CN105436452A - Method for detecting continuously-cast small-square-billet liquid core - Google Patents
Method for detecting continuously-cast small-square-billet liquid core Download PDFInfo
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- CN105436452A CN105436452A CN201510812079.2A CN201510812079A CN105436452A CN 105436452 A CN105436452 A CN 105436452A CN 201510812079 A CN201510812079 A CN 201510812079A CN 105436452 A CN105436452 A CN 105436452A
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- liquid core
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
- B22D11/18—Controlling or regulating processes or operations for pouring
- B22D11/181—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level
- B22D11/187—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level by using X-rays or nuclear radiation
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
- Continuous Casting (AREA)
Abstract
The invention provides a method for detecting a continuously-cast small-square-billet liquid core, and belongs to the technical field of detection of steel-making continuously-cast billets. The method is used for detecting the position of the continuously-cast small-square-billet liquid core. According to the technical scheme, a lead tracer agent is added into a tundish in the last pouring phase, after being pulled out, a tail billet is subjected to multiple times of sampling at the same time interval, and each sample is sawn and polished; then the samples are scanned through an X-ray scanner, and scanning results are recorded; according to the scanning results, the samples are arranged according to a sample number sequence, the sample with the solidified tail end liquid core is found out, and the length of the liquid core is obtained according to corresponding the number of the found sample. The method of determining the position of the liquid core through the tracer agent is pioneered in production of continuously-cast small square billets, the position of the continuously-cast small-square-billet liquid core can be accurately determined, the effect of tail end electromagnetic stirring is given to the maximum play, and therefore the quality of drawn wire rods is improved, and user requirements are met. By means of the method, the problems which are not solved for a long time in production of the continuously-cast small square billets are solved, and the method has remarkable economic benefits and high application and popularization value.
Description
Technical field
The present invention relates to a kind of method detecting continuous cast billet liquid core, belong to steel-making continuous casting base detection technique field.
Background technology
High-level drawing wires is important raw and processed materials indispensable in the national economic development, is mainly used in the industries such as building, vehicle, bridge.Above-mentioned wire rod forms primarily of small billet drawing and rolling, has the advantages that carbon content is higher.Along with the fast development of production and improving constantly of product quality, the quality and performance of user to wire rod is had higher requirement.Often there is the internal soundness such as center segregation and center porosity problem in current high-carbon wire rod small billet, has had a strong impact on the drawing property of wire rod in process of production, makes wire quality can not meet the requirement of client.In normal production process, the control of small billet center segregation can improve by adding electromagnetic agitation at strand liquid core terminal position, and therefore, the determination of liquid core position is the prerequisite improving segregation.At present, due to the technical characterstic that continuous casting is produced, liquid core position is difficult to determine, usually adopts the method for simulation, but there is certain error.Up to now, how to determine that the problem of small billet liquid core position is never effectively solved in process of production, become the difficult problem that puzzlement improves the drawing property of wire rod, urgent need enterprise and technical staff solve.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of method detecting continuous cast billet liquid core, and this detection method can determine the liquid core position of small billet exactly, makes the effect of end electromagnetic agitation obtain maximum performance, thus improves continuous casting billet quality further.
The technical scheme solved the problems of the technologies described above is:
Detect a method for continuous cast billet liquid core, it adopts following steps to carry out:
A. adopt metal as tracer, before cast stops watering latter stage, bonding jumper is melted, and keep molten condition;
B. the cast latter stage before Zhong Bao stops watering, pulling rate is progressively reduced to 0.6-0.8m/min, utilize self-control water conservancy diversion kettle, by in disposable for the spike molten metal crystallizer added, after having poured into, continue pour steel, keep pulling rate 0.6-0.8m/min, draw 5-7min to stop watering, enter after stopping watering and draw tail mold formula;
C., after tail base being pulled out, tail base is sampled, gets one piece of sample every 0.5-0.7m, and be numbered in order;
D. every block sample is processed, with sawing machine, sawing is carried out on strand both sides, retain the strand of strand middle part, after sawing, to scrape process with the working face of grinding machine to casting blank sample, the sample X-ray scanners after scraping is scanned, and writing scan result;
E. the scanning result of every block sample is arranged by specimen coding order, find out the sample at solidification end liquid core place, and go out liquid core length by its numbering correspondence.
