Quantitative detection method of ferrite content in silicon steel

Abstract

The invention discloses a quantitative detection method of ferrite content in silicon steel. The quantitative detection method comprises the following steps: S1, pre-drawing a specimen size on the silicon steel and intercepting a specimen from the silicon steel; S2, carrying out high-temperature treatment, cooling, high-temperature treatment and cooling on the specimen; S3, respectively carrying out water milling and polishing on the detection surface of the specimen and then flushing the detection surface with clear water; S4, respectively connecting two ends of the polished specimen in the S3 with a positive electrode and a negative electrode of a power supply; then putting the specimen into a plastic cup containing an aggressive agent, connecting to the power supply, eroding and dryingby using drying equipment after the erosion is finished; S5: collecting n pieces of image maps of the corroded surface through a microscope; S6, calculating the average content of ferrite in each image map according to each image map of the specimen; S7, calculating the average content of the ferrite according to the average content of the ferrite in each image map of the specimen. By adopting themode, the quantitative detection method disclosed by the invention can improve the detection accuracy of the ferrite content in the silicon steel.

Description

technical field [0001] The invention belongs to the technical field of iron and steel material detection, in particular to a method for detecting ferrite content in silicon steel. Background technique [0002] The content of austenite and ferrite has a great influence on the mechanical properties, corrosion resistance and processing performance of steel materials, and the correct determination of the ferrite content has become a crucial issue. [0003] At present, the most practical way to determine ferrite is to use chemical analysis-atlas method. As long as the chemical composition of austenite and steel materials is measured, the ferrite content can be quickly determined. In actual production, if a portable spectrometer is used, the on-site non-destructive and rapid judgment of the ferrite content of austenite and duplex stainless steel can be realized. And these maps are more effective for semi-quantitative prediction of ferrite content in stainless steel. Chinese pate...

AI Technical Summary

Problems solved by technology

[0004] A large number of experiments and investigations have shown that due to the influence of comprehensive factors such as thermal process factors, component chemical analysis errors, and organizational errors and limitations, there will be a large deviation between the calculated value and the measured value.