Method for accurately measuring hydrogen evolution temperature range of steel product

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...

AI Technical Summary

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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