A multi-stage variable-diameter infrared temperature measuring device and temperature measuring method for induction melting

Abstract

The invention discloses an infrared temperature measuring device and a temperature measuring method for vacuum induction smelting, comprising an infrared temperature measuring probe, a window, a multi-stage temperature measuring tube and a fixing device; Infrared light, the window is used to keep the vacuum seal and allow the infrared light to pass through, the multi-stage temperature measuring tube allows the infrared light to pass through, focus and form a spot irradiated on the temperature target to be measured, and the temperature measurement process The generated smoke and / or steam is deposited and / or discharged; the multi-stage temperature measuring tube includes a multi-stage structure, and at least one stage of the multi-stage structure includes a wide-diameter portion at one end and a small hole at the other end; The fixing device is used to fix the infrared temperature measuring device, so that the light spot formed by the infrared light for temperature measurement is irradiated on the target to be measured. The present invention is different from the traditional hand-held infrared temperature measuring device, and adopts a fixed and multi-level structural connection method, so that dust and steam are deposited on the inner wall of the temperature measuring tube during the rising process, preventing them from adhering to the glass window of the temperature measuring port , which can realize real-time, continuous and accurate temperature measurement.

Description

technical field [0001] The invention belongs to the technical field of casting equipment, and in particular relates to a multi-stage variable-diameter infrared temperature measuring device and a temperature measuring method for induction melting. Background technique [0002] Vacuum induction melting technology has been widely used in the production of special alloy materials such as nickel-based superalloys, titanium alloys, stainless steel, and ultra-high-strength steel due to its high efficiency, low energy consumption, and strong electromagnetic stirring effect that is beneficial to eliminate component segregation. . In the vacuum induction melting process, the alloy liquid is usually refined under the conditions of high temperature, high vacuum and high stirring, and the appropriate pouring temperature must be controlled. Therefore, realizing accurate measurement of alloy melt temperature plays a key role in achieving high purity and high accuracy of final alloy compon...

AI Technical Summary

Problems solved by technology

However, the traditional hand-held infrared thermometer is not suitable for vacuum induction melting. The main problems are: first, the temperature measurement point of the hand-held infrared thermometer is artificially controlled, and the temperature measurement point is unstable, resulting in errors secondly, continuous measurement cannot be realized due to the need for hand-held infrared thermometers; finally, infrared temperature measurement is easily affected by the surrounding environment, while vacuum induction melting melts alloys under high temperature and high vacuum conditions, and the alloy melt Gasification, volatilization, and flue gas produced by the working medium at high temperature will cause a large amount of dust and flue gas near the melting crucible. These substances are usually easy to attach to the glass window of the infrared thermometer temperature measurement port, thus affecting the temperature measurement. The accuracy of the temperature has a great influence on the

At present, some infrared thermometers eliminate the influence of flue gas by purging, but this method is also not suitable for vacuum induction melting. Firstly, the effect of purging is not stable, and secondly, the gas purged will inevitably affect the alloy to be measured. The surface temperature of the melt is affected, resulting in a drop in temperature and inaccurate temperature measurement

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