Thin-walled tube arc-shaped sample high-temperature high-pressure water slow tensile test clamp and application method thereof

Abstract

The invention relates to the field of stress corrosion tests of metal and alloy thereof, in particular to a slow tensile test clamp of a thin-walled tube arc-shaped sample in a high-temperature high-pressure water environment and an application method of the slow tensile test clamp. The slow tensile test clamp is suitable for stress corrosion crack sensitivity study of a thin-walled tube in high-temperature high-pressure water. The clamp is composed of a sample clamping part and a clamp adaption part, the sample clamping part comprises a female die, a male die, a locating pin shaft and a fastening bolt, and the sample can be accurately located and completely fixed; the clamp adaption part comprises an external thread adaption part, an internal thread adaption part and a connecting pin shaft. The slow tensile test clamp can be fixed to an existing support and connected with a stretching shaft, and clamping and axial stretching of the thin-walled tube arc-shaped sample are achieved. The slow tensile test clamp is simple in structure and convenient to assemble, can achieve precise locating and completely fix the sample, and can achieve the slow tensile test of the thin-walled tube arc-shaped sample in the high-temperature high-pressure water environment.

Description

technical field [0001] The invention relates to the stress corrosion test field of metals and their alloys, in particular to a fixture for slow tensile tests of thin-walled pipe arc samples in high-temperature and high-pressure water environments and a method for using it, which is suitable for testing thin-walled pipes in high-temperature and high-pressure water Stress corrosion cracking susceptibility studies. Background technique [0002] Stress corrosion cracking of thin-walled pipe components (such as steam generator heat transfer tubes) in high-temperature and high-pressure water environments (primary side temperature is about 326°C, pressure is about 15.8MPa; secondary side temperature is about 285°C, pressure is about 6.8MPa) It is an important issue facing the nuclear power industry at present. When studying the stress corrosion cracking susceptibility of materials, slow tension is one of the commonly used test methods, it passes slow strain rate (10 -4 ~10 -7 th...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a thin-walled tube arc-shaped sample high-temperature, high-pressure water slow tensile test fixture and its use method, which can solve the problem of inaccurate positioning of the thin-walled tube arc-shaped sample by the existing fixture, loose clamping, Problems such as complex structure, large size and not suitable for samples with semicircular clamping ends

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