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WO2003018235A1 - Systeme de coulee de metal - Google Patents

Systeme de coulee de metal Download PDF

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Publication number
WO2003018235A1
WO2003018235A1 PCT/AU2002/001139 AU0201139W WO03018235A1 WO 2003018235 A1 WO2003018235 A1 WO 2003018235A1 AU 0201139 W AU0201139 W AU 0201139W WO 03018235 A1 WO03018235 A1 WO 03018235A1
Authority
WO
WIPO (PCT)
Prior art keywords
cep
alloy
flow
inlet end
die cavity
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/AU2002/001139
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English (en)
Inventor
Patrick William Rohan
Morris Taylor Murray
Matthew Alan Cope
Alan Michael Quadling
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.)
Commonwealth Scientific and Industrial Research Organization CSIRO
Original Assignee
Commonwealth Scientific and Industrial Research Organization CSIRO
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
Priority claimed from AUPR7218A external-priority patent/AUPR721801A0/en
Application filed by Commonwealth Scientific and Industrial Research Organization CSIRO filed Critical Commonwealth Scientific and Industrial Research Organization CSIRO
Publication of WO2003018235A1 publication Critical patent/WO2003018235A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • 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
    • B22D17/2015—Means for forcing the molten metal into the die
    • 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
    • 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
    • B22D17/2272—Sprue channels

