CN102495133A - Quantitative analysis method for distribution of large impurities in casting blank - Google Patents
Quantitative analysis method for distribution of large impurities in casting blank Download PDFInfo
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- CN102495133A CN102495133A CN2011104129573A CN201110412957A CN102495133A CN 102495133 A CN102495133 A CN 102495133A CN 2011104129573 A CN2011104129573 A CN 2011104129573A CN 201110412957 A CN201110412957 A CN 201110412957A CN 102495133 A CN102495133 A CN 102495133A
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Abstract
The invention relates to a quantitative analysis method for distribution of large impurities in casting blank. Samples are taken along a section of continuous casting blank and then heated to 1,100 to 1,200 DEG C. The casting blank samples after being rolled by a hot rolling mill become equivalently-expanded thin plates, then cooled to normal temperature and flatted, and placed in a water groove of normal temperature. Line-by-line scanning is performed by means of an ultrasonic phased array detector along the direction of the width of the thin plates at an interval of 20mm per line, and sizes, positions and images of the large impurities at different positions are obtained and saved in a data memory. Number and size statistics are made for positions and sizes of all detected defects of the whole length of each plate, the positions and distribution are collected, and finally the number, sizes and distribution conditions of the large impurities at different positions in the test samples are obtained. The quantitative analysis method has the advantages of being capable of obtaining distribution conditions of large impurities not easy to observe and small in probability of occurrence in casting blank and providing important basis for cleanliness control, quality judging, grading and the like of casting blank in the continuous casting field.
Description
Technical field
The invention belongs to continuous casting detection technique field, a kind of method that the medium-and-large-sized snotter of quantitative test strand distributes that is used for particularly is provided, for the strand cleanliness factor control of continuous casting field and quality judging, classification etc. provide important evidence.
Background technology
The especially large-scale snotter of nonmetallic inclusionsin steel is very harmful to steel performance, quality, yet to the way of the medium-and-large-sized snotter quantitative test of steel but seldom.The classic method of the medium-and-large-sized snotter of research steel is mainly metallographic method and electrolytic process.The distribution of large-scale snotter in steel has characteristics such as quantity is few, distribution contingency is big; Metallographic method is because its sample is little, viewing area is limited thereby can not react the regularity of distribution and the truth of large-scale snotter well; Though extracting snotter in the electrolysis sample, electrolytic process carries out quantitative test; But electrolytic process often receives the influence of electrolytic solution bigger; Many snotter sizes, pattern are changed by the electrolytic solution erosion can in electrolytic process; Even disappear (can not extract in acidic electrolysis bath like basic anhydride and obtain), and in elutriation and screening process, snotter is prone to lose or receive outside contamination.
Chinese patent (200810013805.4) discloses the method that a kind of in situ quantitation detects large-scale snotter: the sheet appearance of large shape being got certain-length from the surface to the core; The steel appearance surface treatment glue-line of totally resinizing; The original surface of only the leaving and taking steel glue-line of not resinizing; The electrolysis degree of depth is 0.5 ~ 5mm, and electrolysis finishes the back and collects snotter in the electrolytic solution, and then the downward 5 ~ 10mm of sample is carried out re-electrolysis; Up to selected sample all electrolysis highly successively finish; Every layer of snotter collected, at last every layer of sample of snotter that obtains and electrolysis used microscope, in-situ analyzer and spectral analysis and carry out conventional analysis, obtain the distribution situation of snotter diverse location in strand.The large-scale snotter of this kind method quantitative test is not broken away from the error effect that the defective of electrolytic process own causes equally, and lacks the information of large-scale intuitively snotter distribution in strand.
Summary of the invention
The object of the present invention is to provide a kind of method that the medium-and-large-sized snotter of quantitative test strand distributes that is used for, through the distribution of the less large-scale snotter of probability of occurrence in the method detection strand.Its main thought is that strand is rolled into plate along section; After in tank, utilizing ultrasonic phased array probe to hot rolling then in the thin plate the large-scale snotter of diverse location scan; Phased array probe links to each other with data acquisition equipment (Omniscan) with the phased array imaging appearance through data line; Size, position, quantity through the medium-and-large-sized snotter of image that imager is collected are added up, and obtain the distribution of the large-scale snotter of diverse location in detecting model at last, like Fig. 1.
