US20110214830A1 - Method and apparatus for producing hollow fusing blocks - Google Patents

Method and apparatus for producing hollow fusing blocks Download PDF

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Publication number
US20110214830A1
US20110214830A1 US13/038,738 US201113038738A US2011214830A1 US 20110214830 A1 US20110214830 A1 US 20110214830A1 US 201113038738 A US201113038738 A US 201113038738A US 2011214830 A1 US2011214830 A1 US 2011214830A1
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US
United States
Prior art keywords
mould
mandrel
consumable electrodes
recited
current source
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.)
Abandoned
Application number
US13/038,738
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English (en)
Inventor
Harald Holzgruber
Michael BREITLER
Bertram Ofner
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.)
Inteco Special Melting Tech GmbH
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Inteco Special Melting Tech GmbH
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 Inteco Special Melting Tech GmbH filed Critical Inteco Special Melting Tech GmbH
Assigned to INTECO SPECIAL MELTING TECHNOLOGIES GMBH reassignment INTECO SPECIAL MELTING TECHNOLOGIES GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BREITLER, MICHAEL, HOLZGRUBER, HARALD, OFNER, BERTRAM
Publication of US20110214830A1 publication Critical patent/US20110214830A1/en
Abandoned 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
    • B22D23/00—Casting processes not provided for in groups B22D1/00 - B22D21/00
    • B22D23/06—Melting-down metal, e.g. metal particles, in the mould
    • B22D23/10—Electroslag 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
    • B22D11/006—Continuous casting of metals, i.e. casting in indefinite lengths of tubes
    • 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
    • C22B9/16—Remelting metals
    • C22B9/18—Electroslag remelting