The method of above-mentioned detection continuous cast billet liquid core, described tracer is leads, casting latter stage stop watering before 1 hour by leads melt, keep plumbous liquid temp more than 350 DEG C, prevent condensation.
The method of above-mentioned detection continuous cast billet liquid core, the pulling rate that latter stage poured into a mould by described middle bag is reduced to 0.7m/min, and the time adding plumbous liquid is 1-2min, and after having poured into, maintenance pulling rate is 0.7m/min.
The method of above-mentioned detection continuous cast billet liquid core, sawing is carried out in strand both sides by described sawing machine, retains the strand of strand middle part 25-30mm.
The invention has the beneficial effects as follows:
The present invention adds plumbous tracer at Zhong Bao in cast latter stage, the sampling of same intervals is carried out repeatedly after the pull-out of tail base, every block sample is carried out sawing, scraped, then scan with X-ray scanners, and writing scan result, arrange by specimen coding order according to scanning result, find out the sample at solidification end liquid core place, and go out liquid core length by its numbering correspondence.
The present invention utilizes the method for tracer determination liquid core position to be initiating during continuous cast billet is produced, the error of this method is significantly smaller than analogy method, accurately can determine the liquid core position of continuous cast billet, the effect of end electromagnetic agitation is made to obtain maximum performance, thus improve the quality of continuous cast billet further, and then improve the quality of drawing wires, meet the needs of user.
The invention solves continuous cast billet and produce the medium-term and long-term difficult problem not having to solve, having made contribution for improving continuous cast billet quality, there is significant economic benefit, have popularizing value admirably.
Accompanying drawing explanation
Fig. 1 is tail base sample sawing schematic diagram.
In figure, mark is as follows: sample 1, reservation position 2, throwing direction 3.
Detailed description of the invention
The step that the present invention takes is as follows:
1, adopt metal Pb to make tracer, 40kg leads was melted in 1 hour before casting stops watering latter stage, and be warming up to more than 350 DEG C, prevent condensation.
2, in middle bag cast latter stage (before stopping watering), pulling rate is progressively reduced to about 0.7m/min, utilizes the plumbous kettle water conservancy diversion of self-control, liquid is disposable adds in crystallizer by plumbous for 40kg, and the joining day is 1-2min; After having poured into, continue pour steel, keep pulling rate 0.7m/min, draw 5-7min to stop watering; Enter after stopping watering and draw tail mold formula.
3, after tail base being pulled out, tail base is sampled, gets one piece of sample every 0.5-0.7m, and be numbered in order.
4, every block sample is processed, with sawing machine, sawing is carried out on strand both sides, retain the strand of strand middle part 25mm; After sawing, to scrape process with the working face of grinding machine to casting blank sample: the sample X-ray scanners after scraping is scanned, and writing scan result.
5, the scanning result of every block sample is arranged by specimen coding order, find out the sample at solidification end liquid core place, and go out liquid core length by its numbering correspondence.
Show in figure, one embodiment of the present of invention are continuous cast billets of 165*165, and sample 1 is along strand both sides, throwing direction 3 difference sawing 70mm, and the middle position 2 that retains retains 25mm.
