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Experiment device for axial loading high-temperature stress corrosion test of metal material

A technology of axial loading and stress corrosion, applied in the direction of applying stable tension/pressure to test the strength of materials, measuring devices, analyzing materials, etc., can solve problems such as leakage/leakage, achieve convenient loading and unloading of samples, and improve test efficiency , good effect

Inactive Publication Date: 2013-03-27
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide an environmental device for axially loaded high-temperature stress corrosion tests on metal materials, which can not only completely avoid the problem of high-temperature medium leakage / leakage, but also keep the concentration of the medium constant and will not Cause the medium to splash, and at the same time facilitate the replacement and maintenance of the burned out resistance wire during the test, accurately ensure the medium temperature requirements, and avoid the abnormal termination of the test

Method used

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  • Experiment device for axial loading high-temperature stress corrosion test of metal material
  • Experiment device for axial loading high-temperature stress corrosion test of metal material

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Embodiment 1: Boiling point temperature medium solution stress corrosion test

[0026] Take the stainless steel bellows boiling magnesium chloride stress corrosion test as an example. Measure the diameter (round sample) or length and width (plate sample) of the working part of the sample, calculate the cross-sectional area of ​​the working part of the sample and the applied load; weigh an appropriate amount of magnesium chloride according to the size of the medium bottle and put it in in the medium bottle; figure 2Install the test environment device and samples on the loading testing machine; slowly add a small amount of high-purity water from the condenser port to submerge the magnesium chloride; press the terminal control switch to the "ON" position to start Heat the environment device; observe the test temperature during the process. When the temperature exceeds the required temperature, slowly add a small amount of high-purity water from the condenser mouth, and r...

Embodiment 2

[0027] Embodiment 2: Non-boiling point temperature medium solution stress corrosion test

[0028] Take the high-strength steel bolt 80 ℃ low concentration NaOH stress corrosion test as an example. Compared with Example 1, the difference is: (1) in accordance with the attached figure 2 Before installation, it is not necessary to weigh an appropriate amount of NaOH and put it into the medium bottle, but to prepare a NaOH solution of the corresponding concentration for use; (2) According to the attached figure 2 During installation, the 15 thermometer is not used, but the thermocouple of the 15 temperature control system; (3) After installation, what is poured from the condenser 12 is not high-purity water, but a prepared NaOH solution of corresponding concentration. (4) It is not necessary to add a small amount of high-purity water slowly from the condenser mouth repeatedly until the required temperature is reached. Other processes are the same as in Example 1.

[0029] Not...

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Abstract

The invention discloses an experiment device for an axial loading high-temperature stress corrosion test of a metal material. The experiment device comprises a medium bottle, two rubber seal cones, two gaskets, an upper thread port cover, a lower thread port cover, a rubber seal plug, a U-shaped heating tube, a reflux condensing tube, a resistance wire, a temperature control system, a ceramic tube, binding posts with control switches, and wires, wherein the gaskets are arranged on the connections of the thread port covers and thread ports, a lower drip mouth is adopted as circular reflux condenser, and the opening part of the U-shaped heating tube penetrating through the inner part of the medium bottle is arranged outside the bottle. The experiment device has the advantages of completely avoiding the problems of leakage / leaking of a corrosive medium in the process of the axial loading high-temperature stress corrosion test, constantly maintaining the requirements of concentration and temperature of the medium, preventing the medium from spattering when replenishing volatilized water is replenished, preventing the test from being improperly stopped, ensuring the safety and accuracy of the test, increasing the test efficiency and being good in using effect.

Description

technical field [0001] The invention relates to a metal material corrosion test detection technology, in particular to an environmental device for the metal material axially loaded high-temperature stress corrosion test. Background technique [0002] Under the dual effects of tensile stress and specific medium environment, metal materials have the possibility of delayed cracking and fracture by themselves. The resulting low-stress corrosion brittle fracture is unpredictable and often leads to accidents and the loss of a large amount of materials, which brings great safety hazards and property losses to engineering applications. For this reason, stress corrosion cracking of metal materials is an important field of material anticorrosion and safety reliability research, and stress corrosion test is an important basis for stress corrosion research, and the accuracy of the results directly affects the reliability of the project. [0003] At present, the stress corrosion test of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N17/00G01N3/18
Inventor 查小琴梁健张利娟
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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