CN113834921A - Method for effectively measuring average value of rare earth content of rare earth steel casting blank - Google Patents
Method for effectively measuring average value of rare earth content of rare earth steel casting blank Download PDFInfo
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- CN113834921A CN113834921A CN202110938759.4A CN202110938759A CN113834921A CN 113834921 A CN113834921 A CN 113834921A CN 202110938759 A CN202110938759 A CN 202110938759A CN 113834921 A CN113834921 A CN 113834921A
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- 229910052761 rare earth metal Inorganic materials 0.000 title claims abstract description 109
- 150000002910 rare earth metals Chemical class 0.000 title claims abstract description 105
- 238000005266 casting Methods 0.000 title claims abstract description 59
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 49
- 239000010959 steel Substances 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000004458 analytical method Methods 0.000 claims abstract description 8
- 238000009749 continuous casting Methods 0.000 claims abstract description 5
- 238000007405 data analysis Methods 0.000 claims abstract description 4
- 238000010791 quenching Methods 0.000 claims abstract description 4
- 230000000171 quenching effect Effects 0.000 claims abstract description 4
- 238000005204 segregation Methods 0.000 claims abstract description 4
- 238000007670 refining Methods 0.000 claims description 5
- 238000012360 testing method Methods 0.000 description 6
- 238000009776 industrial production Methods 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000010200 validation analysis Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/20—Metals
- G01N33/202—Constituents thereof
- G01N33/2022—Non-metallic constituents
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- Chemical & Material Sciences (AREA)
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- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
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- Continuous Casting (AREA)
Abstract
The invention discloses a method for effectively measuring the average value of rare earth content of a rare earth steel casting blank, data analysis and theoretical analysis are carried out on the measured values of a large amount of rare earth of a rare earth continuous casting blank, and the analysis result shows that: the content of the rare earth in different positions in the casting blank changes obviously, but the content of the rare earth on the upper surface and the lower surface of the casting blank is almost not different, and the content of the rare earth on the upper surface and the lower surface is not visibly different from the average value of each measuring point of the casting blank; the main reason is that rare earth is slowly diffused in steel, but rare earth elements cannot be diffused in a quenching layer on the surface of a casting blank, and the segregation index is approximate to 1, so the average value of the rare earth content of the casting blank is represented by the value; namely, the measured value of the rare earth near the surface of the corresponding rare earth steel casting blank is used for replacing the measured value when the average value of the rare earth content of the rare earth steel casting blank is measured. When the method is used for measuring the average value of the rare earth content of the rare earth steel casting blank, the measured value of the rare earth on the near surface of the corresponding rare earth steel casting blank can be used for replacing (the more data points are indicated, the more accurate the data points are), so that a great amount of time and cost are saved.
Description
Technical Field
The invention relates to the technical field of steel smelting, in particular to a method for effectively measuring the average value of rare earth content of a rare earth steel casting blank.
