Continuous temperature measuring device and method during directional solidification
A technology of directional solidification and temperature measuring devices, which is applied to measuring devices, electrical devices, thermometers, etc., can solve the problems of continuous temperature measurement and temperature gradient difficult to calculate accurately, and achieve the effect of accurate, continuous and accurate calculation of temperature values
Inactive Publication Date: 2012-10-31
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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[0003] The purpose of the present invention is to provide a continuous temperature measurement device and method in the directional solidification process to solve the engineering problems such as the difficulty in continuous temperature measurement and the difficulty in accurately calculating the temperature gradient in the directional solidification furnace
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[0034] Taking the regional melting liquid metal cooling furnace as an example, the alloy used is SRR99 nickel-based superalloy, and introduces the method of continuous temperature measurement and the calculation of temperature gradient.
[0035] Such as figure 1 As shown, the continuous temperature measuring device for the directional solidification process of the regional melting liquid metal cooling furnace of the present invention mainly includes: an upper lifting system 1, a paperless recorder 2, a mold shell clamping rod 3, a mold shell 4, a solid phase alloy 5, a single hole Ceramic tube 6, double-hole ceramic tube 7, platinum-rhodium thermocouple 8, induction copper ring 9, graphite ring 10, alloy melting zone 11, heat insulation baffle 12, solid-liquid interface 13, crucible 14, liquid metal 15, lower lift System 16 etc., concrete structure is as follows:
[0036] The double-hole ceramic tube 7 is installed on the lower part of the upper lifting system 1, and the plat...
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The invention belongs to the field of temperature measurement, and particularly to a continuous temperature measuring device and method during the directional solidification, and solves the problems that the temperature continuous measurement during the directional solidification is difficult, and the like. According to the invention, a non-contact thermocouple is adopted, during the directional solidification, temperature values at different positions are continuously measured, and the temperature gradient at the solid liquid interphase is accurately calculated; a single-orifice ceramic tube with a sealed bottom end and the same height as a molded case is placed in the molded case in advance; the single-orifice ceramic tube is fixed and immovable in the molded case and is parallel to the direction of the temperature gradient, and separates a platinum-rhodium thermocouple from an alloy melt, and the two poles of the thermocouple are placed in a double-orifice ceramic tube; and the double-orifice ceramic tube is inserted at the bottom of the single-orifice ceramic tube, the top end of the double-orifice ceramic tube is fixed at an upward lifting system, and the top ends of the two poles of the thermocouple are externally connected with a paperless recording instrument automatically collecting the temperature values at different times. The temperature change along with the time variation in the paperless recording instrument is converted into the temperature change along with the distance variation, so that the temperature field distribution in different positions during the directional solidification can be reflected.
Description
Technical field: [0001] The invention belongs to the field of temperature measurement, in particular to a continuous temperature measurement device and method for directional solidification process. Background technique: [0002] Directional solidification technology is widely used in the manufacture of turbine blades for aero-engines and gas turbines. In the research process of directional solidification theory and technology, it is often necessary to determine the distribution of the temperature field during the solidification process, so it is necessary to measure the temperature field during the directional solidification of the alloy. However, the directional solidification process is carried out under vacuum and airtight conditions, and the furnace temperature during the solidification process is as high as 1700 ° C. Therefore, it is difficult to collect and process the furnace temperature data of the directional solidification furnace, and the accuracy of the collecte...
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IPC IPC(8): G01K7/06G01K1/02G01K1/022
Inventor 张小丽周亦胄金涛孙晓峰
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI