In situ quantitative determination method for large-sized metallic inclusion

Abstract

The invention relates to a method for quantitatively determining inclusion in large-scale metal at original position, which belongs to the field of steel determination and analysis technology. The method comprises the following steps of: respectively intercepting a cross section with a length of 100 to 500 mm for continuous casting slab, bar material, H-shaped steel or plate material, longitudinally intercepting a sample with a width of 10 to 20 mm from the surface to the core portion, cleaning the surface of the steel sample, applying a resin adhesive layer except for the original surface of the steel, electrolyzing the sample for 4 to 10 times until the portion of the sample in the electrolyte is completely electrolyzed, and subjecting inclusions collected by each electrolysis step and the each electrolyzed sample layer to routine analysis by using a microscope, an original position analyzer and a spectrometer. Since the sample and the electrolyzed steel material is an integral sample from the surface to the core portion, the method can determine the change of inclusions and precipitates from the surface to the core portion of the steel sample, thus factually representing the distribution of inclusions and precipitates in large-scale metal.

Description

technical field

[0001] The patent of the present invention relates to a method for detecting metal inclusions, in particular to a method for in-situ quantitative detection of large metal inclusions. Background technique

[0002] The quality of iron and steel products is becoming more and more important to iron and steel enterprises. The content distribution of inclusions in metals is an important part of evaluating product quality. In-situ quantitative detection of inclusions in metals has always been a difficult problem. For large metal (here, large metal refers to metal with a mass of more than 20Kg per meter) structural components, continuous casting slabs, round steel, section steel, plate and strip large steel, in-situ detection of inclusions from the surface to the core , precipitates, and composition changes, the method adopted in the prior art is to take samples at different parts, and use instruments such as in-situ analyzers, microscopes, and spectra to analyze and...

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