CN1326829A - Heating casting mold and gas film continuous casting method - Google Patents
Heating casting mold and gas film continuous casting method Download PDFInfo
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- CN1326829A CN1326829A CN 01113026 CN01113026A CN1326829A CN 1326829 A CN1326829 A CN 1326829A CN 01113026 CN01113026 CN 01113026 CN 01113026 A CN01113026 A CN 01113026A CN 1326829 A CN1326829 A CN 1326829A
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Abstract
One graphite ring is mounted at the outlet of heating casting mold and lubricant oil and gas are filled through the oil intake hole and gas intake hole in the graphite ring and into between the cast rod and casting mold to form gas film, so that the casting mold does not contact with the cast rod and the solid-liquid interface is controlled in the graphite ring range inside the casting mold during solidification. The said process can avoid stray crystal and leakage accident, raise the inner quality and surface smoothness of cast rod with orientated solidified structure and monocrystal structure, increase continuous casting speed, and raise production efficiency.
Description
The present invention relates to a kind of continuous casing, relate in particular to a kind of heating casting mold and gas film continuous casting method, belong to metallurgical, technical field of material.
In the prior art, there is the heated mold of employing to replace cold mould in traditional continuous casting, to eliminate the possibility of casting mold inwall forming core.Simultaneously, the cooling effect of cooler outside type makes hot-fluid be transmitted to the cooling zone by the casting mold outlet along the cast direction, thereby has formed the directional solidification condition.As United States Patent (USP) 4515204 " ContinuousMetal Casting ", document " technological parameter and the performance of continuously casting copper monocrystalline bar " (Xu Zhenming etc., " artificial lens journal " 1998,27 the 3rd phases of volume) all the heated mold continuous casing there is more detailed introduction.Make the ingot casting that metal single crystal can be cast out continuously in this way or have oriented freezing organization, but heated mold is when continuous casting, the solid liquid interface of casting rod is positioned at the casting mold exit, leakage accident can often take place when casting speed is excessive, particularly horizontal casting with vertical under when drawing method, continuous casting is interrupted.Therefore, this method must be carried out under very low casting speed, and efficient is very low.The metal big (as copper) to density, when horizontal casting, the surface tension of molten metal can not be kept the deadweight of itself, solid liquid interface must be controlled at casting mold inside, because molten metal contacts with the type wall, easily form stray crystal like this, reduce the internal soundness of casting rod on casting rod surface.When solid liquid interface when casting mold is inner, because casting mold and the friction of casting between the rod easily produce casting flaws such as drawing crack.
The objective of the invention is to above-mentioned deficiency, a kind of novel heating casting mold and gas film continuous casting method is provided, can steadily increase casting speed, improve excellent internal soundness of casting and surface smoothness, enhance productivity at prior art.
For realizing such purpose, in the technical scheme of the present invention, graphite annulus is installed in the heated mold exit, graphite annulus and heated mold sealing by air admission hole on the graphite annulus and fuel feed hole, are injected lubricating oil and gas (nitrogen, argon gas) between casting rod and casting mold, make in the casting process and form air film on casting rod surface, avoid casting contacting of rod and casting mold, reduce to cast the frictional force of rod and casting mold, improve and cast excellent surface smoothness and internal soundness.Adopt calandria that casting mold is heated during continuous casting, make temperature surpass the fusing point of metal, the seeding rod is placed on the graphite annulus place, introduce liquid metal to casting mold, it is oily gentle to feed in graphite annulus, the beginning continuous casting.Specific embodiment of the present invention is as follows:
1, the selected alloy of fusing in melting furnace is overheated 100 ℃～200 ℃.
2, the temperature of heated mold is fusing point+50～100 ℃ of continuous casting of metals.
3, lubrication pressure is 4～8Mpa, and the pressure of gas (nitrogen, argon gas) is 4～8kg.
The present invention lays graphite annulus at the heated mold port of export, and injects lubricating oil and gas by graphite annulus between casting rod and casting mold, makes in the casting process and forms air film on casting rod surface, avoids casting contacting of rod and casting mold, is difficult for the formation stray crystal on casting rod surface.Simultaneously, solid liquid interface in the process of setting can be controlled in the graphite annulus scope in the casting mold, avoid leakage accident; Because of in casting process, forming air film between casting rod and casting mold, overcome the casting flaws such as drawing crack in the casting process again, improved surface smoothness and casting speed.Therefore, adopt the method can prepare the directional solidification or the monocrystalline casting rod of surface smoothness height, no stray crystal, satisfy the requirement of actual condition.
