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WO2011027930A1 - Dispositif de fusion sous vide pour métaux légers employant un brassage électromagnétique, et procédé de fusion sous vide l'employant - Google Patents

Dispositif de fusion sous vide pour métaux légers employant un brassage électromagnétique, et procédé de fusion sous vide l'employant Download PDF

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Publication number
WO2011027930A1
WO2011027930A1 PCT/KR2009/005486 KR2009005486W WO2011027930A1 WO 2011027930 A1 WO2011027930 A1 WO 2011027930A1 KR 2009005486 W KR2009005486 W KR 2009005486W WO 2011027930 A1 WO2011027930 A1 WO 2011027930A1
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WO
WIPO (PCT)
Prior art keywords
vacuum
vacuum melting
molten metal
melting
melting chamber
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.)
Ceased
Application number
PCT/KR2009/005486
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English (en)
Korean (ko)
Inventor
고동근
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.)
NTT Korea Co Ltd
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NTT Korea Co 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 NTT Korea Co Ltd filed Critical NTT Korea Co Ltd
Publication of WO2011027930A1 publication Critical patent/WO2011027930A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B14/00—Crucible or pot furnaces
    • F27B14/04—Crucible or pot furnaces adapted for treating the charge in vacuum or special atmosphere
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
    • F27B5/04—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated adapted for treating the charge in vacuum or special atmosphere
    • 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
    • C21C7/10—Handling in a vacuum
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
    • C22B9/04—Refining by applying a vacuum
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B14/00—Crucible or pot furnaces
    • F27B14/06—Crucible or pot furnaces heated electrically, e.g. induction crucible furnaces with or without any other source of heat

