CN104668526A - Method for improving steel ingot casting quality - Google Patents
Method for improving steel ingot casting quality Download PDFInfo
- Publication number
- CN104668526A CN104668526A CN201510109034.9A CN201510109034A CN104668526A CN 104668526 A CN104668526 A CN 104668526A CN 201510109034 A CN201510109034 A CN 201510109034A CN 104668526 A CN104668526 A CN 104668526A
- Authority
- CN
- China
- Prior art keywords
- ingot
- steel
- electrode
- ingot mould
- electrodes
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 51
- 239000010959 steel Substances 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000005266 casting Methods 0.000 title abstract 2
- 230000005684 electric field Effects 0.000 claims abstract description 8
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 4
- 229910052580 B4C Inorganic materials 0.000 claims description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 2
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 2
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 2
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 229910052750 molybdenum Inorganic materials 0.000 claims description 2
- 239000011733 molybdenum Substances 0.000 claims description 2
- 229910052697 platinum Inorganic materials 0.000 claims description 2
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 2
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 2
- 229910052721 tungsten Inorganic materials 0.000 claims description 2
- 239000010937 tungsten Substances 0.000 claims description 2
- 229910052726 zirconium Inorganic materials 0.000 claims description 2
- 239000012535 impurity Substances 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- 238000007711 solidification Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 239000000470 constituent Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000010813 municipal solid waste Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/02—Use of electric or magnetic effects
Abstract
The invention discloses a method for improving steel ingot casting quality. The method mainly comprises the step that after molten steel pouring is ended, two electrodes are utilized to apply direct-current electric field or direct-current pulse electric field in molten steel in an ingot mold, so that mixed impurities are promoted to float upwards, shrinkage and loosening are reduced, the grain size is refined, and the steel ingot quality is improved.
Description
Technical field
The present invention relates to a kind of ingot quality control technology, be specifically related to a kind of method improving steel ingot ingot quality in During Ingot Solidification
Background technology
Be poured into the molten steel in ingot mould, first form steel ingot shell due to the chilling effect of ingot mould.Hinder heat transfer between inner molten steel and ingot mould owing to forming gap between steel ingot shell and ingot mould, and the freezing rate of inner molten steel is significantly reduced.For relatively large steel ingot, solidify needs for a long time due to inner molten steel, therefore, internal steel water constituent easily produces segregation, non-metallic inclusion is assembled and shrinkage cavity and the defect such as loose.
Due to the Solidification Characteristics of steel ingot, at present, there is no good Method and Technology measure in order to thoroughly to eliminate the above-mentioned defect produced in During Ingot Solidification.
Summary of the invention
The present invention is directed to above-mentioned the deficiencies in the prior art, provide a kind of method improving ingot quality, the method by imposing DC electric field or DC pulse electric field in molten steel, thus effective floating of nonmetal inclusion in promotion molten steel, reduce steel ingot internal shrinkage and loose, ingot quality is had obvious lifting.
Method of the present invention comprises the following steps: after pouring molten steel terminates, and utilizes in the molten steel of two electrodes in ingot mould and applies a DC electric field or DC pulse electric field, promotes to be mingled with floating, reduces shrinkage cavity and loosens, refining grain size, improving ingot quality.
According to exemplary embodiment of the present invention, in two electrodes, an electrode or can directly can be inserted into molten steel from the top of ingot mould and steel contacts, wherein, the steel identical or close with the composition of molten steel can be adopted as electrode, can not molten steel be polluted, and need not extract, or can directly ingot mould be used as electrode; An other electrode can be imbedded in the sidewall bottom steel ingot chassis or ingot mould, or can directly be used as electrode in chassis or ingot mould.Wherein, when being used as two electrodes by ingot mould simultaneously, described two electrodes can be the positions that two of ingot mould are different.
According to exemplary embodiment of the present invention, can by cable or wire by two Electrode connection on dc source or direct current pulse power source, the output voltage of dc source or direct current pulse power source can be 5V-15V, and current density can be 1.0 × 10
-5acm
2-1.0 × 10
1acm
2.
According to exemplary embodiment of the present invention, one or two or more kinds that can comprise respectively in zirconia, carborundum, boron carbide, silicon nitride, zirconium boride, molybdenum, tungsten metal, platinum and steel of material of two electrodes combinationally uses.
According to exemplary embodiment of the present invention, the processing time of energising process can determine according to the setting time of steel ingot, general can galvanization in whole process of setting, distance between two electrodes can be determined, as long as two electrodes contact with the molten steel in ingot mould or solidifying steel according to the height of steel ingot.
According to exemplary embodiment of the present invention, relatively little steel ingot (such as, weight can be the steel ingot of 0.5t to 80t) setting time is relatively short, and (such as, current density can be 0.5Acm therefore can to adopt relatively large current density
2-10Acm
2); Relatively large steel ingot (such as, weight can for being greater than the steel ingot of 100t) setting time is relatively long, and (such as, current density can be 1.0 × 10 therefore can to adopt relatively little current density
-5acm
2-be less than 0.5Acm
2).
According to said method of the present invention, at least one in following technique effect can be obtained:
(1) improve ingot quality Be very effective: steel ingot field trash is significantly reduced, shrinkage cavity is loose to be reduced, grain refinement;
(2) device is simple, easy to use: only need be connected with power supply by steel ingot by electrode, do not need to do any change to current pouring technology, therefore, implementation process is simple and convenient, and without the need to extra charge.
