CN103611893A - Method and device for filling ingot mold air gap - Google Patents
Method and device for filling ingot mold air gap Download PDFInfo
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- CN103611893A CN103611893A CN201310614340.9A CN201310614340A CN103611893A CN 103611893 A CN103611893 A CN 103611893A CN 201310614340 A CN201310614340 A CN 201310614340A CN 103611893 A CN103611893 A CN 103611893A
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Abstract
The invention discloses a method and device for filling an ingot mold air gap to effectively improve casting quality. According to the method and device, an iron box is installed nearby an ingot mold, the iron box is filled with low-melting metal, and a heater is arranged below the iron box. A conical channel is formed in the upper end of the side wall of the ingot mold, wherein a stopper rod is used for blocking the conical channel. When molten steel is poured, the stopper rod is pulled out of the channel through an instrument by the time a shell is formed by the molten steel and the stable air gap is formed between the shell and the ingot mold. The heater is started to melt the low-melting metal inside the iron box, a choke plug is inserted into the conical channel in the wall of the ingot mold, and the low-melting metal is poured into the air gap through a pipeline till the air gap is filled. According to the method and device for filling the ingot mold air gap, the low-melting metal is poured into the ingot mold air gap, the heat transfer rate of a casting surface is increased, casting surface stress is reduced, and therefore casting surface cracks are reduced; the conical stopper rod can be pulled out conveniently, and the low-melting metal can be recovered to be reused.
Description
Technical field
The present invention relates to ingot mould casting method and device thereof in steel manufacture process, particularly a kind of method and device thereof of filling ingot mould air gap.
Background technology
The method of casting in Ferrous Metallurgy technique has continuous casting and die casting, compares with continuous casting, is moulded into heavy section production field and has unique advantage.Can meet heavy section and produce the requirement large to density; High-yield strength, ballistic work material can be provided.Yet, die cast easily cracks defect, steel ingot forms the initial stage of solidified shell, due to solidification of molten steel volume contraction, make to produce air gap between steel ingot base shell and ingot mould, after air gap forms, the heat that comes from the liquid heart has raise again solidified shell temperature, scull deliquescing, ferrostatic pressure presses to die wall scull, because direct heat conduction has been accelerated again, surface temperature declines once more, after this scull is thrown off with die wall again, this process repeatedly, until thickening, solidified shell can bear ferrostatic pressure, now air gap is stable forms, surface temperature rises to then slow decreasing of maximum.The generation of air gap makes the cooling velocity of steel ingot inside be greater than the cooling velocity of surface of steel ingot, in addition steel ingot outer surface produces inhibition to the contraction of steel ingot inside, and air gap forms the rear long duration, surface of steel ingot temperature occurs ging up, and steel ingot internal temperature continues to reduce, above factor acting in conjunction, the surface stress of steel ingot occurs oppositely, surface of steel ingot presents pressure state, but tension appears in steel ingot inside.So, when ingot solidification finishes, presenting surperficial pressurized, steel ingot occurs that the dangerous time of micro-crack is the moment that maximum tension stress appears in surface.Therefore improve the impact of air gap, be conducive to improve casting quality, reduce the generation of alligatoring.
Open (bulletin) number: the CN1415445 of Chinese patent, a kind of upper feeding water-cooled die casting technology is disclosed, this technology is in solidifying steel process from bottom to top, and the gas progressively producing and impurity can all rise to top discharge system through molten steel, has avoided occurring in steel billet pore and trachoma phenomenon.Its advantage is that the close property of the matter of steel billet is good, does not need forging stock in deep-processing process, and directly finish rolling or forging just can become final products, has improved the yield rate of producing, and reduces production costs.But air gap problem does not solve during metal freezing, easily cause cast(ing) surface stress to increase, make surface crack defect.
Open (bulletin) number: the CN2753487 of Chinese patent, discloses a kind of spherical granule composite die casting protecting slag.This spherical granule composite die casting protecting slag consists of spheric granules; spheric granules surface is wrapped with one deck dressing as thin as a wafer; thereby form a kind of spherical granule composite die casting protecting slag with dressing structure; graphite in dressing (or other carbonaceous materials) content is higher; can increase the angle of wetting between molten steel and spheric granules and reduce spheric granules and ingot mould inwall between frictional force; thereby the rotten angle phenomenon of avoiding four angles of ingot butt to form because of slag inclusion; improve Ingot Surface Quality; shorten the steel ingot finishing activity duration, improve steel ingot finishing productivity ratio.But the thermal velocity that turns of this covering slag is not good especially, and filling air gap is also not easy.
