EP0998589B1 - Verfahren und anlage zur herstellung von "leichtstahl" in form von strangguss unter gaseinschluss - Google Patents
Verfahren und anlage zur herstellung von "leichtstahl" in form von strangguss unter gaseinschluss Download PDFInfo
- Publication number
- EP0998589B1 EP0998589B1 EP98939634A EP98939634A EP0998589B1 EP 0998589 B1 EP0998589 B1 EP 0998589B1 EP 98939634 A EP98939634 A EP 98939634A EP 98939634 A EP98939634 A EP 98939634A EP 0998589 B1 EP0998589 B1 EP 0998589B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas
- strand
- cavities
- continuous casting
- material strand
- 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.)
- Expired - Lifetime
Links
Images
Classifications
-
- 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
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
- B22D11/041—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds for vertical casting
-
- 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
- B22D11/10—Supplying or treating molten metal
- B22D11/11—Treating the molten metal
-
- 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
- B22D27/003—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using inert gases
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/08—Alloys with open or closed pores
Definitions
- the invention relates to a continuous casting process for Manufacture of material profiles that have cavities and a continuous casting device for performing such Procedure.
- German patent application 38 14 030 A1 relates a foam steel as a structural dressing material. This will by sticking together of spherical or with Trough-provided sheet metal, which then has a honeycomb structure form, manufactured.
- German published patent application 44 16 371 A1 is a Process for producing long, porous metal foam bodies known on aluminum basis. Increase these metal foam bodies, inserted in aluminum hollow profiles, their section modulus against bending and twisting.
- the metal foam body are made of metal powder and blowing agent under heating this mixture to at least the melting temperature of the Foamed metal to a porous metal body.
- German Offenlegungsschrift 35 16 737 A1 are a Method and device for producing gas bubbles as cavities penetrated by metallic materials in Form of profiles known, which in relation to their own weight a higher section modulus at bending, buckling and have torsional stresses.
- the method described there has the disadvantage that the introduced gas bubbles can not be positioned because them into an upward strand of material in the still liquid Condition and are therefore due to their First move the buoyancy in the melt until it melts stiffens. In addition, only one is relative in this method slight reduction in the specific gravity of the starting material possible.
- US-A-3 941 182 discloses a method and an apparatus for covering steel wires with a metal foam compound described.
- the metal foam is used only for protection the wires from breaking.
- the production of material profiles cavities are not addressed there.
- the Gas is introduced to produce the metal foam via feed lines to which a stirrer for distributing the gas bubbles is connected downstream within the molten metal is arranged. An exact positioning of cavities in the metal foam is not possible due to the stirrer.
- the invention has for its object a continuous casting process for the production of material profiles, especially steel profiles, which have cavities, and a continuous casting device to carry out such a procedure the material weight of the profiles by insertion of gas bubbles, which are preferred in their location and extent can be designed flexibly and form cavities becomes.
- This process can be used to create voids in material profiles position as desired, because the gas bubbles will introduced into those material strand areas in which one pasty structure of the material is present. Under a batter Structure becomes a between liquid melt and solidification understood the lying state of the material in which there are still gas bubbles - possibly under high pressure - allow to be introduced into the material by means of nozzles or the like. There is therefore an inherent movement of the gas bubbles in the material strand - if at all - only possible to a very limited extent and should be completely omitted if a certain position and Structure of the cavities is sought.
- Metallic materials are preferably used as the material.
- the gas is preferably at several points initiated within the strand of material on a Isothermal area. This way you can simultaneously several cavities created by the inclusion of gas bubbles become.
- a noble gas for example, is preferred as the gas Argon, used to avoid unwanted chemical reactions between the material and the gas a change in the material structure in the solidified state can take place.
- step c) the gas can be continuous or pulsed be fed.
- the gas can be continuous or pulsed be fed.
- the structure of the cavities created can by at least an ultrasonic measuring device to be monitored in the area of running material strand is arranged.
- the outer skin of the strand of material is preferably through Fibers reinforced.
- step c) the speed of the material strand is preferred greater than the rate of buoyancy from bubbles formed in the gas.
- the initiated Gas bubbles do not go up towards the liquid material area escape. Because of the doughy Structure of the material part in which the gas bubbles are introduced is, however, the rate of buoyancy in the normal case negligible small. Because of their dependence on in individual cases, however, it can contribute to the size of the cavities very large cavities of some importance.
- This device ensures both guidance of the Strands of material from top to bottom as well as an introduction the gas bubbles in the area inside the mold, in the material with the appropriate pasty structure is present.
- a control device for example a controllable valve block, provided with which the gas inlet in the strand of material in their amount by that gas pressure used depends, and / or their shape, continuously or pulsed, can be controlled.
