Method for detecting hydrogen content in solid metal

Abstract

The invention relates to a method for detecting the content of hydrogen in solid metal. The method mainly comprises the following steps: putting the solid metal into a hydrogen evolution chamber; vacuumizing the hydrogen evolution chamber, introducing a carrier gas into the hydrogen evolution chamber to replace the hydrogen evolution chamber with a carrier gas atmosphere, and continuously introducing the carrier gas at a certain flow rate; heating the hydrogen evolution chamber to separate out hydrogen from the solid metal, and continuously obtaining the real-time hydrogen concentration in thehydrogen evolution chamber through a high-temperature hydrogen sensor in the hydrogen evolution chamber; and according to the real-time hydrogen concentration and the flowing speed of the carrier gas, carrying out integral treatment within the hydrogen evolution time to obtain the hydrogen content in the solid metal. According to the hydrogen measuring method, online detection of the hydrogen content is conducted while hydrogen is separated out of the solid metal sample, secondary collection of hydrogen is not needed, and compared with a traditional hydrogen measuring method, the method is more beneficial for improving the hydrogen content detection speed and the precision of detection data.

Description

technical field [0001] The invention relates to the technical field of substance content detection, in particular to a method for detecting hydrogen content in solid metals, such as a method for detecting hydrogen content in steel blocks, aluminum blocks, and metal welded joints. Background technique [0002] Hydrogen in metals such as steel, aluminum alloys, and titanium alloys is generally considered a harmful element. After iron and steel smelting or thermal processing, residual hydrogen will affect the mechanical and chemical properties of materials, especially high-strength structural steels. The hydrogen embrittlement produced by residual hydrogen will directly endanger the structural safety of components, and the content of diffused hydrogen in steel welded joints is too high Can induce hydrogen-induced cracking in containers. The detection of diffusible hydrogen content can be used to classify the grade of welding materials, and at the same time, it can refer to the...

AI Technical Summary

Problems solved by technology

The carrier gas thermal extraction method uses an inert gas to bring the precipitated hydrogen into the thermal conductivity cell or infrared detection module for testing. Due to the high hydrogen extraction temperature, a sample test can be completed within tens of minutes, but before the test It takes nearly 1 hour for the stabilization of the thermal conductivity test cell, and the overall efficiency is relatively low

In addition, since the thermal conductivity detection cell and the infrared detection module are both expensive, the cost of hydrogen measurement by this method is increased, and the structure of the hydrogen measurement device is also relatively complicated.

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