Definitions

  • Hollow cast bodies or ingots are used in a variety of applications, particularly for manufacturing mechanical parts in industry.
  • a method is known from the related art for producing hollow ingots according to the electroslag remelting process in which a water-cooled conical mandrel is inserted from above into and concentrically with a short, round mould, which is also water-cooled, in such manner that an annular gap is left between the mould and the mandrel.
  • rod-shaped consumable electrodes are arranged concentrically inside the annular gap, and the melting current is passed through the electrodes and into the slag bath located in the gap, and conducted away again through the slag bath and the bottom plate.
  • the consumable electrodes are melted by the Joule's heat generated as the current passes through the slag bath.
  • a mandrel arranged concentrically in the water-cooled mould is moved upwards through an opening in the bottom plate from the underside of the mould in such manner that the ingot is formed on the bottom plate, and the upper extremity of the mandrel always reaches into the slag bath, but always remains completely submerged therein.
  • This enables large consumable electrodes to melt in the slag bath above the mandrel.
  • the metal that is melted from the consumable electrodes drips onto the curved surface of the mandrel, from where it runs into the annular gap between the mould wall and the mandrel, again forming a hollow ingot.
  • a further method for producing hollow ingots by passing a current through the electrodes is described in AT 332.575.
  • the melting current is also passed through the consumable consumable electrodes, and a rotating bottom plate to achieve better heat distribution in the annular gap is also described.
  • Austrian patent AT 409729 B discloses a method in which a known electrically conductive mould is used in conjunction with an electrically conductive mandrel. The melting current is then applied to the slag bath via the mould and passes out of the slag bath again through the mandrel, for example.
  • An electrically conductive electrode is not required.
  • the metal can be introduced either in the form of molten metal or also in the form of solid metal, in which case granules, chippings or even rods may be used, but the metal is not energised.
  • the advantage of this method is that the temperature of the slag bath can then be adjusted independently of the feed rate of the molten or solid metal.
  • the method according to the invention is a method for producing hollow cast ingots by melting consumable electrodes in a slag bath in a short, water-cooled mould and using a mandrel, also water-cooled, that is introduced into the mould from above in conjunction with at least two consumable electrodes, each of which has a diameter at least 1.0 times the size of the annular gap between the mould wall forming the outer diameter of the hollow ingot and the diameter of the mandrel, wherein the consumable electrodes are melted in a mould that is flared, particularly in a T-shape, in the area of the electrodes to accommodate the slag bath, and wherein the liquid level of the metal content is adjusted and maintained below the flaring.
  • Control and regulation of the liquid level of the metal may be assured in various ways. It is advantageous if the location of the metal liquid level is determined via radioactive ⁇ -rays that are introduced from outside the mould in a position corresponding to the level of the metal and are received by a receiver fitted at the same level inside the water-cooled mandrel. In this way, the liquid level of the metal in the mould may be kept constant by interaction with a suitable controller of the retraction movement of the ingot resting on a bottom plate.
  • the melting current is distributed from one terminal of a single-phase current source to the at least two consumable electrodes and passed to the second terminal of the current source through the slag bath and bottom plate.
  • the option also exists to pass the entire melting current from one terminal to one of the at least two consumable electrodes, and from there through the slag bath and the liquid heel to the second of the at least two electrodes, and from there to the second terminal of the current source.
  • FIG. 1 is a simplified plan view of a system according to the invention for producing hollow cast bodies
  • FIG. 2 is a longitudinal section through the system of FIG. 1 along line II-II in FIG. 1 , and
  • FIG. 3 is a longitudinal section through the system of FIG. 1 along line III-III in FIG. 1 .
  • FIGS. 1 to 3 each show a water-cooled mould 10 with a flaring 11 having a preferably T-shaped longitudinal cross section (see FIG. 2 ) in the area to consumable electrodes 12 , which are melted in a slag bath 13 , wherein the molten metal is collected in a liquid heel 14 and after solidifying forms a remelt ingot or cast body, referred to in the following as a hollow ingot 18 , in a gap 15 between mould 10 and mandrel 17 , which is also water-cooled, which ingot is drawn downwards and out of mould 10 by a suitable device, not shown, which moves bottom plate 19 .
  • Mandrel 17 is held in position by a retaining plate 21 .
  • a ⁇ -ray receiver 22 located in mandrel 17 is also shown as well as a ⁇ -ray source 23 located outside of mould 10 .
  • An electromagnetic agitating coil 24 may optionally be situation in the area of liquid heel 14 .
  • At least two consumable electrodes 12 are arranged in a system 100 suitable for performing the method, the electrodes being supported and moved by appropriate supporting elements, not shown, and through which the melting current is passed, and via which they are introduced into slag bath 13 in such manner that they melt.
  • mould 10 containing slag bath 13 is flared in the area of consumable electrodes 12 , preferably in a T-Shape, about consumable electrodes 12 , which have a diameter D, which is equal to at least 1.0 times the size of gap width s of gap 15 .
  • Gap width s is defined by the mould wall 25 that forms the outer surface of hollow ingot 18 and the diameter of mandrel 17 , wherein mandrel 17 is tapered conically from the top downwards, that is to say towards bottom plate 19 .
  • the conicity of mandrel 17 is at least 1.5% relative to the diameter of the mandrel and relative to the length of mandrel 17 in the solidification zone of the metal in mould 10 .
  • the ⁇ -ray source 23 is preferably located outside mould 10 , below the T-shaped flaring 11 and in the desired position of the liquid level of the metal, and the ⁇ -ray receiver 22 for continuous control of the liquid level 27 of the metal is preferably fitted inside the water-cooled mandrel 17 .
  • Hollow ingot 18 that is formed and rests on bottom plate 19 is extracted from mould 10 in interaction with a corresponding controller in such manner that the liquid level 27 of the metal remains constant.
  • the supply and return path of the melt current to consumable electrodes 12 may be arranged in various ways.
  • one terminal of a single-phase current source is connected in parallel to the two consumable electrodes 12 , while the other terminal is connected to bottom plate 19 on which hollow ingot 18 rests.
  • the second terminal is also possible for the second terminal to be connected to mould 10 and/or mandrel 17 .
  • one of the at least two consumable electrodes 12 is connected to each the melting current source terminal.
  • electromagnetic agitating coil 24 is arranged outside of mould 10 in such manner that slag bath 13 may be rotated about the (longitudinal) axis of hollow ingot 18 in liquid heel 14 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Continuous Casting (AREA)
US13/038,738 2010-03-02 2011-03-02 Method and apparatus for producing hollow fusing blocks Abandoned US20110214830A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA317/2010 2010-03-02
AT0031710A AT509495B1 (de) 2010-03-02 2010-03-02 Verfahren und anlage zur herstellung hohler umschmelzblöcke