Definitions

  • METAL FLOW SYSTEM This invention relates to a metal flow system for use in high pressure casting of alloys, and to a process and apparatus for use in high-pressure casting using the metal flow system.
  • PCT/AU98/0987 relates to such casting of magnesium alloys
  • PCT/AU 01/01058 relates to such casting of aluminium alloys
  • PCT/AU01/00595 and PCT/AU01/01290 relate to devices for use in casting those and other alloys such as, but not limited to, zinc and copper alloys.
  • a CEP while relatively short, is a part of an alloy flow path which increases in cross-section from an inlet end of the CEP and through to an outlet end of the CEP.
  • the CEP may open to or within a die cavity, in an arrangement providing for casting by direct injection. While the outlet end preferably opens to the die cavity, there are circumstances where the form of the die cavity, in a region into which alloy first flows, is such that the region of the die cavity is able to define at least an outlet end portion of the length of the CEP. That is, the CEP may be at least in part within, and defined by, the region of the die cavity.
  • alloy may flow through a sprue region to a runner.
  • a CEP may be provided at the inlet or outlet end of the runner, or between respective runners.
  • a runner which provides alloy flow to the CEP has a cross-sectional area which is not less, and preferably is greater, than the cross-sectional area of the inlet end of the CEP.
  • a runner which provides alloy flow from the CEP has a cross-sectional area which is not less, and preferably is greater, than the cross- sectional area of the outlet end of the CEP.
  • the arrangement is to ensure efficient working of the alloy flow system in terms of die cavity fill.
  • each of the runners may provide alloy flow to a common die cavity or to a respective die cavity.
  • the flow of alloy to the die cavity may continue along an initial flow direction.
  • the or each runner most conveniently extends laterally with respect of that direction.
  • the runner or runners may extend along a parting plane between separable parts of a die tool which defines the or each die cavity.
  • a CEP With use of a CEP, the state of an alloy in its flow therethrough is able to be modified.
  • a CEP is able to modify the state of molten alloy to a semi- solid state possessing thixotropic properties during flow through the CEP, and that semi-solid state is able to be maintained into the or each die cavity.
  • the alloy For the state of molten alloy to be changed to achieve a semi-solid state possessing thixotropic properties, it is highly desirable that the alloy have a flow velocity at the inlet end of the CEP which is close to or within a preferred range. The range varies, depending on the alloy in question.
  • the CEP inlet end flow velocity may be in excess of 60 m/s, such as from 140 to 165 m/s.
  • the CEP inlet end flow velocity preferably is in excess of 40 m/s, preferably in excess of 50 m/s, such as from 80 to 120 m/s, preferably 80 to 110 m/s.
  • the preferred range may be somewhat similar to that indicated for aluminium alloys, although the range can vary with the unique characteristics of individual alloys.
  • the CEP is to achieve a reduction in flow velocity for alloy flowing therethrough.
  • the reduction in flow velocity for magnesium, aluminium and other alloys most preferably is such as to achieve an alloy flow velocity at the outlet end of the CEP which is from about 50% to 80%, such as from 65% to 75%, of the flow velocity at the inlet end.
  • the form of a CEP can vary substantially.
  • the length of a CEP can be from about 5 to about 40 mm, such as from 5 to 20 mm and preferably about 10 to 15 mm.
  • the CEP may be of circular cross-section.
  • other cross-sections such as rectangular can be used.
  • a CEP may have an axis or centre line which is straight.
  • a CEP can, if required, have an arcuate or bent axis or centre line, such that it provides a change in direction of alloy flow therethrough.
  • the dimensions and form of a CEP can vary in accordance with a number of variables. These include the size of castings being made; the type, size and power of the machine being used; the alloy being cast; the location at which alloy flows into the die cavity, and whether or not at least a portion of the CEP is defined by a region of the die cavity; and the microstructure being sought in the article being cast.
  • the present invention is directed to providing a basis for determining the form of a CEP.
  • a CEP can provide a casting which, for at least some purposes, has an optimum microstructure substantially throughout the casting.
  • This microstructure is one characterised by fine degenerate dendrite, or rounded or spheroidal, primary particles in a matrix of secondary phase, with the primary particles less than 40 ⁇ m, such as about 10 ⁇ m or less.
  • the specific microstructure for a CEP is one exhibiting striations or bands which extend transversely with respect to the direction of alloy flow through the CEP and which result from alloy element separation.
  • a CEP able to achieve such microstructure is one capable of generating intense pressure waves in the alloy in its flow through the CEP.
  • the bands which may extend laterally across substantially the full width of the CEP and which may be spaced along substantially its full length, are found to have a wavelength of the order of 40 ⁇ m for a magnesium alloy, and of the order of 200 ⁇ m for aluminium and other alloys.
  • the separation of elements is found to result in substantial separation of primary and secondary phases, with the primary phase present as fine, rounded or spheroidal, or degenerate dendrite, particles substantially less than 40 ⁇ m in size, such as about 10 ⁇ m or less.
  • the primary phase present as fine, rounded or spheroidal, or degenerate dendrite, particles substantially less than 40 ⁇ m in size, such as about 10 ⁇ m or less.
  • alternate striations or bands are respectively aluminium-rich and magnesium-rich, due to separation of the more dense aluminium and less dense magnesium.
  • the magnesium-rich bands are relatively richer in primary phase, present as fine, rounded or spheroidal, or degenerate dendrite, particles substantially less than 40 ⁇ m in size, such as about 10 ⁇ m or less.
  • the aluminium-rich bands are found to be richer in secondary phase intermetallic particles, such as Mg ⁇ 7 AI- ⁇ 2 .
  • a metal flow system for use in pressure casting of an alloy, using a pressure casting machine having a source of supply of molten alloy
  • the system includes a mould or die tool component which defines at least part of a flow path into which molten alloy is receivable from the source of supply and along which alloy is able to flow for injection into a die cavity defined by a mould or die;
  • the mould or die tool component defines, as part of the flow path, a controlled expansion port (a CEP) which, from an inlet end to an outlet end of the CEP, increases in cross- sectional area whereby the state of alloy in its flow through the CEP is able to be modified from a molten state to achieve a semi-solid state possessing thixotropic properties and to enable the alloy in that state to flow into the die cavity; and wherein the CEP has a form such that, with solidification of alloy in the die cavity and back along the flow path into the CEP, to provide a resultant casting having a microstructure
