CN114088754A - Method for researching composition of attachment matter phase on inner wall of submerged nozzle for casting molten steel with different contents of rare earth - Google Patents
Method for researching composition of attachment matter phase on inner wall of submerged nozzle for casting molten steel with different contents of rare earth Download PDFInfo
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- CN114088754A CN114088754A CN202111219019.1A CN202111219019A CN114088754A CN 114088754 A CN114088754 A CN 114088754A CN 202111219019 A CN202111219019 A CN 202111219019A CN 114088754 A CN114088754 A CN 114088754A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/20—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by using diffraction of the radiation by the materials, e.g. for investigating crystal structure; by using scattering of the radiation by the materials, e.g. for investigating non-crystalline materials; by using reflection of the radiation by the materials
- G01N23/207—Diffractometry using detectors, e.g. using a probe in a central position and one or more displaceable detectors in circumferential positions
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/20—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by using diffraction of the radiation by the materials, e.g. for investigating crystal structure; by using scattering of the radiation by the materials, e.g. for investigating non-crystalline materials; by using reflection of the radiation by the materials
- G01N23/20008—Constructional details of analysers, e.g. characterised by X-ray source, detector or optical system; Accessories therefor; Preparing specimens therefor
- G01N23/2005—Preparation of powder samples therefor
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Abstract
The invention discloses a method for researching the composition of attachment matter phases on the inner wall of an immersion type water gap for casting molten rare earth steel with different contents, which is characterized by comprising the following steps of: in the casting process of the rare earth steel with different contents, after the casting is finished, sampling a submerged nozzle for casting; scraping the attachments on the inner wall of the submerged nozzle, grinding the attachments to the granularity of 300 meshes, placing the ground sample in a groove on a sample plate, compacting and flattening the sample by using a glass sheet, and performing phase detection; and (3) carrying out data processing analysis on the detection result, and analyzing the composition and the content of the matter phase attached to the inner wall of the submerged nozzle for casting the rare earth steel with different contents. The method disclosed by the invention can be used for deeply and comprehensively analyzing the composition of the attachment substance phase on the inner wall of the submerged nozzle for casting the rare earth molten steel with different contents on the basis of determining the actual rare earth content in the cast molten steel, thereby analyzing the influence on the service performance of the submerged nozzle. The research data is more practical, and the research result is more reliable. Has important guiding function for the continuous casting production of the rare earth steel.
Description
Technical Field
The invention relates to the technical field of continuous casting, in particular to a method for researching composition of attachment substance on the inner wall of an immersion type water gap for casting molten rare earth steel with different contents.
Background
The continuous casting submerged nozzle is located between the tundish and the mold, and is an important functional refractory material for protecting the casting process during the molten steel casting process. Because the activity of the rare earth metal is strong, in the process of continuous casting of the rare earth steel, rare earth and oxides thereof in the steel inevitably react with the Al2O3-C submerged nozzle, so that the phase of attachments on the inner wall of the submerged nozzle can be changed, and the service performance of the submerged nozzle is influenced. If the service performance of the submerged nozzle is deteriorated due to the change of the phase of attachments on the inner wall of the submerged nozzle, the normal casting of the rare earth steel is influenced, the castability of the rare earth steel is poor, and the stable and smooth running of the continuous casting process of the rare earth steel and the quality of a casting blank are seriously influenced.
In the rare earth steel casting process, the physical phase composition of attachments on the inner wall of the submerged nozzle for casting the rare earth steel with different contents is accurately researched, the service performance of the submerged nozzle can be judged, an important guiding function is provided for continuous casting of the rare earth steel, the method has important significance for the stable and smooth continuous casting process of the rare earth steel and the quality of casting blanks, and is an important measure for ensuring the continuous casting castability of the rare earth steel, improving the quality of the casting blanks and reducing the production cost. The problem to be solved is that in the casting process of rare earth steel with different contents, the matter phase attached to the inner wall of the submerged nozzle is formed. And detecting the phase of the attachment on the inner wall of the submerged nozzle in the casting process of the rare earth steel with different contents by using an X-ray diffractometer, and carrying out data processing analysis on the detection result by using Origin software to research the phase composition of the attachment on the inner wall of the submerged nozzle for casting the rare earth steel with different contents.
