Method for measuring misch metal solid solubility in steel and iron materials

Abstract

The invention discloses a method for measuring misch metal solid solubility in steel and iron materials. An absolute ethyl alcohol electrolyte of LiCl+ triethanolamine+ ethylene glycol+ diphenylguanidine+ benzene 1.5% is selected to carry out low-temperature electrolysis, and then solid solution rare earth is separated from rare earth second-phase inclusions, and convent measurement is carried out after treatment by means of a spectrophotometer. The method can achieve rare earth solid solubility measurement safely, reliably and cheaply in laboratory research and production practice, and has the advantages of being high in sensitive degree, safe in experimental process, easy and convenient to operate, and the like, and experimental equipment and drugs are cheap and easy to obtain, and the like.

Description

[0001] technical field [0002] The invention relates to a method for measuring the solid solubility of mixed rare earths in iron and steel materials, and belongs to the technical field of physical and chemical detection. Background technique [0003] Adding a certain amount of rare earth to steel materials will have a certain beneficial effect on its structure and performance, which has been recognized by the world. However, until now, the existence form and action mechanism of rare earth elements in iron and steel materials have not been studied clearly. [0004] In the 1970s, Japan’s Kawamura Kazuro used electrolysis and separation to measure rare earth inclusions, so the difference between the rare earth inclusion content and the total amount in steel was estimated as the solid solution of rare earth in steel. This method has low sensitivity and large error because it is affected by the error superposition and interaction of indirect measurement by subtraction method an...

AI Technical Summary

Problems solved by technology

Han Qiyong and Fang Keming have also used the radioisotope tracer method to measure the solid solution of rare earth in steel, which is less sensitive than the subtraction method, but this method is carried out by remelting the sample and artificially adding a certain amount of radioisotope tracer. Determination, the test sample is not taken from industrial production and experimental preparation materials, so it cannot be used for actual measurement

Then Dong Xiaokui and Zhou Yufen used the electrolytic method to measure the solid solubility of rare earth. The method used in the separation of rare earth ions involves some relatively strong chemical reactions, so it is more dangerous during the experiment.

In the 1990s, Ye Wen and Lin Qin invented the direct method to measure the solid solubility of rare earths in steel. The whole process is relatively scientific and reasonable, but the equipment used in the experiment, the plasma spectrometer (ICP), is relatively expensive, and it is difficult to promote it in production practice.

Images