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Online automatic detection method for nitrogen content in steel

A technology of automatic detection and nitrogen content, which is applied in the field of online automatic detection of nitrogen content in steel and analysis of steel composition, and can solve problems such as detection accuracy not up to standard

Pending Publication Date: 2021-11-05
SGIS SONGSHAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the purpose of the embodiment of the present application is to provide an online automatic detection method for nitrogen content in steel, so as to solve the technical problem that the detection accuracy is not up to standard when measuring the nitrogen content in steel by direct reading spectrometer analysis method in the prior art

Method used

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  • Online automatic detection method for nitrogen content in steel
  • Online automatic detection method for nitrogen content in steel
  • Online automatic detection method for nitrogen content in steel

Examples

Experimental program
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Effect test

Embodiment 1

[0072] Provided is an on-line automatic detection method for nitrogen content in steel, comprising the following steps: (1) setting and using technical parameters. The time for the air-delivered sample receiving manipulator to accept the description and put the steel sample into the vise position of the double-station milling machine is 4.5s. The sample depth is 0.7mm, the time for the spectroscopic analysis manipulator to send the racket steel sample to the excitation platen of the direct-reading spectrometer is 10s, and the technical parameters of the direct-reading spectrometer include rinsing time 3s, pre-burning time 1s, exposure time 5s, etc. , the flow of argon is 710L / h, the pressure of argon in the pipeline is 0.8MPa, 0.84MPa, 0.88MPa, 0.90MPa, and it is decompressed to 0.40MPa, 0.42MPa, 0.44MPa, 0.45MPa before being transported to the spectrometer.

[0073] (2) Draw the working curve. The national standard material and the industry standard material were selected as...

Embodiment 2

[0081] According to the automatic detection method of nitrogen content in Example 1, the argon gas pressure in the pipeline is 0.55, 0.58, 0.60, 0.62, 0.65, 0.68, 0.69, 0.71, 0.74Mpa, and it is decompressed twice to 0.36, 0.38, 0.39 before being transported to the spectrometer. , 0.40, 0.42, 0.44, 0.45, 0.46, 0.48Mpa.

[0082] The argon pressure in the pipeline is 0.72, 0.76, 0.78, 0.92, 0.96Mpa, and the pressure is reduced to 0.36, 0.38, 0.39, 0.46, 0.48Mpa for the second time before being transported to the spectrometer.

[0083] The method of Example 1 and Example 2 was used to determine the nitrogen content of the Q345 steel production samples. The specific results are shown in Table 2.

[0084] Table 2 Different argon pressure values ​​of the direct-reading spectrometer and the ratio of the pressure of the direct-reading spectrometer to the argon pressure of the pipeline, the nitrogen content value of Q345 steel was determined

[0085]

[0086]

[0087] It can be see...

Embodiment 3

[0089] According to the automatic detection method of nitrogen content in Example 1, measure the nitrogen content of the standard samples YSBS11188a-2016 and IMZ110A, the pressure of the direct-reading spectrometer is 0.42MPa, and the ratio of the pressure of the direct-reading spectrometer to the argon pressure in the pipeline is selected as 0.30, 0.35, and 0.40. , 0.45, 0.50, 0.55, 0.60, 0.65, 0.70, the specific results are shown in Table 3 and Table 4.

[0090] Table 3 The ratio of the pressure of the direct reading spectrometer to the argon gas pressure in the pipeline to measure the nitrogen content of the YSBS11188a-2016 standard sample

[0091]

[0092] Table 4 Determination of nitrogen content of IMZ110A standard sample by the ratio of different direct reading spectrometer pressure and pipeline argon pressure

[0093]

[0094] From Table 3 and Table 4, the ratio of the pressure into the direct reading spectrometer to the argon pressure in the pipeline is 0.4 to 0...

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Abstract

An online automatic detection method for nitrogen content in steel comprises the following steps of setting technical parameters, drawing a working curve, preparing a racket steel sample, sending the racket steel sample to a direct-reading spectrometer excitation bedplate by a spectral analysis manipulator, photographing the racket steel sample by a visual system, selecting a proper excitation point through image processing, exciting the racket steel sample, uploading detection data to an LIMS control system, and using an SPS system for completing process control among the devices in the automatic detection process. The detection atmosphere of the direct-reading spectrometer is high-purity argon, the flow of the argon is 710-720 L / h, the argon is subjected to secondary pressure reduction before entering the direct-reading spectrometer, and the ratio of the pressure entering the direct-reading spectrometer to the pressure of the argon in the pipeline is 0.4-0.6. The detection precision of the N element in the Q345 series steel is improved, the nitrogen content in the steel is rapidly, efficiently and accurately detected and analyzed, and reliable and timely detection data support is provided for fast-paced production of a steelmaking process.

Description

technical field [0001] The invention belongs to the technical field of iron and steel analysis, and relates to an analysis method for iron and steel components, in particular to a nitrogen content in iron and steel (mainly for the content of Si in the range of 0.15wt% to 0.45wt% and the content of Mn in the range of 1.30wt% to 1.60wt%). , N≤70ppm steel grades) online automatic detection method. Background technique [0002] Nitrogen in steel mainly exists in the form of nitride, which has harmful effects such as aging and embrittlement. When heated, the phenomenon of "blue embrittlement" will appear. At present, the nitrogen content in the Q345 series and other steel grades produced by the company is determined by oxygen and nitrogen analyzers, which are cumbersome in the determination process, labor-intensive and high in detection cost. 37min fast-paced production needs problems. The increase in the demand for steelmaking capacity has put forward higher requirements for t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/25G01N21/01G01N21/13
CPCG01N21/25G01N21/01G01N21/13G01N2021/0112
Inventor 黄合生王震余雷欧富邢文青吴超超郝志奎胡乐明
Owner SGIS SONGSHAN CO LTD
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