EP0185540A2 - Procédé pour l'affinage du grain de silicium primaire dans les alliages hypereutectiques Al-Si - Google Patents

Procédé pour l'affinage du grain de silicium primaire dans les alliages hypereutectiques Al-Si Download PDF

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Publication number
EP0185540A2
EP0185540A2 EP85309176A EP85309176A EP0185540A2 EP 0185540 A2 EP0185540 A2 EP 0185540A2 EP 85309176 A EP85309176 A EP 85309176A EP 85309176 A EP85309176 A EP 85309176A EP 0185540 A2 EP0185540 A2 EP 0185540A2
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EP
European Patent Office
Prior art keywords
grain
refining
melt
aluminum
particles
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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.)
Withdrawn
Application number
EP85309176A
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German (de)
English (en)
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EP0185540A3 (fr
Inventor
Masahiro C/O Sumitomo Light Yoshida
Kazuyoshi C/O Sumitomo Light Oka
Yasuo C/O Sumitomo Light Ohfukune
Susumu C/O Sumitomo Light Inumaru
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.)
Sumitomo Light Metal Industries Ltd
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Sumitomo Light Metal Industries Ltd
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Publication date
Priority claimed from JP26690384A external-priority patent/JPS61147860A/ja
Priority claimed from JP14966885A external-priority patent/JPS6210248A/ja
Application filed by Sumitomo Light Metal Industries Ltd filed Critical Sumitomo Light Metal Industries Ltd
Publication of EP0185540A2 publication Critical patent/EP0185540A2/fr
Publication of EP0185540A3 publication Critical patent/EP0185540A3/fr
Withdrawn legal-status Critical Current

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    • 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
    • B22D11/10—Supplying or treating molten metal
    • B22D11/11—Treating the molten metal
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/02—Making non-ferrous alloys by melting
    • C22C1/026—Alloys based on aluminium