  • the invention also provides a process for producing an article by high pressure casting, wherein molten alloy is supplied under pressure to metal flow system for flow along a flow path defined by the system to a die cavity defined by a mould or die; the flow path is defined at least in part by a mould or die tool component; and wherein the component is formed to define, as part of the flow path, a controlled expansion point (a CEP) which, from an inlet end to an outlet end of the CEP, increases in cross-sectional area whereby the state of the alloy in its flow through the CEP is modified from a molten state to achieve a semi- solid state possessing thixotropic properties and to cause the alloy to flow in that state into the die cavity; the form of the CEP being provided such that, with solidification of the alloy in the die cavity and back along the flow path into the CEP, to provide a resultant casting having a microstructure characterised by fine, degenerate dendrite, or rounded or spheroidal, primary particles in a matrix of secondary phase, alloy
  • the system and process are to be such that, if solidification of alloy in the die cavity is sufficiently rapid, the respective microstructures for the casting and for alloy solidified in the CEP are obtained. Such rapid solidification most preferably is achieved in use of the invention. However, in addition to the need for heat energy extraction from the mould or die to achieve this it can be necessary to control the temperature of the component defining the CEP such that alloy in the CEP is able to be solidified. Most conveniently, heat energy extraction is limited up-stream of the inlet end of the CEP, to enable a solid- liquid interface to be established at, or a short distance downstream from, the inlet end of the CEP.
  • the pressure casting machine with which the metal flow system of the invention is used can be of a variety of different forms. It may, for example, be a high pressure die casting machine having a nozzle or shot sleeve from which alloy is able to be injected into the metal flow system, for flow along the flow path of the system and through the CEP of the flow path, to the die cavity. Thus, the machine may be a hot- or cold-chamber die casting machine.
  • larger primary particles can form in the shot sleeve and these can be carried through into a casting.
  • volume fraction of such larger primary particles is low, although the particles can range in size from 60 ⁇ m up to 100 ⁇ m.
  • the machine may be of the type disclosed in our Australian provisional application PR7216 filed on 23 August 2001 entitled "Apparatus for Pressure Casting, in its associated Australian complete application AU-29303/02 filed 28 March 2002 and in an International (PCT) patent application (attorney reference IRN 675225) filed simultaneously with the present application.
  • provisional application PR7216, complete application AU-29303/02 and PCT application are incorporated herein by reference, and are to be read as forming part of the disclosure of the present invention.
  • a molten alloy transfer vessel having a capacity for holding a measured volume of alloy required for transfer to a die tool and sufficient to produce a given casting, or for simultaneously producing a plurality of given castings which usually are similar.
  • the alloy in the transfer vessel is able to be discharged via an outlet port by pressurising an upper region of the vessel. From such discharge port, the alloy is able to be injected into the metal flow system as described above for the other machine types.
  • the alloy has a flow velocity at the outlet end of a CEP which is close to or within a preferred range of 50 to 80%, such as 65 to 75% of the flow velocity at the inlet end of the CEP.
  • the flow velocities indicated are high relative to flow velocities used in high pressure die casting machines, particularly in the case of magnesium alloys.
  • the flow velocity of the alloy through the outlet end of the CEP preferably is 20 to 50% less, such as 25 to 35% less, than the flow velocity at or upstream of the inlet end of the CEP.
  • the outlet flow velocity may be about two-thirds of the flow velocity at or upstream of the inlet end such that, with an inlet flow velocity of about 150 m/s, the flow velocity at the outlet of the CEP is about 100 m/s.
  • the machine with which the metal flow system is used needs to have an alloy output flow rate which is consistent with these requirements or, for a given machine, the metal flow system needs to have a CEP with inlet and outlet end cross- sectional areas which are consistent with attaining the required flow velocities for the CEP from the output flow velocity for the machine.
  • the inlet and outlet cross-sectional areas of the CEP will need to be small, resulting in an extended flow time.
  • microstructure obtained in a resulting casting is unique. That microstructure is broadly detailed above, in terms of it having fine primary particles in a matrix of secondary phase, with the primary particles less than 40 ⁇ m. The primary particles not only are small, frequently about 10 ⁇ m or less, but they also are evenly distributed. Moreover, the microstructure is able to be obtained substantially fully throughout a casting produced by the process of the present invention.
  • a further more important factor is one which results from the alloy element separation which occurs in the CEP under the conditions which cause the alloy to achieve a semi-solid state possessing thixotropic properties. It is found that the microstructure of the casting reflects this separation in at least the primary particles of the casting, as with the primary particles in the striated or banded microstructure of alloy solidified in the CEP, as explained in the following.
  • the core or first part to solidify is relatively rich in the primary element.
  • the concentration of a secondary element in the surrounding molten alloy accordingly increases, due to the removal of the primary element, while the concentration of the primary element in the surrounding melt decreases.
  • the growing primary particles exhibit a graded ratio of primary to secondary element from its core or centre, with the primary element decreasing and the secondary element increasing in concentration.
  • a magnesium alloy containing aluminium such as the alloy AZ91 D
  • normal growth gives rise to primary particles which have a magnesium-rich core or centre but which, from the core or centre, have a decreasing magnesium content and an increasing aluminium content.
  • the alloy element separation resulting from the CEP in a metal flow system according to the present invention, gives rise to alloy element separation on the basis of density, and modification of the normal growth.
  • This modification results in a fluctuating variation in alloy elements from the core or centre of the primary particles which, instead of being gradual and substantially uniform, is more of a fluctuating form such as a decaying sinusoidal form.
  • the secondary element first rises, then falls and thereafter can rise again in directions outwardly from the core or centre.
  • the primary particles are low in aluminium at the core or centre but, from there, the aluminium content initially increase relative to magnesium over about an initial third of the radius of the particles, then decrease relative to magnesium over about the second third of the radius, and thereafter increase again to the outer perimeter of the particles.
  • This modification occurs in the CEP, and is able to be retained in primary particles with flow of the alloy into the die cavity.
  • the fluctuating ratio of primary and secondary alloy elements in the primary particles results from the conditions generated by the CEP.
  • Computer simulations of flow conditions through a CEP generating a striated or banded microstructure indicate that, with flow of alloy through a suitable form of CEP which achieves the indicated flow rates through the outlet of the CEP, intense pressure waves are generated in the alloy.
