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Spectral analysis method for online detecting the number and content of inclusions in steel

A technology of inclusion and content, applied in electrical excitation analysis, material excitation analysis, etc., can solve the problem that the determination method is not specified, and achieve the effect of reducing waste and improving accuracy

Inactive Publication Date: 2007-10-17
ANGANG STEEL CO LTD
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Problems solved by technology

In the disclosed method, the method for determining the critical value of oxygen, nitrogen, and solid solution aluminum is not specified, and no pre-discharge is performed when the analysis conditions are set.

Method used

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  • Spectral analysis method for online detecting the number and content of inclusions in steel
  • Spectral analysis method for online detecting the number and content of inclusions in steel
  • Spectral analysis method for online detecting the number and content of inclusions in steel

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Embodiment Construction

[0032] The specific embodiment of the present invention is described below in conjunction with accompanying drawing, here with the analysis of Al in aluminum deoxidized steel 2 o 3 Inclusions, for example.

[0033] Using the device shown in Figure 4, the spectral analysis method for online detection of the number and content of inclusions in steel consists of the following steps:

[0034] 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 perform a formal spark discharge of 1500-2000 pulses;

[0035] 2) The luminescence of each spark discharge is split in the spectroscopic device (1) to obtain the spectral lines of each element, and the pulse intensity diagram of the metal element aluminum, the oxygen pulse intensity diagram and their respective intensity frequencies are obtained in the calculation device (5) The distribution diagram, determining the critical value ...

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Abstract

The invention provides a spectrum analyzing method of on-line detecting the number and content of inclusions in the steel. On the nitrogen condition, make predischarge and formal spark discharge between the metal sample and electrode pair, make lighting and light split analysis on the metal element and oxygen element, research and determine the critical value of metal element inclusion strength and that of inclusion-monitoring oxygen element strength, find out the abnormal pulse of metal element of each critical value of inclusion strength, and determine the number of the inclusions. By data processing and in comparison with the preset correcting curve of inclusion strength and content, determine and analyze the content of the inclusions in the sample. It can analyze the element content and fast analyze the content of inclusions in the sample, samples and detects the number and content of the inclusions in the refining procedure and controls the refining technique 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 number and content 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 the number and content of inclusions in steel. Background technique [0002] Detecting the number and content of inclusions in steel is an important part of determining the intrinsic quality of steel. The conventional detection methods currently used mainly use the chemical analysis method to detect the content, and the metallographic method to detect the number of inclusions. These methods are too slow. It takes 5-7 days from sample preparation to analysis results, and cannot detect the information of inclusion content in each steelmaking process in time. It has no benefit for improving the steelmaking process and cannot meet the requirements for controlling product quality. If Al in finished steel 2 o 3 If the content of such inclusions is too large, the performance of the steel will fluctuate greatly, the p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/67
Inventor 唐复平常桂华栗红薛占强
Owner ANGANG STEEL CO LTD
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