Bainite steel color metallurgical-phase dye and color display method thereof

Abstract

The invention relates to a Bainite steel color metallurgical-phase dye and a color display method thereof, belonging to a metallurgical-phase display dressed agent of a steel material microscopic structure, in particular to a dressed agent for a steel color metallurgical phase and a color metallurgical-phase display method. The dye is prepared from the following components: 2.5-3.5 g of sodium metabisulfite, 8-12 g of sodium hyposulfite and 100 g of water. The color metallurgical-phase display method comprises the following steps of: sampling, grinding, polishing, preparing a dye, dying to form a film, cleaning the sample, observing the color microscopic structure, and collecting electronic images and corresponding black-white metallurgical-phase images. The invention has the advantages that the Bainite steel is displayed by adopting chemical dying and the color metallurgical phase, and compared and analyzed by using the black-white metallurgical phase, which has novel conception and simple, reliable and rapid procedures; the microscopic structure of the Bainite steel can be explicitly differentiated; residential austenite, Bainite, austenite among ferrite plates and ferrite in steel are clearly differentiated; reliable guarantee is provided for the microstructure and the quantitative analysis of a steel member; the research and the development of the product are promoted and remarkable economic benefits and social benefits are obtained.

Description

technical field [0001] The invention belongs to a decoration agent for metallographic display of steel material microstructure, in particular to a decoration agent for steel color metallographic display and a method for color metallographic display. Background technique [0002] Carbide-free bainitic steel is a new type of steel that can realize one steel with multiple grades, and has a good application prospect. The metallurgical products produced with this material have a complex structure of bainite, ferrite and retained austenite. Accurately distinguishing these complex multi-phase structures is of great significance for product development. At present, the research on the product structure is carried out by black and white metallographic method. It is easier to identify ferrite and bainite in the black and white metallographic structure, and the austenite can only be judged by theory and experience. This is because the color contrast of retained austenite is almost th...

AI Technical Summary

Problems solved by technology

This is because the color contrast of retained austenite is almost the same as that of ferrite, and its structure is relatively fine, which brings great difficulties to the actual identification work.

Its defect is: in the black and white metallographic observation, due to the insufficient contrast of the metal surface, the ferrite, the retained austenite in the steel, the bainite, and the austenite between the ferrite laths are all white, which cannot be distinguished. and identification, and even misjudgment, affecting scientific research and product development

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