EP0886683B1 - Alliage thixotrope aluminium-silicium-cuivre pour mise en forme a l'etat semi-solide - Google Patents
Alliage thixotrope aluminium-silicium-cuivre pour mise en forme a l'etat semi-solide Download PDFInfo
- Publication number
- EP0886683B1 EP0886683B1 EP97914379A EP97914379A EP0886683B1 EP 0886683 B1 EP0886683 B1 EP 0886683B1 EP 97914379 A EP97914379 A EP 97914379A EP 97914379 A EP97914379 A EP 97914379A EP 0886683 B1 EP0886683 B1 EP 0886683B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- alloy
- silicon
- semi
- alloys
- copper
- 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
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
- C22C21/04—Modified aluminium-silicon alloys
-
- 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
- C22C1/12—Making non-ferrous alloys by processing in a semi-solid state, e.g. holding the alloy in the solid-liquid phase
Definitions
- the invention relates to the field of aluminum-silicon-copper alloys, which can possibly contain other additives such as magnesium, cast in the form of billets having a globular solidification structure conferring thixotropic properties and intended to be shaped, by forging or injection under pressure, after reheating in the semi-solid state.
- Such shaping is known as thixoforming
- Thixoforming developed from the discovery made in the early years 1970 by the team of Pr FLEMINGS at MIT that a metal, developed in some particular conditions, presents, when it is reheated in the semi-solid state, a apparent viscosity which strongly depends on the shear rate, so that it behaves like a solid during handling and like a liquid viscous when injected into a mold. This property leads, compared to traditional shaping processes, better metallurgical quality of parts produced, higher production rates, less wear of tools and molds and energy saving.
- the solidification of the metal with thixoforming must lead to a structure globular, not dendritic, which can be obtained either by mechanical agitation of the solid-liquid mixture as in US Patent 3,948,650 of the MIT, either by mixing electromagnetic as in US patents 4434837 and US 4457355 of ITT-ALUMAX or the patents EP 0351327 and EP 0439981 of ALUMINUM PECHINEY.
- the billets thus cast are cut into pieces corresponding to the quantity of metal necessary for the manufacture of the part to be formed, these pieces being heated to the semi-solid state, usually by induction heating, and transferred to shaping equipment (forging press or pressure injection machine).
- alloys intended for thixoforming to increase the resistance of the parts produced, or to facilitate machining, tried to use alloys containing 1 to 5% copper. With for example a alloy with 3% copper, no particular problem is encountered with the casting of billets, and the mechanical resistance at the level of the billet is effectively improved more than 25%. If the reheating temperature is adjusted to the semi-solid state, by lowering it by a few degrees C, to stay at a liquid fraction rate close to 50%, the thixoforming of this alloy is also easy.
- the invention aims to find a field of composition of aluminum-silicon alloys more than 5% silicon and containing 1 to 5% copper allowing get out of the dilemma set out above, i.e. allow both thixoforming without problem and to obtain parts having a high mechanical resistance and a good elongation.
- the subject of the invention is the use of an aluminum alloy of composition (% by weight): If: 5% - 7.2% Cu: 1% - 5% Mg ⁇ 1% Zn ⁇ 3% Fe ⁇ 1.5% other elements ⁇ 1% each and 3% in total, aluminum remains, such as:% Si ⁇ 7.5 - (% Cu / 3), for forming in the semi-solid state, at a rate of liquid fraction included between 35% and 55%, and with, in this state, a structure free of polyhedral crystals not remelted silicon.
- the single figure represents, in a diagram having for abscissa the content of silicon and for ordinate the copper content, the lines of equal eutectic fraction and the composition domain according to the invention.
- the alloys according to the invention remain in the usual composition ranges of AlSiCu molding alloys. We do not go below 5% silicon because the alloy becomes difficult to flow.
- the addition of copper has a significant effect on the mechanical strength and the machinability only from a content of approximately 1% and, beyond 5%, there is a very unfavorable effect on the elongation .
- Magnesium in a content of less than 1%, increases the response to heat treatment thanks to the formation of hardening particles Mg 2 Si, but, beyond 1%, there is also an unfavorable effect on the elongation.
