WO2000010752A1 - Outil de fonderie pour la coulee de pieces moulees en metaux non ferreux - Google Patents

Outil de fonderie pour la coulee de pieces moulees en metaux non ferreux Download PDF

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Publication number
WO2000010752A1
WO2000010752A1 PCT/EP1999/006233 EP9906233W WO0010752A1 WO 2000010752 A1 WO2000010752 A1 WO 2000010752A1 EP 9906233 W EP9906233 W EP 9906233W WO 0010752 A1 WO0010752 A1 WO 0010752A1
Authority
WO
WIPO (PCT)
Prior art keywords
casting
heavy metal
casting tool
tool according
particles
Prior art date
Application number
PCT/EP1999/006233
Other languages
German (de)
English (en)
Inventor
Fidelius Greiner
Marion Von Cetto
Original Assignee
Ges. Für Wolfram Industrie Mbh
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 Ges. Für Wolfram Industrie Mbh filed Critical Ges. Für Wolfram Industrie Mbh
Priority to PL346151A priority Critical patent/PL191290B1/pl
Priority to EP99946021A priority patent/EP1105236B1/fr
Priority to AT99946021T priority patent/ATE219400T1/de
Priority to DE59901818T priority patent/DE59901818D1/de
Publication of WO2000010752A1 publication Critical patent/WO2000010752A1/fr

Links

Classifications

    • 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
    • B22D17/20—Accessories: Details
    • B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
    • B22D17/2209—Selection of die materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/06—Permanent moulds for shaped castings
    • B22C9/061—Materials which make up the mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D15/00—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor
    • B22D15/04—Machines or apparatus for chill casting
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
    • C22C27/04—Alloys based on tungsten or molybdenum

