EP0478479A1 - Process for the improvement of microshrinkage behaviour of magnesium alloys - Google Patents
Process for the improvement of microshrinkage behaviour of magnesium alloys Download PDFInfo
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- EP0478479A1 EP0478479A1 EP91420340A EP91420340A EP0478479A1 EP 0478479 A1 EP0478479 A1 EP 0478479A1 EP 91420340 A EP91420340 A EP 91420340A EP 91420340 A EP91420340 A EP 91420340A EP 0478479 A1 EP0478479 A1 EP 0478479A1
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- Prior art keywords
- strontium
- manganese
- zinc
- magnesium alloys
- alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C23/00—Alloys based on magnesium
- C22C23/02—Alloys based on magnesium with aluminium as the next major constituent
Definitions
- the present invention relates to a method making it possible to improve the microretassuring behavior of magnesium alloys.
- Said alloys have good mechanical characteristics and excellent resistance to corrosion.
- they when they are shaped from liquid metal by gravity molding, either in a sand mold or in waterproof mold or by pressure molding, they generally have micro-shrinkage in their mass. These shrinkages are due to the fact that during solidification, a contraction of the metal occurs which can reach several% by volume; if no supply of liquid metal is made in the contraction zone, then a vacuum is produced which results in the formation of a cavity or shrinkage.
- the solidification interval of the metal is very large, as in the case of the alloys mentioned above, a relatively large pasty zone is formed in the molded part in which the contraction occurs gradually. The liquid metal is thus caused to travel between the solid dendrites over a long distance and cannot fill the voids: this results in the formation of microcavities distributed between the grains throughout the pasty zone; this is called micro-backwashing.
- microbreaks tend to degrade the mechanical characteristics of the parts which contain them.
- they form open porosities which make them unusable in applications where they are subjected to pressure.
- the invention consists in adding to the magnesium alloy an element from the family of alkaline earths: strontium.
- the amount of strontium added is between 0.01 and 2% by weight of the alloy because below 0.01%, the effect is negligible and above 2%, the addition turns out to be harmful because there is formation of a large quantity of intermetallic compounds which weaken the metal.
- the purpose of this example is to show the influence of strontium on the mechanical characteristics of the AZ91 alloy. Test pieces without micro-backwashes, in the T4 and T6 state and containing 0 and 0.3% of strontium were subjected to tensile tests at room temperature and the values of the elastic limit R0.2, of the resistance were measured. at rupture Rm and elongation A. The results are shown in the following table.
- T4 and T6 correspond to heat treatments for dissolving followed in the first case of a natural aging treatment and in the second of an artificial aging treatment.
- strontium does not alter the mechanical tensile properties and even improves the plastic limit of the alloy in the T4 state.
- the presence of strontium guaranteeing the absence of microretassures it is certain that the values obtained are representative of the properties of the whole part, which is more difficult to obtain in the absence of strontium.
- the purpose of this example is to show the influence of strontium on corrosion resistance.
- This invention finds its application, in particular in the manufacture of gearbox casings and structural elements of portable computers.
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- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Prevention Of Electric Corrosion (AREA)
- Manufacture And Refinement Of Metals (AREA)
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Abstract
Description
La présente invention est relative à un procédé permettant d'améliorer le comportement à la microretassure des alliages de magnésium.The present invention relates to a method making it possible to improve the microretassuring behavior of magnesium alloys.
On entend ici par alliages de magnésium, tous ceux qui contiennent entre 4 et 10 % en poids d'aluminium et,
- soit jusqu'à 3 % de zinc et/ou jusqu'à 1 % de manganèse,
- soit jusqu'à 1% de silicium et/ou jusqu'à 1 % de manganèse, solde magnésium.
- either up to 3% zinc and / or up to 1% manganese,
- either up to 1% silicon and / or up to 1% manganese, magnesium balance.