- a eutectic silicon modifier such as sodium, strontium or antimony, which prevents the formation of coarse grains of silicon Sodium and strontium can be present alone or together, antimony being always alone.
- strontium for example, the content is between 0.005 and 0.05%.
- titanium up to 0.2% and / or boron up to 0.1%, allows a refinement of the grain and a better heat resistance.
- an alloy Ai-Si6Cu3Mg0,6 or a Al-Si6,5Cu1,5Mg0,6 alloy have a thixoforming behavior identical to that of an Al-Si7Mg0.6 alloy, that is to say that a rate of liquid fraction close to 50% with a complete fusion of the eutectic, and therefore a absence of polyhedral silicon crystals.
- the metal loss was 8 ⁇ 2%, identical to that of the alloy Ai-Si7Mg0.6.
- the apparent viscosity of pieces heated at a temperature between 2 and 5 ° C. above the eutectic plateau was measured, using a penetration test consisting in measuring the resistance to deformation F of the heated piece compressed by a tool at constant speed at the end of a stroke of determined length.
- the ratio of this force F to a constant threshold force F s is established , for a conventional value of metal loss by exudation of 8%, the metal loss being an indicator of the rate of liquid fraction for a given material.
- the rate of liquid fraction is controllable to within ⁇ 5%, taking into account the usual silicon content intervals allowed by the standards and specifications for the alloys considered, it can be estimated that, in the figure, the composition of the alloy must be such that the Si and Cu contents satisfy the relation: (2) 6.5 -% Cu / 3 ⁇ % Si ⁇ 7.5 -% Cu / 3 which corresponds to the fact that the rate of liquid fraction obtained with complete fusion of the eutectic is between 45 and 55%, or that the eutectic fraction of the alloy is between 45 and 55%.
- the thixoforming behavior is poor: as soon as the filling of the mold cavity begins, the heat loss by exchange with the mold wall leads to partial resolidification and an increase in the apparent viscosity which causes defects in the part. injected, such as folds, shrinkage or non-arrival.
- the range corresponding to the compositions according to the invention comprises not only the band between the straight lines representing the eutectic fractions of 55% and 45%, i.e. the fringe surrounding the straight line representing 50%, but also the area between 45% and 35% which, taking into account the lower limit of Cu to 1 %, practically corresponds to the adjacent triangle.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Conductive Materials (AREA)
- Physical Vapour Deposition (AREA)
- Powder Metallurgy (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
- Ceramic Products (AREA)
- Forging (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
- Chemically Coating (AREA)
- Silicon Compounds (AREA)
- Materials For Medical Uses (AREA)
Description
Ainsi, en se reportant à la figure représentant les teneurs en silicium et cuivre, sur laquelle on a fait figurer les droites d'égale fraction eutectique, on constate que le domaine correspondant aux compositions selon l'invention comprend non seulement la bande comprise entre les droites représentant les fractions eutectiques de 55% et 45%, c'est à dire la frange entourant la droite représentant 50%, mais aussi la zone comprise entre 45% et 35% qui, compte-tenu de la limite inférieure de Cu à 1%, correspond pratiquement au triangle adjacent.
Claims (12)
- Utilisation d'un alliage d'aluminium de composition (en poids):
Si: 5% - 7,2% Cu: 1% - 5% Mg < 1% Zn < 3% Fe < 1,5% ,
éventuellement Sr: 0,005 - 0,05 , Ti: jusqu'à 0,2%, B: jusqu'à 0,1%, autres éléments: < 1% chacun et < 3% au total, reste aluminium, avec la condition: %Si < 7,5 -(%Cu/3),
pour le formage à l'état semi-solide, à un taux de fraction liquide compris entre 35 et 55%, et avec, à cet état, une structure exempte de cristaux polyédriques de silicium non refondus. - Utilisation d'un alliage selon la revendication 1 tel que Si est compris entre 5 et 7% et Cu entre 1% et 1,5%.
- Utilisation d'un alliage selon la revendication 1 tel que Si est compris entre 5 et 6,3% et Cu entre 2,5 et 3,5%.
- Utilisation d'un alliage selon la revendication 1 tel que Si est compris entre 5 et 6% et Cu entre 3,5 et 4,5%.