Definitions

  • the present invention relates to a vacuum melting apparatus using electron stirring and a vacuum melting method thereof. More particularly, the composition of the molten metal is melted by melting the light metal raw material by a heating unit in a high vacuum state, and by stirring it by an electron stirring unit.
  • the present invention relates to a light metal vacuum melting apparatus using electron stirring and a vacuum melting method using the same, which improves uniformity, improves melting efficiency, gas (bubble) removing efficiency, and the like, thereby producing high quality molten metal.
  • light metals are lighter in weight than titanium (specific gravity 4.5), and typically beryllium (specific gravity 1.85), magnesium (1.74), aluminum (2.7), titanium (4.5), and the like.
  • specific gravity 4.5 titanium
  • beryllium specific gravity 1.85
  • magnesium (1.74)
  • aluminum 2.7
  • titanium titanium
  • titanium is widely used in aircraft materials.
  • alkali metals (1 or less) such as silicon (2.3), yttrium (4.3), sodium, potassium, lithium, etc.
  • alkaline earth metals such as calcium (1.5) also enter the light metal, but in general, the light metal Point out the four metals listed above as the material.
  • magnesium is the eighth most abundant element, accounting for about 2.7% of the planet.
  • Magnesium alloy has a specific gravity of 1.79 ⁇ 1.81, which is light and has a weight reduction effect of about 70% compared to steel, and is applied to a wide range of fields due to its excellent strength, castability, machinability, electromagnetic shielding ability, vibration and shock absorption ability. Its usage is increasing rapidly.
  • a die casting method is mainly used, and the die casting method includes a hot chamber, a cold chamber, thixomolding, and the like.
  • the mold casting machine and the light metal melting furnace are separately configured, and the molten molten metal is poured into the injection sleeve of the mold casting machine, and the molten metal is pressed by an injection plunger and injected into the mold.
  • the hot chamber method is a method in which an injection cylinder is installed in a melting furnace and pressurized so that a high temperature molten metal flows into a mold.
  • the thixomolding method is a combination of the conventional injection molding method and the metal die casting method, and uses light metal raw materials in the form of chips such as resin injection.
  • magnesium when used as the raw material for the die casting method, it is ignited when it is melted in the air. Therefore, measures to prevent oxidation of the molten metal are necessary. Therefore, when the magnesium alloy is melted, a large amount of flame retardant flux (SF 6 + CO 2 mixed gas) or inert gas is injected into the melting furnace. It is regulated. In addition, since the price is also rising, the melting of magnesium alloy by the die casting method has a relatively high production cost in terms of production cost and causes air pollution.
  • flame retardant flux SF 6 + CO 2 mixed gas
  • thixomolding stores raw materials in the form of chips in a hopper, feeds magnesium alloy chips into cylinders, moves them forward by the rotation of the screw, and simultaneously heats them into a slurry phase having a predetermined solid phase rate.
  • the slurry is filled in the molding part of the mold by the fast forward motion of the screw.
  • raw materials in the form of chips are quite expensive, and scraps (molding defects, runners, gates) generated during metal forming are also impossible to reuse, which results in high raw materials.
  • the present invention has been made in view of the above, and the composition of the molten metal is made uniform by melting the light metal raw materials by the heating unit in a high vacuum state and by stirring the electrons by the electron stirring unit, and melting efficiency and gas ( It is an object of the present invention to provide a light metal vacuum melting apparatus using an electron stirring and a vacuum melting method using the same, which can improve bubble removal efficiency and generate high quality molten metal.
  • Vacuum melting apparatus of the present invention for achieving the above object
  • Vacuum melting chamber provided with an air discharge pipe on the upper side;
  • a first material input pipe connected to one side of the vacuum melting chamber and communicatively connected to one side of the vacuum melting chamber;
  • a second material introduction tube connected between the first material introduction tube and the vacuum melting chamber
  • a heating unit for melting installed on an outer side of the vacuum melting chamber
  • An electronic stirring unit installed outside the heating unit for melting and having a spiral coil embedded therein;
  • First and second vacuum valves installed at both ends of the first material input pipe
  • a first molten metal heat insulating tube communicating with the other side of the vacuum melting chamber
  • the heating unit for melting is disposed on the lower outer peripheral surface of the vacuum melting chamber, the heating unit for thermal insulation is disposed on the outer peripheral surfaces of the first and second molten metal insulation tube.
  • a material input support is disposed at the rear of the second vacuum valve, and a charge plunger is installed at the rear of the material input support so as to move forward and backward.
  • the first and second vacuum valves are provided with a valve housing, a drive cylinder installed at an upper end of the valve housing, an operating rod vertically operated by the drive cylinder, and a valve body provided at an end of the operating rod, respectively.
  • the valve element of the second vacuum valve has a plug hole at one side thereof, and is configured such that a charging plunger is inserted into the plug hole.
  • a molten metal valve cylinder is installed at an upper end of the second molten metal heat insulating tube, and an operating rod vertically operated by the molten metal valve cylinder and a molten valve body installed at an end of the operating rod are installed inside the second molten metal heat insulating tube.
  • the charging plunger is advanced again to close the plug hole of the second vacuum valve, and then open the air discharge pipe on one side of the first material input pipe to open the inside of the first material input pipe.