  • the simulations indicate that the pressure waves are at a level of about +400 MPa. It is known that pressure differences of the order of a few 100 kPa can cause separation of less and more dense elements of an alloy, such as magnesium and aluminium.
  • the computer simulations therefore point to pronounced separation, with movement of a less dense element to high pressure pulses and of a higher density element to low pressure pulses.
  • the computer simulations suggest that the intense pressure waves will have a wavelength of the order of 40 ⁇ m for a magnesium alloy. This is found to accord very closely with results achieved in practice. As indicated above, it is found that, for alloy solidified in a CEP under conditions providing for relatively rapid solidification in a die cavity, and back into the CEP, the resultant striations or bands in the microstructure of alloy solidified in the CEP have a wavelength of the order of 40 ⁇ m. That is, the spacing between centres for successive like bands, of primary element or secondary element, is of the order of 40 ⁇ m. For aluminium and other alloys, the spacing more usually is of the order of about 200 ⁇ m.
  • Figure 1 is a photomicrograph illustrating a typical microstructure obtained substantially fully throughout a casting of a magnesium alloy, produced using a metal flow system according to the present invention
  • Figure 2 is a photomicrograph illustrating a typical microstructure obtained in the CEP used in the system in which the casting illustrated in Figure 1 was produced
  • Figures 3 and 4 are a photomicrograph illustrating an aluminium alloy obtained in the CEP used in the system in which the casting illustrated in Figure 1 was produced.
  • Figure 1 is a photomicrograph illustrating a typical microstructure of a casting produced with use of the present invention, from AZ91 magnesium alloy.
  • This microstructure shows primary particles in the form of fine, rounded or spheroidal, or degenerate dendrite, cells substantially less than 10 ⁇ m in size and occupying up to 60% of the volume fraction.
  • Each primary particle contains concentration rings showing a fluctuating, sometimes somewhat decaying sinusoidal, ratio of constituent alloy elements.
  • there is solidified metal of eutectic composition with the fineness of the eutectic structure difficult to resolve despite the level of magnification used.
  • Figure 2 is a photomicrograph of the microstructure of AZ91 magnesium alloy solidified in a CEP, in producing a casting such as illustrated in Figure 1.
  • the direction of alloy flow through the CEP is shown by an arrow.
  • the photomicrograph shows banding or striations extending transversely with respect to the flow direction. While not very readily discernible in this instance, the bands or striations as shown by X-ray analysis using secondary electron microscopy result from segregation of the parent metal magnesium and alloy additive elements such as aluminium. This segregation is believed to occur due to intense pressure waves generated in the CEP by the reduction in alloy flow velocity as it flows through the CEP. The dynamic environment provided by the pressure waves is believed to lead to nucleation of primary particles of the parent metal at relatively high temperatures.
  • Alternate bands are found to have a higher percentage of parent metal and a higher solidification temperature than would be expected for the starting alloy, relative to primary particles obtained in sprue/runner metal obtained by conventional pressure die casting.
  • the secondary phase rich intervening bands have a higher percentage of alloy elements and a lower solidification temperature than expected for the alloy, relative to secondary phases obtained in sprue/runner metal of conventional die casting.
  • the microstructure is characterised by fine primary particles substantially smaller than 10 ⁇ m in a secondary phase matrix, with a banding wavelength of about 40 ⁇ m.
  • Figure 3 is a photomicrograph illustrating a typical microstructure of a casting produced with use of the present invention, from CA313 aluminium alloy.
  • FIG. 4 is a photomicrograph of the microstructure of CA313 aluminium alloy which solidifies in a CEP in producing a casting such as illustrated in Figure 3.
  • the direction of alloy flow through the CEP again is shown by an arrow.
  • the microstructure shows banding or striations extending transversely with respect to the flow direction.
  • the microstructure overall is similar to that of Figure 2, except that the primary particles are of the parent metal aluminium, rather than magnesium, while the banding or striations are more evident and the darker bands richer in secondary phase eutectic show a band wavelength of about 200 ⁇ m. Successive secondary phase darker bands are highlighted by an array of parallel arrows extending transversely with respect to the flow direction.
  • the metal flow system of the present invention enables the production of quality castings of a wide range of suitable alloys, which have a number of practical benefits. These include low levels of porosity, good surface finish, low levels of cast metal needing to be recycled, and the production of castings of a wide range of wall thicknesses.
  • the modification of alloy flow produced by the CEP of a metal flow system according to the present invention achieves filling of a die cavity by alloy flow which differs from that obtained in conventional high pressure die casting.
  • the alloy flow in the die cavity progresses away from the inlet to the die cavity as a semi-solid front, rather than as a jet which issues from a gate in conventional die casting arrangements to a remote region of the die cavity.
  • the semi-solid front progresses to remote regions of the die cavity, in a manner which varies with the form of the die cavity, to achieve filling of all regions.
  • overflow metal amounts to only a small proportion of the weight of alloy supplied to the die cavity. Indeed, it generally is only with castings of a form in which alloy flow in the die cavity proceeds on two fronts which join together that an overflow is likely to be necessary, since a pocket of gas otherwise can be trapped between the fronts. However, to avoid such gas pocket, only a small overflow to enable venting of the gas is likely to suffice.
  • the present invention enables use of a metal flow path which generally gives rise to metal solidified therein which is substantially less than 30% of the casting weight, and frequently less than 5% of that weight.
  • the low porosity of castings able to be produced by the present invention also has benefits for the surface finish of resultant castings. That is, the attainment of a good surface finish, substantially free of pores, is facilitated.
  • a further practical importance of the invention is that it enables the production of castings of thick wall sections, of very thin wall sections and combinations of thick and very thin wall sections.
  • the wall thickness can be from about 0.5 mm upwards. Parts thinner than 0.5 mm can be cast, but shape and length may be limiting factors.
  • the microstructure able to be obtained in castings produced by use of the present inventions is an optimum for at least some applications. This applies where the physical properties required in the casting are enhanced by the avoidance of the normal dendrite form of the primary phase and the very fine, uniform particle size of the microstructure. Due to these factors, the castings have good strength characteristics. However, the properties are able to be further enhanced or modified, by subjecting the casting to a suitable tempering or ageing heat treatment.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Abstract

