EP0631829B1 - Trennmittel für die Warmumformung von gekapselten Metallteilen und Verfahren zum Herstellen des Trennmittels - Google Patents

Trennmittel für die Warmumformung von gekapselten Metallteilen und Verfahren zum Herstellen des Trennmittels Download PDF

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Publication number
EP0631829B1
EP0631829B1 EP93810378A EP93810378A EP0631829B1 EP 0631829 B1 EP0631829 B1 EP 0631829B1 EP 93810378 A EP93810378 A EP 93810378A EP 93810378 A EP93810378 A EP 93810378A EP 0631829 B1 EP0631829 B1 EP 0631829B1
Authority
EP
European Patent Office
Prior art keywords
separating agent
slurry
agent according
layer
release agent
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
EP93810378A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0631829A1 (de
Inventor
Emad Dr. Batawi
John Antony Dr. Peters
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.)
Sulzer Markets and Technology AG
Original Assignee
Sulzer Innotec AG
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 Sulzer Innotec AG filed Critical Sulzer Innotec AG
Priority to EP93810378A priority Critical patent/EP0631829B1/de
Priority to AT93810378T priority patent/ATE156394T1/de
Priority to DE59307079T priority patent/DE59307079D1/de
Priority to US08/247,808 priority patent/US5658623A/en
Priority to JP6111392A priority patent/JPH07132510A/ja
Publication of EP0631829A1 publication Critical patent/EP0631829A1/de
Application granted granted Critical
Publication of EP0631829B1 publication Critical patent/EP0631829B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/002—Extruding materials of special alloys so far as the composition of the alloy requires or permits special extruding methods of sequences
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/38—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/30—Foil or other thin sheet-metal making or treating
    • Y10T29/301—Method
    • Y10T29/303—Method with assembling or disassembling of a pack
    • Y10T29/304—Using transitory solid cover material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/30—Foil or other thin sheet-metal making or treating
    • Y10T29/301—Method
    • Y10T29/303—Method with assembling or disassembling of a pack
    • Y10T29/305—Method with assembling or disassembling of a pack including bond prevention treatment
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/30—Foil or other thin sheet-metal making or treating
    • Y10T29/301—Method
    • Y10T29/303—Method with assembling or disassembling of a pack
    • Y10T29/306—Disassembling of a pack
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4981—Utilizing transitory attached element or associated separate material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49998—Work holding
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12014—All metal or with adjacent metals having metal particles
    • Y10T428/12028—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
    • Y10T428/131—Glass, ceramic, or sintered, fused, fired, or calcined metal oxide or metal carbide containing [e.g., porcelain, brick, cement, etc.]