Plus particulièrement, on peut citer les alliages qui selon les normes de l'ASTM répondent aux désignations suivantes:
- AZ63 ( alliage contenant en poids 6,0 % d'aluminium, 3,0 % de zinc, au moins 0,15 % de manganèse )
- AZ80 ( alliage contenant en poids 8,5 % d'aluminium, 0,5 % de zinc, au moins 0,12% de manganèse )
- AZ91 ( alliage contenant en poids 8,7 % d'aluminium, 0,7 % de zinc, au moins 0,13 % de manganèse )
- AZ92 ( alliage contenant en poids 9,0 % d'aluminium, 2,0 % de zinc, au moins 0,1 % de manganèse )
- AM60 ( alliage contenant en poids 6,0 % d'aluminium, 0,13 % de manganèse )
- AM100 ( alliage contenant en poids 10,0 % d'aluminium, 0,1 % de manganèse )
- AS41 ( alliage contenant en poids 4,2 % d'aluminium, 0,35 % de manganèse )
- AZ63 (alloy containing by weight 6.0% aluminum, 3.0% zinc, at least 0.15% manganese)
- AZ80 (alloy containing by weight 8.5% aluminum, 0.5% zinc, at least 0.12% manganese)
- AZ91 (alloy containing by weight 8.7% aluminum, 0.7% zinc, at least 0.13% manganese)
- AZ92 (alloy containing by weight 9.0% aluminum, 2.0% zinc, at least 0.1% manganese)
- AM60 (alloy containing by weight 6.0% aluminum, 0.13% manganese)
- AM100 (alloy containing by weight 10.0% aluminum, 0.1% manganese)
- AS41 (alloy containing by weight 4.2% aluminum, 0.35% manganese)
Les dits alliages présentent de bonnes caractéristiques mécaniques et une excellente résistance à la corrosion. Cependant, quand ils sont mis en forme à partir de métal liquide par moulage par gravité, soit en moule sable soit en moule étanche ou par moulage sous pression, ils présentent généralement dans leur masse des microretassures. Ces retassures sont dues au fait que pendant la solidification, il se produit une contraction du métal qui peut atteindre plusieurs % en volume ; si aucun apport de métal liquide n'est réalisé dans la zone de contraction, il se produit alors un vide qui se traduit par la formation d'une cavité ou retassure.
Lorsque l'intervalle de solidification du métal est très grand, comme c'est le cas des alliages mentionnés ci-dessus, il se forme dans la pièce moulée une zone pâteuse relativement étendue dans laquelle la contraction se produit progressivement. Le métal liquide est ainsi amené à cheminer entre les dendrites solides sur une grande distance et ne peut combler les vides : il en résulte la formation de microcavités réparties entre les grains dans toute la zone pâteuse ; c'est ce qu'on appelle des microretassures.Said alloys have good mechanical characteristics and excellent resistance to corrosion. However, when they are shaped from liquid metal by gravity molding, either in a sand mold or in waterproof mold or by pressure molding, they generally have micro-shrinkage in their mass. These shrinkages are due to the fact that during solidification, a contraction of the metal occurs which can reach several% by volume; if no supply of liquid metal is made in the contraction zone, then a vacuum is produced which results in the formation of a cavity or shrinkage.
When the solidification interval of the metal is very large, as in the case of the alloys mentioned above, a relatively large pasty zone is formed in the molded part in which the contraction occurs gradually. The liquid metal is thus caused to travel between the solid dendrites over a long distance and cannot fill the voids: this results in the formation of microcavities distributed between the grains throughout the pasty zone; this is called micro-backwashing.
Or, les microretassures tendent à dégrader les caractéristiques mécaniques des pièces qui en contiennent. De plus, dans le cas de pièces à parois minces, elles forment des porosités ouvertes qui les rendent inutilisables dans les applications où elles sont soumises à une pression.However, microbreaks tend to degrade the mechanical characteristics of the parts which contain them. In addition, in the case of thin-walled parts, they form open porosities which make them unusable in applications where they are subjected to pressure.
Le problème se pose donc, lorsqu'on veut obtenir à partir de ces alliages des pièces moulées ayant de bonnes caractéristiques mécaniques ou tout au moins étanches, d'empêcher la formation de ces microretassures sans pour autant nuire à d'autres propriétés telles que la résistance à la corrosion, par exemple.The problem therefore arises, when it is desired to obtain from these alloys molded parts having good mechanical characteristics or at least leaktightness, to prevent the formation of these micro-shrinkages without harming other properties such as the corrosion resistance, for example.