  • the space is formed in a vacuum state, and the vacuum degree of the material introduction pipe is the same as that of the vacuum melting chamber, the first and second molten metal insulation tubes, the first vacuum valve is opened, and the charging plunger is advanced to light metal.
  • the predetermined amount of molten metal is stored and stored in the vacuum melting chamber, the first and second molten metal insulation tubes by repeating the preparing of the light metal raw material (S1), the filling of the light metal raw material (S2), and the melting of the light metal raw material (S3). Characterized in that.
  • the molten metal is characterized in that it is kept at a temperature of about 10 ⁇ 200 °C lower than the melting point of the light metal raw materials.
  • the first and second material injection pipes can be fed into the light metal raw material in a high vacuum state by a plurality of vacuum valves on the outside of the vacuum melting chamber, and vacuum melting operation in the vacuum melting chamber is very high. There is an advantage that is made smoothly.
  • the present invention by disposing a heating unit on the outside of the vacuum melting chamber, an electronic stirring unit on the outside of the heating unit to significantly improve the dissolution efficiency of light metal raw materials and to significantly improve the degassing effect and light metal alloy There is an advantage that the composition of the molten metal becomes uniform.
  • FIG. 1 is a partial cutaway perspective view showing a vacuum melting apparatus of a light metal according to an embodiment of the present invention.
  • 2 to 4 is a view showing a step of preparing a light metal raw material according to the present invention.
  • 5 to 10 is a view showing a charging step of the light metal raw material according to the present invention.
  • FIG. 11 is a view showing a melting step of light metal raw materials according to the present invention.
  • FIG. 12 is a view showing a step of keeping the molten metal according to the present invention.
  • FIG. 13 and 14 are views showing the tapping step of the molten metal according to the present invention.
  • FIG. 1 is a partial cutaway perspective view showing a light metal vacuum melting apparatus according to an embodiment of the present invention.
  • the light metal vacuum melting apparatus is a vacuum melting chamber 10, the first material input pipe 40, the first material input pipe (40) which is communicatively connected to one side of the vacuum melting chamber 10 ( 40 and the first and second vacuum valves 30 and 50 respectively installed at both ends of the first material introduction pipe 40 and the first material introduction pipe 40 connected between the vacuum melting chamber 10 and the vacuum melting.
  • the first molten metal heat insulating tube 70 communicated with the other side of the chamber 10, and the second molten metal heat insulating tube 80 communicating with the first molten metal heat insulating tube 70.
  • a molten metal is accommodated therein, and an air discharge pipe 11 is provided on an upper side thereof, and an air discharge valve is installed in the air discharge pipe 11. Through the air discharge valve and the air discharge pipe 11, the interior of the vacuum melting chamber 10 is in a vacuum state.
  • a melting heating unit 15 is disposed on the outer circumferential surface of the vacuum melting chamber 10, in particular, a lower outer circumferential surface, and the melting heating unit 15 is a kind of electric heating device, and a light metal raw material introduced into the vacuum melting chamber 10. It is configured to apply a predetermined heat to melt (1).
  • the electromagnetic stirring unit 16 is disposed outside the heating unit 15 for melting, and is provided with a spiral coil 16a therein to generate an electromagnetic field as electricity is applied to the coil 16a side. It is composed.
  • One side of the vacuum melting chamber 10 is connected to the first material input pipe 40 in communication with each other, the second material input pipe 42 between the first material input pipe 40 and the vacuum melting chamber 10 is Connected.
  • One end of the second material introduction pipe 42 is directly connected to one side of the vacuum melting chamber 10, and the other end of the second material introduction pipe 42 is connected to the first material introduction pipe 40. .
  • a flange 42a is formed at the other end of the second material introduction pipe 42, and the flange 42a is sealingly coupled to one side of the valve housing 33 of the first vacuum valve 30.
  • the light metal raw material 1 is introduced into the inner space of the first material input pipe 40 and the second material input pipe 42, and an air discharge pipe 41 is installed at one side of the first material input pipe 40.
  • the air discharge valve 41 is provided with an air discharge valve.
  • First and second vacuum valves 30 and 50 are installed at both ends of the first material input pipe 40, respectively, and the air discharge pipe 41 and the first and second vacuum valves 30 and 50 may be operated together. As a result, the internal space of the material introduction pipe 40 is in a vacuum state.
  • Flanges 40a and 40b are formed at both ends of the first material input pipe 40, respectively, and the first and second vacuum valves 30 and 50 are individually sealed to the flange of the first material input pipe 40. do.
  • the first vacuum valve 30 is the valve housing 33, the driving cylinder 35 installed on the upper end of the valve housing 33, the operation rod 34 which is operated up and down by the driving cylinder 35, the operation rod 34
  • the valve body 31 provided in the edge part is provided.
  • Both sides of the valve housing 33 are sealingly coupled to the other end flange 42a of the second material input pipe 42 and one end flange 40a of the first material input pipe 40, respectively.
  • the operation rod 34 is operated up and down, and the valve body 31 is operated by the operation of the operation rod 34 up and down by the other material input pipe 42.
  • the stage and one end of the first material input pipe 40 are opened and closed.
