A Method for Obtaining Axial Uniform Temperature Section of Standard Specimen

Abstract

The invention relates to a method for acquiring an axial uniform temperature section of a standard test piece. The method comprises the following steps: (1) preparing three independent induction heating coils, wherein two induction heating coils are vortex-shaped induction heating coils with relative small inner diameters, and one induction heating coil is a single-turn induction heating coil with a relatively large diameter; (2) placing the two small-diameter coils with the same diameter at the upper end and the lower end of a test piece, arranging the large-diameter coil in the middle part of the test piece, wherein the flow direction of current is opposite to the two small-diameter coils, and the three coils are ensured to be concentric when in installation. By adopting the method, a high-temperature mechanical test piece can be uniformly heated, a maximum temperature difference in a whole check section is within + / -5 DEG C, and the test requirement of a high-temperature mechanical test for the temperature uniformity of the check section can be met. Moreover, by adopting the scheme, an axial distance between the coils can be conveniently adjusted.

Description

technical field [0001] The invention relates to a method for obtaining an axial uniform temperature section of a standard test piece, and belongs to the technical field of high-temperature mechanical performance testing of materials and the like. Background technique [0002] In the high-temperature mechanical performance test of materials, the temperature uniformity of the assessment section will have a great impact on the accuracy of the test results. Research institutions have formulated strict standards, such as ASME E606, ISO 12111, GB / T 26077-2010, etc. High-frequency electromagnetic induction heating is a commonly used heating method in the field of material performance testing. In the method, an induction coil is manufactured and connected to a high-frequency induction furnace to realize heating of the central object of the induction coil. Commonly used induction coils are helical coils with several turns of equal diameter. This kind of coil adopts more coil turns...

AI Technical Summary

Problems solved by technology

[0003] The technical solution of the present invention is to overcome the disadvantage of poor temperature uniformity of the traditional induction heating method in the high temperature mechanical test, and provide a method for obtaining the axial uniform temperature section of the standard test piece, so as to realize uniform heating in the examination section of the high temperature mechanical test piece and ensure the high temperature mechanical test. Uniform temperature test conditions of the test

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