Method for accurately measuring steel hydrogen evolution temperature range

A temperature range, hydrogen evolution technology, applied in the investigation stage/state change and other directions, can solve the problems of high sample requirements, unable to give the actual trajectory of hydrogen, unable to accurately determine and other problems, to save energy, improve the effect of hydrogen evolution, dehydrogenation quick effect

Inactive Publication Date: 2016-08-10
JIANGYIN XINGCHENG SPECIAL STEEL WORKS CO LTD
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Problems solved by technology

However, the hydrogen evolution temperature range is currently mainly set by the experience of technicians, and cannot be accurately determined
Even if the hydrogen determination instrument produced by LECO can only measure the total amount of hydrogen content in the steel material, it cannot give the actual trajectory of hydrogen

Method used

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  • Method for accurately measuring steel hydrogen evolution temperature range

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Embodiment Construction

[0011] Below in conjunction with embodiment the present invention is described in further detail.

[0012] The method for measuring the hydrogen evolution temperature range of the steel material in this embodiment is to take a steel sample with an equivalent diameter in the range of Φ5mm×5mm~Φ20mm×50mm, and perform pretreatment on the steel sample: clean it with anhydrous alcohol in an ultrasonic scrubber Take the sample for 15 minutes, take out the sample and dry it with cold wind, weigh the sample mass with an electronic balance (accurate to 0.0001g) and record it.

[0013] Send the sample into the sampling chamber of the mass analysis electric furnace, vacuumize, and wait for the vacuum degree of the sampling chamber to reach 10 -6 After that, use the magnetic coupling guide rod to introduce the sample into the electric furnace, set the heating rate to 100-300°C / h, and the heating target temperature to be 800-850°C, and the target temperature should be higher than the opti...

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Abstract

The invention relates to a method for accurately measuring the hydrogen evolution temperature range of steel materials, which is to uniformly heat the pretreated steel samples to the target temperature in an ultra-high vacuum state, the heating rate is 100-300 °C/h, and the target temperature is 800 °C ~850°C; during the uniform heating process, use a hydrogen analysis mass spectrometer to measure the change of the hydrogen evolution rate of the sample with temperature, and find out the temperature range corresponding to the fastest range of hydrogen evolution rate according to the change law of hydrogen evolution rate with temperature, which is the test The optimal hydrogen evolution temperature range of the sample. It solves the problem that the temperature range is difficult to set in the traditional hydrogen expansion process, and can solve the problem that the previous hydrogen measurement method has limitations on the sample requirements. It is a simple, fast, accurate, and environmentally friendly method for measuring the optimum temperature of hydrogen evolution, which fills the blank that cannot accurately measure the hydrogen evolution temperature range of steel materials.

Description

technical field [0001] The invention belongs to the technical field of iron and steel physical and chemical inspection, and in particular relates to a method for measuring the optimum temperature interval of hydrogen element precipitation in steel. Background technique [0002] As we all know, hydrogen is harmful in steel. Residual hydrogen in steel can cause defects such as white spots, fish eyes, bubbling, and hydrogen-induced cracks in steel materials, and eventually lead to brittle failure of materials. Therefore, the control of hydrogen in steel materials Particularly important. The traditional hydrogen evolution method is to heat the steel material to the hydrogen evolution temperature range, then keep it warm for a period of time and then cool it for hydrogen expansion. However, the hydrogen evolution temperature range is currently mainly set by the experience of technicians, and cannot be accurately determined. Even if the hydrogen determination instrument produced...

Claims

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Application Information

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IPC IPC(8): G01N25/12
CPCG01N25/12
Inventor 秦志强钱刚许晓红白云康智清范海东兰楚惠孙以春倪磊周阳
Owner JIANGYIN XINGCHENG SPECIAL STEEL WORKS CO LTD
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