The present invention is used for the distribution of the medium-and-large-sized snotter of quantitative test steel, and the practical implementation step is following:
1) sampling sample preparation:
To take a sample the L=150 ~ 300mm of sample, strand Width W=50 ~ 80mm along the continuous casting billet section; Strand throwing direction H=100 ~ 200mm; Said sample is heated to 1100 ~ 1200 ℃, behind hot mill rolling, makes the sample broad ways extend 1.5 ~ 3 times; Extend 3 ~ 6 times along its length, thickness becomes original 1/10; Strand appearance after rolling becomes the thin plate that equivalence enlarges, then with sample water-cooled to normal temperature and carry out smooth, subsequent use;
2) scanning:
Thin plate with step 1 after smooth is put into the tank of normal temperature, serves as at interval to carry out line by line scanning along the web width direction with every capable 20mm through the ultrasonic phased array detector, finishes up to the overall length scanning; Obtain size, position and front view, the vertical view side view of the large-scale snotter of diverse location on the said thin plate, be saved in the data-carrier store, subsequent use;
3) analyze and add up:
Extract said database data; All detected defective locations of whole plate overall length, size are carried out quantity and size statistics; Its position and distribution are gathered, obtain quantity, size, the distribution situation of the large-scale snotter of diverse location in the said test sample at last.
The invention has the advantages that the distribution that can reflect large-scale snotter on the strand clear, intuitively, quantitatively, and analytical sample is big, representative strong.
The invention has the beneficial effects as follows: owing to adopt technique scheme; This method can the detection by quantitative strand in the defect distribution that causes of the large-scale snotter of diverse location (size >=200 μ m) or snotter; Can carry out the cleanliness factor evaluation to same strand diverse location or different casting blank, for classification, the quality judging of strand provides foundation.
Description of drawings:
Fig. 1 is a proving installation structural representation of the present invention.
Fig. 2 is the distribution schematic diagram of embodiment 1 medium-and-large-sized snotter at the strand diverse location.
Fig. 3 is the curve synoptic diagram of embodiment 1 zones of different defective F index; (F is area defects number/overall defect number, peak width 20mm).
Fig. 4 is the distribution schematic diagrams of embodiment 2 medium-and-large-sized snotteres at the strand diverse location.
Fig. 5 is the distribution schematic diagrams of embodiment 3 medium-and-large-sized snotteres at the strand diverse location.
Embodiment
further specify below in conjunction with specific embodiment technical scheme of the present invention.
Embodiment 1
Take a sample at the sheet billet continuous casting base, specimen size is L*W*H, wherein L=230mm (strand through thickness); W=65mm (strand Width), H=150mm (strand throwing direction), with sample 1150 ℃ of following hot rollings; Extend 2 times along the strand Width, thickness direction extends 4 times.Specimen size after rolling is 910mm (former slab thickness direction) * 130mm (former strand Width) * 19mm (former strand throwing direction), and to normal temperature, and formation plate shape is removed the thin sheet surface iron scale with the sample water-cooled.Thin plate after smooth is put into the tank of normal temperature; Utilizing the ultrasonic phased array detector is to carry out scanning line by line at interval with 20mm along the web width direction; Finish up to the overall length scanning, real-time data record is kept in the data-carrier store, then large-scale snotter and the defective that causes thereof are added up; Can obtain the distribution of snotter on the plate face, like Fig. 2.Zones of different defect distribution rate can be calculated from statistics, like Fig. 3, therefrom can obtain distribution and the gathering position of large-scale snotter in strand intuitively.