L'invention concerne un système de coulée de métal utilisé pour couler un alliage sous pression à l'aide d'une machine à couler sous pression comprenant une source d'alimentation de métal fondu. Ledit système comprend un composant de moule ou d'outil matrice définissant au moins une partie de chemin d'écoulement pouvant recevoir le métal fondu à partir de la source d'alimentation, et le long duquel un alliage peut s'écouler pour être injecté dans une cavité de matrice définie par un moule ou une matrice. Le composant de moule ou d'outil matrice définit, comme étant une partie du chemin d'écoulement, un orifice d'expansion contrôlée (CEP) dont la coupe transversale augmente d'une extrémité d'entrée à une extrémité de sortie du CEP, ce qui permet de faire passer l'alliage pendant son écoulement à travers le CEP d'un état fondu à un état semi-solide possédant des propriétés thixotropiques et de couler ledit alliage dans la cavité de matrice. Le CEP présente une forme telle que la solidification de l'alliage dans le cavité de matrice et son retour dans le chemin d'écoulement dudit CEP produit une coulée résultante à microstructure caractérisée par de fines particules primaires dendritiques dégénérées ou sphéroïdales ou arrondies dans une matrice de phase secondaire. L'alliage solidifié dans le CEP est caractérisé par des stries ou des bandes s'étendant transversalement par rapport à l'écoulement de l'alliage dans ledit CEP, les bandes résultant de la séparation d'éléments d'alliage et des bandes alternées étant relativement riches en éléments respectifs et respectivement dans des phases primaire et secondaire.
PCT/AU2002/001139 2001-08-23 2002-08-23 Systeme de coulee de metal Ceased WO2003018235A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
AUPR7218A AUPR721801A0 (en) 2001-08-23 2001-08-23 Metal flow system
AUPR7218 2001-08-23
AU29307/02A AU2930702A (en) 2001-08-23 2002-03-28 Metal flow system
AU29307/02 2002-03-28

