured into the space surrounded by mold 4 and dummy head 5, when aluminum liquid 1 is connected with mold 4 and dummy head 5 The ingot head 5 comes into contact to form a solid-liquid mixing zone 2, and the aluminum melt is cooled by the crystallizer and the dummy head and solidified along its boundary. After the aluminum melt reaches a certain height in the crystallizer and the solidification shell has en...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the phenomenon of cracking of hard / ultra-hard aluminum alloys in the casting process, the present invention provides a water-cooling process in the casting area of ​​aluminum alloys in the semi-continuous casting process, which can better solve the poor casting of hard / ultra-hard aluminum alloys problems, effectively inhibit the ingot from cracking during the casting process

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