Method for solidifying microlite by impulse current liquid surface disturbance

Abstract

A process for fine crystallization of metal liquid by electric current pulses is carried out by: smelting metal and over-heating, casting, inserting two parallel electrodes from above into molten metal, and disturbing metal liquid by 1000-4000A impulse electric current at 100-1000Hz to obtain fine-crystallized cast ingots. The disturbance is divided into both periods of core forming and solidifying. It can be used mold casting or continuous casting various metals.

Description

technical field [0001] The invention relates to a pulse current liquid level disturbance solidification fine-grain method, which belongs to the technical field of metal solidification. Background technique [0002] Solidification and fine-grain technology has always been a research topic for metallurgical materials scholars, so a large number of solidification and fine-grain technologies have emerged with the deepening of research. At present, the metal solidification and fine-grain methods can be roughly classified into the following categories: (1) pouring process and heat transfer condition control methods; (2) chemical treatment methods; (3) kinetic refinement methods. [0003] The control methods of pouring process and heat transfer conditions mainly include pouring process control technology, low temperature pouring, increasing cooling speed and increasing supercooling degree, etc. These methods are traditional refinement methods. For example, in the continuous castin...

AI Technical Summary

Problems solved by technology

However, relying on the method of adding a grain refiner to the melt is not only costly and complicated in the preparation process, but also sometimes due to the addition of foreign particles, the number of heterogeneous particles and inclusions in the metal increases, resulting in a decrease in plasticity and mechanical properties.

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