Summary of the invention
The invention provides a kind of method and device thereof of filling ingot mould air gap, effectively improve casting quality.
Fill a method for ingot mould air gap, the method comprises following content:
An iron case is installed near ingot mould, in iron case, is filled it up with low-melting-point metal, iron lower box part arranges heater.In the upper end of ingot mould sidewall, open a diameter at the pyramid type passage of 5-50mm, the direction of pyramid type channel centerline and die wall is into θ angle, θ=10～45 °, with stopper by pyramid type passage plugging.Casting is during molten steel, until molten steel forms base shell, and and ingot mould between while forming stable air gap, by apparatus, extract passage stopper.Heater is opened, the low-melting-point metal in iron case is melted, chock plug is inserted in the pyramid type passage of die wall, by pipeline to inject in air gap fusing point at 50-800 ℃, boiling point the low-melting-point metal higher than 1500 ℃, until air gap is full of.
When described air gap increases, according to law of connected vessels, keep the interior liquid level of iron case consistent with the air gap height in ingot mould, strengthen gradually the amount that passes into air gap low-melting-point metal, air gap is filled fully.
Described low-melting-point metal is 660.1 ℃ of fusing points, the aluminium that boiling point is 2500 ℃.
The device that a kind of method of filling ingot mould air gap adopts, this device comprises: iron case, heater, pipeline and chock plug, iron case is arranged near ingot mould, on the pipeline of iron case, the height on edge is highly consistent with edge, ingot mould top, iron lower box part arranges heater, pipeline one end connects iron case, and the other end connects chock plug.
Described chock plug is identical with stopper face shaping, is olive shape, and centre is tubular conduit.
The present invention compares with existing similar technology, and its significant beneficial effect is embodied in:
By being filled with low-melting-point metal to ingot mould air gap, accelerated cast(ing) surface heat transfer rate, reduce cast(ing) surface stress, thereby reduced the generation of cast(ing) surface slight crack; Pyramid type stopper can conveniently be extracted, and low-melting-point metal is recyclable to be utilized again.
Accompanying drawing explanation
Fig. 1 is a kind of apparatus structure and occupation mode schematic diagram of filling ingot mould air gap.
Fig. 2 is chock plug schematic diagram in a kind of device of filling ingot mould air gap.
The specific embodiment
As shown in Figure 1 and Figure 2, a kind of method and device thereof of filling ingot mould air gap, concrete technical scheme is as follows:
An iron case 8 is installed near ingot mould, and on the pipeline 10 of iron case 8, the height on edge, with ingot mould 2 tops along highly consistent, is filled it up with low-melting-point metal aluminium in iron case 8, and iron case 8 bottoms arrange heater 9.Iron case 8 connects a pipeline 10, and pipeline 10 other ends connect a chock plug 6.In the upper end of ingot mould 2 sidewalls, open a diameter at the pyramid type passage 7 of 5-50mm, the direction of pyramid type passage 7 center lines and die wall is into θ angle, θ=10～45 °, with stopper by 7 shutoff of pyramid type passage.Casting is during molten steel 3, until molten steel 3 forms base shells 4, and and ingot mould between while forming stable air gap 5, by apparatus, extract the stopper of pyramid type passage.Heater 9 is opened, the low-melting-point metal aluminium in iron case 8 is melted, chock plug 6 is inserted in the pyramid type passage 7 of die wall, described chock plug 6 is identical with stopper face shaping, is olive shape, and centre is tubular conduit.By pipeline 10 to the interior injection low-melting-point metal of air gap 5 aluminium, until air gap is full of.When air gap 5 increases, according to law of connected vessels, keep iron case 8 interior liquid levels highly consistent with the air gap 5 in ingot mould, strengthen gradually the amount that passes into air gap 5 low-melting-point metals, air gap 5 is filled fully.