  • the second vacuum valve 50 includes a valve housing 53, a driving cylinder 55 installed at an upper end of the valve housing 53, an operation rod 54 operating up and down by the driving cylinder 55, and an operation rod 54.
  • the valve body 51 provided in the edge part is provided.
  • the other end flange 40b of the first material input pipe 40 is sealingly coupled to the valve housing 53.
  • the operation rod 54 is operated up and down, and the valve body 51 is connected to the other end of the first material input pipe 40 by the operation of the operation rod 54 up and down. Open and close
  • the valve body 51 has a plug hole 51a on one side thereof, and is configured such that the charging plunger 60 is inserted into the plug hole 51a. Accordingly, even when the valve body 51 of the second vacuum valve 50 closes the other end of the first material injection pipe 40, the charging plunger 60 can move forward while penetrating the plug hole 51a. By the forward operation of the charging plunger 60, the light metal raw material 1 can be charged into the vacuum melting chamber 10.
  • a material input support 66 is disposed behind the second vacuum valve 50, and the material input support 66 has an arc-shaped cross section.
  • a charging plunger 60 is installed at the rear of the material input support 66 so as to be able to move back and forth.
  • a light metal raw material 1 in a solid state is located, and the light metal raw material 1 is connected to the first material input pipe 40 and the second material input pipe 42 by the charging plunger 60. You can move inside.
  • the other side of the vacuum melting chamber 10 is inclinedly communicated with the first molten metal insulation tube 70 at a predetermined angle, and the second molten metal insulation tube 80 is obliquely communicated with the first molten metal insulation tube 70 at a predetermined angle.
  • a molten valve cylinder 90 is installed at an upper end of the second molten metal heat insulating tube 80, and an operating rod 91 and an upper and lower operation operated by the molten valve cylinder 90 are operated inside the second molten metal heat insulating tube 80.
  • the molten valve body 85 provided in the edge part of the rod 91 is provided.
  • the hydraulic rod or the pneumatic pressure is applied to the molten valve cylinder 90, the operation rod 91 is operated up and down, and the molten valve body 85 is configured to open and close the injection hole of the second molten metal insulation tube (80). .
  • an insulating heating unit 75 may be disposed on the outer circumferential surfaces of the first and second molten metal insulating tubes 70 and 80, and the insulating heating unit 75 is a kind of electrical heating device. 2 It is configured to prevent the solidification of the molten metal and to keep warm by applying a predetermined heat to the molten heat insulating tube (70, 80) side.
  • the mold casting machine of various structures is connected to the injection hole of the second molten metal heat insulating tube 80, and the die casting machine of the present invention is a die casting machine (patent registration No. 10-0578257) and a vertical vacuum squeeze casting machine (patent of the present invention). 10-0572583), vertical vacuum forging machine (Patent No. 10-0572589), vacuum gravity mold casting machine (Patent No. 10-0572581) and the like may be referred to.
  • the vacuum melting chamber 10 is opened by opening the air discharge valve of the air discharge pipe 11. ), The second material injection tube 42, the first and the second molten metal insulation tube (70, 80) inside to form a vacuum. Then, the light metal raw material 1 is placed in the material input support 66.
  • the second vacuum valve 50 is opened as shown in FIG. 3, and the charging plunger 60 is advanced as shown in FIG. 4 to push the light metal raw material 1 into the first material input pipe 40.
  • the second vacuum valve 50 is closed and operated as shown in FIG. 6, and then the charging plunger 60 is advanced again to the plug hole 51a of the valve body 51. Insert it.
  • the charging plunger 60 closes the plug hole 51a of the valve body 51.
  • the air discharge valve of the air discharge pipe 41 is opened to form the internal space of the first material input pipe 40 in a vacuum state.
  • the air discharge valve of the air discharge pipe 41 is closed, and the first vacuum valve 30 is opened.
  • the charging plunger 60 is advanced as shown in FIG. 8 to charge the light metal raw material 1 into the vacuum melting chamber 10, and the charging plunger 60 is reversed as shown in FIG. 9 and the first vacuum valve ( 30) close. At this time, the charging plunger 60 moves backward to maintain the plug hole 51a of the second vacuum valve 50 in a closed state.
  • the charging plunger 60 is reversed so as to be separated from the plug hole 51a of the second vacuum valve 50, thereby destroying the internal vacuum of the first material injection pipe 40.
  • the light metal raw material 1 charged in the vacuum melting chamber 10 is melted by operating the heating unit 15 for melting.
  • the electromagnetic stirring unit 16 is operated to generate an electromagnetic field by the coil 16a of the electromagnetic stirring unit 16, and the light metal raw material 1 is stirred while the electromagnetic field is melted.
  • the gas inside the molten metal 2 is effectively separated, and furthermore, since the inside of the vacuum melting chamber 10 is in a vacuum state, the degassing effect is further maximized, and the composition of the molten metal alloy
  • the molten metal 2 stored in the vacuum melting chamber 10 by being uniform has an advantage in that its quality is very high.
  • the molten metal 2 in the first and second molten metal heat insulating tubes 70 and 80 by the heating operation of the heating unit 75 for warming is kept warm in a state where the solidification is prevented and is kept constant.
  • the molten metal 2 is kept at a temperature about 10 to 200 ° C. lower than the melting point of light metal raw materials.
  • the molten metal valve 85 is opened to tap the molten metal 2 to a mold casting machine (not shown), and the molten metal valve body 85 is closed as shown in FIG. It can be temporarily stored in the first and second molten metal insulation tube (70, 80).