Below in conjunction with accompanying drawing technical scheme of the present invention is further described.
Fig. 1 is a heating casting mold and gas film continuous casting method device schematic diagram of the present invention.
Among the figure, 1 is calandria, and 2 is casting mold, and 3 is liquid metal, and 4 is graphite annulus, and 5 is solid liquid interface, and 6 is fuel feed hole, and 7 is air admission hole, and 8 are the casting rod, and 9 is cooler, and 10 is the seeding rod.
Among the figure, graphite annulus 4 is installed in the exit of heated mold 2, graphite annulus 4 and heated mold 2 sealings, graphite annulus 4 both sides correspondences have air admission hole 7 and fuel feed hole 6.
When continuous casting, at first adopt calandria 1 casting mold 2 heating.When the fusing point of temperature above metal, seeding rod 10 is placed on graphite annulus 4 places, introduce liquid metal to casting mold, it is oily gentle to feed in graphite annulus, and continuous casting begins.In the seeding starting stage, it is slow that casting speed is wanted, and progressively quickens, and carries out the transition to desired speed stably, enters the stabilization sub stage.
Below further describe technical scheme of the present invention by specific embodiment.Embodiment 1: the continuous casting of heated mold copper single crystal air film
In the resistance furnace melting, temperature is 1250 ℃, and the temperature of heated mold is 1180 ℃, and lubricating oil (Ggarctic Shc230) pressure is 5Mpa, and the feeding nitrogen gas pressure is 5kg.Graphite annulus is installed in exit at heated mold, and graphite annulus and heated mold sealing at first adopt calandria that casting mold is heated when continuous casting, and temperature is 1180 ℃, and the seeding rod is placed on the graphite annulus place.Improve the pressure head of liquid metal, liquid metal is introduced casting mold, it is oily gentle to feed in graphite annulus, and continuous casting begins.In the seeding starting stage, it is slow that casting speed is wanted, and progressively quickens, and carries out the transition to desired speed stably, enters the stabilization sub stage.Casting speed is 40mm/min, can cast out inner no stray crystal continuously, the copper single crystal casting rod (φ 8mm) of any surface finish.Embodiment 2: the continuous casting of heated mold directional solidification copper air film
In the resistance furnace melting, temperature is 1250 ℃, and the temperature of heated mold is 1180 ℃, and lubricating oil (Ggarctic Shc230) pressure is 5Mpa, and the feeding nitrogen gas pressure is 5kg.Graphite annulus is installed in exit at heated mold, and graphite annulus and heated mold sealing at first adopt calandria that casting mold is heated when continuous casting, and temperature is 1180 ℃, and the seeding rod is placed on the graphite annulus place.Improve the pressure head of liquid metal, liquid metal is introduced casting mold, it is oily gentle to feed in graphite annulus, and continuous casting begins.In the seeding starting stage, it is slow that casting speed is wanted, and progressively quickens, and carries out the transition to desired speed stably, enters the stabilization sub stage.Casting speed is 100mm/min, can cast out inner no stray crystal continuously, the casting in bronze rod of the oriented freezing organization of any surface finish (φ 8mm).Embodiment 3: the continuous casting of heating casting mold and gas film directional solidification aluminium
In the resistance furnace melting, temperature is 750 ℃, and the temperature of heated mold is 720 ℃, and lubricating oil (GgarcticShc230) pressure is 5Mpa, and the feeding nitrogen gas pressure is 5kg.Graphite annulus is installed in exit at heated mold, and graphite annulus and heated mold sealing at first adopt calandria that casting mold is heated when continuous casting, and temperature is 720 ℃, and the seeding rod is placed on the graphite annulus place.Improve the pressure head of liquid metal, liquid metal is introduced casting mold, it is oily gentle to feed in graphite annulus, and continuous casting begins.In the seeding starting stage, it is slow that casting speed is wanted, and progressively quickens, and carries out the transition to desired speed stably, enters the stabilization sub stage.Casting speed is 100mm/min, can cast out inner no stray crystal continuously, the aluminium casting rod (φ 8mm) of the oriented freezing organization of any surface finish.
