EP1344589B1 - Verfahren und Vorrichtung zum Aufbereiten einer Schmelze einer Legierung für einen Giessvorgang - Google Patents

Verfahren und Vorrichtung zum Aufbereiten einer Schmelze einer Legierung für einen Giessvorgang Download PDF

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Publication number
EP1344589B1
EP1344589B1 EP03003899A EP03003899A EP1344589B1 EP 1344589 B1 EP1344589 B1 EP 1344589B1 EP 03003899 A EP03003899 A EP 03003899A EP 03003899 A EP03003899 A EP 03003899A EP 1344589 B1 EP1344589 B1 EP 1344589B1
Authority
EP
European Patent Office
Prior art keywords
melt
alloy
crystallisation vessel
vessel
inlet
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
EP03003899A
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German (de)
English (en)
French (fr)
Other versions
EP1344589A2 (de
EP1344589A3 (de
Inventor
Evgenij Dr. Sterling
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.)
Individual
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Individual
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.)
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Publication date
Application filed by Individual filed Critical Individual
Priority to SI200331339T priority Critical patent/SI1344589T1/sl
Publication of EP1344589A2 publication Critical patent/EP1344589A2/de
Publication of EP1344589A3 publication Critical patent/EP1344589A3/de
Application granted granted Critical
Publication of EP1344589B1 publication Critical patent/EP1344589B1/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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/007—Semi-solid pressure die casting
    • 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
    • C22C1/12—Making non-ferrous alloys by processing in a semi-solid state, e.g. holding the alloy in the solid-liquid phase