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

La présente invention concerne un dispositif de fusion sous vide pour métaux légers et un procédé de fusion sous vide associé, et concerne plus précisément : un dispositif de fusion sous vide pour métaux légers employant un brassage électromagnétique, une matière première de métal léger étant fondue sous vide poussé au moyen d'une unité de chauffe et étant brassée électromagnétiquement au moyen d'une unité de brassage électromagnétique, permettant ainsi d'uniformiser la consistance du bain de fusion, d'améliorer le rendement de fusion, le rendement d'élimination (de bulles) de gaz etc., et également de produire un bain de fusion de bonne qualité, ainsi qu'un procédé de fusion sous vide employant ledit dispositif. Le dispositif de fusion sous vide de la présente invention comporte : une chambre de fusion sous vide équipée d'un tube d'évacuation d'air à sa partie supérieure ; un premier tube d'introduction de matériau relié à un côté de la chambre de fusion sous vide de manière à être en communication et équipé d'un tube d'évacuation d'air sur un côté ; un deuxième tube d'introduction de matériau raccordé entre le premier tube d'introduction de matériau et la chambre de fusion sous vide; une unité de chauffe utilisée pour la fusion et placée à l'extérieur de la chambre de fusion sous vide ; une unité de brassage électromagnétique qui est placée à l'extérieur de l'unité de chauffe utilisée pour la fusion et qui incorpore une bobine en spirale ; une première et une deuxième soupape de vide respectivement placées aux deux extrémités du premier tube d'introduction de matériau ; un premier tube de préservation de la chaleur du bain de fusion, qui se raccorde à l'autre côté de la chambre de fusion sous vide ; et un deuxième tube de préservation de la chaleur du bain de fusion, qui se raccorde au premier tube de préservation de la chaleur du bain de fusion.
PCT/KR2009/005486 2009-09-03 2009-09-25 Dispositif de fusion sous vide pour métaux légers employant un brassage électromagnétique, et procédé de fusion sous vide l'employant Ceased WO2011027930A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020090083189A KR101144770B1 (ko) 2009-09-03 2009-09-03 전자교반을 이용한 경금속 진공융해장치 및 이를 이용한 진공융해방법
KR10-2009-0083189 2009-09-03

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WO2011027930A1 true WO2011027930A1 (fr) 2011-03-10

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WO (1) WO2011027930A1 (fr)

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KR101688206B1 (ko) * 2015-03-09 2016-12-20 박상준 수평형 금속 사출 성형장치
CN113117385A (zh) * 2021-04-17 2021-07-16 夏婷 一种自消气泡的化工搅拌釜
CN116558289B (zh) * 2023-05-26 2025-11-25 泰州市友民交通器材有限公司 一种汽车用高性能颗粒增强铝基复合材料重熔回收装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR950010235Y1 (ko) * 1993-11-06 1995-11-23 만도기계 주식회사 진공고주파 용해로의 용해물질 추가장입장치
US6070643A (en) * 1997-09-12 2000-06-06 Howmet Research Corporation High vacuum die casting
JP2001294949A (ja) * 2000-04-07 2001-10-26 Kobe Steel Ltd 溶融金属の連続真空精製方法とその装置
KR100550144B1 (ko) * 2004-06-21 2006-02-08 고동근 다이케스팅기의 진공장치

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR950010235Y1 (ko) * 1993-11-06 1995-11-23 만도기계 주식회사 진공고주파 용해로의 용해물질 추가장입장치
US6070643A (en) * 1997-09-12 2000-06-06 Howmet Research Corporation High vacuum die casting
JP2001294949A (ja) * 2000-04-07 2001-10-26 Kobe Steel Ltd 溶融金属の連続真空精製方法とその装置
KR100550144B1 (ko) * 2004-06-21 2006-02-08 고동근 다이케스팅기의 진공장치

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KR20090126222A (ko) 2009-12-08
KR101144770B1 (ko) 2012-05-11

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