Publications (1)

Publication Number Publication Date
US20110214830A1 true US20110214830A1 (en) 2011-09-08

Family

ID=44080291

Family Applications (1)

Application Number Title Priority Date Filing Date
US13/038,738 Abandoned US20110214830A1 (en) 2010-03-02 2011-03-02 Method and apparatus for producing hollow fusing blocks

Country Status (5)

Country Link
US (1) US20110214830A1 (de)
EP (1) EP2364797A2 (de)
JP (1) JP2011177792A (de)
CN (1) CN102189246A (de)
AT (1) AT509495B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160045952A1 (en) * 2014-08-13 2016-02-18 Northeastern University Method for manufacturing hollow ingot for retaining ring of large generator by electroslag remelting
CN105903869A (zh) * 2016-04-13 2016-08-31 饶云福 一种护环短流程制造工艺
WO2019070699A1 (en) * 2017-10-05 2019-04-11 Lam Research Corporation ELECTROMAGNETIC CASTING SYSTEMS COMPRISING FURNACES AND MOLDS FOR PRODUCING SILICON TUBES

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103691913B (zh) * 2013-12-30 2016-04-13 攀钢集团江油长城特殊钢有限公司 1Mn18Cr18N空心钢锭的制造方法
CN106801146B (zh) * 2016-12-29 2019-03-22 东北大学 一种电渣重熔制备镍基高温合金空心钢锭的方法
CN108580820A (zh) * 2018-06-19 2018-09-28 沈阳麒飞新型材料科技有限公司 一种薄壁环形坯设备
CN112501448B (zh) * 2020-11-11 2022-05-03 湖南金天钛业科技有限公司 真空自耗熔炼合金的方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3687188A (en) * 1971-04-06 1972-08-29 Inst Elektrosvarki Ineni E O P Method and device for producing metal hollow ingots by electroslag remelting
US3834443A (en) * 1972-02-04 1974-09-10 Mitsubishi Heavy Ind Ltd Method and apparatus for manufacture of tubular bodies by electroslag remelting
US4290474A (en) * 1979-06-12 1981-09-22 Medovar Boris I Method and apparatus for electroslag casting of metals
US4974660A (en) * 1982-01-13 1990-12-04 Vallourec Process and apparatus for the production of hollow bodies by continuously casting in a magnetic field
US20100247946A1 (en) * 2009-03-27 2010-09-30 Titanium Metals Corporation Method and apparatus for semi-continuous casting of hollow ingots and products resulting therefrom