Definitions

  • the invention relates to a method and an apparatus for processing a melt of an alloy for a casting process which is brought into a partially solidified state and contains crystallization seeds distributed over its volume.
  • the object of the invention is to prepare a melt of an alloy in such a way that the distribution of the crystallization nuclei over the volume of the melt is as fine and homogeneous as possible before it is introduced into a casting mold.
  • This object is achieved by bringing the melt, which has a temperature above the melting temperature of the alloy, into a crystallization vessel heated to a temperature below the melting temperature, adding this melt in the crystallization vessel alloy as powder, and by means of electrical and / or magnetic forces melt and powder in the crystallization vessel are mixed together.
  • the pulverulent particles of the alloy which are immediately enveloped by the melt, form crystallization nuclei, which by means of the electrical and / or magnetic forces are distributed homogeneously within the melt.
  • the melt is introduced as a jet into the crystallization vessel, which extends between two electrodes, to which an electrical voltage is applied. Due to the so-called pinch effect of the jet is narrowed and compressed, which is already partially split during inflow into individual, liquid droplets.
  • the crystallization vessel is thus not filled with a compact jet, but with a dispersed jet.
  • the surface of the melt volume increases significantly, with a degassing takes place.
  • a magnetic field is formed in the crystallization vessel.
  • the magnetic field and the electric field act differently on the melt and the particles therein, so that the mixing effect is promoted.
  • melt is sucked into the set under reduced pressure crystallization vessel.
  • the inflowing jet of melt further dispersed and dissolves into individual drops. This also promotes the formation of nuclei.
  • the melt is supplied to the crystallization vessel with the supply of inert gas.
  • the shielding gas when the shielding gas is supplied under pressure, the process is further improved.
  • the shielding gas prevents chemical reactions of the alloy with the atmosphere, which could adversely affect the subsequent casting process.
  • a crystallization vessel having a melt inlet and a powdered alloy inlet having a heater and provided with electrodes applied to a voltage source in the region of its bottom and inlet.
  • a melt 11 of a metal alloy for example AlSi 9, is maintained at a temperature which is above the melting temperature of this alloy.
  • the oven 10 is closed in a vacuum-tight manner and kept under vacuum by means of a suction device 12.
  • the furnace 10 is connected via a pouring line 13 with a crystallization vessel 14.
  • the crystallization vessel 14 consists of a cylinder 15 of electrically non-conductive material, which has a thermal conductivity between 0.20 and 1.5W / mk.
  • the cylinder 15 is closed at the top with a lid 16, which also consists of electrically non-conductive material.
  • the line 13 connects.
  • the lid is connected to an inlet piece 17 made of electrically conductive material.
  • the inlet piece 17 has a conically widening inlet opening.
  • the lid 16 is followed by a suction line 18, which is connected to an exhaust 19.
  • the lid 16 is further provided with a filler neck 20 through which alloy powder can be introduced into the crystallization vessel 14.
  • a piston 21 which also consists of an electrically non-conductive material.
  • the piston 21 is guided in a subsequent to the crystallization vessel 14 cylinder 22, which is provided with a discharge opening, not shown.
  • the cylinder 15 of the crystallization tank 14 is provided with an electrode 23 in the region of its bottom.
  • the inlet piece 17 is made of electrically conductive material. Between the electrode 23 and the inlet piece 17, a voltage source 24 is arranged, the voltage and above all the current strength of which is adjustable by means of an adjusting device 25.
  • the crystallization vessel 14 is associated with a preferably electric heater 26, which is preferably adjustable and which heats the crystallization vessel 14 at a preselectable temperature and holds at this temperature. Furthermore, the crystallization container 14 is associated with a magnetic coil 27, with which in the interior of the cylinder 15 of the crystallization vessel 14, a magnetic field is buildable.
  • the pouring channel 13 is equipped with a gate valve 28, via which the connection between the furnace 19 and the crystallization vessel 14 can be released and shut off.
  • a supply line 29 connects, via which protective gas can be supplied with excess pressure, for example argon.
  • melt 11 is first introduced into the furnace 10.
  • the furnace 10 is brought by means of the suction 12 to a vacuum of 0.5 mbar to 3 mbar.
  • the crystallization vessel 14 is heated by means of the heater 26 to a temperature which is 3% to 50% lower than the melting temperature of the alloy in question.
  • a vacuum is generated by the suction 19, which is stronger than the vacuum in the furnace 10th
  • melt 11 is sucked into the crystallization tank 14.
  • protective gas is supplied via the line 29. Due to the suction effect, alloy in powder form is also sucked in via the inlet connection 20. The powder is enclosed in the melt and distributed.
  • a voltage is applied to the electrode 23 and the inlet piece 17 so that a current whose size is less than 10 A flows in the jet of the melt.
  • To a homogeneously dispersed mixture To obtain a magnetic field is generated by means of the magnetic coil 27 in the interior of the crystallization vessel 14, which leads to a radial movement of the melt.
  • the circuit is first interrupted. Now the voltage is increased to values of 150V to 400V, so that an arc is ignited, in which a current with a strength up to 1300A can flow.
  • the electromagnetic field generated by the magnetic coil 27 is varied and continuously increased, for example, in the direction of filling.
  • the piston 21 is lowered, so that the melt flows out through the cylinder and its discharge opening and is processed further in a suitable manner. All known casting methods can be used.
  • the electrode 23 is integrated in the piston 21, which forms the bottom of the crystallization vessel 14.
  • the voltage source 24 is connected to two electrodes 30 and 31 of the cylinder 15 of the crystallization vessel 14.
  • the second connection is made to the pouring channel 13.
  • the piston 21 moves during the filling of the melt continuously down, then successively the electrodes 30 and 31 are used, which with the piston movement via switches 32 and 33 and be switched off.
  • the melt prepared in the crystallization vessel 14 is transferred to a storage or transport container 34 in which it is in the processed state is held.
  • This container 34 is provided with a suction 35, so that a negative pressure can be applied to it. It is provided with a heater 36 and a solenoid 37. Likewise, it is equipped with an electrode 38.
  • the two end walls of the container 34 are formed by pistons 39 and 40.
  • the container 34 can also be used for shaping.
  • the nomogram shown can predict the thermokinetic sequence.
  • the nomogram shown applies to the alloy AlSi9Cu 3 .
  • the amount of powdered alloy added with a grain size of about 125 microns to about 400 microns is applied in proportions by weight.
  • the temperature difference ⁇ T in [C °] is the difference between the casting temperature and the melting temperature of the alloy. If an amount of powdery alloy is added, which is in the nomogram region A, this causes only a reduction of the temperature of the melt. The melt is thus placed in a semi-solid state without the powdery particles forming nuclei. However, when an amount of powdered alloy is added to reach the nomogram region B, the powdery particles function as additional, unmelted nuclei. If the addition of powdered particles in the nomogram region C, the two processes will run side by side, ie a reduction of the superheat temperature and nucleation due to unmelted particles.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Furnace Details (AREA)
  • General Induction Heating (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Hard Magnetic Materials (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
EP03003899A 2002-03-13 2003-02-21 Verfahren und Vorrichtung zum Aufbereiten einer Schmelze einer Legierung für einen Giessvorgang Expired - Lifetime EP1344589B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI200331339T SI1344589T1 (sl) 2002-03-13 2003-02-21 Postopek in priprava za pripravo taline zlitine za postopek ulivanja