Certes, ce problème n'est pas nouveau et l'homme de l'art de la fonderie des alliages de magnésium a été amené à rechercher des solutions visant à le résoudre.Admittedly, this problem is not new and those skilled in the art of founding magnesium alloys have been led to seek solutions aimed at solving it.
C'est ainsi, par exemple, qu'il a trouvé que l'ajout de calcium permettait de réduire la présence de microporosités dans les alliages de magnésium énumérés plus haut. On peut citer, dans ce domaine, le brevet britannique N° 847.992 dans lequel il est dit page 2, lignes 95-99 que les alliages de magnésium ayant une forte teneur en aluminium et en zinc ont une tendance à former des microretassures et que la présence de calcium diminue fortement cette tendance. Toutefois, on peut noter que les quantités mises en oeuvre sont, suivant la revendication 1, comprises entre 0,5 % et 3 %, ce qui est relativement élevé et conduit à certaines difficultés de fabrication telles que, en particulier le collage du métal et/ou des pièces à l'outillage.Thus, for example, he found that adding calcium reduced the presence of microporosities in the magnesium alloys listed above. Mention may be made, in this field, of British Patent No. 847,992 in which it is said on page 2, lines 95-99 that magnesium alloys having a high aluminum and zinc content have a tendency to form microretasures and that the presence of calcium strongly decreases this tendency. However, it can be noted that the quantities used are, according to
C'est pourquoi la demanderesse a cherché à trouver une autre solution présentant moins d'inconvénients. Cela l'a amenée à mettre au point un procédé permettant d'améliorer le comportement à la microretassure lors de leur mise en forme par moulage des alliages de magnésium contenant comme éléments principaux d'addition 4 à 10 % en poids d' aluminium et soit jusqu'à 3 % de zinc et/ou jusqu'à 1 % de manganèse, soit jusqu'à 1 % de silicium et/ou jusqu'à 1 % de manganèse caractérisé en ce que l'on ajoute du strontium aux dits alliages avant moulage.This is why the applicant has sought to find another solution having fewer drawbacks. This led it to develop a process making it possible to improve the behavior of microbracking during their shaping by molding of magnesium alloys containing as main elements of addition 4 to 10% by weight of aluminum and either up to 3% zinc and / or up to 1% manganese, or up to 1% silicon and / or up to 1% manganese, characterized in that strontium is added to said alloys before molding.
Ainsi, l'invention consiste à ajouter à l'alliage de magnésium un élément de la famille des alcalino-terreux : le strontium.Thus, the invention consists in adding to the magnesium alloy an element from the family of alkaline earths: strontium.
Certes, la présence de strontium dans les alliages de magnésium a déjà été signalée par ailleurs ; on peut citer, à ce sujet, les brevets britaniques 687.934, 687.935 et 1.354.363. Mais, ces documents concernent des alliages contenant du lithium et du zirconium et/ ou du cadmium et de l'argent. Quant au strontium , il figure parmi d'autres éléments d'alliage tels que le zinc, le cadmium, le thorium, le mercure, l'argent, le baryum, le calcium, le plomb et aucune fonction particulière ne lui est attribuée. En fait, la demanderesse a constaté que l'ajout de strontium dans les alliages de magnésium mentionnés plus haut avait pour effet :
- de concentrer la microretassure dans une zone relativement restreinte de la pièce et en tout cas proche de l' attaque du moule c'est à dire de la partie située au voisinage de l'alimentation, ce qui permet en masselottant cette zone d'obtenir une pièce saine;
- de réduire de manière très sensible l'écart entre la densité minimale et la densité de l'alliage aux plus fortes teneurs en strontium;
- d'améliorer ainsi les caractéristiques mécaniques des pièces obtenues sans nuire à leur tenue à la corrosion.
- to concentrate the micro-shrinkage in a relatively restricted zone of the part and in any case close to the attack of the mold, that is to say of the part situated in the vicinity of the supply, which allows by massing this zone to obtain a healthy room;
- very significantly reduce the difference between the minimum density and the density of the alloy with the highest strontium contents;
- thus improving the mechanical characteristics of the parts obtained without harming their resistance to corrosion.