Definitions

  • the present invention relates to a method of refining grains of primary silicon in hypereutectic aluminum-silicon alloys upon solidification of the melt.
  • Al-Si systems have been widely used for their high fluidity in a molten state and their low shrinkage upon solidification.
  • hypereutectic Al-Si alloys having a high silicon content have been suitably applied as casting alloys which are excellent in wear resistance.
  • the obtained cast ingot tends to have a coarse-grain structure, exhibiting reduced toughness.
  • phosphorus is generally added to a hypereutectic Al-Si melt for the purpose of refining the primary phase of silicon.
  • the addition of phosphorus produces compounds of AlP, which have a nucleation behavior in such a way as to promote the grain refinement of the primary silicon.
  • the aforementioned addition of phosphorus to the melt of hypereutectic Al-Si alloy systems is conventionally achieved by introducing into the Al-Si melt accommodated in a holding furnace, a suitable grain-refining agent to refine the primary silicon, for example, a grain refiner in the form of Cu-8%P or Cu-15%P master alloy, or a flux containing phosphorus.
  • a suitable grain-refining agent to refine the primary silicon for example, a grain refiner in the form of Cu-8%P or Cu-15%P master alloy, or a flux containing phosphorus.
  • this manner of introduction- of a grain refiner directly into the holding furnace suffers difficulty in attaining uniform or even distribution of phosphorus throughout the entire mass of the Al-Si melt in the holding furnace. Further, the direct introduction method is not satisfactory for its low yield of phosphorus introduced in the furnace.
  • phosphorus since the amount of phosphorus to be introduced is considerably small with respect to the volume of the molten alloy mass, phosphorus is likely to be locally concentrated in the melt in the furnace even if the melt is stirred. Further, phosphorus may not be effectively utilized because of its partial sedimentation on the bottom of the furnace or its floating to the liquid surface while the melt is stirred.
  • the grain-refining effect of phosphorus is varied with a pouring time of the melt. Namely, a bottom part of the obtained ingot which is formed of an initially poured portion of the melt, tends to have a different grain size of the primary silicon, from that of a part of the ingot which is formed of a portion of the melt which is introduced later in the furnace. Consequently, the property of the ingot as an end product is varied from one part to another.
  • the grain-refining effect of phosphorus as a grain refiner for primary silicon is high enough for the initially poured portion of the melt, but the effect is reduced with a time lapse after the phosphorus addition to the melt, whereby the primary silicon in the subsequently cast part of the ingot is given a larger grain size than the initially cast part. That is, the grain refiner added to the melt is not sufficiently effective for the terminal portion of the melt mass.
  • a method of refining grains of primary silicon of a hypereutectic aluminum-silicon alloy which is cast into an ingot by introducing a melt of the alloy into a casting mold from a holding furnace which accommodates the melt, comprising the step of introducing a grain-refining agent for primary silicon containing phosphorus, continuously into a flow of the melt from the holding furnace to the casting mold through a passage communicating with the furnace and the mold, and thereby refining the grains of the primary silicon in the hypereutectic aluminum-silicon alloy, upon solidification of the melt in the casting mold.
  • the aforementioned method of the present invention requires the grain-refining agent to be continuously fed into a continuous flow of the melt from the furnace through the pouring passage, so that a suitable amount of the grain-refining agent is applied to a unit volume of the melt.
  • the instant method makes it possible to distribute the grain-refining agent evenly throughout the mass of the hypereutectic aluminum-silicon alloy melt, whereby phosphorus of the added grain-refining agent may be used in effect with an improved yield.
  • the continuous addition of the grain-refining agent to the melt is effected a comparatively short time before the melt is poured into the casting mold. Therefore, the grain-refining effect of phosphorus is maintained at a relatively high level, and the time between the addition of phosphorus and the pouring of the melt into the mold is held constant.
  • the instant method overcomes the conventionally experienced inconvenience that the obtained ingot suffers variations in property from one part to another, due to reduction of the grain-refining effect of the agent with a time lapse after the addition of the agent until individual portions of the melt mass are poured into the casting mold.
  • the grain-refining agent consists of a mass of particles containing phosphorus
  • the method further comprises the step of charging an aluminum tube having a small diameter with the particles of the grain-refining agent to prepare a grain-refining rod for primary silicon.
  • the leading end of the aluminum tube is located in the flow of the melt flowing through the passage, to thereby distribute the grain-refining agent in the melt of the hypereutectic aluminum-silicon alloy.
  • the grain-refining agent in the form of particles containing phosphorus is continuously introduced into a continuous flow of the melt from the furnace into the mold, by holding the currently leading end of the grain-refining rod in the flow of the melt.
  • This arrangement permits uniform distribution of the grain-refining agent throughout the mass of the melt.
  • the grain-refining agent consists of a mass of particles containing phosphorus, which particles are mixed with a mass of aluminum particles or an aluminum matrix.
  • the method further comprises the step of charging an aluminum shell with a mixture of the particles of the grain-refining agent and the aluminum particles or the aluminum matrix, so as to prepare a grain-refining rod.
  • the leading end of the grain-refining rod is located in the flow of the melt flowing through the passage, to thereby distribute the grain-refining agent in the melt of the hypereutectic aluminum-silicon alloy.
  • the grain-refining rod is disposed so that its leading end is located in the continuous flow of the melt from the furnace into the mold.
  • the grain-refining rod consists of a mixture of the grain-refining agent and a mass of aluminum particles or an aluminum matrix, and an aluminum shell which is charged with the mixture.
  • the outer aluminum shell of the grain-refining rod contributes to easy melting of the rod in the aluminum-silicon melt. Further, since the grain-refining agent in the form of particles is distributed in the aluminum particles or aluminum matrix, the wettability of the grain-refining agent with respect to the molten hypereutectic aluminum-silicon alloy is increased. Accordingly, the grain-refining agent such as copper-phosphorus alloy particles or phosphorus particles may be efficiently distributed and melted in the Al-Si melt. Since such grain-refining agent is surrounded by the aluminum particle mass or aluminum matrix and further covered by the aluminum shell, a loss of the agent due to its oxidization is minimized, whereby the yield of the agent is improved.
