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Slab Inclusion Detection Method

A detection method and a technology of inclusions, which are applied in the direction of measuring devices, preparation of test samples, and optical testing of flaws/defects, etc., can solve the problems of low detection efficiency and high detection cost, reduce detection costs, improve accuracy, and eliminate The effect of discontinuity and chance

Active Publication Date: 2022-07-19
CONTINUOUS CASTING TECH ENG OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The object of the present invention is to provide a method for detecting slab inclusions to solve the problems of high detection cost and low detection efficiency of existing detection methods

Method used

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Embodiment Construction

[0031] In the following description, for the purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It will be apparent, however, that the embodiments may be practiced without these specific details.

[0032] A method for detecting large inclusions in a slab with low cost and high detection efficiency of the present invention utilizes the principle that once large inclusions exist in the surface area of ​​the slab, cracks will appear when the quenching strength is sufficiently large. Whether there are cracks in the slab after surface quenching is used to determine and analyze whether there are large inclusions in the slab to be tested.

[0033] Various embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0034] Figure 1 to Figure 4 An overall description of the method for the detection of inclusions in slabs is given. Specifica...

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Abstract

The invention provides a method for detecting inclusions in a slab, which belongs to the technical field of continuous casting. The method comprises selecting a fixed-length slab to be inspected for inclusions as the slab to be inspected, and performing surface quenching on the slab to be inspected before grain boundary embrittlement. Cool; cut the slab to be tested into a slab cross-section of a set thickness along the drawing direction; perform low-power pickling on the cross-section of the slab cross-section; observe the quenched area of ​​the slab cross-section to see if cracks occur; If cracks are formed in the quenching area of ​​the transverse sample of the slab, it is determined that there are large inclusions in the slab to be detected; the present invention realizes continuous analysis and detection of the inclusions on the entire fixed-length slab, thereby improving the accuracy of the detection results. The technical effect of improving the performance and reducing the cost of detection.

Description

technical field [0001] The invention relates to the technical field of continuous casting, in particular to a method for detecting inclusions in a slab. Background technique [0002] Oxide inclusions affect the quality of steel, and the quantity, shape, size and distribution position of oxide inclusions have different effects on steel quality; only a comprehensive and accurate analysis of inclusions in steel can determine inclusions The source, formation mechanism and distribution law of the material, and then improve the steelmaking process. Among them, the inclusions with a diameter larger than 50 μm become large inclusions. Although the large inclusions account for only 1% of the total inclusions, they do great harm to the quality of the steel. [0003] The detection and analysis of steel inclusions is completed by combining the detection methods of inclusions such as microscopy, small sample electrolysis, and large sample electrolysis with X-ray projection and sulfur pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/95G01N23/227G01N23/2273G01N23/2202G01N23/2206G01N1/28G01N1/42G01N1/32
CPCG01N21/95G01N23/227G01N23/2273G01N23/2202G01N23/2206G01N1/286G01N1/42G01N1/32G01N2001/2873
Inventor 钱亮韩占光姜敏谢长川周干水
Owner CONTINUOUS CASTING TECH ENG OF CHINA
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