Sensor for metal liquid comprehensive performance on-line detection

Abstract

The invention relates to a sensor for on-line detection of comprehensive performance of molten metal. The sensor comprises a cup body (1) and a thermocouple (3, 2, 2'), and the thermocouple traverses the cup body and is used to generate temperature changes with the molten metal. For related electrical signals, the present invention is characterized in that: the thermocouple is surrounded by a high temperature resistant protective sleeve, and its position in the cup body is between 1 / 2 and 2 / 3 of the height of the cup body; And the bottom surface includes a paint layer (4), the paint layer contains tellurium Te, bismuth Bi and aluminum Al. The sensor of the invention has the advantages of wide measurement range, high precision and good stability.

Description

Technical field [0001] The invention relates to a sensor for on-line detection of the comprehensive performance of molten metal. The sensor is used for converting the cooling characteristic of molten metal into an electric signal when detecting the comprehensive performance of molten metal in front of a furnace. Background technique [0002] The foundry industry is the foundation of the machinery manufacturing industry. In order to improve the quality of castings, the detection of the comprehensive performance of castings is a key issue. The test of comprehensive performance should include not only the test of chemical components such as carbon content and silicon content, but also the test of physical parameters such as strength, hardness, elongation, spheroidization rate and carbide. The traditional casting inspection is to analyze (section) the sample or casting after the casting is completed. This inspection is called offline inspection. With the development of thermal ...

AI Technical Summary

Problems solved by technology

[0004] The existing sensors for on-line detection of comprehensive properties of molten metal have the following disadvantages: (1) poor strength, easy to be damaged by collision or thermal expansion; (2) large amount of gas generation, after the high-temperature molten metal is poured into the sensor, a large amount of overflow in the sensor cup The gas causes disturbance and splashing of the molten metal, making the test unstable; (3) strong hygroscopicity, after the molten metal is poured into the sensor, a large amount of water vapor also causes disturbance and splashing of the molten metal, making it difficult to perform the test; (4) "thermal analysis platform (5) The "thermal analysis platform ability" is unstable, or the thermal inertia is large , resulting in poor reproducibility, great disparity in parameters measured by the same molten iron, and poor test reliability; (6) poor test sensitivity of solidus temperature Ts; (7) narrow test range, few functions, few parameters, and poor accuracy

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