Spectral analysis method for online detecting size distribution of inclusions in steel
A particle size distribution and spectral analysis technology, applied in the field of metal material detection, can solve problems such as low precision and unreasonable analysis methods, and achieve the effects of improving product qualification rate, realizing online quality control, and reducing costs.
Inactive Publication Date: 2007-10-17
ANGANG STEEL CO LTD
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In addition, there is no calculation method for the maximum particle size of inclusions in the Japanese patent
The accuracy of this method is low, and the analysis method is not reasonable enough
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[0035] The specific embodiment of the present invention is described below in conjunction with accompanying drawing, here only with the analysis of Al in the automobile sheet steel 2 o 3 Take inclusions as an example.
[0036] Using the device shown in Figure 4, the spectral analysis method for online detection of particle size distribution of inclusions in steel consists of the following steps:
[0037] 1) In the inert gas environment in the luminous table (2), perform a pre-discharge of 200-700 pulses between the steel sample and the counter electrode, and then conduct a formal spark discharge of 1500-2000 pulses;
[0038] 2) The luminescence of each spark discharge is spectroscopically obtained in the spectroscopic device (1) to obtain the spectral lines of each element, and the critical value of the inclusion intensity of the metal element aluminum and the critical value of the oxygen intensity of the inclusion monitoring element are obtained in the calculation device (5)...
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The invention provides a spectrum analyzing method of on-line detecting the particle size distribution of inclusions in the steel. On the nitrogen condition, make predischarge and formal spark discharge between the metal sample and electrode pair, make light split analysis on metal element and inclusion-monitor oxygen element, use data processor to make programming and calculating processing on the spectrum data to calculate the total strength of the inclusions, calculate out the contain of the inclusions in the sample according to the preset inclusion strength-content correcting curve, calculate out the particle size distribution of the inclusions according to the weight difference of the sample excited before and after, according to 10 measured results of the particle size distribution and by extremum statistical method, calculate the maximum particle size of the inclusions. It controls refining course according to the detecting result, thus remarkably reducing the rejection quantity caused by the inclusions and enhancing the steel quality. It is applied to analysis on the particle size distribution of the inclusions in the steel such as Al2O3, SiO2, MnO, CaO and MnS.
Description
technical field [0001] The invention belongs to the technical field of metal material detection, in particular to a spectral analysis method for online detection of particle size distribution of inclusions in steel. Background technique [0002] The traditional particle size distribution of inclusions in steel is detected by means of optical microscope, electron probe and imager analysis. The accuracy of these detection methods is affected by external conditions such as sample preparation and the level of inspectors, and the analysis time is long. . If the quality of the finished product is caused by inclusions, the quality of the steel produced in the future can be solved by checking the quality of the slab and adjusting the smelting process, but the quality of the steel that has already been produced cannot be solved, so the scrap rate is high. If the size of the inclusions in the steel exceeds a certain limit, the steel will be prone to cracks and its fatigue performance...
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IPC IPC(8): G01N21/67
Inventor 唐复平栗红常桂华薛占强
Owner ANGANG STEEL CO LTD