  • the present method generally uses particles (powder) of C u-P alloys, or fluxes, for example of ALPO 4 or a combination of red or yellow phosphorus and chloride such as KCl.
  • the content of phosphorus of the Cu-P alloy is suitably selected, so as to give the finally processed grain-refining rod a suitable strength for easy positioning and orientation of the rod in the flow of the aluminum-silicon melt. It is generally recommended that the content of phosphorus of the Cu-P alloy be held within a range between 0.5% and 15%, by weight, preferably about 8% by weight at which the eutectic phase of the Cu-P alloy is established. With the content of phosphorus exceeding 15% by weight, phosphorus vaporizes and a Cu-P alloy can not exist.
  • the grain-refining rod containing phosphorus and aluminum may be preferably prepared with one of the following two methods:
  • a mixture mass is similarly obtained by mechanically mixing particles of the grain-refining agent and the aluminum particles.
  • This mixture mass is compacted, so that the compacted mass is subsequently inserted into a suitable hollow billet or pipe which is made of aluminum.
  • the hollow billet charged with the compacted body of the above-indicated mixture of particles is closed at its opposite ends and is then subjected to a hot-extruding process at a temperature of 350-500 o C.
  • a desired grain-refining rod is obtained.
  • the aluminum particles are formed into an integral aluminum matrix body.
  • the obtained grain-refining rod contains the particles of the grain-refining agent such that they are distributed within the aluminum matrix.
  • the grain sizes and forms of Cu-P alloy particles or phosphorus particles used as a grain-refining agent, and of aluminum particles mixed with such grain-refining particles, and the diameter and shape of the grain-refining rod to be prepared, are suitably selected depending upon: a rate of feed of the grain-refining rod into the flow of the aluminum-silicon alloy melt; a casting method; a size of an ingot to be cast; a kind of aluminum-silicon alloy; a distance between the location of the leading end of the rod and the casting mold; and other conditions.
  • the grain-refining rod may have any suitable cross sectional shapes other than a circular shape.
  • the grain-refining rod may be provided in the form of a strip or tape.
  • the thus prepared grain-refining rod which contains a grain-refining agent for refining primary silicon in a hypereutectic aluminum-silicon alloy, is continuously fed by suitable means into the melt of the hypereutectic Al-Si alloy while it is flowing through a passage leading to a casting mold.
  • FIG. 1 a casting system, wherein reference numeral 10 designates a holding furnace for holding a melt 12 of a hypereutectic aluminum-silicon alloy having a silicon content exceeding the eutectic point but not exceeding 30% by weight.
  • the holding furnace 10 has an outlet 14 through which the alloy melt 12 is led into a passage in the form of a pouring trough 16.
  • the melt 12 flowing through the pouring trough 16 is introduced into a casting mold 20 through a spout 18 formed at the end of the trough 16.
  • the molten hypereutectic Al-Si alloy is continuously cast into an intended ingot 22.
  • a grain-refining agent containing phosphorus (P) is added to a mass 15 of the melt 12 flowing through the trough 16, in order to refine grains of primary silicon in the hypereutectic Al-Si alloy.
  • the grain-refining agent is supplied in the form of a grain-refining rod 26 which consists of a mass of particles 30 of a Cu-8%P alloy, and an aluminum tube 31 which has a wall thickness of 0.5-2 mm and an outside diameter of 5-15 mm.
  • the bore of the aluminum tube 31 is filled or charged with the mass of Cu-8%P alloy particles 30 in a relatively dense manner, as shown in Fig. 2.
  • the grain-refining rod 26 is wound as a coil 2 4, and is continuously fed by a feeding device 28 into a continuous flow of the melt mass 15 in the pouring trough 16, as illustrated in Fig. 1, so that the leading end of the grain-refining rod 26 is held in the flow of the melt mass 15.
  • the leading end of the rod 26 located within the melt mass 15, the corresponding leading portion of the aluminum tube 31 is melted under heat of the melt mass 15, while the mass of Cu-8%P particles 30 within the tube 31 is melted into the flow of the melt 15.
  • the grain-refining rod 26 is continuously fed into the melt mass 15 at a rate which corresponds to a flow rate of the melt mass 15 from the furnace 10 toward the casting mold 20. In this manner, the grain-refining agent 30 accommodated in the aluminum tube 31 is introduced into a continuous flow of the melt mass 15 through the pouring trough 16.
  • the amount of feed of the grain-refining particles 30 per unit volume of the melt mass 15 may be adjusted by changing the diameter and/or feed rate of the rod 26, so that the effective concentration of phosphorus in the melt mass 15 is held within a range of 10-1000 ppm.
  • the location at which the currently leading end of the grain-refining rod 26 is positioned within the melt mass 15 in the trough 16, is selected so that the rod 26 is sufficiently melted in the melt mass 15 to permit the grain-refining agent 30 to give an intended grain-refining or nucleation effect. While the location is generally determined by the form and composition of a grain-refining agent used, the present embodiment is adapted to locate the leading end of the rod 26 at a position near the outlet 14 of the holding furnace 10, at which the temperature of the melt mass 15 is comparatively high, and from which it takes more than one minute for the melt mass 15 to leave the trough 16.
  • the leading end of the grain-refing rod 26 is preferably located upstream of such a degasing device, as viewed in the direction of flow of the melt mass 15, so that the grain-refining agent 30 introduced into .the melt mass 15 may be effectively distributed by the degasing device.
  • the present method comprises a step of introducing the grain refiner or grain-refining agent 30, in a continuous fashion by a small amount per unit time, into the melt mass 15 of hypereutectic Al-Si alloy which is flowing through the pouring trough 16.
  • This arrangement is effective to avoid inconveniences of sedimentation and/or floating of the grain-refining agent within the holding furnace 10, which are encountered in a conventional batch method in which a required total amount of the grain-refining agent 30 is introduced at one time into the mass of the melt 12 in the furnace 10. Consequently, the manner of introducing the grain-refining agent 30 according to the present method can make an effective use of the agent 30, and permits an improved yield of the agent.
  • the grain-refining agent 30 particles of Cu-8%P alloy