Take a sample at the sheet billet continuous casting base, specimen size is L*W*H, wherein L=150mm (strand through thickness); W=50mm (strand Width), H=100mm (strand throwing direction), with sample 1100 ℃ of following hot rollings; Extend 1.5 times along the strand Width, thickness direction extends 4 times.Specimen size after rolling is 600mm (former slab thickness direction) * 75mm (former strand Width) * 16mm (former strand throwing direction), and to normal temperature, and formation plate shape is removed the thin sheet surface iron scale with the sample water-cooled.Thin plate after smooth is put into the tank of normal temperature; Utilizing the ultrasonic phased array detector is to carry out scanning line by line at interval with 20mm along the web width direction; Finish up to the overall length scanning, real-time data record is kept in the data-carrier store, then large-scale snotter and the defective that causes thereof are added up; Can obtain the distribution of snotter on the plate face, like Fig. 4.
Take a sample at the sheet billet continuous casting base, specimen size is L*W*H, wherein L=300mm (strand through thickness); W=80mm (strand Width), H=200mm (strand throwing direction), with sample 1200 ℃ of following hot rollings; Extend 3 times along the strand Width, thickness direction extends 3 times.Specimen size after rolling is 900mm (former slab thickness direction) * 240mm (former strand Width) * 22mm (former strand throwing direction), and to normal temperature, and formation plate shape is removed the thin sheet surface iron scale with the sample water-cooled.Thin plate after smooth is put into the tank of normal temperature; Utilizing the ultrasonic phased array detector is to carry out scanning line by line at interval with 20mm along the web width direction; Finish up to the overall length scanning, real-time data record is kept in the data-carrier store, then large-scale snotter and the defective that causes thereof are added up; Can obtain the distribution of snotter on the plate face, like Fig. 5.
Claims (1)
1. the method that the medium-and-large-sized snotter of quantitative test strand distributes is characterized in that, specifically may further comprise the steps:
1) sampling sample preparation:
To take a sample the L=150 ~ 300mm of sample, strand Width W=50 ~ 80mm along the continuous casting billet section; Strand throwing direction H=100 ~ 200mm; Said sample is heated to 1100 ~ 1200 ℃, behind hot mill rolling, makes the sample broad ways extend 1.5 ~ 3 times; Extend 3 ~ 6 times along its length, thickness becomes original 1/10; Strand appearance after rolling becomes the thin plate that equivalence enlarges, then with sample water-cooled to normal temperature and carry out smooth, subsequent use;
2) scanning:
Thin plate with step 1 after smooth is put into the tank of normal temperature, serves as at interval to carry out line by line scanning along the web width direction with every capable 20mm through the ultrasonic phased array detector, finishes up to the overall length scanning; Obtain size, position and front view, the vertical view side view of the large-scale snotter of diverse location on the said thin plate, be saved in the data-carrier store, subsequent use;
3) analyze and add up:
Extract said database data; All detected defective locations of whole plate overall length, size are carried out quantity and size statistics; Its position and distribution are gathered, obtain quantity, size, the distribution situation of the large-scale snotter of diverse location in the said test sample at last.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103278424A (en) * | 2013-06-07 | 2013-09-04 | 南京钢铁股份有限公司 | Quantitative evaluation method for continuous casting billet center porosity or center shrinkage cavity |
| CN104730148A (en) * | 2015-03-30 | 2015-06-24 | 北京科技大学 | Metal material inner inclusion three-dimensional reconstruction method based on ultrasonic testing technology |
| WO2016038124A1 (en) * | 2014-09-10 | 2016-03-17 | Sms Group Gmbh | Detecting a material quality of a metallic casting product |