- the supply of gas can be at the outlet end of the gas pipes Arranged nozzles are made, the openings of which depend on the desired cross-sectional shape for the cavities, for example a round, slit-shaped or rectangular cross-section can have.
- At least one ultrasound measuring device for monitoring is preferred the structure of the voids of the running strand of material intended.
- the structure of the cavities can reproduce the control device are supplied so that, depending on the measurement results of the Ultrasonic measuring device, the desired structure of the cavities can be generated. For example, by increasing the Gas pressure in the cross section of the material strand larger voids or by extending the gas pulse width in the direction of the string more extensive cavities are formed.
- the process and one adapted to the material to be processed Device can be used to manufacture profiles Light metal, non-ferrous metal or plastic are used, the method and apparatus according to the requirements of are designed for processing materials.
- FIG. 1 shows an embodiment of a continuous casting device, which is partly shown in section.
- the Position of a feed line 1 from a transport container is marked with an arrow.
- a storage container 2 is for example filled with liquid steel, which by a Heater is kept at temperature.
- At the bottom of the Storage container 2 is a closable, as Funnel-shaped outlet opening that is regulated by a Valve 3 can be opened and closed, whereby level control by means of an ultrasonic sensor 17 is provided.
- the reservoir 2 is of an electromagnetic type Agitator 4 surround so that the liquid steel degassed and can be homogenized.
- the melt is in an under the outlet opening of the storage container 2 arranged vertically Chilled mold 6, which is liquid-cooled.
- the mold 6 is in vertically arranged slide elements attached to the stage 5.
- steel If steel is used as a material, it can melt for example, enter the mold area at around 1400 ° C and after cooling through the mold 6, a temperature of about 800 ° C, at which the melt becomes pasty becomes. Regardless of the temperatures mentioned, as explained later, but mainly on the Area of the melt at which this has a doughy structure shows.
- melt tubes 7 are made of a high temperature resistant Material, such as ceramics, immersed in the a valve block 14 are connected.
- a cooling device is provided in addition to the gas supply 13 If necessary.
- the gas is an inert gas, for example Argon, which has no connection with the steel.
- the Gas is pressure controlled and can so via the valve block 14 can be controlled so that each individual tube 7 is open in time and can be closed and if necessary different pressures can be set.
- the gas pressure must be constantly controlled and regulated that no steel is pushed back into the gas pipes can.
- the gas is supplied through openings in the pipes 7 in an area where the melt is in batter is located, preferably along or near an area of the same Temperature, as shown in Figure 1 by an isotherm I. is.
- the gas bubbles 8 that form can thus be positioned exactly and controllable in their extent, so that in the Material strand predeterminable cavities arise.
- the mold 6 is designed and by means of a vertical guide 12 guided so that a vertical oscillation with a frequency of approx. 1 Hz is possible to prevent caking the melt on the mold wall and on the gas pipes 7 prevent and the introduced gas bubbles 8 better from each other to be able to separate.
- a mounted, additional ultrasonic measuring device 15 enables an assessment of the bladder structure, with a water-cooled Graphite mass can serve as a transmission medium.
- Advantageous is about 2 measuring devices at an angle of 90 ° to each other to arrange a spatial assessment of the generated To be able to make bubble structure.
- the electrical Output signal of the ultrasonic measuring device 15 can be used for control of the valve block 14, for example the one set there Gas pressure and the gas pulse width used there, used to create the desired bubble and cavity structure to create.
- an X-ray device can also be used, to get information about the bubble structure.
- the gas bubbles 8 can be positioned according to the position of the gas pipes 7 and in their vertical and horizontal dimensions and Distribution on the cross section can be controlled.
- the latter can, for example, about the shape of the openings of the gas pipes 7 in connection with a corresponding gas pressure control be accomplished.
- the falling and still externally cooled strand is below the mold 6 by a transport device 11 taken over, which regulated in their speed can be that an optimal process control is possible.
- the strand When the strand has reached the horizontal level, it can be divided, and the separated sections can be used for Further processing can be performed. Below the facility is the drip pan 9 for any escaping liquid material.
- the possible cross-sectional shapes of the material profiles produced range from plate-like structure, rectangular shape, U shape up to the double-T support structure, etc.
- FIGS. 2A, 2B, 3A, 3B, 4A and 4B show the cross-sectional shapes, as described above, with the associated Longitudinal sections, however, the shape of the gas bubbles is variable.