Definitions

  • the invention relates to a release agent for the hot forming of encapsulated metal parts and a method for producing the release agent.
  • the metal parts to be reshaped consist in particular of reactive metals which are susceptible to corrosion at elevated temperatures and which are intended to be shaped into foils.
  • the hot forming is preferably carried out by means of a conventional hot rolling device.
  • the reactive metal forms a sandwich-like package together with a capsule and a release agent.
  • the capsule which is welded together from at least two parts (cover disks), seals the reactive metal gas-tight against the environment.
  • the release agent which is inert towards the reactive metal, ensures that there is no metallurgical connection between the reactive metal and the capsule during hot forming.
  • the release agent deforms plastically under the pressure generated or it flows like a highly viscous liquid; there is always a uniform, coherent separation layer between the metals.
  • the release agents are brittle at ambient temperature, so that the formed metals can be separated easily.
  • Such a method for film production is known from EP-A-0374094: a sheet-shaped metal piece is encased by a capsule, which is composed of two cover disks and a frame-like intermediate piece.
  • the reactive metal from which this piece of metal is made is, for example, a titanium aluminide (Ti 3 Al-based alloy), which can be formed at around 1000 ° C.
  • Metal halides are proposed as the material for the release agent; these are inert to titanium-based alloys.
  • the release agent is filled into the recesses of the capsule cover disks, layers of 0.4 to 2 mm thickness being produced.
  • the release agent material which is in the form of a powder, is preferably applied by a thermal spraying process (for example atmospheric plasma spraying); there are advantageously no air pockets.
  • a thermal spraying process for example atmospheric plasma spraying
  • porous, air-containing layers are formed.
  • the release agent can also be assigned other functions that are important for the forming process: the release agent acts as thermal insulation, which advantageously limits heat flow from the metal piece to be formed to the rolling device. (See also US Pat. No. 4,966,816, which describes a heat-insulating, fleece-like intermediate layer which is provided in addition to the release agent.)
  • the release agent can also have the advantageous effect that the deforming shear forces gently attack the metal piece at high hydrostatic pressure; it reduces the risk of cracking. These effects are particularly pronounced with thick layers of release agent. In the known forming process, due to the special capsule design, it is complex to produce a thick release agent layer.
  • This object is achieved by a release agent with the features mentioned in claim 1.
  • the release agent is produced in the form of separate components, for example in the form of plates.
  • the capsule's cover disks therefore no longer have to have a recess for receiving release agents; they can simply consist of pieces of sheet metal of constant thickness. Accordingly, it is only necessary to provide a wider capsule frame in order to be able to meet the larger space requirement for the release agent.
  • the release agent according to the invention can be produced, for example, by means of a slip casting process. With this method it is obviously easier to manufacture thick layers of release agent than thin ones.
  • the hot forming of an encapsulated piece of metal can also be carried out by extrusion through drawing dies, similar to the production of wires.
  • a tubular component must be provided for the release agent according to the invention.
  • Calcium fluoride (CaF 2 , melting point 1418 ° C.) has proven to be particularly advantageous among the materials already known for the release agent. Its thermal conductivity is relatively low (9.2 W / m ⁇ K at 38 ° C and around 3 W / m ⁇ K at 1000 ° C). It also has a relatively high coefficient of thermal expansion (20 ⁇ 10 -6 K -1 ), which is higher than that of the capsule material and the metal piece. Thanks to the difference in thermal expansion, an increased pressure is desirably formed in the release agent during the heating that is required for the forming process.
  • the starting material for the release agent is, for example, powdered CaF 2 , which contains water of crystallization and around 6000 ppm by weight of oxygen.
  • This powder is slurried with distilled water and the slurry formed is poured into a mold from which the casting can be removed after drying.
  • the dried casting is sintered. While the dried casting has an oxygen content that is around 50% higher than that of the CaF 2 powder, surprisingly the sintered CaF 2 has a greatly reduced oxygen content of around 500 ppm.
  • the oxygen content passes through at a minimum depending on the sintering time at higher sintering temperatures (above 800 ° C), namely after around an hour.
  • the duration of the sintering process step is advantageously selected such that the oxygen content of the release agent is minimal or approximately minimal.
  • the oxygen content is as low as possible. Because the oxygen can react with the release of fluorine with the calcium. With the formed titanium aluminide, it has been shown that the fluorine leads to corrosion, which means an impairment of the surface quality. In addition, it is advantageous to remove air bubbles, which are enclosed in the slurry (slip), in an evacuable vessel by air extraction.
  • a binder can be added to the slurry; this binder is said to Sintering can be pyrolyzed without residues or be inert with respect to the metal piece to be formed.
  • the shaping can also be carried out by means of an extrusion or extrusion process.
  • This requires an extrudable powder slurry that can be obtained, for example, from a slurry intended for the slip casting process by dewatering.
  • the capsule 10 is composed of two cover disks 10a and 10b and a frame-like intermediate piece 10c; these parts are connected to one another via gas-tight weld seams 11a and 11b.
  • the release agent 3a or 3b can be produced by means of a slip casting or an extrusion process and subsequent drying and sintering.
  • the package 1 and the metal piece 2 are cylindrical.
  • the release agent 3 according to the invention is tubular.
  • the capsule 10 consists of a jacket 100 and two end plates 101 and 102.
  • the jacket 100 can be formed from a rectangular sheet metal plate into a cylinder and welded along the seam 110.
  • the end plates 101 and 102 are welded to the jacket 100 via the seams 111 and 112.
  • Hot forming is carried out, for example, by extrusion through drawing dies.
  • the two methods already mentioned are again suitable for the production of the release agent 3.
  • another cross-sectional profile can also be selected for the metal piece 2 to be formed. Appropriate shaping must then be provided for the release agent 3 and the capsule 10.
  • the metal piece 2 can also be tubular, as shown in Figure 3.
  • the interior of the metal piece 2 is filled with a core 4.
  • This core 4 can be made of the same material and in the same way as the release agent 3.
  • the core 4 can also be produced from two parts, namely from a "core in the core” consisting of capsule material and a separating agent layer surrounding this core.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Powder Metallurgy (AREA)
  • Lubricants (AREA)
  • Producing Shaped Articles From Materials (AREA)
EP93810378A 1993-05-25 1993-05-25 Trennmittel für die Warmumformung von gekapselten Metallteilen und Verfahren zum Herstellen des Trennmittels Expired - Lifetime EP0631829B1 (de)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP93810378A EP0631829B1 (de) 1993-05-25 1993-05-25 Trennmittel für die Warmumformung von gekapselten Metallteilen und Verfahren zum Herstellen des Trennmittels
AT93810378T ATE156394T1 (de) 1993-05-25 1993-05-25 Trennmittel für die warmumformung von gekapselten metallteilen und verfahren zum herstellen des trennmittels
DE59307079T DE59307079D1 (de) 1993-05-25 1993-05-25 Trennmittel für die Warmumformung von gekapselten Metallteilen und Verfahren zum Herstellen des Trennmittels
US08/247,808 US5658623A (en) 1993-05-25 1994-05-23 Parting compound for the hot forming of encased metal parts and a process for manufacturing the parting compound
JP6111392A JPH07132510A (ja) 1993-05-25 1994-05-25 容器内金属部品の熱間成形における区画用化合物及び区画用化合物の製造方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP93810378A EP0631829B1 (de) 1993-05-25 1993-05-25 Trennmittel für die Warmumformung von gekapselten Metallteilen und Verfahren zum Herstellen des Trennmittels

