EP0819772B1 - Verfahren zur Kornfeinerung oder Veredelung von Metallegierungen - Google Patents

Verfahren zur Kornfeinerung oder Veredelung von Metallegierungen Download PDF

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Publication number
EP0819772B1
EP0819772B1 EP96810474A EP96810474A EP0819772B1 EP 0819772 B1 EP0819772 B1 EP 0819772B1 EP 96810474 A EP96810474 A EP 96810474A EP 96810474 A EP96810474 A EP 96810474A EP 0819772 B1 EP0819772 B1 EP 0819772B1
Authority
EP
European Patent Office
Prior art keywords
wire
pipe
process according
alloy melt
grain
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
Application number
EP96810474A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0819772A1 (de
Inventor
Walter Hotz
Eric Wuilloud
Hubert Wetzel
Jürgen Hennings
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
3A Composites International AG
Original Assignee
Alusuisse Lonza Services Ltd
Alusuisse Technology and Management Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Alusuisse Lonza Services Ltd, Alusuisse Technology and Management Ltd filed Critical Alusuisse Lonza Services Ltd
Priority to DE59605464T priority Critical patent/DE59605464D1/de
Priority to ES96810474T priority patent/ES2148716T3/es
Priority to AT96810474T priority patent/ATE194017T1/de
Priority to EP96810474A priority patent/EP0819772B1/de
Priority to IS4525A priority patent/IS1906B/is
Priority to NO19973347A priority patent/NO315751B1/no
Publication of EP0819772A1 publication Critical patent/EP0819772A1/de
Application granted granted Critical
Publication of EP0819772B1 publication Critical patent/EP0819772B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/0056—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 using cored wires
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/0006—Adding metallic additives