Publications (1)

Publication Number Publication Date
WO2003018235A1 true WO2003018235A1 (fr) 2003-03-06

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WO (1) WO2003018235A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1670605A4 (fr) * 2003-08-15 2006-12-06 Commw Scient Ind Res Org Systeme d'ecoulement pour moulage sous pression
CN107199321A (zh) * 2017-06-02 2017-09-26 重庆大学 一种时变控制半固态成形工艺

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995034393A1 (fr) * 1994-06-14 1995-12-21 Cornell Research Foundation, Inc. Procede et appareil de moulage par injection de metaux semi-solides
WO2002016062A1 (fr) * 2000-08-25 2002-02-28 Commonwealth Scientific And Industrial Research Organisation Coulage sous pression d'aluminium
WO2002030596A1 (fr) * 2000-10-13 2002-04-18 Commonwealth Scientific And Industrial Research Organisation Dispositif de coulage sous haute pression

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995034393A1 (fr) * 1994-06-14 1995-12-21 Cornell Research Foundation, Inc. Procede et appareil de moulage par injection de metaux semi-solides
WO2002016062A1 (fr) * 2000-08-25 2002-02-28 Commonwealth Scientific And Industrial Research Organisation Coulage sous pression d'aluminium
WO2002030596A1 (fr) * 2000-10-13 2002-04-18 Commonwealth Scientific And Industrial Research Organisation Dispositif de coulage sous haute pression

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1670605A4 (fr) * 2003-08-15 2006-12-06 Commw Scient Ind Res Org Systeme d'ecoulement pour moulage sous pression
CN107199321A (zh) * 2017-06-02 2017-09-26 重庆大学 一种时变控制半固态成形工艺
CN107199321B (zh) * 2017-06-02 2018-11-06 重庆大学 一种时变控制半固态成形工艺

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