De préférence, la quantité de strontium ajoutée est comprise entre 0,01 et 2% en poids de l'alliage car en dessous de 0.01%, l'effet est négligeable et au dessus de 2%, l'ajout s'avère nocif car il y a formation d'une grande quantité de composés intermétalliques qui fragilisent le métal.Preferably, the amount of strontium added is between 0.01 and 2% by weight of the alloy because below 0.01%, the effect is negligible and above 2%, the addition turns out to be harmful because there is formation of a large quantity of intermetallic compounds which weaken the metal.
Cet ajout est fait, de préférence, sous forme élémentaire suivant les techniques connues de l'homme de l'art.This addition is preferably made in elementary form according to techniques known to those skilled in the art.
Les exemples suivants permettront de mieux comprendre l'invention.The following examples will better understand the invention.
Il a pour but de montrer l'influence respective des ajouts de strontium et de calcium sur la densité des pièces. Des éprouvettes parallélipipédiques (15x30x250 mm³) sont coulées dans des conditions voisines dans des moules en sable à la température de 700°C.
Après démoulage, les éprouvettes sont radiographiées, la densité est mesurée et on étudie l'évolution de la densité de l'alliage en fonction de la distance par rapport à l'attaque de coulée.
Des alliages AZ 91 contenant 0; 0,018; 1 et 2% de strontium d'une part et 0,018; 1 et 2 % de calcium d'autre part ont été soumis à cette méthode.
Les résultats figurent sur les schémas 1, 2 et 3 qui permettent de comparer pour chacune des teneurs l'influence à la fois du calcium et du strontium.
On constate que sur les éprouvettes contenant du strontium:
- la densité à une distance de 150 mm de l'attaque est pratiquement égale à la densité théorique de l'alliage;
- le nombre de microporosités est d'autant plus réduit que la teneur en strontium est élevée;
- les défauts sont concentrés dans une zone peu étendue alors que le reste de l'échantillon est plus sain que l'AZ91. Dans le cas d'une installation industrielle, on alimentera la zone de défauts avec une masselotte.
After demolding, the test pieces are X-rayed, the density is measured and the evolution of the density of the alloy is studied as a function of the distance from the casting attack.
AZ 91 alloys containing 0; 0.018; 1 and 2% strontium on the one hand and 0.018; 1 and 2% calcium on the other hand were subjected to this method.
The results are shown in diagrams 1, 2 and 3 which make it possible to compare for each of the contents the influence of both calcium and strontium.
It is found that on test tubes containing strontium:
- the density at a distance of 150 mm from the attack is practically equal to the theoretical density of the alloy;
- the higher the number of microporosities, the higher the strontium content;
- the defects are concentrated in a small area while the rest of the sample is healthier than the AZ91. In the case of an industrial installation, the fault zone will be supplied with a counterweight.
En ce qui concerne le calcium, il exerce également un effet mais avec une ampleur nettement moins grande que le strontium.As for calcium, it also has an effect, but with a much smaller magnitude than strontium.
Cet exemple a pour but de montrer l'influence du strontium sur les caractéristiques mécaniques de l'alliage AZ91. Des éprouvettes sans microretassures, à l'état T4 et T6 et contenant 0 et 0,3% de strontium ont été soumises à des essais de traction à température ambiante et on a mesuré les valeurs de la limite élastique R0,2, de la résistance à la rupture Rm et de l'allongement A. Les résultats figurent dans le tableau suivant.The purpose of this example is to show the influence of strontium on the mechanical characteristics of the AZ91 alloy. Test pieces without micro-backwashes, in the T4 and T6 state and containing 0 and 0.3% of strontium were subjected to tensile tests at room temperature and the values of the elastic limit R0.2, of the resistance were measured. at rupture Rm and elongation A. The results are shown in the following table.
Rappelons que les états T4 et T6 correspondent à des traitements thermiques de mise en solution suivis dans le premier cas d'un traitement de vieillissement naturel et dans le deuxième d'un traitement de vieillissement artificiel.
On constate que l'ajout de strontium n'altère pas les propriétés mécaniques de traction et même améliore la limite plastique de l'alliage à l'état T4.
De plus, la présence de strontium garantissant l'absence de microretassures, on est certain que les valeurs obtenues sont représentatives des propriétés de toute la pièce, ce qui est plus difficile à obtenir en l'absence de strontium.It is noted that the addition of strontium does not alter the mechanical tensile properties and even improves the plastic limit of the alloy in the T4 state.
