Experimental device for determining the heat transfer coefficient of water-cooled casting molds

Abstract

The invention discloses an experiment device for detecting a heat exchange coefficient of a water cooling mould. The experiment device comprises a mould, a cast ingot, a cooling system, a temperature collecting system, a heating device and a heat exchange coefficient calculation module. The experiment device provided by the invention is characterized in that an input end of the temperature collecting system is connected with the cooling system, the mould and the cast ingot respectively, and an output end of the temperature collecting system is connected with the heat exchange coefficient calculation module; the cast ingot and the mould are in contact; and the cast ingot and the heating device are in mutual contact; meanwhile, a flow meter is arranged in the cooling system and is used for controlling cooling strength in the device, and the temperatures of the cooling system, the mould and the cast ingot at the different positions can be collected in real time by using the temperature collecting system; and heat exchange coefficients of the different positions under different flow velocities can be calculated according to the fact that the heat entering the mould in a stable-state heat transmission process is equal to the heat brought away by cooling water. The experiment device has the advantages of simple structure, convenience in operation and high accuracy.

Description

technical field [0001] The invention belongs to the technical field of measuring device design, in particular to an experimental device for measuring the heat transfer coefficient of a water-cooled casting mold. Background technique [0002] At present, the production of billets by continuous casting has become the mainstream process in the iron and steel industry, but in the production fields of special steel, special-shaped billets, and super-large wide and thick slabs, the production of casting molds still plays a dominant role. The cooling of the traditional casting mold is natural cooling by air convection, the cooling time is long, and the casting mold is exposed to high temperature for a long time, which leads to high requirements for heat resistance and large volume of the material of the traditional casting mold. Due to the high temperature for a long time, the service life of the mold is short and the cost is high. The new water-cooled casting mold adopts forced w...

AI Technical Summary

Problems solved by technology

However, if the cooling rate of the water-cooled mold is too fast, it is easy to cause the ingot to solidify too quickly, resulting in stress concentration, resulting in casting defects such as cracks and deformation of the ingot, so the effective control of the heat transfer process between the ingot and the mold is the water-cooled mold The core technology of production

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