Magnesium alloy round billet continuous casting crystallizer

Abstract

Disclosed is a magnesium alloy round billet continuous casting crystallizer. Water flowing grooves are distributed in the contact surface of a water tank water diversion body or a cooler along the periphery, and the water flowing grooves in the upper, middle and lower portions are connected with water inlet / outlet channels in respective areas respectively and enable the upper, middle and lower portions to supply different cooling media and flowing amounts according to needs, so that segmentation cooling control over the crystallizer is achieved. Medium inlet / outlet ports of the upper, middle and lower portions are communicated with corresponding water inlet / outlet flanges respectively, and the length of the crystallizer can be increased to 800 mm to the maximum extent. A cooling area of the inner wall of the crystallizer adopts independent cooling control with an upper section, a middle section and a lower section from top to bottom, and control flexibility of the crystallization and solidification intensity of molten magnesium alloy is improved. Inert gas is introduced to the lower portion of the crystallizer for protection, so that water steam is prevented from entering the inner wall of the crystallizer and causing combustion or explosion accidents of the molten magnesium alloy. The magnesium alloy round billet continuous casting crystallizer is an important breakthrough in improving the casting speed of the magnesium alloy, and fills the blank in the field of comprehensive design schemes of the magnesium alloy continuous casting crystallizer.

Description

technical field [0001] The invention relates to the technical field of magnesium alloy round billet continuous casting machines, in particular to a magnesium alloy round billet continuous casting crystallizer. Background technique [0002] The mold is the heart of continuous casting production. In the mold area, the heat of the magnesium alloy melt is transferred to the mold, and the temperature of the magnesium alloy melt at the contact point with the inner wall of the mold drops below the solidification temperature due to the rapid heat transfer. , to promote the rapid solidification of this part of the melt to form the initial billet shell. With the continuous downward movement of the magnesium alloy melt and the solidified shell relative to the inner wall of the crystallizer, the thickness of the solidified shell gradually increases and has sufficient strength to resist the static pressure of the internal melt. resulting deformation. The height of the semi-continuous ca...

AI Technical Summary

Problems solved by technology

The height of the semi-continuous casting mold of conventional magnesium alloy is small, generally between 150-250mm, the contact distance between the magnesium alloy melt and the inner wall of the mold is small, and the heat taken away per unit time is also small, which requires the casting speed to be very low

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