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10212349A DE10212349C1 (de) 2002-03-13 2002-03-13 Verfahren und Vorrichtung zum Aufbereiten einer Schmelze einer Legierung für einen Giessvorgang
DE10212349 2002-03-13

Publications (3)

Publication Number Publication Date
EP1344589A2 EP1344589A2 (de) 2003-09-17
EP1344589A3 EP1344589A3 (de) 2005-05-18
EP1344589B1 true EP1344589B1 (de) 2008-06-04

Family

ID=7714155

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03003899A Expired - Lifetime EP1344589B1 (de) 2002-03-13 2003-02-21 Verfahren und Vorrichtung zum Aufbereiten einer Schmelze einer Legierung für einen Giessvorgang

Country Status (16)

Country Link
US (1) US6988529B2 (no)
EP (1) EP1344589B1 (no)
JP (1) JP4541650B2 (no)
KR (1) KR100995490B1 (no)
CN (1) CN1275725C (no)
AT (1) ATE397503T1 (no)
AU (1) AU2003200990B2 (no)
BR (1) BR0300491B1 (no)
CA (1) CA2420931C (no)
DE (2) DE10212349C1 (no)
DK (1) DK1344589T3 (no)
ES (1) ES2307838T3 (no)
MX (1) MXPA03002089A (no)
NO (1) NO20031112L (no)
PT (1) PT1344589E (no)
SI (1) SI1344589T1 (no)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050103461A1 (en) * 2003-11-19 2005-05-19 Tht Presses, Inc. Process for generating a semi-solid slurry
CN102133629A (zh) * 2011-03-01 2011-07-27 大连理工大学 一种轻合金电磁悬浮铸造装置和方法
WO2013065378A1 (ja) * 2011-11-02 2013-05-10 大亜真空株式会社 アーク溶解炉装置及び被溶解物のアーク溶解方法
CN102794432A (zh) * 2012-07-24 2012-11-28 江苏万里活塞轴瓦有限公司 铝合金半固态浆料制备装置
JP6171216B2 (ja) * 2013-05-09 2017-08-02 東芝機械株式会社 半凝固金属の製造装置、半凝固金属の製造方法及び半凝固金属を用いた成形方法
CN109351916B (zh) * 2018-07-31 2021-03-12 湖南人文科技学院 一种高硼合金的制备方法
CN109261940A (zh) * 2018-09-28 2019-01-25 平顶山学院 一种金属材料增材制造成型方法及装置
CN110538587B (zh) * 2019-09-12 2022-03-08 福建省鼎智新材料科技有限公司 一种基于气体搅拌的喷粉半固态制浆装置及其工作方法