Detailed description of the invention
Below will carry out contrast according to example of the present invention and comparative examples and embody above-mentioned technique effect of the present invention.Wherein, following example of the present invention and comparative examples all with 180 tons of steel ingots for objective for implementation, wherein, difference according to example of the present invention and comparative examples is: example according to the present invention sets electrode at steel ingot top/bottom part, add pulse dc power, voltage is 30V, and current density is 10
-2acm
2, the processing time is 180min;
Steel ingot is after solidifying cooling, and the steel ingot getting below rising head 300mm place carries out low power analysis.Specific embodiment and result as shown in the table.
As seen from the above table, the quality of steel ingot obviously can be improved according to method of the present invention.
Claims (5)
1. improve a method for steel ingot ingot quality, it is characterized in that, after pouring molten steel terminates, utilize in the molten steel of two electrodes in ingot mould and apply DC electric field or DC pulse electric field.
2. method according to claim 1, it is characterized in that, an electrode in two electrodes is from top and the steel contacts of ingot mould or directly insert molten steel, an other electrode is imbedded in the sidewall bottom steel ingot chassis or ingot mould, or is directly used as electrode in chassis or ingot mould.
3. method according to claim 1, is characterized in that, an electrode in two electrodes is ingot mould, and an other electrode is imbedded in the sidewall bottom steel ingot chassis or ingot mould, or is directly used as electrode in chassis or ingot mould.
4. method according to claim 1, is characterized in that, by cable or wire by two Electrode connection on dc source or direct current pulse power source, the output voltage of dc source or direct current pulse power source is 5V-15V, and current density is 1.0 × 10
-5acm
2-10Acm
2.
5. method according to claim 1, is characterized in that, the material of two electrodes comprises at least one in zirconia, carborundum, boron carbide, silicon nitride, zirconium boride, molybdenum, tungsten metal, platinum and steel respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510109034.9A CN104668526B (en) | 2015-03-12 | 2015-03-12 | Improve the method for steel ingot ingot quality |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510109034.9A CN104668526B (en) | 2015-03-12 | 2015-03-12 | Improve the method for steel ingot ingot quality |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104668526A true CN104668526A (en) | 2015-06-03 |
| CN104668526B CN104668526B (en) | 2017-08-08 |
Family
ID=53304401
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510109034.9A Expired - Fee Related CN104668526B (en) | 2015-03-12 | 2015-03-12 | Improve the method for steel ingot ingot quality |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104668526B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105583382A (en) * | 2016-03-07 | 2016-05-18 | 东北大学 | Method for suppressing casting blank inclusion segregation by means of pulse current |
| CN105779692A (en) * | 2016-03-11 | 2016-07-20 | 东北大学 | Method for controlling size and number of inclusions in molten metal |
| CN110202118A (en) * | 2019-05-20 | 2019-09-06 | 北京科技大学 | The preparation method of carbon ledge cast steel in a kind of vanadium, titanium microalloying |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4544019A (en) * | 1982-05-14 | 1985-10-01 | Hitachi, Ltd. | Method and apparatus for manufacturing composite steel ingot |
| CN1695848A (en) * | 2005-04-25 | 2005-11-16 | 安徽工业大学 | Method in use for conticaster for controlling solidification structure of casting block |
| CN1931476A (en) * | 2005-09-13 | 2007-03-21 | 鞍钢股份有限公司 | Method of applying electric field energy on molten steel to improve quality of silicon steel billet |
| CN102517417A (en) * | 2011-12-08 | 2012-06-27 | 辽宁科技大学 | Method for removing and controlling foreign substances in metal and alloy |
| CN103436655A (en) * | 2013-05-23 | 2013-12-11 | 沈阳东大高温材料有限公司 | Method for removing and refining inclusion and bubble from molten metal |
-
2015
- 2015-03-12 CN CN201510109034.9A patent/CN104668526B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4544019A (en) * | 1982-05-14 | 1985-10-01 | Hitachi, Ltd. | Method and apparatus for manufacturing composite steel ingot |
| CN1695848A (en) * | 2005-04-25 | 2005-11-16 | 安徽工业大学 | Method in use for conticaster for controlling solidification structure of casting block |
| CN1931476A (en) * | 2005-09-13 | 2007-03-21 | 鞍钢股份有限公司 | Method of applying electric field energy on molten steel to improve quality of silicon steel billet |
| CN102517417A (en) * | 2011-12-08 | 2012-06-27 | 辽宁科技大学 | Method for removing and controlling foreign substances in metal and alloy |
| CN103436655A (en) * | 2013-05-23 | 2013-12-11 | 沈阳东大高温材料有限公司 | Method for removing and refining inclusion and bubble from molten metal |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105583382A (en) * | 2016-03-07 | 2016-05-18 | 东北大学 | Method for suppressing casting blank inclusion segregation by means of pulse current |
| CN105779692A (en) * | 2016-03-11 | 2016-07-20 | 东北大学 | Method for controlling size and number of inclusions in molten metal |
| CN110202118A (en) * | 2019-05-20 | 2019-09-06 | 北京科技大学 | The preparation method of carbon ledge cast steel in a kind of vanadium, titanium microalloying |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104668526B (en) | 2017-08-08 |
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| C10 | Entry into substantive examination | ||
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
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Granted publication date: 20170808 |