Method for measuring ultratrace calcium content of cold and hot rolled sheets
A technology of ultra-trace and calcium content, applied to ultra-trace calcium content in hot-rolled sheet, ultra-trace calcium in hot-rolled sheet, determination of cold, and determination of cold field by using DC glow emission spectrometer, which can solve the problem that cannot meet ultra-trace calcium content. Calcium content test requirements and other issues, to achieve the effect of strong applicability, less spectral interference, and low consumables
Active Publication Date: 2013-07-03
ANGANG STEEL CO LTD
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Problems solved by technology
Existing analysis techniques and sample surface treatment methods can not meet the test requirements for ultra-trace calcium content in cold and hot rolled sheets
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[0033] The present invention adopts the direct current glow spectrum instrument (or the same type of glow spectrum instrument) and selects its working conditions through the preparation and grinding and polishing of the sample, adopts an orthogonal design table, and uses variance analysis and regression analysis. Optimize the selection of light source parameters, and establish a calibration curve for sample analysis.
[0034] The present invention will now be described in detail in conjunction with specific embodiments. Samples are taken and cut into rectangles with a length of 50-100 mm and a width of 12.5-20 mm. One end of the cold-rolled and hot-rolled sheet is bent to grow about 20-30mm, and the bending section is 30°-120° horizontally with the length direction of the plate. Select silicon carbide (or zirconia, aluminum oxide) water-grinding paper with a thickness of 120 μm and above to perform surface grinding and polishing on a metallographic grinding and polishing machi...
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Abstract
The invention discloses a method for measuring the ultratrace calcium content of cold and hot rolled sheets, which comprises: preparing and polishing a sample; selecting a direct current glow spectrometer or another glow spectrometer of the same type and selecting the working conditions of the spectrometer; selecting an orthogonal array; optimizing light source parameter conditions by using variance analysis and regression analysis; and finally, performing sample analysis. The method solves the problem of quickly testing the ultratrace calcium content of the cold and hot rolled sheets, ensures analyzing and testing capabilities by sample optimization and light source parameter optimization and realizes the quick qualification and quantification of the ultratrace calcium content of the cold and hot rolled sheets. The method has the advantages that: the material consumption is low; reagent environment pollution is prevented; spectral interference in an analysis process is small; the operation is simple; the analysis efficiency is high; and the analysis result is accurate. The method is also suitable for quick qualification and quantification of the calcium content (ranging from 0.00010 to 0.0010 percent) of pure steel and medium and low alloy steel.
Description
technical field [0001] The invention belongs to the detection field of the metallurgical industry, and in particular relates to a method for measuring ultra-trace calcium content in cold-rolled and hot-rolled thin plates, especially a method for measuring ultra-trace calcium in cold-rolled and hot-rolled thin plates by using a DC glow emission spectrometer. Background technique [0002] Calcium is a beneficial element in the steel smelting process because its mass percentage content in steel is very small. It can quickly remove the oxygen content in molten steel and greatly reduce the oxygen content in steel. Calcium can promote and improve the internal structure and structure of steel, improve the cutting performance and strength of steel, and act as a nodularizer. It is used to purify molten steel and reduce the total amount of inclusions in steel, so that steel has excellent physical properties. Calcium element is easily lost by oxidation during the smelting process. Thro...
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IPC IPC(8): G01N21/66G01N1/28G01N1/32
Inventor 邓军华李宪林于媛君戚淑芳
Owner ANGANG STEEL CO LTD