Definitions

  • the invention relates to a method for grain refinement or Refinement of metal alloys.
  • the scope of the invention also lies an application of the method.
  • metal alloys can a coarse-grained structure occurs, which has lower strength and ductility than fine-grained ones Structure.
  • nucleating additives to the melt a fine-grained structure with better mechanical properties and improved processability can be achieved.
  • the added Agents react in the melt after complex processes and act as foreign germs.
  • Grain refining agent in the form of a grain refining wire Add the alloy melt in the pouring channel in the solid state.
  • a commercially available grain refining wire consists of an aluminum-titanium-boron master alloy with a for example composition Al-5% Ti-1% B.
  • the grain refining wire is the aluminum flowing past first eroded and only melted completely after some time. For this reason, the distribution of the grain-refining Effect producing titanium boride particles in the Melting is not always homogeneous. Remaining titanium boride particles often form agglomerates or accumulate on oxide skins or other impurities and are thus in the Casting formats introduced, which leads to undesirable end products Errors.
  • From US-A-4520861 is a method for alloying continuously cast steel products known at which uses the alloy material in the form of a wire a pipe of the molten steel flowing out of a casting trough is fed. The automatic in the tube melting alloy wire drips from the pipe end into the flowing steel melt.
  • the invention is therefore based on the object of a method of the type mentioned at the beginning, which leads to a more homogeneous distribution of grain refinement or metal finishing agents in the melt and at the same time the agglomeration of grain refinement or Refining particles reduced and the grain refinement or Enhancement efficiency improved.
  • Oxide skinning during the melting of the wire can cause it also from the transition to the liquid state up to the entry into the alloy melt in an oxygen-free atmosphere being held. With this measure, the introduction can of oxide skins in the melt can be effectively reduced.
  • the wire is preferably in an electromagnetic Field heated up to the liquid state and at the same time stirred in the electromagnetic field.
  • the wire can be reinforced in the deagglomerating effect liquid state can also be treated with ultrasound.
  • the wire can be added in the liquid state of metal before dilution in the alloy melt become.
  • Ultrasonic treatment is a homogeneous mixing in reached in a short time.
  • the heating device is preferably an induction coil wrapped around the tube for inductive heating of the wire is.
  • melt Part of the tube can be melted through the alloy flow-through pipe wall provided through openings his.
  • This part of the tube can also be flared End part shaped or as angled in the direction of flow End piece with an upstream into this Inlet funnel to be formed.
  • To reduce the agglomeration of grain refining or Refinement particles can on the tube in the melting range of the Grain refining wire can be arranged in an ultrasound transmitter.
  • the tube at its first open end in one first feed pipe for the grain refining or finishing wire and into a second feed pipe for a metal wire be divided. Both feed pipes are expedient each covered with an induction coil.
  • the method according to the invention for entering a grain refinement or finishing agent in an alloy melt can easily be anywhere in the world Watering gutter can be used.
  • Through the electromagnetic Stirring - if necessary supported by an ultrasound treatment - a high degree of dispersion of grain refinement or Refining particles reached in the melt.
  • oxide skins or other impurities are so small that they are the usual Quality requirements of continuous cast ingots or Press bolts are sufficient so that the insertion device can be used also directly in front of the casting machine, i.e. to metal filtration is possible. With this measure the consumption of grain refining or finishing wire reduce significantly.
  • the alloy melt becomes like the usual one today controlled wire feed controlled.
  • the solid wire that in the tube is pushed in, presses the already melted one Part in the alloy melt in the trough and it melts itself continuously.
  • the inductive Heating supplied energy for melting the wire is of the desired grain refinement or finishing agent addition as well as the actual and target temperature and is controlled accordingly. This can be done, for example the temperature measured by means of a temperature measuring device of the molten wire is used as a control signal become.
  • the method according to the invention can fundamentally refer to all alloy systems and grain refinement or use finishing agents.
  • a particularly preferred one Area of application is grain refinement or refinement of aluminum alloys with a master alloy the base aluminum-titanium-boron, however, others can Grain refining or refining agents of a known type such as e.g. AlSr, AlP or AlCa can be used.
  • An entry device 10 shown in FIG. 1 for entry a grain refining or refining agent in a Aluminum melt comprises a tube 12 made of a heat-resistant Material such as Quartz.
  • a first open end 14 of the Tube 12 serves to introduce a so-called grain refinement or finishing wire 18 with an example Composition Al-5% Ti-1% B.
  • the tube 12 dips with his second open end into a molten metal 20 that is inside a gutter 24 from one in the drawing for reasons the better overview not shown melting furnace to one also not shown in the drawing Casting machine or filter box leads.
  • the tube 12 is immersed in Direction of flow direction x into the molten metal 20 and forms an angle a of with the metal surface 22 for example 60 °.
  • An induction coil 26 is wound around the tube 12. This Induction coil 26 serves on the one hand to melt the Wire 18 and on the other hand causes an electromagnetic Stir the melted wire 18. For support of the stirring effect and for the destruction of any still existing Agglomerates of grain refining or refining particles is on tube 12 in the area of the melted wire 18 an ultrasonic transmitter 28 is arranged.
  • openings 34 in on its upstream side the pipe wall provided in the area of the part immersed in the molten metal 20 of the tube 12 .
  • the through the openings 34 in the inside of the tube 12 flowing melt leads to a Predilution of the melted wire 18 before it the melt 20 in the trough 24 in the form of discrete Grain refinement or refining particles 19 is supplied.
  • One in the interior of the tube 12 in the melted area of the grain refining wire 18 introduced temperature measuring device 32 can be used to control the heating power of the induction coil 26 are used.
  • FIG. 3 Another entry device 50 shown in FIG. 3 has a central pipe section 52, in which on a at its ends two feed pipes 54, 56 open.
  • the first Feed pipe 54 is used to feed a grain refining or. Finishing wire 58, e.g. Al-5% Ti-1% B, the second Feed pipe 56 for feeding an aluminum wire 60.
  • Both feed pipes 54, 56 and the one connected to them Part of the central tube section 52 are with induction coils 62, 64, 66 wrapped.
  • these serve for melting the grain refining or finishing wire 58 and of the aluminum wire 60 and, on the other hand, cause the stirring effect is an intensive mixing of the melted Areas of the grain refining or finishing wire 58 and the aluminum wire 60.
  • the stirring effect also reduces the formation of agglomerates from grain refinement or refining particles or causes comminution any agglomerates present.
  • the end of the central immersed in the molten metal 20 Pipe section 52 is the end piece 74 in the flow direction x Metal melt 20 angled.
  • an inlet funnel 78 At the transition from the central Pipe section 52 opens into the angled end piece 74 upstream to the end piece 74 an inlet funnel 78.
  • the through molten metal 20 flowing through this inlet funnel 78 mixes intensively with the already prediluted Wire 58 from the central tube 52 and thus causes another Predilution.
  • the selected arrangement of the inlet funnel 78 and end piece 74 acts in the manner of a Venturi tube and leads to a strong swirl in the end piece 74, the by an induction coil 76 arranged around the end piece 74 can still be reinforced.
  • an ultrasound transmitter 68 for inert gas
  • a supply nozzle 70 for inert gas for inert gas
  • a temperature measuring device 72 for power control of the various induction coils arranged.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Cereal-Derived Products (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
EP96810474A 1996-07-19 1996-07-19 Verfahren zur Kornfeinerung oder Veredelung von Metallegierungen Expired - Lifetime EP0819772B1 (de)