Publications (2)

Publication Number Publication Date
EP0631829A1 EP0631829A1 (de) 1995-01-04
EP0631829B1 true EP0631829B1 (de) 1997-08-06

Family

ID=8214974

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93810378A Expired - Lifetime EP0631829B1 (de) 1993-05-25 1993-05-25 Trennmittel für die Warmumformung von gekapselten Metallteilen und Verfahren zum Herstellen des Trennmittels

Country Status (5)

Country Link
US (1) US5658623A (ja)
EP (1) EP0631829B1 (ja)
JP (1) JPH07132510A (ja)
AT (1) ATE156394T1 (ja)
DE (1) DE59307079D1 (ja)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1157810A (ja) * 1997-08-14 1999-03-02 Nkk Corp チタン合金シート材の製造方法
US20070156114A1 (en) * 2005-12-29 2007-07-05 Worley Seth J Deflectable catheter with a flexibly attached tip section
US11471650B2 (en) 2019-09-20 2022-10-18 Biosense Webster (Israel) Ltd. Mechanism for manipulating a puller wire

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB693114A (en) * 1949-12-01 1953-06-24 Lukens Steel Co Parting composition and method of pack-rolling using the same
US2985945A (en) * 1954-02-12 1961-05-30 Crucible Steel Co America Pack rolling
DE1081404B (de) * 1956-03-28 1960-05-12 Comptoir Ind Etirage Verfahren zum Herstellen duennwandiger Metallrohre durch Warmstrangpressen
US3658565A (en) * 1969-01-29 1972-04-25 Lukens Steel Co Parting compound containing chromium oxide manganese dioxide and a liquid inorganic carrier
US5154863A (en) * 1985-10-31 1992-10-13 Kyocera Corporation Aluminum nitride-based sintered body and process for the production thereof
US5121535A (en) * 1988-12-14 1992-06-16 Sulzer Bros. Ltd. Method for production of thin sections of reactive metals
US5127146A (en) * 1988-12-14 1992-07-07 Sulzer Brothers, Ltd. Method for production of thin sections of reactive metals
US4966816A (en) * 1989-06-07 1990-10-30 Titanium Metals Corporation Of America (Timet) Pack assembly for hot rolling
US5401677A (en) * 1993-12-23 1995-03-28 International Business Machines Corporation Method of metal silicide formation in integrated circuit devices

Also Published As

Publication number Publication date
JPH07132510A (ja) 1995-05-23
DE59307079D1 (de) 1997-09-11
ATE156394T1 (de) 1997-08-15
EP0631829A1 (de) 1995-01-04
US5658623A (en) 1997-08-19

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