- Utilisation d'un alliage selon l'une des revendications 1 à 4 contenant entre 0,005 et 0,05% de strontium.
- Utilisation d'un alliage selon l'une des revendications 1 à 5 contenant du titane jusqu'à 0,2% et/ou du bore jusqu'à 0,1%.
- Procédé de fabrication de pièces en alliage d'aluminium par formage à l'état semi-solide,avec un taux de fraction liquide compris entre 35 et 55%, et une structure exempte de cristaux polyédriques de silicium non refondus, d'un alliage de composition (en poids):
Si: 5% - 7,2% Cu: 1% - 5% Mg < 1% Zn < 3% Fe < 1,5% ,
éventuellement Sr: 0,005 - 0,05 , Ti: jusqu'à 0,2%, B: jusqu'à 0,1%, autres éléments: < 1% chacun et < 3% au total, reste aluminium, avec la condition: %Si < 7,5 -(%Cu/3). - Procédé selon la revendication 7 caractérisé en ce que Si est compris entre 5 et 7% et Cu entre 1% et 1,5%.
- Procédé selon la revendication 7 caractérisé en ce que Si est compris entre 5 et 6,3% et Cu entre 2,5 et 3,5%.
- Procédé selon la revendication 7 caractérisé en ce que Si est compris entre 5 et 6% et Cu entre 3,5 et 4,5%.
- Procédé selon l'une des revendications 7 à 10, caractérisé en ce que l'alliage contient entre 0,005 et 0,05% de strontium.
- Procédé selon l'une des revendications 7 à 11, caractérisé en ce que l'alliage contient du titane jusqu'à 0,2% et/ou du bore jusqu'à 0,1%.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9603703 | 1996-03-20 | ||
FR9603703A FR2746414B1 (fr) | 1996-03-20 | 1996-03-20 | Alliage thixotrope aluminium-silicium-cuivre pour mise en forme a l'etat semi-solide |
PCT/FR1997/000439 WO1997035040A1 (fr) | 1996-03-20 | 1997-03-12 | Alliage thixotrope aluminium-silicium-cuivre pour mise en forme a l'etat semi-solide |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0886683A1 EP0886683A1 (fr) | 1998-12-30 |
EP0886683B1 true EP0886683B1 (fr) | 1999-08-18 |
Family
ID=9490523
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97914379A Expired - Lifetime EP0886683B1 (fr) | 1996-03-20 | 1997-03-12 | Alliage thixotrope aluminium-silicium-cuivre pour mise en forme a l'etat semi-solide |
Country Status (16)
Country | Link |
---|---|
US (1) | US5879478A (fr) |
EP (1) | EP0886683B1 (fr) |
JP (1) | JP2000506938A (fr) |
AT (1) | ATE183549T1 (fr) |
AU (1) | AU715447B2 (fr) |
BR (1) | BR9708091A (fr) |
CA (1) | CA2249464C (fr) |
CZ (1) | CZ293598A3 (fr) |
DE (2) | DE886683T1 (fr) |
ES (1) | ES2136468T3 (fr) |
FR (1) | FR2746414B1 (fr) |
HU (1) | HUP9902156A3 (fr) |
NO (1) | NO984366L (fr) |
PL (1) | PL185416B1 (fr) |
SK (1) | SK128098A3 (fr) |
WO (1) | WO1997035040A1 (fr) |
Families Citing this family (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100247143B1 (ko) * | 1998-02-04 | 2000-04-01 | 박호군 | 반응고 성형용 전신재 sic/(2xxx al+si)복합재료 및 그의 제조방법 |
FR2788788B1 (fr) * | 1999-01-21 | 2002-02-15 | Pechiney Aluminium | Produit en alliage aluminium-silicium hypereutectique pour mise en forme a l'etat semi-solide |
US6428636B2 (en) | 1999-07-26 | 2002-08-06 | Alcan International, Ltd. | Semi-solid concentration processing of metallic alloys |
ATE258233T1 (de) * | 1999-07-28 | 2004-02-15 | Ruag Components | Verfahren zur herstellung eines aus einer metall- legierung gebildeten werkstoffes |