Background
The application and social benefits of the rare earth steel are based on the industrial production of the rare earth steel, and along with the development of the industrial production of the rare earth steel, the rare earth detection of the rare earth steel is increasingly a restrictive link, namely time, labor and cost are wasted. The rare earth steel casting blank is used as the end point of continuous casting and the initial point of product rolling, and the detection of the rare earth steel casting blank becomes the important point which cannot be avoided. At present, the rare earth content of the rare earth steel casting blank is detected by sampling different positions of the casting blank and then calculating the average value. However, such a method consumes a lot of manpower, material resources, and time. How to effectively, quickly and accurately measure the average value of the rare earth content of the rare earth steel casting blank becomes a technical difficulty. Effectively solving the problems, the method can help the industrial production of the rare earth steel and save a large amount of financial resources. The present invention seeks to solve or ameliorate the above problems.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a method for effectively measuring the average value of the rare earth content of a rare earth steel casting blank, which can replace the near-surface rare earth measured value of the corresponding rare earth steel casting blank when measuring the average value of the rare earth content of the rare earth steel casting blank (the more the near-surface data points are, the more the near-surface data points are accurate), thereby saving a large amount of time and cost.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention discloses a method for effectively measuring the average value of rare earth content of a rare earth steel casting blank, which carries out data analysis and theoretical analysis on a large number of rare earth measured values of a rare earth continuous casting blank, and the analysis result shows that: the content of the rare earth in different positions in the casting blank changes obviously, but the content of the rare earth on the upper surface and the lower surface of the casting blank is almost not different, and the content of the rare earth on the upper surface and the lower surface is not visibly different from the average value of each measuring point of the casting blank; the main reason is that rare earth is slowly diffused in steel, but rare earth elements cannot be diffused in a quenching layer on the surface of a casting blank, and the segregation index is approximate to 1, so the average value of the rare earth content of the casting blank is represented by the value; namely, the measured value of the rare earth near the surface of the corresponding rare earth steel casting blank is used for replacing the measured value when the average value of the rare earth content of the rare earth steel casting blank is measured.
Further, the rare earth steel slab includes a plurality of types of slabs.
Further, the plurality of types of casting blanks include square blanks, slab blanks, and round blanks.
Further, the rare earth steel refers to rare earth added before and after the refining station or the refining station.
Compared with the prior art, the invention has the beneficial technical effects that:
when the average value of the rare earth content of the rare earth steel casting blank is measured, the measured value of the rare earth on the near surface of the corresponding rare earth steel casting blank can be used for replacing (the more data points are indicated, the more accurate the result is), the result is ensured to have certain accuracy, and meanwhile, a large amount of time and cost are saved.
Drawings
The invention is further illustrated in the following description with reference to the drawings.
FIG. 1 is a schematic view of the embodiment 1 showing the sampling of the middle part of the hole drilled in the position less than or equal to 10mm from the upper surface.
Detailed Description
The invention aims to provide a method for effectively measuring the average value of the rare earth content of a rare earth steel casting blank, which comprises the following steps:
firstly, data analysis and theoretical analysis are carried out on a large number of rare earth measured values of the rare earth continuous casting billet, and the analysis result shows that: the content of the rare earth in different positions in the casting blank is obviously changed, however, the content of the rare earth on the upper surface and the lower surface of the casting blank is almost not different, and the content of the rare earth on the upper surface and the lower surface of the casting blank is not visibly different from the average value of each measuring point of the casting blank. The main reason is that rare earth is slowly diffused in steel, but rare earth elements cannot be diffused in a quenching layer on the surface of a casting blank, the segregation index is approximate to 1, and the average value of the rare earth content of the casting blank can be represented by the value. The above rare earth steel cast slab includes various types of cast slabs (square slab, round slab, etc.). Therefore, when the average value of the rare earth content of the rare earth steel casting blank is measured, the measured value of the rare earth on the near surface of the corresponding rare earth steel casting blank can be used for replacing (the more data points are indicated, the more accurate the data points are), and thus, a great deal of time and cost are saved. The rare earth steel in the invention refers to rare earth added before and after a refining station or a refining station, and mainly ensures the uniformity of the rare earth in steel in molten steel during casting.
Example 1
The average value of the rare earth content of the casting blank of the rare earth steel is generally sampled by about 7 points in the past test of a certain research and development unit of a steel enterprise, and the cost of 5-6 points can be saved by adopting the new method to test the average value of the rare earth of the casting blank. If the total cost of each point of processing, testing and the like is 185 yuan per (Ce), each casting blank can save 185 x 6 to 1110 yuan. The sampling is shown in the schematic diagram 1, and typical test data are shown in the table 1. As can be seen from Table 1, the average value of the rare earth of the casting blank can be effectively and accurately represented by adopting the surface layer of the casting blank to test the content of the rare earth.