Definitions

  • casting tools e.g. Chill molds or casting molds are required to transfer an almost finished component.
  • Such components can be supplied as semi-finished products, as construction components, as finished parts or the like for further processing or the actual intended use.
  • the molds or casting molds required for this consist of suitable steels, i.e. from ferrous metals.
  • casting tools manufactured from these materials are often unable to cope with the heavy loads caused by intensive contact with liquid light metals. This results in damage to the surface and thus the replacement of worn casting tools. This damage manifests itself in washouts and fire cracks. Wash-out occurs due to erosion, corrosion and welding. Fire cracks are a result of thermal fatigue in the materials involved.
  • Erosion is the mechanical wear caused by the high flow velocities of light metals such as aluminum and magnesium during casting.
  • the erosion of the casting tools is all the more the less resistant the materials used are under the conditions used.
  • Ejection from the mold can then damage the mold surface.
  • the object of the invention is to remedy this.
  • tungsten, tungsten alloys, molybdenum or molybdenum alloys are used as the heavy metal.
  • the molds or casting molds can consist entirely of the high-melting heavy metal or the heavy metal alloy or of steel, the effective surfaces of which face the non-ferrous metal during the casting process are sufficiently strongly coated with the high-melting heavy metal or its alloys.
  • the alloys of tungsten consist of at least 30% tungsten (W) and moreover mainly of the alloying elements nickel (Ni), iron (Fe) and copper (Cu).
  • W tungsten
  • Ni nickel
  • Fe iron
  • Cu copper
  • the alloys of tungsten consist of at least 30% tungsten (W) and moreover mainly of the alloying elements nickel (Ni), iron (Fe) and copper (Cu).
  • the significant improvement in the weldability of aluminum castings by using the casting molds according to the invention is particularly advantageous in the manufacture of aluminum castings composed of chassis and bodies for the automotive industry.
  • Another advantage of the invention has resulted from the fact that magnesium alloys in particular can now be painted.
  • the negligible dissolution of the molding material also leads to a significant increase in the service life of the mold or casting mold during the manufacturing processes.
  • the casting tools, molds, printing and casting molds to be produced from the high-melting heavy metals can have any shape and design in accordance with the manufacturing process used and the material to be used for the manufacturing process.
  • the high-melting heavy metal alloys in particular the tungsten alloy, as a molded element or coating of the molded element or contact part to the molded part to be produced within the molded element, but instead from a sintered part , which consists of a framework of microscopic particles, in particular monocrystals of the heavy metal, which are firmly connected to one another by a binding matrix, and which also contains the heavy metal.
  • the particles or grains are spherical, ideally spherical.
  • the proportions in the shaped element or the shaped element, which consists of a heavy metal alloy, are to be selected in this case, and the sintering process is to be carried out in such a way that a shaped element with high mechanical strength and at the same time a low proportion of the alloy elements added to the heavy metal is achieved on the contact surface between the molded element and molded part.
  • the approximately spherical particles of tungsten have a diameter of 10 ⁇ m to 40 ⁇ m, in particular of 20 ⁇ m to 30 ⁇ m.
  • the size of these particles is influenced on the one hand by the percentage (all percentages given in the present application are percentages by weight) and on the other hand by the physical parameters of the sintering process.
  • the particles for example made of tungsten, had a larger diameter, the tensile strength of the corresponding sintered part would be too low, and thus its resistance to temperature changes would decrease.
  • the size of the particles of heavy metal can be controlled by the type of sintering process.
  • alloy elements which are to be selected from elements 22 to 29 or 40 to 47 or 72 to 79 of the periodic table of the elements, and in particular from the group of Elements 25 to 29 or 46 and 78 should be selected, and if possible not include more than three alloy elements in total, so that a dense material is formed.
  • the binding matrix itself is a metal grid structure, which is made from the melt of the alloyed elements, e.g. There is nickel and iron, in which also that
  • Heavy metal is dissolved to a small extent - with tungsten up to 30% tungsten in the binding matrix. It is also possible to sinter at such low temperatures that the elements of the binding matrix do not pass into the melt, but remain in the solid phase.
  • the specified diameter size of the heavy metal particles therefore represents an optimal middle way.
  • the area portion of the heavy metal particles at the contact surface can be increased at the expense of the binding matrix portions by mechanically processing the contact area of the shaped element towards the shaped part after sintering the shaped element, for example by machining removal such as milling or grinding, but also by eroding , is processed.
  • the particles consisting of heavy metal are capped at the contact surface, so that their spherical shape has a flat surface on the contact side. Since the spherical particles build up on the outer surface of the sintering mold during sintering, the area fraction of the particles is increased compared to the binding matrix portion in the contact area compared to this initial structure, and the width of the binding matrix contact areas is thereby reduced to a maximum of 1 ⁇ m to 5 ⁇ m.
  • the large wetting angle between tungsten and the light metals such as Al and Mg in connection with the small web widths of the binding matrix prevents under-rinsing and thus the removal of heavy metal particles.
  • the heavy metal alloy can be applied to the shaped element as a thin coating, in particular in the non-solid state, i.e. powdered or liquid, or in the form of a sheet-like thin coating, depends on the deformability of the heavy metal alloy and / or its melting point compared to the melting point of the base part of the shaped element.
  • the entire shaped element is made of the tungsten alloy, or a contact part screwed to the base part (e.g. made of iron) or otherwise positively connected. It should be ensured that due to the different thermal expansion behavior of tungsten on the one hand and e.g. Iron, on the other hand, does not warp the contact part made of the heavy metal alloy when heated, which - because of the material savings in the tungsten alloy - will only be used relatively thinly, while the mechanical stability and pressure resistance are ensured by the outer base part should.
  • Fig. 2 the representation of another structure within the shaped element
  • Fig. 3 different form elements.
  • the shaped element consisting of the heavy metal alloy or the part of the shaped element which comes into contact with the shaped part 3 to be produced (contact part 5) consists of a large number of small, spherical, in particular spherical, particles 6 exists, which are held together by a binding matrix 7 filling the spaces.
  • This composite is made by sintering.
  • the particles 6 consist entirely or in particular largely of the heavy metal used, for example tungsten, while the binding matrix consists of a solid mixture of the added alloying elements, for example nickel and iron, and in turn the heavy metal used, for. B. tungsten.
  • the temperature prevailing during sintering is e.g. B. below the melting point of the heavy metal used, z. B. tungsten, but above the melting points of the other alloying elements, e.g. B. nickel and iron.
  • These alloying elements are thus in the form of a melt, which means that part of the tungsten also dissolves in the melt, so that the binding matrix is initially in total solution and solidifies when the sintering process is ended, thus forming the known molecular lattice structure of a metal alloy.
  • the spherical, in particular spherical, particles which consist exclusively of the heavy metal stick directly to one another and, additionally, the existing cavities between the particles which are formed are filled by the described binding matrix, which likewise have a very high adhesiveness to the structure made of heavy metal, a sintered body is formed whose mechanical properties, in particular tensile strength, are significantly higher than that of pure heavy metal, in particular tungsten.
  • the heavy metal content should not exceed an upper limit of 98%, better 95%.
  • the portions of the binding matrix on the contact surface are preferably funnel-shaped. At the beginning of the use of the contact part 5 or shaped element, therefore - as shown in dash-dotted lines - there is an increasing release of material from the binding matrix 7 from the contact surface 10, so that here cavities are formed in the contact surface 10 in the region of the binding matrix 7 will be done.
  • FIG 3a shows a casting mold with its mold halves 1a, 1b.
  • Each mold half 1a, 1b consists on the one hand of a contact part 5a, 5b facing the cavity for the later molded part 3, which is reinforced on its rear side by a corresponding base part 4a, 4b.
  • the base part 4a, 4b can consist of iron or steel material, while the contact part 5a, 5b consists of the heavy metal alloy according to the invention.
  • the two parts preferably lie against one another along a flat or at least straight in one direction contact surface 8 and are connected to one another in a form-locking or material-locking manner.
  • Fig. 3b shows a mold 2 for the continuous casting of z. B. aluminum.
  • the base part 4 surrounding the continuous casting opening again consists of the heavy metal alloy according to the invention, but its wall thickness is again kept thin, since it is supported on the outside by a surrounding base part 4, which can be made of iron or steel.
  • the connection between the two parts can be made in the same way as for casting molds.
  • 3c shows an example of a mold half again, for example 1a, of a casting mold, which in turn consists of contact part 5 and base part 4 made of heavy metal alloy on the one hand and iron or steel on the other hand.
  • the contact surface 8 is channel-shaped with a hat-shaped cross section.
  • the heavy metal alloy used for contact part 5, for example tungsten alloy is only flexible to a limited extent, even when used as flat strip material or sheet metal, so that the radii of curvature of the contact surface 6 must be based on this flexibility of the heavy metal alloy and must not be too small.
  • a strip material with a constant thickness made of the heavy metal alloy is preferably used and applied to the base part 4, the thickness of the strip material used being so large that the cross section of the contact surface 10 to be produced is still completely within the cross section of the strip material 9.
  • the contact surface 10 is then produced in the desired shape by spark erosion or machining.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Powder Metallurgy (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Mold Materials And Core Materials (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Continuous Casting (AREA)