At present, the research on the composition of matter phase of attachments on the inner wall of an immersion type water gap for casting molten rare earth steel with different contents does not exist in China, the rare earth steel researched by the research only indicates the addition amount of rare earth, and the content of the rare earth in the cast molten steel is unknown.
Disclosure of Invention
The invention aims to provide a method for researching the composition of an attachment matter phase on the inner wall of an immersion nozzle for casting molten rare earth steel with different contents, which can analyze the composition of the attachment matter phase on the inner wall of the immersion nozzle for casting the molten rare earth steel with different contents more deeply and comprehensively on the basis of determining the actual content of rare earth in the cast molten steel, thereby analyzing the influence on the service performance of the immersion nozzle. The research data is more practical, and the research result is more reliable. Has important guiding function for the continuous casting production of the rare earth steel.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention relates to a method for researching the composition of matter phases attached to the inner wall of an immersion type water gap for casting molten rare earth steel with different contents, wherein in the casting process of the rare earth steel with different contents, the immersion type water gap for casting is sampled after the casting is finished; scraping the attachments on the inner wall of the submerged nozzle, grinding the attachments to the granularity of 300 meshes, placing the ground sample in a groove on a sample plate, compacting and flattening the sample by using a glass sheet, and performing phase detection; and (3) carrying out data processing analysis on the detection result, and analyzing the composition and the content of the matter phase attached to the inner wall of the submerged nozzle for casting the rare earth steel with different contents.
Further, phase detection is performed on the product by using an X-ray diffractometer.
And further, data processing and analysis are carried out on the detection result by utilizing Origin software, and the composition and the content of the matter phase attached to the inner wall of the submerged nozzle for casting the rare earth steel with different contents are analyzed.
Compared with the prior art, the invention has the beneficial technical effects that:
the method is used for deeply and comprehensively analyzing the composition of the attachment substance phase on the inner wall of the submerged nozzle for casting the rare earth molten steel with different contents on the basis of determining the actual rare earth content in the cast molten steel, so that research data are more practical, and the research result is more reliable.
Drawings
The invention is further illustrated in the following description with reference to the drawings.
FIG. 1 shows the inner wall deposit of the submerged entry nozzle in example 1;
FIG. 2 shows the inner wall deposit of the submerged entry nozzle in example 2.
Detailed Description
A method for researching the composition of the attachment matter phase on the inner wall of the submerged nozzle for casting molten rare-earth steel with different contents includes taking the submerged nozzle samples for casting rare-earth steel with different contents, scraping the attachment matter on the inner wall of the nozzle, and grinding
The granularity reaches 300 meshes, the ground sample is placed in a groove on a sample plate, a glass sheet is used for compacting and flattening the sample, and an X-ray diffractometer is used for carrying out phase detection on the sample. And (4) carrying out data processing on the detection result by using Origin software, and analyzing the composition and content of the detection result.
The present invention will be further illustrated with reference to the following examples.
Example 1: HRB400 rare earth steel production, the average content of rare earth in casting molten steel is 30ppm, and the rare earth is taken
Immersing a water gap sample after the steel is cast, scraping the attachments on the inner wall of the water gap, grinding the attachment to the granularity of 300 meshes, placing the ground sample in a groove on a sample plate, compacting and flattening the sample by using a glass sheet, and performing phase detection on the sample by using an X-ray diffractometer. And (4) carrying out data processing on the detection result by using Origin software, and analyzing the composition and content of the detection result. The results of the analysis are shown in FIG. 1:
as shown in figure 1, after the rare earth steel is cast, the attachments on the inner wall of the submerged nozzle are mainly calcium aluminosilicate, rare earth aluminate and magnesium aluminate spinel.