Table 1 test validation data
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 (4)
1. A method for effectively measuring the average value of the rare earth content of a rare earth steel casting blank is characterized by comprising the following steps: data analysis and theoretical analysis are carried out on a large number of rare earth measured values of the rare earth continuous casting billet, and the analysis result shows that: the content of the rare earth in different positions in the casting blank changes obviously, but the content of the rare earth on the upper surface and the lower surface of the casting blank is almost not different, and the content of the rare earth on the upper surface and the lower surface is not visibly different from the average value of each measuring point of the casting blank; the main reason is that rare earth is slowly diffused in steel, but rare earth elements cannot be diffused in a quenching layer on the surface of a casting blank, and the segregation index is approximate to 1, so the average value of the rare earth content of the casting blank is represented by the value; namely, the measured value of the rare earth near the surface of the corresponding rare earth steel casting blank is used for replacing the measured value when the average value of the rare earth content of the rare earth steel casting blank is measured.
2. The method for effectively determining the average value of the rare earth content of the rare earth steel casting blank according to claim 1, wherein the method comprises the following steps: the rare earth steel cast slab includes a plurality of types of cast slabs.
3. The method for effectively determining the average value of the rare earth content of the rare earth steel casting blank according to claim 2, wherein the method comprises the following steps: many types of casting blanks include square blanks, slabs, and round blanks.
4. The method for effectively determining the average value of the rare earth content of the rare earth steel casting blank according to claim 1, wherein the method comprises the following steps: the rare earth steel refers to rare earth added before or after a refining station.
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| CN202110938759.4A CN113834921A (en) | 2021-08-16 | 2021-08-16 | Method for effectively measuring average value of rare earth content of rare earth steel casting blank |
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| CN202110938759.4A CN113834921A (en) | 2021-08-16 | 2021-08-16 | Method for effectively measuring average value of rare earth content of rare earth steel casting blank |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116818468A (en) * | 2023-08-24 | 2023-09-29 | 北京科技大学 | Analysis method for evolution process of molten steel modified by adding rare earth |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09178733A (en) * | 1995-12-27 | 1997-07-11 | Kobe Steel Ltd | Method for evaluating continuously casted piece center segregation |
| CN101458175A (en) * | 2007-12-12 | 2009-06-17 | 鞍钢股份有限公司 | Product sampling and detecting method in continuous casting and rolling production process |
| CN111829808A (en) * | 2020-06-15 | 2020-10-27 | 包头钢铁（集团）有限责任公司 | Sampling method for analyzing content of rare earth inclusions in steel casting blank |
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2021
- 2021-08-16 CN CN202110938759.4A patent/CN113834921A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09178733A (en) * | 1995-12-27 | 1997-07-11 | Kobe Steel Ltd | Method for evaluating continuously casted piece center segregation |
| CN101458175A (en) * | 2007-12-12 | 2009-06-17 | 鞍钢股份有限公司 | Product sampling and detecting method in continuous casting and rolling production process |
| CN111829808A (en) * | 2020-06-15 | 2020-10-27 | 包头钢铁（集团）有限责任公司 | Sampling method for analyzing content of rare earth inclusions in steel casting blank |
Non-Patent Citations (2)
| Title |
|---|
| 姚永宽, 颜银标, 陈伟, 陈光, 黄一新, 朱红健, 马军: "不同喂入位置条件下稀土在连铸板坯中分布及其对性能影响", 稀土, no. 04, pages 61 * |
| 郎炜昀等: "不锈钢连铸板坯结晶器钢液喂稀土丝工艺试验研究", 特殊钢, vol. 41, no. 3, 30 June 2020 (2020-06-30), pages 35 - 38 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116818468A (en) * | 2023-08-24 | 2023-09-29 | 北京科技大学 | Analysis method for evolution process of molten steel modified by adding rare earth |
| CN116818468B (en) * | 2023-08-24 | 2023-11-10 | 北京科技大学 | Analysis method for evolution process of molten steel modified by adding rare earth |
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