Lever-based slow tensile stress corrosion experimental device

Abstract

The invention discloses a lever-based slow tensile stress corrosion experimental device. The device comprises a lever balance system, a corrosion test system and a feedback adjustment system; the lever balance system comprises a lever and a lever bracket for supporting the lever; the left end of the lever is connected with the corrosion test system; the right end of the lever is provided with a weight device; the corrosion test system includes an electrochemical corrosion tank; the electrochemical corrosion tank is used for simulating a corrosive environment and fixing a sample; the electrochemical corrosion tank is connected with the left end of the lever; the feedback adjustment system is connected between the lever balance system and the corrosion test system; and the feedback adjustment system is used for adjusting the balance of the lever. According to the lever-based slow tensile stress corrosion experimental device of the invention, the load of the weight can be amplified by thelever structure, and therefore, additional stress on a rod can be reduced; before an experiment is performed, different loads can be loaded or the position of the weight can be moved, and therefore,a variety of creep stress stretching conditions can be provided. The device has the advantages of simplicity and accurate measurement. With the device adopted, the real-time monitoring of creep stressand displacement under a constant force can be realized.

Description

technical field [0001] The invention relates to the technical field of detection equipment, in particular to a lever-based slow tensile stress corrosion test device. Background technique [0002] Creep refers to the phenomenon that the strain of a solid material increases with time under the condition of keeping the stress constant. Mechanical creep testing machines are often used to determine the creep durability of metals. Most of the existing creep testing machines use lever loading, and the old lever creep testing machines mostly use artificial loading weights to apply tension. For The control accuracy of the constant force is low, and the error of the measured experimental data is relatively large. [0003] Most of the existing lever structure creep testing machines do not consider the constant force fluctuation caused by the change of the force direction caused by the moment the lever is tilted after the sample is stretched, and most of the commonly used leveling devi...

AI Technical Summary

Problems solved by technology

[0003] Most of the existing lever structure creep testing machines do not consider the constant force fluctuation caused by the change of the force direction caused by the moment the lever is tilted after the sample is stretched, and most of the commonly used leveling devices are handwheel adjustments with low accuracy , and few creep testing machines use experimental devices that combine creep stress and corrosive environment, and the applicability of materials in special engineering environments is different.

In the existing patent "a lever-type creep testing machine", its disadvantage is that when the lever is out of balance, it can be leveled by adjusting the height. During the leveling process, the constant force cannot be maintained, and there is no protection against the tensile fracture of the sample. Protection measures, the performance is relatively simple

"A mechanical high-temperature creep testing machine that can realize automatic and accurate loading", its disadvantage is that there is no measure to control the direction during the leveling process, the magnitude of the applied force is affected, and the range of applicable environments is relatively limited

"Interleaving corrosion test method and device based on slow tensile stress corrosion testing machine", its disadvantage is that it focuses more on electrochemical corrosion experimental methods, and the combination with slow tensile is not close enough, and its practicability is not perfect.

Images