Method for detecting and analyzing small-size non-metallic inclusions in steel by using scanning electron microscope

A technology of non-metallic inclusions and scanning electron microscopy, which is applied in the fields of material analysis using radiation, material analysis using radiation diffraction, material analysis using wave/particle radiation, etc. It can solve the problems of poor stability and low accuracy of quantitative analysis, etc. Accurate and qualitative, easy to operate, large analysis area

Pending Publication Date: 2022-01-07
SHANGHAI MEISHAN IRON & STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to provide a method for detecting and analyzing small-sized non-metallic inclusions in steel with a scanning electron microscope, which mainly solves the technical problems of low quantitative analysis accuracy and poor stability of small-sized non-metallic inclusions in steel in the prior art

Method used

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  • Method for detecting and analyzing small-size non-metallic inclusions in steel by using scanning electron microscope
  • Method for detecting and analyzing small-size non-metallic inclusions in steel by using scanning electron microscope
  • Method for detecting and analyzing small-size non-metallic inclusions in steel by using scanning electron microscope

Examples

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Embodiment 1

[0032] Example 1, detection and analysis of inclusions in a continuous casting slab with a thickness of 200 mm and a designation of B500CL.

[0033] A method for detecting and analyzing small-sized non-metallic inclusions in steel with a scanning electron microscope, comprising the following steps:

[0034] 1) Prepare a metallographic sample, inlay the surface of the sample to be tested with a thermal mosaic machine; polish, polish, and clean the inlaid sample; paste aluminum foil paper on the edge of the sample that is not to be analyzed to obtain a metallographic sample; Specimens are mounted, ground, polished, cleaned, including,

[0035] 1.1) Select the representative position of the continuous casting slab, cut out a sample of 15mm×15mm, and inlay the surface with a hot mosaic machine through the hot mosaic method; grind and polish the mosaic sample, and grind it on the grinding and polishing machine The particle size of sandpaper is selected from 180 mesh to 1200 mesh i...

Embodiment 2

[0048] Example 2, detection and analysis of inclusions in a B550CL hot-rolled plate with a thickness of 2.5 mm.

[0049] A method for detecting and analyzing small-sized non-metallic inclusions in steel with a scanning electron microscope, comprising the following steps:

[0050] 1) Prepare a metallographic sample, inlay the surface of the sample to be tested with a thermal mosaic machine; polish, polish, and clean the inlaid sample; paste aluminum foil paper on the edge of the sample that is not to be analyzed to obtain a metallographic sample; Specimens are mounted, ground, polished, cleaned, including,

[0051] 1.1) Select the representative position of the hot-rolled plate, cut the sample of 20mm×20mm, take four pieces of its longitudinal section 2.5mm×20mm, arrange them together, and use the hot-mounting machine to inlay them by the hot-mounting method; The sample is polished and polished, and the particle size of the sandpaper is selected from 180 mesh to 1200 mesh in t...

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Abstract

The invention discloses a method for detecting and analyzing small-size non-metallic inclusions in steel by using a scanning electron microscope, and mainly solves the technical problems of low quantitative analysis precision and poor stability of the small-size non-metallic inclusions in the steel in the prior art. According to the technical scheme, the method for detecting and analyzing the small-size non-metallic inclusions in the steel by using the scanning electron microscope comprises the following steps: (1) preparing a metallographic sample, and embedding the surface of the sample to be detected by using a hot embedding machine; grinding, polishing and cleaning the embedded sample and pasting aluminum-foil paper on a non-analysis area on the edge of the sample to obtain a metallographic sample; 2) regulating and controlling scanning electron microscope and energy spectrum detection parameters; (3) detecting inclusions; and 4) analyzing the inclusions, setting a classification standard of the inclusions, and analyzing a detection result by utilizing a computer inclusion analysis program to obtain the quantity, size, shape and component information of the inclusions. The method is easy and convenient to operate, high in efficiency and high in precision of qualitative and quantitative analysis of the small-size non-metallic inclusions in the steel.

Description

technical field [0001] The invention relates to a method for analyzing non-metallic inclusions in iron and steel materials, in particular to a method for detecting and analyzing small-sized non-metallic inclusions in steel with a scanning electron microscope, and belongs to the technical field of analysis and detection of iron and steel materials. Background technique [0002] With the development of modern refining technology, the cleanliness of steel has been greatly improved. The understanding of non-metallic inclusions in steel has also begun to be regarded as a hazard that will reduce the plasticity, toughness and fatigue properties of steel, and make the cold and hot processing performance of steel harmful. Substances, and the transformation is to affect the properties of steel products by controlling non-metallic inclusions in steel. Therefore, it is of great significance to study the quantity, shape, size and distribution of non-metallic inclusions in steel, and to c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/04G01N1/28G01N1/34G01N23/20G01N23/2273
CPCG01N23/04G01N1/28G01N1/34G01N23/20G01N23/2273
Inventor 赵楠刘学伟孙明军
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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