The present invention and present heated mold continuous casing ratio have avoided contacting of casting rod and casting mold, Casting rod surface is difficult for forming stray crystal, simultaneously, makes that solid liquid interface can be controlled at the inherent stone of casting mold in the process of setting In the China ink ring scope, avoid leaking, owing to forming air film between casting rod in casting process and casting mold, overcome even again The casting flaws such as drawing crack in the casting process have improved and have had the inner matter of oriented freezing organization and single crystal organization casting rod Amount and surface smoothness increase casting speed, have improved production efficiency.
Claims (1)
1, a kind of heating casting mold and gas film continuous casting method, it is characterized in that the at first selected alloy of fusing in melting furnace, overheated 100 ℃～200 ℃, with calandria (1) casting mold (2) is heated, the temperature of heated mold is fusing point+50～100 ℃ of continuous casting of metals, the fusing point that surpasses metal when temperature, seeding rod (10) is placed on the graphite annulus of installing in casting mold (2) exit (4) to be located, introduce liquid metal to casting mold (2), air admission hole (7) and fuel feed hole (6) by graphite annulus (4) inject lubricating oil and gas, between casting mold (2) and casting rod (8), form air film, lubrication pressure is 4～8Mpa, gas (nitrogen, argon gas) pressure is 4～8kg, and casting speed progressively quickens, and smooth transition is to the stabilization sub stage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011130261A CN1167527C (en) | 2001-05-31 | 2001-05-31 | Heating casting mold and gas film continuous casting method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011130261A CN1167527C (en) | 2001-05-31 | 2001-05-31 | Heating casting mold and gas film continuous casting method |
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| CN1326829A true CN1326829A (en) | 2001-12-19 |
| CN1167527C CN1167527C (en) | 2004-09-22 |
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| CNB011130261A Expired - Fee Related CN1167527C (en) | 2001-05-31 | 2001-05-31 | Heating casting mold and gas film continuous casting method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100372632C (en) * | 2006-05-19 | 2008-03-05 | 苏州有色金属加工研究院 | Continuous lubricating system for semi-continuous casting of aluminium and aluminium alloy |
| CN101332493B (en) * | 2008-07-31 | 2010-06-02 | 东北大学 | Gas film quick continuous casting device and method in magnetostatic field |
| CN101850405A (en) * | 2010-06-18 | 2010-10-06 | 江苏技术师范学院 | Experimental device for simulating gas film continuous casting crystallizer |
| CN101048245B (en) * | 2004-10-25 | 2011-01-12 | 昭和电工株式会社 | Continuous casting apparatus, continuous casting method for aluminum alloy |
| CN105091762A (en) * | 2015-05-26 | 2015-11-25 | 雷艳梅 | Light knife transmission-type reagent and soup smearing uniformity detection method and apparatus |
| CN106180600A (en) * | 2016-08-30 | 2016-12-07 | 中国重型机械研究院股份公司 | Magnesium alloy slab casting gas shield ring |
-
2001
- 2001-05-31 CN CNB011130261A patent/CN1167527C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101048245B (en) * | 2004-10-25 | 2011-01-12 | 昭和电工株式会社 | Continuous casting apparatus, continuous casting method for aluminum alloy |
| CN100372632C (en) * | 2006-05-19 | 2008-03-05 | 苏州有色金属加工研究院 | Continuous lubricating system for semi-continuous casting of aluminium and aluminium alloy |
| CN101332493B (en) * | 2008-07-31 | 2010-06-02 | 东北大学 | Gas film quick continuous casting device and method in magnetostatic field |
| CN101850405A (en) * | 2010-06-18 | 2010-10-06 | 江苏技术师范学院 | Experimental device for simulating gas film continuous casting crystallizer |
| CN101850405B (en) * | 2010-06-18 | 2011-09-28 | 江苏技术师范学院 | Experimental device for simulating gas film continuous casting crystallizer |
| CN105091762A (en) * | 2015-05-26 | 2015-11-25 | 雷艳梅 | Light knife transmission-type reagent and soup smearing uniformity detection method and apparatus |
| CN106180600A (en) * | 2016-08-30 | 2016-12-07 | 中国重型机械研究院股份公司 | Magnesium alloy slab casting gas shield ring |
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| Publication number | Publication date |
|---|---|
| CN1167527C (en) | 2004-09-22 |
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