  • the agent 30 is uniformly or evenly distributed throughout the flowing mass 15, whereby the concentration of phosphorus (P) is kept constant at an optimum level.
  • the instant method is adapted to introduce the grain-refining agent 30 into the melt mass 15 which will be poured into the casting mold 20 in a relatively short time, the agent 30 maintains its intended grain-refining effect until the melt mass 15 is poured into the mold 22. Further, a time between the addition of the agent 30 to a given portion of the melt mass 15 and the pouring of that portion into the mold 20 is held constant. This constant time lapse contributes to improved grain refinement of the primary silicon in the Al-Si alloy, and to prevention of a variation in the degree of refinement between the bottom (leading) and top (trailing) parts of the ingot 22 which correspond to initially and finally poured portions of the melt 12.
  • the mass of the grain-refining agent 30 is introduced into the melt mass 15 while the agent 30 is covered with the annular wall of the aluminum tube 31.
  • This aluminum tube 31 protects the agent 30 from oxidization due to heat from the melt mass 15 immediately before the agent 30 is delivered into the mass 15.
  • the agent 30 is provided in the form of particles, the agent 30 is rapidly melted into the melt mass 15 and evenly distributed after the leading portion of the aluminum tube 31 has been melted.
  • the grain-refining rod 2C may be easily fed by a suitable feeding device as indicated at 28 in Fig. 1. Since the rod 26 is stored as a coil, it is easily handled.
  • the grain-refining agent 30 in the form of Cu-8%P alloy particles was. introduced into the flow of the melt mass 15 of a hypereutectic Al-18%Si alloy in the pouring trough 16, which was cast into the ingot 22 having a diameter of 200 mm.
  • the same grain-refining. agent 30 was introduced into the holding furnace 10 in a batch manner.
  • the agent 30 was added so that the effective concentration of phosphorus in the melt 12 or 15 was 100 ppm. Table 1 shows the results of the above experiment.
  • the present method provides a higher yield percent of phosphorus, and permits a smaller grain size and a less variation in the grain size between the bottom and top parts of the ingot 22, as compared with the known batch method.
  • modified grain-refining rods 32 and 40 which are used in modified embodiments of the present invention. Like the grain-refining rod 26 used in the preceding embodiment, these grain-refining rods 32, 40 also contain particles 34 of a suitable grain-refining agent such as a Cu-8%P alloy.
  • the grain-refining rod 32 of Fig. 3 consists of a mixture of the grain-refining particles 34 and an aluminum matrix 36, and an aluminum shell in the form of an aluminum tube 38 (having a wall thickness of 0.5-2 mm and an outside diameter of 5-15 mm).
  • the aluminum tube 36 is charged with the mixture mass 34, 38 such that the particles 34 are distributed in the aluminum matrix 36.
  • the grain-refining rod 40 of Fig. 4 consists of a mixture of the grain-refining particles 34 and aluminum particles 42, and an aluminum shell 44 which is charged with the mixture of the particles 34, 42.
  • the grain-refining agent in the form of the particles 34 which are distributed in the aluminum matrix 36 or in the aluminum particle mass 42, are added to the melt mass 15 by locating the leading end cf the grain-refining rod 32, 40 into a flow of the melt mass 15. Therefore, the grain-refining agent 34 is given improved wettability with respect to the melt of the aluminum-silicon alloy, and is rapidly distributed and melted in the melt 15.
  • the present method makes it possible to introduce the grain-refining agent at a relatively low temperature of the aluminum-silicon alloy melt, for example, in the neighbourhood of 720°C. Further, the present method provides considerable improvements in the yield and distribution uniformity of phosphorus of the grain refiner, and permits improved uniformity of the grain size of the primary silicon throughout the entire mass of the cast aluminum-silicon ingot, from its bottom to its top.
  • the grain-refining agent 34 is protected from oxidation, by the aluminum matrix 36 or aluminum particles 42, and by the aluminum shell 38, 44. In this sense, the yield of phosphorus added to the Al-Si melt is further improved.
  • a grain-refining agent in the form of particles of a Cu-8%P master alloy was introduced into the melt of the hypereutectic Al-18%P alloy, according to the known method, and according to the two different methods of the invention using the grain-refining rods of Figs. 2 and 3, respectively.
  • a required total amount of the grain-refining agent was introduced at one time into the holding furnace 10.
  • the grain-refining rod 26 with the aluminum tube 31 charged with the Cu-8%P alloy particles 30 was continuously fed into a continuous flow of the melt mass 15, as shown in Fig. 1.
  • the Al-18%Si alloy ingots 22 obtained according to the aforementioned three different methods were examined in terms of yield percent of phosphorus, and grain size of the primary silicon in the bottom, intermediate and top parts of the ingots 22. The results of examination are indicated in Table 2. In all of the three methods, the grain-refining agent was introduced so that the effective concentration of phosphorus in the melt 12 or 15 was 100 ppm.
  • the method of the present invention practiced by using the grain-refining rod 32 of Fig. 3 which contains the Cu-P alloy particles in the aluminum matrix exhibited considerably better results than the method by using the rod 26 of Fig. 2, as well as than the conventional batch method, in terms of the yield of phosphorus, grain-refining capability and uniformity of grain size of the primary silicon between the bottom and top parts of the cast ingot.
  • Cu-15%P and other compositions may be used as a grain-refining agent for refining the primary silicon according to the invention.
  • the grain-refining agent in such an alloy form is desired for elimination of otherwise required removal of a reaction residue, it is possible to use a grain-refining agent in the form of a flux containing phosphorus. If the grain-refining agent is provided in the form of particles, it can be directly added to the melt from the furnace, by using a suitable device such as a vibration feeder.
  • the illustrated embodiments are adapted to locate the leading end of the grain-refining rod at a position in the trough near the outlet of the furnace, the location at which the grain-refining agent is added may be suitably selected depending upon the composition and the form of the grain-refining agent.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Continuous Casting (AREA)
  • Silicon Compounds (AREA)
EP85309176A 1984-12-18 1985-12-17 Procédé pour l'affinage du grain de silicium primaire dans les alliages hypereutectiques Al-Si Withdrawn EP0185540A3 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP26690384A JPS61147860A (ja) 1984-12-18 1984-12-18 過共晶Ａｌ−Ｓｉ系合金における初晶Ｓｉの微細化方法
JP266903/84 1984-12-18
JP14966885A JPS6210248A (ja) 1985-07-08 1985-07-08 過共晶Ａｌ−Ｓｉ系合金における初晶Ｓｉの微細化方法
JP149668/85 1985-07-08

