Device capable of continuously measuring temperature of metal melt in pulse magnetic oscillation processing technology

Abstract

The invention discloses a device capable of continuously measuring the temperature of metal melt in a pulse magnetic oscillation processing technology. The device comprises a temperature measurement and analysis system, a casting device and a pulse magnetic oscillation processing device. The casting device comprises a cast molding device, a medium-frequency induction power supply and an induction coil. The metal melt is contained in an inner cavity of the cast molding device. A head cover is arranged at an upper opening of the cast molding device and forms a thermocouple fixing device. The induction coil is controlled by the medium-frequency induction power supply through a switch device to generate a pulsed magnet field, makes solid metal contained in the cast molding device induce eddy currents, and enables the solid metal to emit heat and melt. The pulse magnetic oscillation processing device comprises a pulsed power supply and an electromagnetic coil, wherein the electromagnetic coil is controlled by the pulsed power supply to exert a pulse magnetic oscillation effect on the metal melt, and temperature information of the metal melt is recorded continuously through a temperature collecting and recording system. By means of the device, a temperature curve inside the metal melt subjected to pulse magnetic oscillation processing can be obtained through accurate measurement, the measurement device is easy and convenient to use, and measured data are accurate and reliable.

Description

technical field [0001] The invention relates to a temperature measurement and analysis device, in particular to a continuous temperature measurement device for metal melt, which is applied in the technical field of metal material melting and casting technology. Background technique [0002] Since controlling the solidification structure of metal materials is an important means to improve material properties, this field has become a focus of attention of material scientists at home and abroad, especially refining the solidification structure of metals is conducive to improving the overall performance of metals, and refining The methods of solidification structure mainly include inoculation, modification treatment, microalloying and external field treatment. Among them, the effect of external field treatment on metal solidification structure and solid-state phase transition is very significant, and research in this area has made great progress. [0003] Among the existing tec...

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Problems solved by technology

In order to further explore the essential mechanism of this method, it is of great significance to accurately measure the melt temperature curve under the action of this method. However, in the specific implementation process of the device in this patent, it is necessary to first melt the metal block through a resistance furnace and keep it warm for a period of time. Then the molten metal is poured into the mold, and there are many human factors in the process of taking the molten metal out of the resistance furnace to pouring. On the one hand, it is difficult to ensure that the time of the process in each experiment is the same as the external environment, and this On the one hand, due to a large amount of heat dissipation in the process, the temperature of the molten metal has dropped when it is poured into the mold; difficult to keep consistent

Due to the rapid cooling rate of the molten metal in the high temperature section, these two unfavorable factors lead to a large difference in the actual pouring temperature in different experiments, and the cooling process experienced by the molten metal will also be different, which will eventually affect the actual solidification structure

In addition, there are two main traditional temperature measurement methods: one is to drill a hole from the side wall and insert the thermocouple horizontally into the mold in advance. The disadvantage of this method is that the melt flows violently when it is just poured into the mold. The temperature fluctuates greatly and the temperature drops quickly, so the temperature measured by the thermocouple has a large error

The second is to insert the thermocouple into the melt after the pouring is completed, and when the molten metal is poured into the mold with a lower temperature, a solidified shell will be formed rapidly on the mold wall, and the inserted thermocouple will also affect the temperature of the mold. The melt in the area produces a certain chilling effect. These two factors lead to a large error in the measured temperature, and cannot reflect the influence of the nucleation and growth of the melt at the mold wall on the melt temperature. The mechanism of pulse magnetic oscillation to refine the solidified metal structure is particularly critical

In summary, on the one hand, the error of the temperature curve measured by the traditional method is large, and on the other hand, it is difficult to obtain some key information

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