A frequency conversion induction heating and cooling device

Abstract

The invention discloses a frequency conversion induction heating and cooling device. The frequency conversion induction heating and cooling device comprises a furnace body, a switchable variable-frequency power supply, a furnace door, air valves, a thermocouple, coils, a heat preservation box body, graphite electrodes, an Al2O3 crucible and a water-cooling chuck; the furnace body can provide a high vacuum or inert gas to protect environment; the switchable variable-frequency power supply is connected with the coils and can provide a working / medium / high-frequency power supply and a pulse powersupply; the high-frequency power supply enables graphite electrodes to emit heat, so that a metal sample is heated to be molten, and then the working / medium power supply or the pulse power supply canbe switched to perform electromagnetic treatment in the solidification process of the sample. In addition, at any time when the sample is solidified, the air valves can be opened, low-temperature inert gas is quickly filled into the bottom of the furnace body, the sample is quenched, and metal samples with different growth forms under different cooling speeds, different magnetic fields and different times are obtained. According to the frequency conversion induction heating and cooling device, metals can be rapidly melt and are used for researching the solidification process of continuous casting billets and ingots.

Description

technical field [0001] The invention relates to the technical field of metal solidification such as casting and continuous casting, in particular to a frequency conversion induction heating and cooling device. Background technique [0002] Continuous casting is the mainstream production technology in today's metallurgical industry. my country's continuous casting production began to develop rapidly in the 1980s. In 2018, the national continuous casting billet output exceeded 1 billion tons, and the continuous casting ratio exceeded 99%. The research on the solidification process of continuous casting slab is a worldwide problem. The continuous casting slab not only has the common characteristics of the metal solidification process such as high temperature and opacity, but also because of large-scale industrial production, the current relatively mature experimental research methods such as pouring method, thermal analysis method, visual observation method and physical simula...

AI Technical Summary

Problems solved by technology

However, there are two defects in the steel melting method of the above two thermal simulation devices. One is that resistance heating is used. Second, the above two devices did not introduce the disturbance of the magnetic field to the molten metal, so the influence of the magnetic field on the solidification process of the metal could not be studied

However, previous studies have shown that the disturbance of the magnetic field has a significant impact on the production morphology and composition distribution of the grains.

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