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EP0185540A2 true EP0185540A2 (fr) 1986-06-25
EP0185540A3 EP0185540A3 (fr) 1987-05-27

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989001986A1 (fr) * 1987-08-25 1989-03-09 Dnepropetrovsky Metallurgichesky Institut Imeni L. Procede pour raffiner des alliages d'aluminium
EP0592665A4 (fr) * 1990-10-31 1993-11-19 Sumitomo Electric Industries Poudre a base d'un alliage aluminium/silicium hypereutectique et production de cette poudre.
DE4328040C1 (de) * 1993-08-20 1994-12-15 Schaefer Chem Fab Gmbh Verfahren zum Herstellen eines Kornfeinungsmittels für Aluminium-Silizium-Gußlegierungen
WO1995031578A1 (fr) * 1994-05-12 1995-11-23 Anglo Blackwells Limited Procede de production d'une composition contenant du phosphore
GB2299099A (en) * 1995-03-18 1996-09-25 Christopher Duncan Mayes Process for producing grain refining master alloys.
EP1111079A1 (fr) * 1999-12-20 2001-06-27 Alcoa Inc. Alliage d'aluminium sursaturé
CN113528868A (zh) * 2021-07-06 2021-10-22 常州大学 一种利用熔体净化作用消除过共晶铝硅合金中初生硅的方法
CN113787183A (zh) * 2021-08-13 2021-12-14 常州大学 一种获得铝硅合金伪共晶组织的装置与方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3836360A (en) * 1972-07-10 1974-09-17 Anaconda Co Method and apparatus for pre-heating and adding master alloy to a copper melt
FR2228111A1 (fr) * 1973-05-01 1974-11-29 Nippon Kokan Kk
GB2078784A (en) * 1980-06-27 1982-01-13 British Aluminium Co Ltd Alloying Additive