Example 2: a572Gr65 rare earth steel production, the average rare earth content of the casting molten steel is 50ppm, take
After casting the rare earth steel, immersing the sample in the nozzle, scraping the attachments on the inner wall of the nozzle, grinding to make the particle size reach 300 meshes, placing the ground sample in the groove on the sample plate, compacting and flattening the sample by using a glass sheet, and performing phase detection on the sample by using an X-ray diffractometer. And (4) carrying out data processing on the detection result by using Origin software, and analyzing the composition and content of the detection result. The results of the analysis are shown in FIG. 2 below:
as shown in FIG. 2, after the rare earth steel is cast, the attachments on the inner wall of the submerged nozzle are mainly rare earth aluminate and calcium aluminosilicate, and a small amount of magnesium aluminate spinel and calcium iron oxide.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (3)
1. A method for researching the composition of a physical phase of an attachment on the inner wall of an immersion nozzle for casting molten rare earth steel with different contents is characterized in that: in the casting process of the rare earth steel with different contents, after the casting is finished, sampling a submerged nozzle for casting; scraping the attachments on the inner wall of the submerged nozzle, grinding the attachments to the granularity of 300 meshes, placing the ground sample in a groove on a sample plate, compacting and flattening the sample by using a glass sheet, and performing phase detection; and (3) carrying out data processing analysis on the detection result, and analyzing the composition and the content of the matter phase attached to the inner wall of the submerged nozzle for casting the rare earth steel with different contents.
2. The method for researching the composition of the attachment substance phase on the inner wall of the submerged nozzle for casting the molten steel with different contents of rare earth according to claim 1, is characterized in that: and carrying out phase detection on the sample by using an X-ray diffractometer.
3. The method for researching the composition of the attachment substance phase on the inner wall of the submerged nozzle for casting the molten steel with different contents of rare earth according to claim 1, is characterized in that: and (4) carrying out data processing analysis on the detection result by using Origin software, and analyzing the composition and the content of the matter phase attached to the inner wall of the submerged nozzle for casting the rare earth steel with different contents.
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| CN202111219019.1A CN114088754A (en) | 2021-10-20 | 2021-10-20 | Method for researching composition of attachment matter phase on inner wall of submerged nozzle for casting molten steel with different contents of rare earth |
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| CN202111219019.1A CN114088754A (en) | 2021-10-20 | 2021-10-20 | Method for researching composition of attachment matter phase on inner wall of submerged nozzle for casting molten steel with different contents of rare earth |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008264802A (en) * | 2007-04-17 | 2008-11-06 | Nippon Steel Corp | Method of continuous casting |
| JP2009274079A (en) * | 2008-05-12 | 2009-11-26 | Nippon Steel Corp | Method for preventing immersion nozzle from being stuffed |
| CN104772452A (en) * | 2015-03-12 | 2015-07-15 | 东北大学 | Method for preventing steel billet continuous casting nozzle from blocking |
| CN111906266A (en) * | 2020-08-21 | 2020-11-10 | 北京科技大学 | Method for inhibiting rare earth molten steel pouring nozzle from being blocked by pulse current |
-
2021
- 2021-10-20 CN CN202111219019.1A patent/CN114088754A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008264802A (en) * | 2007-04-17 | 2008-11-06 | Nippon Steel Corp | Method of continuous casting |
| JP2009274079A (en) * | 2008-05-12 | 2009-11-26 | Nippon Steel Corp | Method for preventing immersion nozzle from being stuffed |
| CN104772452A (en) * | 2015-03-12 | 2015-07-15 | 东北大学 | Method for preventing steel billet continuous casting nozzle from blocking |
| CN111906266A (en) * | 2020-08-21 | 2020-11-10 | 北京科技大学 | Method for inhibiting rare earth molten steel pouring nozzle from being blocked by pulse current |
Non-Patent Citations (2)
| Title |
|---|
| 姚永宽, 朱明伟, 王德永, 刘承军, 姜茂发: "中间包喂稀土水口结瘤机理的研究", 稀土, no. 05, pages 17 - 19 * |
| 孙彪;: "圆坯含硫钢结瘤原因分析及预防措施", 安徽冶金, no. 02, pages 24 - 28 * |
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