- the entire device is controlled by a process controller regulated that continuous production is possible.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Continuous Casting (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Description
- einem Vorratsbehälter für flüssiges Material, der eine verschließbare, bodenseitige Auslaßöffnung aufweist; und
- einer gekühlten Kokille zum Abkühlen von aus der Auslaßöffnung als Strang austretendem, flüssigem Material,
- die Kokille unterhalb der Auslaßöffnung und im wesentlichen senkrecht angeordnet ist;
- mindestens ein Gasrohr zum Einleiten von Gas vorgesehen ist, und
- das Gasrohr eine Austrittsöffnung hat, die, abhängig von dem verwendeten Material, im Inneren der Kokille in einem Bereich angeordnet ist, in dem der Materialstrang aufgrund der Abkühlung durch die Kokille eine teigige Struktur hat.
- Fig. 1
- eine Ansicht einer Ausführungsform einer Strangguß-Vorrichtung, teilweise im Schnitt;
- Fig. 2A und 2B
- eine Querschnitt- und eine Längsschnitt-Ansicht eines plattenförmigen Material-Profils;
- Fig. 3A und 3B
- eine Querschnitt- und eine Längsschnitt-Ansicht eines U-förmigen Material-Profils; und
- Fig. 4A und 4B
- eine Querschnitt- und eine Längsschnitt-Ansicht eines T-förmigen Material-Profils.
Claims (12)
- Stranggußverfahren zum Herstellen von Material-Profilen, die Hohlräume aufweisen, mit den Schritten:a) Schmelzen des Materials und Bilden eines Strangs aus dem Material;b) Abkühlen oder Abkühlenlassen des Materialstrangs, so daß wenigstens ein Teil des Materialstrangs eine Temperatur aufweist, bei der eine teigige Struktur vorliegt;c) Einleiten von Gas in den Materialstrangteil teigiger Struktur zur Ausbildung der Hohlräume, wobei der Materialstrang von oben nach unten geführt wird; undd) Erstarrenlassen des Materials.
- Verfahren nach Anspruch 1, bei dem als Material metallische Werkstoffe verwendet werden.
- Verfahren nach einem der Ansprüche 1 oder 2, bei dem in Schritt c) das Gas an einer oder mehreren Stellen innerhalb des Materialstrangs eingeleitet wird.
- Verfahren nach Anspruch 3, bei dem, wenn das Gas in Schritt c) an mehreren Stellen innerhalb des Materialstranges eingeleitet wird, diese nahe oder auf einer Isothermenfläche liegen.
- Verfahren nach einem der Ansprüche 1 bis 4, bei dem in Schritt c) als Gas ein Edelgas, beispielsweise Argon, verwendet wird.
- Verfahren nach einem der Ansprüche 1 bis 5, bei dem in Schritt c) das Gas kontinuierlich oder impulsförmig zugeführt wird.
- Verfahren nach einem der Ansprüche 1 bis 6, bei dem die Struktur der erzeugten Hohlräume durch mindestens ein Ultraschallmeßgerät (15) überwacht wird.
- Verfahren nach einem der Ansprüche 1 bis 7, bei dem die Außenhaut des Materialstranges durch Fasern (16) verstärkt wird.
- Strangguß-Vorrichtung zum Herstellen von Material-Profilen, die Hohlräume aufweisen, miteinem Vorratsbehälter (2) für flüssiges Material, der eine verschließbare, bodenseitige Auslaßöffnung aufweist; undeiner gekühlten Kokille (6) zum Abkühlen von aus der Auslaßöffnung als Strang austretendem, flüssigem Material,die Kokille (6) unterhalb der Auslaßöffnung und im wesentlichen senkrecht angeordnet ist;mindestens ein Gasrohr (7) zum Einleiten von Gas vorgesehen ist, unddas Gasrohr (7) eine Austrittsöffnung hat, die, abhängig von dem verwendeten Material, im Inneren der Kokille (6) in einem Bereich angeordnet ist, in dem der Materialstrang aufgrund der Abkühlung durch die Kokille (6) eine teigige Struktur hat.
- Vorrichtung nach Anspruch 9, dadurch gekennzeichnet, daß eine Steuervorrichtung (14) vorgesehen ist, mit der die Gaseinleitung in den Materialstrang in ihrem Betrag und/oder ihrer Form, kontinuierlich oder impulsförmig, gesteuert werden kann.
- Vorrichtung nach Anspruch 9 oder 10, dadurch gekennzeichnet, daß mindestens ein Ultraschallmeßgerät (15) zur Überwachung der Struktur der Hohlräume des ablaufenden Materialstrangs (10) vorgesehen ist.