Priority Applications (6)

Application Number Priority Date Filing Date Title
DE59605464T DE59605464D1 (de) 1996-07-19 1996-07-19 Verfahren zur Kornfeinerung oder Veredelung von Metallegierungen
ES96810474T ES2148716T3 (es) 1996-07-19 1996-07-19 Procedimiento de afino del grano o de acabado de aleaciones metalicas.
AT96810474T ATE194017T1 (de) 1996-07-19 1996-07-19 Verfahren zur kornfeinerung oder veredelung von metallegierungen
EP96810474A EP0819772B1 (de) 1996-07-19 1996-07-19 Verfahren zur Kornfeinerung oder Veredelung von Metallegierungen
IS4525A IS1906B (is) 1996-07-19 1997-07-15 Aðferð til kornahreinsunar og melmisblöndunar á melmi
NO19973347A NO315751B1 (no) 1996-07-19 1997-07-18 Anordning for kornforfining eller foredling av legering

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP96810474A EP0819772B1 (de) 1996-07-19 1996-07-19 Verfahren zur Kornfeinerung oder Veredelung von Metallegierungen

Publications (2)

Publication Number Publication Date
EP0819772A1 EP0819772A1 (de) 1998-01-21
EP0819772B1 true EP0819772B1 (de) 2000-06-21

Family

ID=8225656

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96810474A Expired - Lifetime EP0819772B1 (de) 1996-07-19 1996-07-19 Verfahren zur Kornfeinerung oder Veredelung von Metallegierungen

Country Status (6)

Country Link
EP (1) EP0819772B1 (is)
AT (1) ATE194017T1 (is)
DE (1) DE59605464D1 (is)
ES (1) ES2148716T3 (is)
IS (1) IS1906B (is)
NO (1) NO315751B1 (is)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2702522C2 (ru) * 2014-11-05 2019-10-08 Констеллиум Иссуар Способ использования трубчатого сонотрода
CN110976786A (zh) * 2019-12-02 2020-04-10 中信戴卡股份有限公司 一种铝合金液导流装置及导流方法
CN115786833B (zh) * 2022-11-15 2024-02-09 西北工业大学 一种强磁场处理细化钛铝合金显微组织的方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3836360A (en) * 1972-07-10 1974-09-17 Anaconda Co Method and apparatus for pre-heating and adding master alloy to a copper melt
GB1431123A (en) * 1973-08-22 1976-04-07 Stein Refractories Metallurgical lances
US4057420A (en) * 1976-02-06 1977-11-08 Airco, Inc. Methods for dissolving volatile addition agents in molten metal
DE2634282C2 (de) * 1976-07-28 1978-04-13 Mannesmann Ag, 4000 Duesseldorf Verfahren zum kontinuierlichen Einbringen von Zusatzmitteln in ein mit flüssigem Metall gefülltes Gefäß
US4520861A (en) * 1983-11-18 1985-06-04 Republic Steel Corporation Method and apparatus for alloying continuously cast steel products
WO1993022085A1 (en) * 1992-04-24 1993-11-11 Nippon Steel Corporation Method of obtaining double-layered cast piece

Also Published As

Publication number Publication date
NO973347D0 (no) 1997-07-18
DE59605464D1 (de) 2000-07-27
ATE194017T1 (de) 2000-07-15
EP0819772A1 (de) 1998-01-21
IS1906B (is) 2003-12-16
NO315751B1 (no) 2003-10-20
IS4525A (is) 1998-01-20
NO973347L (no) 1998-01-20
ES2148716T3 (es) 2000-10-16

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