Claims (5)
1. fill a method for ingot mould air gap, it is characterized in that the method comprises following content:
An iron case is installed near ingot mould, in iron case, fill it up with low-melting-point metal, iron lower box part arranges heater, in the upper end of ingot mould sidewall, open a diameter at the pyramid type passage of 5-50mm, the direction of pyramid type channel centerline and die wall is into θ angle, θ=10～45 °, with stopper by pyramid type passage plugging, during casting molten steel, until molten steel forms base shell, and and ingot mould between while forming stable air gap, by apparatus, extract passage stopper, heater is opened, low-melting-point metal in iron case is melted, chock plug is inserted in the pyramid type passage of die wall, by pipeline, in air gap, inject fusing point at 50-800 ℃, boiling point is higher than the low-melting-point metal of 1500 ℃, until air gap is full of.
2. a kind of method of filling ingot mould air gap according to claim 1, while it is characterized in that the air gap forming between the base shell of molten steel and ingot mould increases, according to law of connected vessels, keep the interior liquid level of iron case consistent with the air gap height in ingot mould, strengthen gradually the amount that passes into air gap low-melting-point metal, air gap is filled fully.
3. a kind of method of filling ingot mould air gap according to claim 1, is characterized in that said low-melting-point metal is 660.1 ℃ of fusing points, the aluminium that boiling point is 2500 ℃.
4. the device that the method for filling ingot mould air gap adopts, it is characterized in that this device comprises: iron case, heater, pipeline and chock plug, iron case is arranged near ingot mould, on the pipeline of iron case, the height on edge is highly consistent with edge, ingot mould top, iron lower box part arranges heater, pipeline one end connects iron case, and the other end connects chock plug.
5. the device that a kind of method of filling ingot mould air gap according to claim 4 adopts, is characterized in that said chock plug is identical with stopper face shaping, is olive shape, and centre is tubular conduit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310614340.9A CN103611893B (en) | 2013-11-26 | 2013-11-26 | A kind of method and device thereof of filling ingot mold air gap |
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| CN201310614340.9A CN103611893B (en) | 2013-11-26 | 2013-11-26 | A kind of method and device thereof of filling ingot mold air gap |
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| CN103611893A true CN103611893A (en) | 2014-03-05 |
| CN103611893B CN103611893B (en) | 2015-08-19 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111496199A (en) * | 2019-01-30 | 2020-08-07 | 上海交通大学 | Device for increasing cooling speed of cast ingot and application method thereof |
| CN112496279A (en) * | 2020-11-13 | 2021-03-16 | 攀钢集团攀枝花钢铁研究院有限公司 | Ingot feeding method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2248891A1 (en) * | 1973-10-25 | 1975-05-23 | Boehler & Co Ag Geb | |
| WO2006000040A1 (en) * | 2004-06-25 | 2006-01-05 | Cast Centre Pty Ltd | Improved casting mould |
| JP2006297413A (en) * | 2005-04-18 | 2006-11-02 | Daido Steel Co Ltd | Method for producing magnesium alloy ingot |
| CN201423430Y (en) * | 2009-05-11 | 2010-03-17 | 南阳汉冶特钢有限公司 | Ingot mold device cooled by water-cooled crystallizer |
-
2013
- 2013-11-26 CN CN201310614340.9A patent/CN103611893B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2248891A1 (en) * | 1973-10-25 | 1975-05-23 | Boehler & Co Ag Geb | |
| US3927855A (en) * | 1973-10-25 | 1975-12-23 | Boehler & Co Ag Geb | Fluid-cooled mold |
| WO2006000040A1 (en) * | 2004-06-25 | 2006-01-05 | Cast Centre Pty Ltd | Improved casting mould |
| JP2006297413A (en) * | 2005-04-18 | 2006-11-02 | Daido Steel Co Ltd | Method for producing magnesium alloy ingot |
| CN201423430Y (en) * | 2009-05-11 | 2010-03-17 | 南阳汉冶特钢有限公司 | Ingot mold device cooled by water-cooled crystallizer |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111496199A (en) * | 2019-01-30 | 2020-08-07 | 上海交通大学 | Device for increasing cooling speed of cast ingot and application method thereof |
| CN112496279A (en) * | 2020-11-13 | 2021-03-16 | 攀钢集团攀枝花钢铁研究院有限公司 | Ingot feeding method |
| CN112496279B (en) * | 2020-11-13 | 2022-10-04 | 攀钢集团攀枝花钢铁研究院有限公司 | Ingot feeding method |
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| CN103611893B (en) | 2015-08-19 |
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