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Device and method for nondestructive measurement of hydrogen content in solid steel

A hydrogen content, solid technology, applied in the direction of measuring devices, material analysis through electromagnetic means, instruments, etc., can solve the problems of small hydrogen diffusion coefficient, slow measurement speed, uneven distribution of hydrogen, etc., and achieve simple test steps, test Accurate, fast testing results

Active Publication Date: 2020-12-25
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The electrochemical method can realize the hydrogen measurement of service steel parts, but due to the limitation of the electrolyte, it can only be practical at room temperature
The hydrogen diffusion coefficient in steel at room temperature is small, resulting in slow measurement speed; in addition, it is difficult to seal between the electrolyte and solid steel, and it is easy to produce a steel-electrolyte-gas three-phase interface, which causes the atmosphere to interfere with the measurement results; difficult sealing leads to This method is more suitable for point measurement, and cannot realize the point-by-point scanning test of steel parts, and the hydrogen distribution in steel is not uniform, making it difficult to find hydrogen accumulation areas

Method used

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  • Device and method for nondestructive measurement of hydrogen content in solid steel
  • Device and method for nondestructive measurement of hydrogen content in solid steel
  • Device and method for nondestructive measurement of hydrogen content in solid steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] The structure of the device for non-destructive measurement of hydrogen content in solid steel is as follows figure 1 As shown, it includes a high-temperature proton conductor 1, a support tube 2 and a sealing cover 6;

[0078] The high-temperature proton conductor 1 is barrel-shaped, the outer wall is coated with a porous electrode 4 and the auxiliary thermal electrode 12, and the inner wall is coated with a reference electrode 10; the top of the high-temperature proton conductor 1 and the bottom end of the support tube 2 are sealed and bonded by a high-temperature adhesive 3 fixed together;

[0079] The support pipe 2 is cylindrical, and the top end is sealed and fixed with the sealing cover 6; the sealing cover 6 is an inverted barrel shape, and the side wall is provided with an air outlet pipe 7, the air inlet pipe 5 passes through the top plate of the sealing cover 6, and the bottom of the air inlet pipe 5 The end is located inside the high temperature proton cond...

Embodiment 2

[0099] The structure of the device for non-destructively measuring the hydrogen content in solid steel is the same as in Example 1;

[0100] Method is with embodiment 1, and difference is:

[0101] (1) The reference gas is N 2 -H 2 Standard gas; solid steel material to be tested is 304 austenitic steel;

[0102] (2) The target temperature is 1000±0.5°C (1273±0.5K);

[0103] (3) The measured voltage between the inner wall and the outer wall of the high-temperature proton conductor 1 is -0.1136V, and the voltage between the inner wall of the high-temperature proton conductor 1 and the solid steel 19 to be measured is -0.0872V measured by the second voltmeter 17;

[0104] S at 1000°C 0 =5.79ml / 100g;

[0105] Measured hydrogen content S [H] = 2.33ml / 100g.

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Abstract

The invention discloses a device and a method for nondestructive measurement of hydrogen content in solid steel. The device comprises a high-temperature proton conductor, a supporting pipe and a sealing cover, wherein the outer wall of the high-temperature proton conductor is coated with a porous electrode and an auxiliary heating electrode, the inner wall is coated with a reference electrode, thereference electrode and the porous electrode are connected with a first voltmeter, the porous electrode and the solid steel to be measured are connected with a second voltmeter, and the solid steel to be measured is in compression contact with the high-temperature proton conductor. The method comprises the following steps of (1), introducing reference gas into the device for nondestructive measurement of the hydrogen content in the solid steel; (2), heating the high-temperature proton conductor to a target temperature; (3), measuring the voltage between the inner wall and the outer wall of the high-temperature proton conductor through the first voltmeter, and measuring the voltage between the outer wall of the high-temperature proton conductor and the solid steel to be measured through the second voltmeter; and (4), calculating the hydrogen content at the contact part of the high-temperature proton conductor and the solid steel to be measured. According to the device and the method, nondestructive hydrogen measurement of service steel parts can be realized, the test is accurate, the test speed is high, the steps are simple, the hydrogen content of the steel parts can be measured through point-by-point scanning, and the hydrogen gathering area can be found in time.

Description

technical field [0001] The invention relates to a technology for measuring hydrogen content, in particular to a device and method for nondestructively measuring hydrogen content in solid steel. Background technique [0002] Hydrogen is a harmful element in iron and steel materials, which will cause defects such as cracks and white spots in the material, and lead to hydrogen embrittlement of steel and reduce its mechanical properties; when steel materials are in an atmosphere containing water, hydrogen, or hydrogen sulfide, hydrogen or hydrogen-containing compounds will React with iron and steel materials to produce dissolved hydrogen, which enters the iron and steel materials, causing hydrogen embrittlement. During the use of steel materials, the fracture of hydrogen embrittlement materials will lead to accidents; therefore, measuring the hydrogen content in steel materials can detect high-risk hydrogen embrittlement materials in time, and can be replaced in time to avoid ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/417
CPCG01N27/417
Inventor 丁玉石厉英
Owner NORTHEASTERN UNIV
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