Method for measuring ingot casting temperature distribution in electroslag remelting process

Abstract

The invention discloses a method for measuring ingot casting temperature distribution in the electroslag remelting process, belongs to the field of special steel smelting, and aims at measuring the ingot casting temperature distribution in the electroslag remelting process simply and effectively and providing targeted guidance for optimization of the electroslag remelting technology. In the electroslag remelting process, a tracer as FeS is added to determine the shape of a metal weld pool in the smelting process, and the ingot casting fusing edge temperature in the state is obtained; a thermocouple and a heat flowmeter mounted in a crystallizer and a bottom water tank are used to obtain the surface temperature and heat flow of cast ingot at the time respectively; and a heat transfer law iscombined with separation of variables to obtain ingot casting temperature distribution at the time. The method is suitable for electroslag remelting smelting technologies.

Description

technical field [0001] The invention belongs to the field of special steel smelting, and in particular relates to a method for measuring the temperature distribution of an ingot during electroslag remelting. Background technique [0002] Electroslag remelting (ESR) is a secondary refining method that uses the resistance heat generated by current passing through slag as a heat source to remelt consumable electrodes. It is a smelting process that combines metal refining and purification with solidification and crystallization. Generally speaking, the equipment is mainly composed of consumable electrodes, slag, crystallizer, bottom water tank and transformer. Since the Joule heat generated by the slag pool melts the consumable electrode during the electrification process, the metal droplets pass through the slag pool under the action of gravity, and undergo physical and chemical reactions with the slag pool, so that the sulfur and inclusions contained in the metal droplets sub...

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Problems solved by technology

[0003] However, the electroslag remelting process is carried out in a nearly sealed environment, and the corresponding theoretical research is not perfect, which makes it difficult to obtain the internal metallurgical process parameters, especially the ingot temperature distribution, during the electroslag remelting process.

Therefore, in actual smelting, it is necessary to determine reasonable process parameters through trial and error, which is costly, time-consuming and not universal.

[0004] With the rapid development of computer capabilities, the use of self-compiled software or commercial software such as Ansys or Procast to predict the temperature distribution of the ingot during the electroslag remelting process has gradually attracted attention, but due to the lack of comprehensive research on the mechanism of the electroslag remelting process , the corresponding models built by the simulation all make certain assumptions, which reduces the accuracy of the predicted results

Moreover, numerical simulation has high requirements on the quality of personnel and the software and hardware required for calculation, making it difficult to popularize in the production line

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