Abstract

Dans la coulée de pièces moulées en métaux non ferreux, par exemple en métaux légers comme l'aluminium ou le magnésium, apparaissent des problèmes relatifs à la peignabilité ou à la soudabilité de ces pièces, si l'outil de fonderie, par exemple le moule, est constitué de fer. D'après l'invention, les outils de fonderie, par exemple le moule, sont soit fabriqués à partir d'un alliage de métal lourd, par exemple un alliage de tungstène, soit revêtus de cet alliage sur la surface de contact en regard de la pièce moulée. En particulier, l'alliage de métal lourd prend la forme d'une pièce moulée frittée qui est ensuite traitée sur la surface de contact, en particulier traitée mécaniquement, notamment usinée.
PCT/EP1999/006233 1998-08-25 1999-08-25 Outil de fonderie pour la coulee de pieces moulees en metaux non ferreux WO2000010752A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
PL346151A PL191290B1 (pl) 1998-08-25 1999-08-25 Urządzenie do odlewania elementów z metali nieżelaznych i sposób wytwarzania urządzenia do odlewania elementów z metali nieżelaznych
EP99946021A EP1105236B1 (fr) 1998-08-25 1999-08-25 Outil de fonderie pour la coulee de pieces moulees en metaux non ferreux
AT99946021T ATE219400T1 (de) 1998-08-25 1999-08-25 Giesswerkzeug für das giessen von formteilen aus nicht-eisenmetallen
DE59901818T DE59901818D1 (de) 1998-08-25 1999-08-25 Giesswerkzeug für das giessen von formteilen aus nicht-eisenmetallen

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19838561A DE19838561A1 (de) 1998-08-25 1998-08-25 Gießform für das Gießen von Formteilen aus Nicht-Eisenmetallen
DE19838561.7 1998-08-25

Publications (1)

Publication Number Publication Date
WO2000010752A1 true WO2000010752A1 (fr) 2000-03-02

Family

ID=7878634

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1999/006233 WO2000010752A1 (fr) 1998-08-25 1999-08-25 Outil de fonderie pour la coulee de pieces moulees en metaux non ferreux

Country Status (6)

Country Link
EP (1) EP1105236B1 (fr)
AT (1) ATE219400T1 (fr)
DE (2) DE19838561A1 (fr)
ES (1) ES2178471T3 (fr)
PL (1) PL191290B1 (fr)
WO (1) WO2000010752A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1785506A1 (fr) 2005-11-09 2007-05-16 Centre de compétence de l'Ind. Techn. (CRIF) - Kenniscentrum van de Tech. Ind. (WICM) Couche protectrice pour moules de fonderie
DE102019112586A1 (de) * 2019-05-14 2020-11-19 Weldstone Components GmbH Modifizierte Füllkammer für eine Druckgießmaschine

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005054616B3 (de) 2005-11-16 2006-11-09 Hydro Aluminium Mandl&Berger Gmbh Dauergießform und Gießformeinsatz
DE102006002342A1 (de) * 2006-01-18 2007-07-26 Kompetenzzentrum Neue Materialien Nordbayern Gmbh Werkzeug
CN107088739B (zh) * 2017-05-10 2021-07-02 苏州胜利精密制造科技股份有限公司 一种电子产品部件的加工方法

