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Method for detecting boron in steel

A technology for the content of steel scraps and boron, which is applied in the preparation of test samples, thermal excitation analysis, material excitation analysis, etc. The effect of shortening inspection time, less environmental pollution and high sensitivity

Pending Publication Date: 2022-03-11
BENGANG STEEL PLATES
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Problems solved by technology

[0003] The traditional method of analyzing the boron content in iron and steel is to use chemical wet analysis (methanol distillation-curcumin photometry), but this method requires organic reagents such as acetone and quartz distillation equipment, long inspection time, exposure to toxic and harmful substances, and cumbersome inspection operations , causing great harm to the health of operators

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  • Method for detecting boron in steel

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Embodiment

[0049] The national standard samples of medium and low alloy steel, low alloy steel and microalloy steel are respectively selected to test the accuracy and precision of the method of the present invention.

[0050] Sample dissolution: Weigh 0.2000g sample into a 200mL quartz beaker (accurate to 0.0001g), add 30mL sulfuric acid solution (1+6), heat and dissolve the sample at low temperature until the sample is completely dissolved. Remove the beaker, wait for the solution to cool slightly, add a small amount of water to boil to dissolve the salt, the solution should be clear and free of impurities, cool to room temperature (if the sample contains high carbon content, filter operation is required), and set the volume in a 100mL volumetric flask, Dilute to the mark with distilled water.

[0051] Working curve: Weigh steel standard samples with different boron contents into 200mL quartz beakers respectively, operate according to the above sample processing steps, and transfer the ...

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Abstract

The invention relates to a method for detecting boron in steel, which comprises the following steps: putting 0.2-0.3 g of steel cuttings into a quartz beaker, adding a sulfuric acid solution into the quartz beaker, and controlling the heating temperature at 80-100 DEG C until the steel cuttings are completely dissolved; boiling and dissolving salts, wherein the solution is a solution for a working curve of an ICP spectrometer; and determining a linear relation and a correlation coefficient of the spectral lines. The method has the advantages that sample treatment steps are simple, time is short, pollution is small, and inspection time of a single sample is shortened. The dilute sulfuric acid solution is suitable for dissolving most of steel samples of different varieties, and the samples can be completely dissolved. Only dilute sulphuric acid is used in the chemical treatment process, waste liquid is easy to decompose, environmental pollution is small, and operation is easy and convenient. 208.959 nm of a spectral line is selected as an analytical line, the sensitivity is high, interference elements are small, and the boron detection range is wide.

Description

technical field [0001] The invention relates to a method for detecting boron in steel. Background technique [0002] The main function of boron in steel is to improve the hardenability of steel, improve the high temperature strength of steel, and strengthen the grain boundary. As the overcapacity of the domestic iron and steel industry becomes more and more serious, and the price of iron and steel continues to decline, major steel mills have prioritized the optimization of product structure, research and development of high-tech, high-value-added products, and research and development of boron-containing high-value-added steel. Only a very small amount can significantly improve the hardenability and replace a large number of alloying elements. In addition, it can also improve mechanical properties, cold deformation properties, welding properties and high temperature properties. The minimum addition limit of 0.0007% boron can already increase the hardness of the steel, if th...

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Application Information

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IPC IPC(8): G01N21/73G01N1/28
CPCG01N21/73G01N1/28
Inventor 李月华于丽泓连喜萍田玉伟李铁李秀忠教滨
Owner BENGANG STEEL PLATES
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