Method for rapid characterization of segregation of bearing steel by using electronic probe

Abstract

The invention discloses a method for rapid characterization of segregation of bearing steel by using an electronic probe. Test is carried out by an electronic probe analyzer, the types of segregation elements in the steel can be determined by a wavelength dispersive spectrometer point analysis function, the surface of a whole sample can be scanned by a surface scanning function of a wavelength dispersive spectrometer, segregation of the sample is visually characterized by different colors, and therefore, the segregation degree of the steel can be observed clearly. By the method, boundedness that the electronic probe only can be used for micro probe analysis is broken, large-area segregation, particularly characterization of segregation of a casting blank, can be carried out. The method is seldom interfered by human factors, characterization analysis of large-area element segregation degree in the steel can be carried out rapidly, the problem that the electronic probe in the prior art only can be used for segregation of elements by micro probe analysis is solved effectively, and the method has important reference significance on development of steel grades and process improvement.

Description

technical field [0001] The invention belongs to the technical field of detection, in particular to a method for quickly characterizing bearing steel segregation by using an electronic probe. Background technique [0002] High-carbon chromium bearing steel has the performance characteristics of higher strength, which requires its continuous casting slab to have good solidification quality and avoid defects such as central segregation, porosity and cracks. As a common quality problem of high-carbon bearing steel, macro-carbon segregation has a significant impact on the life of bearing steel. Its formation mechanism is closely related to the solidification structure of high-carbon bearing steel continuous casting slabs. The structure of the cast slab changes during the rolling process, but the distribution and shape of carbon segregation are still preserved, but the degree of segregation has been improved to a certain extent. It can be seen that carbon segregation is hereditary...

AI Technical Summary

Problems solved by technology

Therefore, accurate evaluation and characterization of segregation has good guiding significance for the performance improvement and process improvement of bearing steel. At present, the evaluation of bearing steel segregation is mainly carried out through low-magnification experiments, but low-magnification experiments are affected by factors such as corrosion degree and artificial definition. , there is a certain error

However, the use of scanning electron microscopy and electron probe analysis for segregation characterization is limited because of the relatively high requirements for sample preparation and the relatively long time for characterization analysis.

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