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3836360A (en) * 1972-07-10 1974-09-17 Anaconda Co Method and apparatus for pre-heating and adding master alloy to a copper melt
FR2228111A1 (fr) * 1973-05-01 1974-11-29 Nippon Kokan Kk
GB2078784A (en) * 1980-06-27 1982-01-13 British Aluminium Co Ltd Alloying Additive

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
ALUMINUM, vol. I: Properties, Physical Metallurgy and Phase Diagrams, pages 293-299; chapter 8, Commercial Casting Alloys; Aluminum-Silicon Alloys; edited by K. R. VAN HORN; American Society for Metals, Metals Park, Ohio, US *
GIESSEREI-PRAXIS, no. 4, 1981, pages 61-66; E. BRUNHUBER: "K und Langzeit- Veredelung von Aluminium-Silicium-Gusslegierungen" *

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989001986A1 (fr) * 1987-08-25 1989-03-09 Dnepropetrovsky Metallurgichesky Institut Imeni L. Procede pour raffiner des alliages d'aluminium
GB2220214A (en) * 1987-08-25 1990-01-04 Dn Metall Inst Method for refining aluminium alloys
GB2220214B (en) * 1987-08-25 1990-12-19 Dn Metall Inst Process for refining aluminium alloys
EP0592665A4 (fr) * 1990-10-31 1993-11-19 Sumitomo Electric Industries Poudre a base d'un alliage aluminium/silicium hypereutectique et production de cette poudre.
EP0592665A1 (fr) * 1990-10-31 1994-04-20 Sumitomo Electric Industries, Ltd. Poudre a base d'un alliage aluminium/silicium hypereutectique et production de cette poudre
DE4328040C1 (de) * 1993-08-20 1994-12-15 Schaefer Chem Fab Gmbh Verfahren zum Herstellen eines Kornfeinungsmittels für Aluminium-Silizium-Gußlegierungen
WO1995031578A1 (fr) * 1994-05-12 1995-11-23 Anglo Blackwells Limited Procede de production d'une composition contenant du phosphore
GB2299099A (en) * 1995-03-18 1996-09-25 Christopher Duncan Mayes Process for producing grain refining master alloys.
EP1111079A1 (fr) * 1999-12-20 2001-06-27 Alcoa Inc. Alliage d'aluminium sursaturé
CN113528868A (zh) * 2021-07-06 2021-10-22 常州大学 一种利用熔体净化作用消除过共晶铝硅合金中初生硅的方法
CN113787183A (zh) * 2021-08-13 2021-12-14 常州大学 一种获得铝硅合金伪共晶组织的装置与方法
CN113787183B (zh) * 2021-08-13 2023-01-17 常州大学 一种获得铝硅合金伪共晶组织的装置与方法

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