A slow stretching test device with high temperature and high pressure circulating water and its use method

Abstract

The invention belongs to the field of experimental researches on materials, and particularly discloses a slow stretching experimental device with high-temperature high-pressure circulating water and a using method. The device mainly comprises four parts, namely a high-temperature high-pressure circulating water system, a slow stretching loading device, a hydrochemical control system and a loading monitoring system, wherein the high-temperature high-pressure circulating water system can be used for providing a dynamic high-temperature high-pressure water environment; the slow stretching loading device is used for stretching a test sample in a high-pressure kettle at different strain rates; the hydrochemical control system is used for controlling hydrochemical parameters of the high-temperature high-pressure circulating water system; the loading monitoring system is used for regulating and recording a stretch curve of the test sample in the kettle; the test sample in the high-pressure kettle is fixedly arranged on a fixture; the fixture is connected to the upper end of a loading shaft, and an adapter coupling device is connected to the lower end of the loading shaft; a stretching tester is connected to the lower end of the adapter coupling device, and is used for realizing the slow strain rate loading of the test sample. According to the device and the method, the stress corrosion of a material can be tested in a high-temperature high-pressure circulating water environment, and the problems of complex structure, troublesome maintenance and the like in the prior art are solved.

Description

technical field [0001] The invention belongs to the field of material experiment research, more precisely, relates to a slow strain corrosion cracking experiment device with high temperature and high pressure circulating water and a use method. Background technique [0002] Nuclear power is an efficient and clean energy, and the development of nuclear power is an important way to solve the contradiction between my country's economic development and the unbalanced energy distribution. At present, commercial nuclear power plants mainly use light water reactors. Since the service environment of light water reactor nuclear power plants is high-temperature and high-pressure water (280-343°C, 8-16MPa), its pressure boundaries such as pressure vessels, steam generators, and main pipelines are subject to certain pressures. service stress. Practice has shown that stress corrosion cracking in high-temperature and high-pressure water in nuclear power service is one of the key issues a...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a slow tensile test device with high temperature and high pressure circulating water and its use method, which can test the stress corrosion behavior of materials in the environment of high temperature and high pressure circulating water, and solve the problems of complex structure and troublesome maintenance in the prior art

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