In addition, the presence of strontium guaranteeing the absence of microretassures, it is certain that the values obtained are representative of the properties of the whole part, which is more difficult to obtain in the absence of strontium.
Cet exemple a pour but de montrer l'influence du strontium sur la résistance à la corrosion.The purpose of this example is to show the influence of strontium on corrosion resistance.
Pour celà, on a soumis des échantillons d'AZ91 contenant 0, 0,018 et 0,3% de strontium prélevés au centre des éprouvettes moulées et traités T4 ou T6 à l'action d'une solution aqueuse contenant 56 en poids de chlorure de sodium pendant 3jours puis, on a mesuré la perte de masse du dit échantillon.
Les résultats figurent dans le tableau suivant:
The results are shown in the following table:
Ces résultats montrent que l'ajout de strontium conduit à une réduction importante de la perte de masse de l'échantillon, notamment pour des teneurs de 0,3%.These results show that the addition of strontium leads to a significant reduction in the loss of mass of the sample, in particular for contents of 0.3%.
Ainsi, l'absence de microretassures diminue de façon sensible la surface spécifique des échantillons et, par conséquent, améliore la résistance à la corrosion.Thus, the absence of micro-shrinkage significantly decreases the specific surface area of the samples and, consequently, improves the resistance to corrosion.
Cette invention trouve son application, notamment dans la fabrication de carters de boîtes de vitesse et d'éléments de structure d'ordinateurs portables.This invention finds its application, in particular in the manufacture of gearbox casings and structural elements of portable computers.
Claims (3)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9012455A FR2667328B1 (en) | 1990-09-28 | 1990-09-28 | PROCESS FOR IMPROVING MICRORETASSURE BEHAVIOR OF MAGNESIUM ALLOYS. |
| FR9012455 | 1990-09-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0478479A1 true EP0478479A1 (en) | 1992-04-01 |
| EP0478479B1 EP0478479B1 (en) | 1995-05-17 |
Family
ID=9401070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP91420340A Expired - Lifetime EP0478479B1 (en) | 1990-09-28 | 1991-09-26 | Process for the improvement of microshrinkage behaviour of magnesium alloys |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US5223215A (en) |
| EP (1) | EP0478479B1 (en) |
| JP (1) | JP2559306B2 (en) |
| KR (1) | KR100225180B1 (en) |
| CA (1) | CA2052372C (en) |
| DE (1) | DE69109788T2 (en) |
| ES (1) | ES2071961T3 (en) |
| FR (1) | FR2667328B1 (en) |
| NO (1) | NO179290C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0665299A1 (en) * | 1993-12-17 | 1995-08-02 | Mazda Motor Corporation | Magnesium alloy cast material for plastic processing, magnesium alloy member using the same, and manufacturing method thereof |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5613999A (en) * | 1992-09-11 | 1997-03-25 | Nippon Kinzoku Co., Ltd. | Method for producing magnesium |
| US5693158A (en) * | 1993-02-12 | 1997-12-02 | Mazda Motor Corporation | Magnesium light alloy product and method of producing the same |
| IL125681A (en) * | 1998-08-06 | 2001-06-14 | Dead Sea Magnesium Ltd | Magnesium alloy for high temperature applications |
| US6322644B1 (en) * | 1999-12-15 | 2001-11-27 | Norands, Inc. | Magnesium-based casting alloys having improved elevated temperature performance |
| US6808679B2 (en) * | 1999-12-15 | 2004-10-26 | Noranda, Inc. | Magnesium-based casting alloys having improved elevated temperature performance, oxidation-resistant magnesium alloy melts, magnesium-based alloy castings prepared therefrom and methods for preparing same |
| CA2337630C (en) | 2000-02-24 | 2005-02-01 | Mitsubishi Aluminum Co., Ltd. | Die casting magnesium alloy |