| CN107271557A (en) * | 2017-05-02 | 2017-10-20 | 北京科技大学 | One kind is based on the microscopical steel cleanness evaluation method of ultrasonic scanning |
| CN108072747A (en) * | 2017-11-10 | 2018-05-25 | 中国航发北京航空材料研究院 | A kind of high temperature alloy is mingled with area quantitative evaluation method |
| CN108088904A (en) * | 2017-12-06 | 2018-05-29 | 马鞍山钢铁股份有限公司 | A kind of method of railway wheel ultrasonic listening field trash |
| CN111157620A (en) * | 2020-01-03 | 2020-05-15 | 广东韶钢松山股份有限公司 | Traceability analysis method for large-size inclusions in steel |
| CN111912855A (en) * | 2020-07-30 | 2020-11-10 | 北京首钢股份有限公司 | Method for acquiring rolling evolution process of large inclusions in casting blank |
| CN113059007A (en) * | 2021-02-26 | 2021-07-02 | 武汉钢铁有限公司 | Binding piece surface defect positioning method and device |
| CN113155861A (en) * | 2021-03-03 | 2021-07-23 | 中冶南方连铸技术工程有限责任公司 | Method for detecting casting blank inclusions |
| CN115388956A (en) * | 2022-10-26 | 2022-11-25 | 济南东方结晶器有限公司 | Quality detection method and system based on continuous casting process flow |
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| EP1209464A1 (en) * | 2000-11-27 | 2002-05-29 | General Electric Company | Laser shock peening quality assurance by ultrasonic analysis |
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| CN102095801A (en) * | 2011-01-28 | 2011-06-15 | 首钢总公司 | System and method for quickly and accurately detecting inclusion in casting blank |
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2011
- 2011-12-12 CN CN2011104129573A patent/CN102495133A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| EP1209464A1 (en) * | 2000-11-27 | 2002-05-29 | General Electric Company | Laser shock peening quality assurance by ultrasonic analysis |
| JP4592530B2 (en) * | 2005-08-08 | 2010-12-01 | 株式会社日立製作所 | Ultrasonic flaw detection method and apparatus |
| CN102095801A (en) * | 2011-01-28 | 2011-06-15 | 首钢总公司 | System and method for quickly and accurately detecting inclusion in casting blank |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103278424A (en) * | 2013-06-07 | 2013-09-04 | 南京钢铁股份有限公司 | Quantitative evaluation method for continuous casting billet center porosity or center shrinkage cavity |
| WO2016038124A1 (en) * | 2014-09-10 | 2016-03-17 | Sms Group Gmbh | Detecting a material quality of a metallic casting product |
| CN104730148B (en) * | 2015-03-30 | 2018-10-02 | 北京科技大学 | Metal material inner clamps sundries three-dimensional reconstruction method based on ultrasonic detecting technology |
| CN104730148A (en) * | 2015-03-30 | 2015-06-24 | 北京科技大学 | Metal material inner inclusion three-dimensional reconstruction method based on ultrasonic testing technology |
| CN107271557A (en) * | 2017-05-02 | 2017-10-20 | 北京科技大学 | One kind is based on the microscopical steel cleanness evaluation method of ultrasonic scanning |
| CN108072747A (en) * | 2017-11-10 | 2018-05-25 | 中国航发北京航空材料研究院 | A kind of high temperature alloy is mingled with area quantitative evaluation method |
| CN108072747B (en) * | 2017-11-10 | 2020-05-19 | 中国航发北京航空材料研究院 | Quantitative estimation method for inclusion area of high-temperature alloy |
| CN108088904A (en) * | 2017-12-06 | 2018-05-29 | 马鞍山钢铁股份有限公司 | A kind of method of railway wheel ultrasonic listening field trash |
| CN111157620A (en) * | 2020-01-03 | 2020-05-15 | 广东韶钢松山股份有限公司 | Traceability analysis method for large-size inclusions in steel |
| CN111912855A (en) * | 2020-07-30 | 2020-11-10 | 北京首钢股份有限公司 | Method for acquiring rolling evolution process of large inclusions in casting blank |
| CN113059007A (en) * | 2021-02-26 | 2021-07-02 | 武汉钢铁有限公司 | Binding piece surface defect positioning method and device |
| CN113155861A (en) * | 2021-03-03 | 2021-07-23 | 中冶南方连铸技术工程有限责任公司 | Method for detecting casting blank inclusions |
| CN113155861B (en) * | 2021-03-03 | 2022-07-19 | 中冶南方连铸技术工程有限责任公司 | Method for detecting casting blank inclusions |
| CN115388956A (en) * | 2022-10-26 | 2022-11-25 | 济南东方结晶器有限公司 | Quality detection method and system based on continuous casting process flow |
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Application publication date: 20120613 |