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Method for accurately measuring hydrogen evolution temperature range of steel product

A temperature range, hydrogen evolution technology, applied in the investigation stage/state change and other directions, can solve the problems of inaccurate determination, inability to give the actual trajectory of hydrogen, high sample requirements, etc., to save energy, improve the effect of hydrogen evolution, and fast dehydrogenation. Effect

Inactive Publication Date: 2016-11-09
中信泰富特钢投资有限公司
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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 precipitation in the steel, and the method of measuring the hydrogen content in the steel by using the hydrogen determination instrument has no effect on the test. The sample requirements are very high, and it can only adapt to samples of about 1g. This is also the measurement limitation of the hydrogen determination instrument.

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  • Method for accurately measuring hydrogen evolution temperature range of steel product

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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 a hydrogen evolution temperature range of a steel product. Under an ultrahigh vacuum state, a pre-treated steel product test sample is uniformly heated to a target temperature; a heating speed is 100 DEG C / h-300 DEG C / h, and a target temperature is 800 DEG C-850 DEG C; in a uniform heating process, the change of a hydrogen evolution amount along the temperature is measured by utilizing a hydrogen analysis mass spectrometer; and a temperature region corresponding to the rapidest range of a hydrogen evolution speed is found out according to a change rule of the hydrogen evolution speed along the temperature, and an optimal hydrogen evolution temperature range of the test sample is obtained. The problem in a traditional hydrogen diffusion process that the temperature range is difficult to set is solved, and the problems that a previous hydrogen measurement method has limitation on sample requirements and the like can be solved. The method is a simple, rapid, accurate and environment-friendly method for measuring an optimal temperature of hydrogen evolution, and the blank that the hydrogen evolution temperature range of the steel product cannot be accurately measured is filled.

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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Patent Type & Authority Applications(China)
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 中信泰富特钢投资有限公司
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