Eddy current heating high temperature mechanical testing device

Abstract

The invention relates to an eddy current heating high temperature mechanical testing device, which belongs to the technical field of mechanical testing and relates to a mechanical testing device for rapidly heating a sample by using an eddy current technique to obtain a high temperature testing environment. The device adopts eddy current rapid heating to meet the requirements of high-rate temperature rise and wide temperature zone heating of the sample in a high temperature mechanical test. An airtight box structure is adopted, and a vacuum pump is used for vacuum pumping to meet vacuum environment requirements. Upper and lower chucks adopt the overall structure, which is good for neutrality and have small measurement errors. The device consists of a clamping unit, a loading unit, a heating and cooling unit, an airtight box, and a reference frame. The device has the characteristics of rapid sample temperature rise, large applicable temperature zone, high heating efficiency, compact structure and simple operation. The device has good neutrality, reduces measurement errors, and has high testing accuracy. An aerospace high temperature thermal shock environment can be accurately simulated, and the mechanical experiments of high temperature materials are completed.

Description

technical field [0001] The invention belongs to the technical field of mechanical testing, and relates to a mechanical testing device which uses eddy current technology to rapidly heat a sample separately to obtain a high-temperature testing environment. Background technique [0002] High-temperature resistant structural materials play an important role in the aerospace field, and structural materials with mechanical stability in high-temperature environments are crucial to improving the performance of aerospace vehicles. The testing and characterization of mechanical properties of material samples in high temperature environment is a key link in the development of high temperature resistant aerospace structural materials. The characterization of high-temperature mechanical properties of structural materials depends on the research and development of high-performance high-temperature mechanical test equipment. [0003] At present, the mechanical test of high-temperature str...

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned high-temperature mechanical testing devices all use high-temperature furnace heating and indirect heat transfer to the sample to obtain high-temperature experimental conditions. This technical approach has the following defects: 1) Slow heating speed: through indirect heat transfer such as conduction, convection, and radiation, the test The maximum heating rate of the sample is limited (usually ≤30°C / min), which can only provide a slowly changing heating process, and it is difficult to simulate the thermal-mechanical shock conditions of the high-temperature structure in the service environment of aerospace vehicles; 2) The upper limit of the sample temperature is low: The indirect heat transfer method is adopted, and the temperature of the heating furnace is required to be ≥ the temperature of the sample. The upper limit test temperature of the sample is limited by the material and structure of the furnace body, and the applicable temperature range of the test device is narrow.

3) Low heating efficiency: the heating process requires long-term heat transfer and heat preservation, large heat dissipation, and low energy efficiency

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