Claims (4)
1. detect a method for continuous cast billet liquid core, it is characterized in that: it adopts following steps to carry out:
A. adopt metal as tracer, before cast stops watering latter stage, bonding jumper is melted, and keep molten condition;
B. the cast latter stage before Zhong Bao stops watering, pulling rate is progressively reduced to 0.6-0.8m/min, utilize self-control water conservancy diversion kettle, by in disposable for the spike molten metal crystallizer added, after having poured into, continue pour steel, keep pulling rate 0.6-0.8m/min, draw 5-7min to stop watering, enter after stopping watering and draw tail mold formula;
C., after tail base being pulled out, tail base is sampled, gets one piece of sample every 0.5-0.7m, and be numbered in order;
D. every block sample is processed, with sawing machine, sawing is carried out on strand both sides, retain the strand of strand middle part, after sawing, to scrape process with the working face of grinding machine to casting blank sample, the sample X-ray scanners after scraping is scanned, and writing scan result;
E. the scanning result of every block sample is arranged by specimen coding order, find out the sample at solidification end liquid core place, and go out liquid core length by its numbering correspondence.
2. a kind of method detecting continuous cast billet liquid core according to claim 1, is characterized in that: described tracer is leads, casting latter stage stop watering before 1 hour by leads melt, keep plumbous liquid temp more than 350 DEG C, prevent condensation.
3. a kind of method detecting continuous cast billet liquid core according to claim 1, is characterized in that: the pulling rate that latter stage poured into a mould by described middle bag is reduced to 0.7m/min, and the time adding plumbous liquid is 1-2min, and after having poured into, maintenance pulling rate is 0.7m/min.
4. a kind of method detecting continuous cast billet liquid core according to claim 1, is characterized in that: sawing is carried out in strand both sides by described sawing machine, retains the strand of strand middle part 25-30mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510812079.2A CN105436452A (en) | 2015-11-22 | 2015-11-22 | Method for detecting continuously-cast small-square-billet liquid core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510812079.2A CN105436452A (en) | 2015-11-22 | 2015-11-22 | Method for detecting continuously-cast small-square-billet liquid core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105436452A true CN105436452A (en) | 2016-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510812079.2A Pending CN105436452A (en) | 2015-11-22 | 2015-11-22 | Method for detecting continuously-cast small-square-billet liquid core |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112207246A (en) * | 2020-10-23 | 2021-01-12 | 北京科技大学 | Method for measuring solidification end point of square billet |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1503864A (en) * | 1975-05-30 | 1978-03-15 | Concast Ag | Level gauge |
| JPS63203261A (en) * | 1987-02-18 | 1988-08-23 | Hitachi Ltd | Continuous casting machine for sheet |
| CN1909995A (en) * | 2004-01-20 | 2007-02-07 | Sms迪马格股份公司 | Method and device for determining the position of the solidification point in a casting billet during continuous casting of liquid metals, in particular liquid steel work materials |
| CN101367115A (en) * | 2008-08-22 | 2009-02-18 | 武汉钢铁(集团)公司 | Casting blank liquid core length measuring method |
| CN102205401A (en) * | 2011-05-19 | 2011-10-05 | 田陆 | Sensor positioning device and continuous casting liquid core position detecting system with same |
-
2015
- 2015-11-22 CN CN201510812079.2A patent/CN105436452A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1503864A (en) * | 1975-05-30 | 1978-03-15 | Concast Ag | Level gauge |
| JPS63203261A (en) * | 1987-02-18 | 1988-08-23 | Hitachi Ltd | Continuous casting machine for sheet |
| CN1909995A (en) * | 2004-01-20 | 2007-02-07 | Sms迪马格股份公司 | Method and device for determining the position of the solidification point in a casting billet during continuous casting of liquid metals, in particular liquid steel work materials |
| CN101367115A (en) * | 2008-08-22 | 2009-02-18 | 武汉钢铁(集团)公司 | Casting blank liquid core length measuring method |
| CN102205401A (en) * | 2011-05-19 | 2011-10-05 | 田陆 | Sensor positioning device and continuous casting liquid core position detecting system with same |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112207246A (en) * | 2020-10-23 | 2021-01-12 | 北京科技大学 | Method for measuring solidification end point of square billet |
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Application publication date: 20160330 |
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