US6446325B1 (en) | 1999-12-22 | 2002-09-10 | International Business Machines Corporation | Method of making a swagable metal arm tip for a ceramic actuator arm |
KR20020096279A (ko) * | 2001-06-19 | 2002-12-31 | 현대자동차주식회사 | 알루미늄 합금 |
US6719859B2 (en) | 2002-02-15 | 2004-04-13 | Northwest Aluminum Company | High strength aluminum base alloy |
US6908590B2 (en) * | 2002-03-19 | 2005-06-21 | Spx Corporation | Aluminum alloy |
CN100338248C (zh) * | 2003-11-20 | 2007-09-19 | 北京有色金属研究总院 | 一种Al-Mg-Si系合金半固态坯料的制备方法及其半固态坯料 |
US7165598B2 (en) * | 2004-03-15 | 2007-01-23 | Spx Corporation | Magnesium alloy and methods for making |
JP5069111B2 (ja) * | 2004-07-28 | 2012-11-07 | アルコア インコーポレイテッド | 航空宇宙及び自動車鋳物用Al−Si−Mg−Zn−Cu合金 |
FR2887182B1 (fr) * | 2005-06-15 | 2007-09-21 | Salomon Sa | Rayon pour une roue a rayons en traction et roue a rayons en traction |
GB0514751D0 (en) * | 2005-07-19 | 2005-08-24 | Holset Engineering Co | Method and apparatus for manufacturing turbine or compressor wheels |
US20080299001A1 (en) * | 2007-05-31 | 2008-12-04 | Alcan International Limited | Aluminum alloy formulations for reduced hot tear susceptibility |
CN100464898C (zh) * | 2007-06-18 | 2009-03-04 | 北京科技大学 | 用半固态技术制备SiC颗粒增强复合材料电子封装壳体方法 |
US8047258B1 (en) | 2008-07-18 | 2011-11-01 | Brunswick Corporation | Die casting method for semi-solid billets |
BRPI0918454A2 (pt) * | 2008-09-17 | 2015-11-24 | Cool Polymers Inc | carga de alimentação de liga metálica, e, métodos para moldar por injeção um metal em uma máquina de moldagem por injeção, e para selecionar ligas metálicas para uso em um processo de moldagem por injeção de metal |
CN102319876B (zh) * | 2011-08-31 | 2013-05-01 | 苏州有色金属研究院有限公司 | 汽车用铝合金零部件近终形铸造生产方法 |
US10174409B2 (en) | 2011-10-28 | 2019-01-08 | Alcoa Usa Corp. | High performance AlSiMgCu casting alloy |
EP2895284B1 (fr) * | 2012-09-12 | 2019-01-02 | Aluminio Tecno Industriales Orinoco C.A. | Procédé et installation pour produire des composants constitués par un alliage d'aluminium pour des véhicules et des produits blancs, et composants obtenus par ceux-ci |
WO2015126515A2 (fr) | 2013-12-20 | 2015-08-27 | Alcoa Inc. | Alliage de moulage de alsimgcu à performances élevées |
CN103831417A (zh) * | 2014-03-11 | 2014-06-04 | 扬州宏福铝业有限公司 | 一种高硅铝合金封装外壳半固态的连续成形方法 |
CN110592438A (zh) * | 2019-09-03 | 2019-12-20 | 滨州联信新材料科技有限公司 | 一种高性能a356铝合金的配方以及制备方法 |
CN112646993A (zh) * | 2020-12-15 | 2021-04-13 | 有研工程技术研究院有限公司 | 一种适用于高固相半固态流变压铸的铝合金材料 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1924725A (en) * | 1932-09-21 | 1933-08-29 | Aluminum Co Of America | Aluminum alloys |
GB555425A (en) * | 1942-02-18 | 1943-08-23 | Magnal Products Ltd | Improvements in and relating to aluminium alloys |
LU69788A1 (fr) * | 1974-04-04 | 1976-03-17 | Pechiney Aluminium | |
SU523953A1 (ru) * | 1975-01-13 | 1976-08-05 | Ярославское Объединение "Автодизель" | Литейный сплав на основе аллюмини |
US4457355A (en) * | 1979-02-26 | 1984-07-03 | International Telephone And Telegraph Corporation | Apparatus and a method for making thixotropic metal slurries |