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GB1177387A (en) * 1967-04-19 1970-01-14 Ass Elect Ind Improvements relating to Ingot Production by an Electroslag Process
AT282846B (de) * 1968-02-12 1970-07-10 Boehler & Co Ag Geb Vorrichtung zur Herstellung hohler, aus Metallen, insbesondere aus Stählen bestehender Blöcke nach dem Elektroschlackenumschmelzverfahren
DE1952010C3 (de) * 1969-10-15 1973-10-18 Wsesojusnij Nautschno-Issledowatelskij Institut Elektrotermitscheskowo Oborudowanija, Moskau Anlage zum Elektroschlacke Gießen hohler Metallblocke
GB1332604A (en) * 1971-04-02 1973-10-03 Inst Elektroswarki Patona Method for producing metal hollow ingots by electroslag remelting and a device for performing this method
BE794080A (fr) 1972-01-28 1973-05-16 Mitsubishi Heavy Ind Ltd Perfectionnements apportes ou relatifs a la fabrication de corps tubulaires
BE804150A (en) * 1973-08-29 1974-02-28 Inst Elektroswarki Patona Hollow ingots mfr by electroslag remelting - for prodn of high pressure vessel and reactor body blanks
GB1509307A (en) * 1975-08-01 1978-05-04 Inst Elektroswarki Patona Apparatus for electroslag remelting of consumable electrodes and casting of hollow metal ingots
JPS577356A (en) * 1980-06-18 1982-01-14 Hitachi Ltd Production of composite cast ingot by electroslag refining
CN1059365C (zh) * 1995-12-12 2000-12-13 冶金工业部钢铁研究总院 一种复合轧辊的制造方法
AT409729B (de) 2000-02-16 2002-10-25 Inteco Int Techn Beratung Verfahren und anordnung zur herstellung von hohlen gusskörpern aus metallen
CN1818102A (zh) * 2006-03-07 2006-08-16 东北大学 连铸式电渣炉
CN101480715A (zh) * 2009-01-21 2009-07-15 东北大学 一种带有外加电磁搅拌的电渣熔铸装置及方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3687188A (en) * 1971-04-06 1972-08-29 Inst Elektrosvarki Ineni E O P Method and device for producing metal hollow ingots by electroslag remelting
US3834443A (en) * 1972-02-04 1974-09-10 Mitsubishi Heavy Ind Ltd Method and apparatus for manufacture of tubular bodies by electroslag remelting
US4290474A (en) * 1979-06-12 1981-09-22 Medovar Boris I Method and apparatus for electroslag casting of metals
US4974660A (en) * 1982-01-13 1990-12-04 Vallourec Process and apparatus for the production of hollow bodies by continuously casting in a magnetic field
US20100247946A1 (en) * 2009-03-27 2010-09-30 Titanium Metals Corporation Method and apparatus for semi-continuous casting of hollow ingots and products resulting therefrom

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160045952A1 (en) * 2014-08-13 2016-02-18 Northeastern University Method for manufacturing hollow ingot for retaining ring of large generator by electroslag remelting
US9393613B2 (en) * 2014-08-13 2016-07-19 Northeastern University Method for manufacturing hollow ingot for retaining ring of large generator by electroslag remelting
CN105903869A (zh) * 2016-04-13 2016-08-31 饶云福 一种护环短流程制造工艺
WO2019070699A1 (en) * 2017-10-05 2019-04-11 Lam Research Corporation ELECTROMAGNETIC CASTING SYSTEMS COMPRISING FURNACES AND MOLDS FOR PRODUCING SILICON TUBES
KR20200052976A (ko) * 2017-10-05 2020-05-15 램 리써치 코포레이션 실리콘 튜브들을 생성하기 위한 퍼니스들 (furnace) 및 몰드들 (mold) 을 포함하는 전자기 주조 시스템들
US20200238370A1 (en) * 2017-10-05 2020-07-30 Lam Research Corporation Electromagnetic casting systems including furnaces and molds for producing silicon tubes
US11534819B2 (en) * 2017-10-05 2022-12-27 Lam Research Corporation Electromagnetic casting systems including furnaces and molds for producing silicon tubes
KR102681928B1 (ko) * 2017-10-05 2024-07-04 램 리써치 코포레이션 실리콘 튜브들을 생성하기 위한 퍼니스들 (furnace) 및 몰드들 (mold) 을 포함하는 전자기 주조 시스템들

Also Published As

Publication number Publication date
JP2011177792A (ja) 2011-09-15
EP2364797A2 (de) 2011-09-14
CN102189246A (zh) 2011-09-21
AT509495B1 (de) 2012-01-15
AT509495A1 (de) 2011-09-15

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Legal Events

Date Code Title Description
AS Assignment

Owner name: INTECO SPECIAL MELTING TECHNOLOGIES GMBH, AUSTRIA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HOLZGRUBER, HARALD;BREITLER, MICHAEL;OFNER, BERTRAM;REEL/FRAME:025887/0097

Effective date: 20110214

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION