Iron and steel material scale EBSD sample preparation method

Abstract

The invention provides a steel and iron material scale EBSD sample preparation method which comprises the following steps: cutting out a piece of steel to be analyzed, and roughly grinding an observation surface of the steel to be analyzed; after rough grinding, sequentially carrying out inlaying, mechanical grinding and polishing, oxide polishing, vibration polishing and cutting on the observation surface, wherein the mechanical grinding and polishing comprises mechanical grinding and mechanical polishing, during mechanical polishing, suspension liquid of 9 microns, suspension liquid of 3 microns and suspension liquid of 1 micron are used respectively, and the polishing time is 9 min, 7 min and 7 min respectively; a suspension liquid used for oxide polishing is an aluminum oxide suspension grinding polishing solution, and the polishing time is 45 min. According to the prepared oxide scale EBSD sample, an oxide layer on the surface of steel is completely preserved, the surface protection effect is good, meanwhile, a steel base body of the sample makes direct contact with an EBSD sample table, good conductivity is guaranteed, and obvious image drifting in the detection process is avoided.

Description

technical field [0001] The invention relates to the technical field of material detection and analysis, in particular to an EBSD sample preparation method for iron and steel oxide scale. Background technique [0002] Since steel products pay more and more attention to anti-corrosion performance, surface quality, pickling behavior, etc., and the structure of the oxide scale is one of the key factors that determine the surface corrosion resistance, pickling behavior, and product surface quality of steel products, so it is necessary to treat oxidation The composition of the iron sheet is detected and analyzed. The EBSD analysis technology in the scanning electron microscope can analyze the FeO, Fe in the iron oxide scale through the crystallographic theory. 3 o 4 , Fe 2 o 3 Characterization of phase distribution and grain size is an important means for in-depth analysis of iron oxide scale. Since the EBSD analysis technique requires the surface of the sample to be tested t...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the iron oxide scale on the surface of the measured sample is combined with the steel matrix, and there is a large difference in mechanical properties between the steel matrix and the problem that it is easy to fall off during the sample preparation process.

Images