A high temperature and high pressure supercritical carbon dioxide slow strain rate tensile test system

Abstract

The invention discloses a high-temperature, high-pressure supercritical carbon dioxide slow strain rate tensile test system. A slow strain rate stretcher is installed in a reactor, and a pressure balance mechanism is arranged between the slow strain rate stretcher and the reactor. The pressure balance mechanism and the slow strain rate The strain rate stretcher is internally connected to the reactor. The invention can carry out the high temperature and high pressure supercritical carbon dioxide slow strain rate tensile test of candidate materials under different tensile rates, loading stresses, and system carbon dioxide flow rates, pressures, and temperatures, and can precisely control the tensile rate, loading Stress, system carbon dioxide flow, pressure, temperature and other main test parameters, and also have flow abnormal alarm function, stress abnormal alarm, over temperature alarm function, low temperature alarm function, over pressure alarm function, low pressure alarm function, in flow, stress, temperature, In the case of abnormal pressure, the existing data acquisition and processing control system can perform interlock protection on the device to improve the safety of the test device operation.

Description

technical field [0001] The invention relates to material experiment technology, in particular to a high temperature and high pressure supercritical carbon dioxide slow strain rate tensile test system. Background technique [0002] Nuclear energy has become one of the three pillars of world energy due to its advantages of greenness, high efficiency, and economy. The power conversion system using supercritical carbon dioxide as the working medium is receiving more and more attention from the international nuclear energy field due to the advantages of higher thermal efficiency, system simplification, and easier implementation of modular technology due to the adoption of the Brayton cycle. . The research results show that in the high temperature and high pressure supercritical carbon dioxide medium environment, carburization will occur during the corrosion process of structural materials such as stainless steel and nickel-based alloys, resulting in a decrease in the mechanical ...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is that it is difficult to accurately control key parameters such as tensile rate, loading stress and system carbon dioxide flow rate, pressure, temperature, etc. during the high temperature and high pressure supercritical carbon dioxide slow strain rate tensile test, resulting in slow strain rate tensile test The confidence level of the result decreases, and the purpose is to provide a high temperature and high pressure supercritical carbon dioxide slow strain rate tensile test system, which can accurately control the parameters of the high temperature and high pressure supercritical carbon dioxide slow strain rate tensile test to ensure slow strain The accuracy and reliability of the rate tensile test results provide a theoretical basis for the design and life evaluation of supercritical carbon dioxide power conversion system structural materials

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