Knotting type heat preservation furnace used for continuously preparing aluminum alloy semi-solid slurry

Abstract

The invention provides a knotting type heat preservation furnace used for continuously preparing aluminum alloy semi-solid slurry. The knotting type heat preservation furnace comprises a furnace body,a hearth and a heater; the hearth and the heater are located in the furnace body, the heater is arranged on the top of the hearth, a slurry making groove is formed in the bottom of the hearth, the heater heats molten aluminum in the hearth through heat radiation, the temperatures of the molten aluminum in the hearth forms a temperature gradient gradually reduced from the molten aluminum liquid level to the molten aluminum deep position, and semi-solid slurry is generated in the slurry making groove. The furnace is used for continuously preparing the semi-solid slurry, oxide inclusions in theslurry are few, and quality inside the casting can be further improved; the slurry making groove in the furnace body is large in use depth, the molten aluminum utilization rate can be up to 80% or above, molten aluminum is added, slagging off is conveniently operated, the effect on the prepared slurry is very little, and the normal production is not affected.

Description

technical field [0001] The invention belongs to the technical field of light alloy semi-solid forming. Background technique [0002] The semi-solid slurry is vigorously stirred during the solidification process of the metal to break the dendrites, and a solid-liquid mixed slurry that uniformly suspends some spherical solid phase particles is obtained. It has good fluidity and can be used in high pressure casting and squeeze casting. When filling, the gas is not easy to get involved, its forming temperature is low, the mold life is long, the deformation resistance is small, and the production efficiency is high; when forming, high pressure is applied to cause plastic deformation of the solidified metal, and the unsolidified metal continues to solidify under high pressure. Less shrinkage cavity shrinkage, dense structure, higher mechanical properties than ordinary castings, close to forgings, heat treatment, no riser feeding, high metal utilization. It is suitable for the pr...

AI Technical Summary

Problems solved by technology

[0003] Although the castings produced by semi-solid forming technology have many advantages, and there are many slurry preparation methods, the continuous preparation, storage and transportation of low-cost and high-quality slurry has always been a problem, which seriously restricts the promotion and application of this technology.

The existing holding furnace for semi-solid slurry preparation, the temperature cannot be controlled at a predetermined gradient, and the use effect is not good, resulting in unstable solid-phase ratio of the semi-solid slurry, which ultimately affects the quality of the casting

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