CA1235048A (fr) * | 1983-05-23 | 1988-04-12 | Yoji Awano | Methode de production de pieces moulees en alliage d'aluminium et produit connexe |
FR2557144A1 (fr) * | 1983-12-22 | 1985-06-28 | Fonderie Alcoa Mg Sa | Alliage d'aluminium a proprietes ameliorees |
US4865808A (en) * | 1987-03-30 | 1989-09-12 | Agency Of Industrial Science And Technology | Method for making hypereutetic Al-Si alloy composite materials |
FR2634677B1 (fr) * | 1988-07-07 | 1990-09-21 | Pechiney Aluminium | Procede de fabrication par coulee continue de produits metalliques thixotropes |
FR2656552B1 (fr) * | 1990-01-04 | 1995-01-13 | Pechiney Aluminium | Procede de fabrication de produits metalliques thixotropes par coulee continue avec brassage electromagnetique en courant polyphase. |
GB2243620B (en) * | 1990-03-27 | 1994-06-29 | Atsugi Unisia Corp | Improvements in and relating to forming aluminium-silicon alloy |
JP2901218B2 (ja) * | 1992-07-16 | 1999-06-07 | 大同メタル工業 株式会社 | アルミニウム合金軸受 |
-
1996
- 1996-03-20 FR FR9603703A patent/FR2746414B1/fr not_active Expired - Fee Related
-
1997
- 1997-02-26 US US08/806,399 patent/US5879478A/en not_active Expired - Fee Related
- 1997-03-12 CZ CZ982935A patent/CZ293598A3/cs unknown
- 1997-03-12 BR BR9708091A patent/BR9708091A/pt not_active Application Discontinuation
- 1997-03-12 SK SK1280-98A patent/SK128098A3/sk unknown
- 1997-03-12 DE DE0886683T patent/DE886683T1/de active Pending
- 1997-03-12 AU AU21645/97A patent/AU715447B2/en not_active Ceased
- 1997-03-12 DE DE69700436T patent/DE69700436T2/de not_active Expired - Fee Related
- 1997-03-12 EP EP97914379A patent/EP0886683B1/fr not_active Expired - Lifetime
- 1997-03-12 WO PCT/FR1997/000439 patent/WO1997035040A1/fr not_active Application Discontinuation
- 1997-03-12 PL PL97329008A patent/PL185416B1/pl not_active IP Right Cessation
- 1997-03-12 AT AT97914379T patent/ATE183549T1/de not_active IP Right Cessation
- 1997-03-12 JP JP9533188A patent/JP2000506938A/ja active Pending
- 1997-03-12 HU HU9902156A patent/HUP9902156A3/hu unknown
- 1997-03-12 ES ES97914379T patent/ES2136468T3/es not_active Expired - Lifetime
- 1997-03-12 CA CA002249464A patent/CA2249464C/fr not_active Expired - Fee Related
-
1998
- 1998-09-18 NO NO984366A patent/NO984366L/no not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
NO984366L (no) | 1998-11-18 |
CA2249464C (fr) | 2004-12-14 |
DE69700436D1 (de) | 1999-09-23 |
ATE183549T1 (de) | 1999-09-15 |
DE69700436T2 (de) | 2000-02-03 |
FR2746414B1 (fr) | 1998-04-30 |
BR9708091A (pt) | 1999-07-27 |
HUP9902156A2 (hu) | 1999-11-29 |
HUP9902156A3 (en) | 2001-11-28 |
ES2136468T3 (es) | 1999-11-16 |
EP0886683A1 (fr) | 1998-12-30 |
WO1997035040A1 (fr) | 1997-09-25 |
PL329008A1 (en) | 1999-03-01 |
CZ293598A3 (cs) | 1999-10-13 |
CA2249464A1 (fr) | 1997-09-25 |
NO984366D0 (no) | 1998-09-18 |
FR2746414A1 (fr) | 1997-09-26 |
AU715447B2 (en) | 2000-02-03 |
PL185416B1 (pl) | 2003-05-30 |
US5879478A (en) | 1999-03-09 |
AU2164597A (en) | 1997-10-10 |
SK128098A3 (en) | 1999-05-07 |
DE886683T1 (de) | 1999-05-06 |
JP2000506938A (ja) | 2000-06-06 |
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