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Quantitative analysis method for continuous casting billet dendritic segregation

A technology of dendrite segregation and quantitative analysis, which is applied in the direction of analyzing materials, using wave/particle radiation for material analysis, measuring devices, etc., can solve the problems of time-consuming, random, inaccurate quantitative analysis, etc. strong effect

Inactive Publication Date: 2017-04-26
SHOUGANG CORPORATION
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Problems solved by technology

[0005] The purpose of the present invention is to provide a quantitative analysis method for dendritic segregation of continuous casting slabs, which solves the problems of blind and random selection of detection positions in existing methods, long time consumption and inaccurate quantitative analysis.

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  • Quantitative analysis method for continuous casting billet dendritic segregation
  • Quantitative analysis method for continuous casting billet dendritic segregation
  • Quantitative analysis method for continuous casting billet dendritic segregation

Examples

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Embodiment 380

[0024] This embodiment takes the 380CL wheel steel continuous casting slab as an example.

[0025] 1. Sample preparation:

[0026] First cut a block sample from the area near the center of the 380CL slab. The size of the sample is: 30mm long x 18mm wide x 20mm thick. Then the sample is cleaned, ground and polished and put into the electronic probe sample room for observation. test.

[0027] 2. Electron probe surface analysis:

[0028] (1) Open the "Mapping" module of the electron probe analysis software, select the Mn element as the analysis element, set the acceleration voltage to 20KV, the beam current to 400nA, the beam spot size to 1μm, select the analysis area of ​​4mm×3mm, and click "Operate" to analyze the Mn element. face scan analysis.

[0029] (2) After the analysis is completed, click the "color setting" icon to optimize the color of the surface analysis diagram of the Mn element with a content range of 0 to 100%. The segregation content of the Mn element is abou...

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Abstract

Belonging to the technical field of metal material detection, the invention relates to a quantitative analysis method for continuous casting billet dendritic segregation. The method includes: sample preparation: controlling the sample diameter less than or equal to 30mm; electron probe surface analysis: setting an acceleration voltage of 15-30kV, and a beam current of 100-500nA, etc.; selection of segregation and substrate position; electron probe quantitative analysis: applying a "Quantitative" module for quantitative element analysis using ZAF correction method; and result analysis and data processing: representing the dendritic segregation degree of an element with dendrite segregation ratio, etc. The method provided by the invention has the advantages of strong pertinence and high result analysis accuracy.

Description

technical field [0001] The invention belongs to the technical field of metal material detection, in particular to a quantitative analysis method for dendritic segregation of continuous casting slabs. [0002] technical background [0003] At present, there are few literature reports on the quantitative analysis method of dendritic segregation of continuous casting slab. The existing method is mainly to take multiple points along a line on the slab sample for quantitative analysis by electronic probe, that is, the method of multi-point statistics Determine the segregation degree of the slab, but this method has certain limitations. This is because the surface of the slab sample requires polishing during the quantitative analysis of the electronic probe, and the polished sample cannot be directly observed in the electronic probe. To the dendrite structure, that is, the position of the element segregation area and the normal area cannot be determined, so the selection of the det...

Claims

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Application Information

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IPC IPC(8): G01N23/225G01N1/32
CPCG01N23/2251G01N1/32
Inventor 严春莲鞠新华任群尹立新其其格温娟
Owner SHOUGANG CORPORATION
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