Citations (10)

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Publication number Priority date Publication date Assignee Title
DE618870C (de) * 1932-03-04 1935-09-17 Heraeus Vacuumschmelze Akt Ges Spritzgussform
BE643069A (fr) * 1963-01-30 1964-05-15
DE1284051B (de) * 1962-10-18 1968-11-28 Mannesmann Ag Aus Kupferplatten bestehende wassergekuehlte Durchlaufkokille fuer Stahlstrangguss
DE2231807A1 (de) * 1971-06-30 1973-01-18 Mitsubishi Metal Mining Co Ltd Huelse als zylindrische druckkammer fuer spritzgussmaschinen
JPS49110510A (fr) * 1973-02-23 1974-10-21
US3890145A (en) * 1969-10-28 1975-06-17 Onera (Off Nat Aerospatiale) Processes for the manufacture of tungsten-based alloys and in the corresponding materials
US3909241A (en) * 1973-12-17 1975-09-30 Gte Sylvania Inc Process for producing free flowing powder and product
JPS5450427A (en) * 1977-09-30 1979-04-20 Hitachi Ltd Method and apparatus for making aluminum diecast
DE4040032A1 (de) * 1989-12-22 1991-06-27 Htm Ag Verfahren zur herstellung einer fuellbuechse fuer druckgussmaschinen
JPH05354A (ja) * 1991-06-21 1993-01-08 Olympus Optical Co Ltd 金属成形用鋳型

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE618870C (de) * 1932-03-04 1935-09-17 Heraeus Vacuumschmelze Akt Ges Spritzgussform
DE1284051B (de) * 1962-10-18 1968-11-28 Mannesmann Ag Aus Kupferplatten bestehende wassergekuehlte Durchlaufkokille fuer Stahlstrangguss
BE643069A (fr) * 1963-01-30 1964-05-15
US3890145A (en) * 1969-10-28 1975-06-17 Onera (Off Nat Aerospatiale) Processes for the manufacture of tungsten-based alloys and in the corresponding materials
DE2231807A1 (de) * 1971-06-30 1973-01-18 Mitsubishi Metal Mining Co Ltd Huelse als zylindrische druckkammer fuer spritzgussmaschinen
JPS49110510A (fr) * 1973-02-23 1974-10-21
US3909241A (en) * 1973-12-17 1975-09-30 Gte Sylvania Inc Process for producing free flowing powder and product
JPS5450427A (en) * 1977-09-30 1979-04-20 Hitachi Ltd Method and apparatus for making aluminum diecast
DE4040032A1 (de) * 1989-12-22 1991-06-27 Htm Ag Verfahren zur herstellung einer fuellbuechse fuer druckgussmaschinen
JPH05354A (ja) * 1991-06-21 1993-01-08 Olympus Optical Co Ltd 金属成形用鋳型

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Section Ch Week 197505, Derwent World Patents Index; Class M26, AN 1975-08352W, XP002121506 *
DATABASE WPI Section Ch Week 197922, Derwent World Patents Index; Class M22, AN 1979-41478B, XP002121505 *
PATENT ABSTRACTS OF JAPAN vol. 017, no. 256 (M - 1413) 20 May 1993 (1993-05-20) *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1785506A1 (fr) 2005-11-09 2007-05-16 Centre de compétence de l'Ind. Techn. (CRIF) - Kenniscentrum van de Tech. Ind. (WICM) Couche protectrice pour moules de fonderie
DE102019112586A1 (de) * 2019-05-14 2020-11-19 Weldstone Components GmbH Modifizierte Füllkammer für eine Druckgießmaschine
WO2020229588A1 (fr) 2019-05-14 2020-11-19 Weldstone Components GmbH Substrats métalliques sujets à usure revêtus et procédé de fabrication de ceux-ci
CN113966255A (zh) * 2019-05-14 2022-01-21 韦尔斯通组件有限责任公司 经涂覆的、易磨损的金属基底及其制造方法
US20220243313A1 (en) * 2019-05-14 2022-08-04 Weldstone Components GmbH Coated Metal Substrates That Are Susceptible to Wear, and Method for the Manufacture Thereof

Also Published As

Publication number Publication date
ATE219400T1 (de) 2002-07-15
ES2178471T3 (es) 2002-12-16
EP1105236B1 (fr) 2002-06-19
PL346151A1 (en) 2002-01-28
DE59901818D1 (de) 2002-07-25
PL191290B1 (pl) 2006-04-28
EP1105236A1 (fr) 2001-06-13
DE19838561A1 (de) 2000-03-02

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