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3813469A (en) * 1973-04-09 1974-05-28 Daido Steel Co Ltd Method for heating vacuum degassing container
FR2275560A1 (fr) * 1974-06-21 1976-01-16 Anvar Perfectionnements au degazage des metaux liquides, notamment de l'acier liquide, par jet sous vide
US4108643A (en) * 1976-09-22 1978-08-22 Massachusetts Institute Of Technology Method for forming high fraction solid metal compositions and composition therefor
GB2037634B (en) * 1978-11-27 1983-02-09 Secretary Industry Brit Casting thixotropic material
JPS5732859A (en) * 1980-08-06 1982-02-22 Nippon Steel Corp Method and device for removing foreign substance from molten metal
JPS57127555A (en) * 1981-01-29 1982-08-07 Nippon Kokan Kk <Nkk> Method for horizontal continuous casting of steel
US4482012A (en) * 1982-06-01 1984-11-13 International Telephone And Telegraph Corporation Process and apparatus for continuous slurry casting
US4709746A (en) * 1982-06-01 1987-12-01 Alumax, Inc. Process and apparatus for continuous slurry casting
JPS63273553A (ja) * 1987-04-30 1988-11-10 Furukawa Alum Co Ltd 中空ビレツトの製造方法および装置
JPH01306047A (ja) * 1988-05-31 1989-12-11 Nkk Corp 半溶融金属の製造方法
JPH01309766A (ja) * 1988-06-09 1989-12-14 Furukawa Electric Co Ltd:The 鋳塊の製造方法とその装置
US5178204A (en) * 1990-12-10 1993-01-12 Kelly James E Method and apparatus for rheocasting
US5379828A (en) 1990-12-10 1995-01-10 Inland Steel Company Apparatus and method for continuous casting of molten steel
US5494095A (en) 1992-04-08 1996-02-27 Inland Steel Company Apparatus for continuous casting of molten steel
JPH08290257A (ja) * 1995-04-20 1996-11-05 Mitsubishi Heavy Ind Ltd 耐摩耗性アルミニウム合金鋳物及びその製造法
IT1279642B1 (it) * 1995-10-05 1997-12-16 Reynolds Wheels Spa Metodo e dispositivo per la formatura tixotropica di prodotti in lega metallica
JP3236508B2 (ja) * 1996-06-25 2001-12-10 トヨタ自動車株式会社 金属溶湯供給装置
US5887640A (en) * 1996-10-04 1999-03-30 Semi-Solid Technologies Inc. Apparatus and method for semi-solid material production
DE10002670C2 (de) * 2000-01-24 2003-03-20 Ritter Aluminium Giesserei Gmb Druckgießverfahren und Vorrichtung zu seiner Durchführung

Also Published As

Publication number Publication date
DE10212349C1 (de) 2003-08-28
BR0300491B1 (pt) 2012-02-07
EP1344589A2 (de) 2003-09-17
ATE397503T1 (de) 2008-06-15
BR0300491A (pt) 2004-08-17
AU2003200990A1 (en) 2003-10-02
PT1344589E (pt) 2008-08-13
EP1344589A3 (de) 2005-05-18
US20040003912A1 (en) 2004-01-08
AU2003200990B2 (en) 2008-05-22
CN1443615A (zh) 2003-09-24
JP2004025302A (ja) 2004-01-29
CA2420931C (en) 2011-05-03
SI1344589T1 (sl) 2008-10-31
US6988529B2 (en) 2006-01-24
NO20031112D0 (no) 2003-03-11
CA2420931A1 (en) 2003-09-13
DE50309939D1 (de) 2008-07-17
KR100995490B1 (ko) 2010-11-19
MXPA03002089A (es) 2004-08-11
KR20030074297A (ko) 2003-09-19
ES2307838T3 (es) 2008-12-01
JP4541650B2 (ja) 2010-09-08
NO20031112L (no) 2003-09-15
DK1344589T3 (da) 2008-10-13
CN1275725C (zh) 2006-09-20

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