- Vorrichtung nach Anspruch 11, dadurch gekennzeichnet, daß Signale der Ultraschallmeßgerätes (15), die die Struktur der Hohlräume wiedergeben, der Steuervorrichtung (14) zugeleitet werden.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19730084 | 1997-07-14 | ||
DE19730084 | 1997-07-14 | ||
PCT/EP1998/004348 WO1999004047A1 (de) | 1997-07-14 | 1998-07-13 | Verfahren und anlage zur herstellung von 'leichtstahl' in form von strangguss unter gaseinschluss |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0998589A1 EP0998589A1 (de) | 2000-05-10 |
EP0998589B1 true EP0998589B1 (de) | 2001-10-17 |
Family
ID=7835633
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98939634A Expired - Lifetime EP0998589B1 (de) | 1997-07-14 | 1998-07-13 | Verfahren und anlage zur herstellung von "leichtstahl" in form von strangguss unter gaseinschluss |
Country Status (6)
Country | Link |
---|---|
US (1) | US6263953B1 (de) |
EP (1) | EP0998589B1 (de) |
JP (1) | JP2001510096A (de) |
AT (1) | ATE207131T1 (de) |
DE (1) | DE59801803D1 (de) |
WO (1) | WO1999004047A1 (de) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6682174B2 (en) * | 1998-03-25 | 2004-01-27 | Silverbrook Research Pty Ltd | Ink jet nozzle arrangement configuration |
EP1231287B1 (de) * | 1999-07-09 | 2005-12-07 | Hideo Nakajima | Herstellungsverfahren für poröse metallgegenstände |
DE102006013557B4 (de) * | 2005-03-30 | 2015-09-24 | Alstom Technology Ltd. | Rotor für eine Dampfturbine |
US7594530B1 (en) | 2007-11-19 | 2009-09-29 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Orbital foamed material extruder |
US7807097B1 (en) | 2008-05-19 | 2010-10-05 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Orbital fabrication of aluminum foam and apparatus therefore |
CN106363150A (zh) * | 2016-11-22 | 2017-02-01 | 中冶连铸技术工程有限责任公司 | 一种侧移式连铸坯在线定尺称重装置 |
CN114505457B (zh) * | 2020-11-16 | 2023-08-18 | 鞍钢股份有限公司 | 一种泡沫钢的水平连铸系统及泡沫钢制备工艺 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3941182A (en) | 1971-10-29 | 1976-03-02 | Johan Bjorksten | Continuous process for preparing unidirectionally reinforced metal foam |
CH553606A (de) | 1972-07-27 | 1974-09-13 | Concast Ag | Verfahren und einrichtung zum stranggiessen von metall mit gegenueber dem eingegossenen metall wesentlich geringerem spezifischem stranggewicht. |
JPS5699057A (en) * | 1980-01-11 | 1981-08-10 | Nisshin Steel Co Ltd | Manufacture of continuously casting ingot superior in cleaning ability |
DE3516737A1 (de) | 1985-05-09 | 1986-11-13 | Hoesch Stahl AG, 4600 Dortmund | Verfahren und anlage zum herstellen von mit gasblasen durchsetzten metallischen werkstoffen in form von profilen |
US4898034A (en) * | 1988-08-23 | 1990-02-06 | The United States Of America As Represented By The Department Of Energy | High temperature ultrasonic testing of materials for internal flaws |
EP0587619B1 (de) | 1991-05-31 | 1996-07-10 | Alcan International Limited | Verfahren und vorrichtung zum herstellen profilierter platten aus teilchenstabilisiertem metallschaum |
DE4139020C2 (de) | 1991-11-27 | 1994-02-24 | Pantec Paneltechnik Gmbh | Vorrichtung und Verfahren zur Herstellung eines Metallschaums |
-
1998
- 1998-07-13 US US09/462,741 patent/US6263953B1/en not_active Expired - Fee Related
- 1998-07-13 DE DE59801803T patent/DE59801803D1/de not_active Expired - Fee Related
- 1998-07-13 AT AT98939634T patent/ATE207131T1/de not_active IP Right Cessation
- 1998-07-13 EP EP98939634A patent/EP0998589B1/de not_active Expired - Lifetime
- 1998-07-13 JP JP2000503252A patent/JP2001510096A/ja active Pending
- 1998-07-13 WO PCT/EP1998/004348 patent/WO1999004047A1/de active IP Right Grant
Also Published As
Publication number | Publication date |
---|---|
WO1999004047A1 (de) | 1999-01-28 |
EP0998589A1 (de) | 2000-05-10 |
US6263953B1 (en) | 2001-07-24 |
DE59801803D1 (de) | 2001-11-22 |
JP2001510096A (ja) | 2001-07-31 |
ATE207131T1 (de) | 2001-11-15 |
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