| US6342180B1 (en) | 2000-06-05 | 2002-01-29 | Noranda, Inc. | Magnesium-based casting alloys having improved elevated temperature properties |
| JP3592659B2 (en) * | 2001-08-23 | 2004-11-24 | 株式会社日本製鋼所 | Magnesium alloys and magnesium alloy members with excellent corrosion resistance |
| DE10251663A1 (en) * | 2002-11-06 | 2004-05-19 | Bayerische Motoren Werke Ag | magnesium alloy |
| CA2419010A1 (en) * | 2003-02-17 | 2004-08-17 | Noranda Inc. | Strontium for melt oxidation reduction of magnesium and a method for adding strontium to magnesium |
| JP5249367B2 (en) * | 2003-06-19 | 2013-07-31 | 住友電気工業株式会社 | Magnesium-based alloy screw |
| CN1306052C (en) * | 2004-09-17 | 2007-03-21 | 中国科学院上海微***与信息技术研究所 | High corrosion resisting as cast magnalium and preparation method |
| DE102007061561A1 (en) | 2007-12-18 | 2009-06-25 | Magontec Gmbh | Galvanic sacrificial anode useful in a storage device for aqueous media such as drinking water, comprises a magnesium based alloy consisting of aluminum, zinc, manganese, strontium and other impurities |
| CN104745905A (en) * | 2013-12-30 | 2015-07-01 | 苏州昊卓新材料有限公司 | High-strength high-toughness die-cast magnesium alloy and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2221254A (en) * | 1939-11-13 | 1940-11-12 | Dow Chemical Co | Magnesium base alloy |
| US2464918A (en) * | 1945-03-22 | 1949-03-22 | Magnesium Elektron Ltd | Magnesium base alloys |
| FR1214787A (en) * | 1958-02-11 | 1960-04-12 | Fuchs Otto | Magnesium alloys with high creep resistance against permanent set at elevated temperatures |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1979452A (en) * | 1933-03-25 | 1934-11-06 | Kemet Lab Co Inc | Magnesium alloy |
| US3119684A (en) * | 1961-11-27 | 1964-01-28 | Dow Chemical Co | Article of magnesium-base alloy and method of making |
| US5041294A (en) * | 1990-04-24 | 1991-08-20 | Wm. Wrigley Jr. Company | Sorbitol-modified flavor |
| US5143564A (en) * | 1991-03-28 | 1992-09-01 | Mcgill University | Low porosity, fine grain sized strontium-treated magnesium alloy castings |
-
1990
- 1990-09-28 FR FR9012455A patent/FR2667328B1/en not_active Expired - Fee Related
-
1991
- 1991-09-16 US US07/760,474 patent/US5223215A/en not_active Expired - Lifetime
- 1991-09-19 NO NO913693A patent/NO179290C/en unknown
- 1991-09-26 EP EP91420340A patent/EP0478479B1/en not_active Expired - Lifetime
- 1991-09-26 ES ES91420340T patent/ES2071961T3/en not_active Expired - Lifetime
- 1991-09-26 DE DE69109788T patent/DE69109788T2/en not_active Expired - Fee Related
- 1991-09-27 CA CA002052372A patent/CA2052372C/en not_active Expired - Fee Related
- 1991-09-27 JP JP3249627A patent/JP2559306B2/en not_active Expired - Fee Related
- 1991-09-27 KR KR1019910017162A patent/KR100225180B1/en not_active IP Right Cessation
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2221254A (en) * | 1939-11-13 | 1940-11-12 | Dow Chemical Co | Magnesium base alloy |
| US2464918A (en) * | 1945-03-22 | 1949-03-22 | Magnesium Elektron Ltd | Magnesium base alloys |
| FR1214787A (en) * | 1958-02-11 | 1960-04-12 | Fuchs Otto | Magnesium alloys with high creep resistance against permanent set at elevated temperatures |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0665299A1 (en) * | 1993-12-17 | 1995-08-02 | Mazda Motor Corporation | Magnesium alloy cast material for plastic processing, magnesium alloy member using the same, and manufacturing method thereof |
| US6143097A (en) * | 1993-12-17 | 2000-11-07 | Mazda Motor Corporation | Magnesium alloy cast material for plastic processing, magnesium alloy member using the same, and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2052372A1 (en) | 1992-03-29 |
| NO913693D0 (en) | 1991-09-19 |
| FR2667328B1 (en) | 1992-11-06 |
| JP2559306B2 (en) | 1996-12-04 |
| US5223215A (en) | 1993-06-29 |
| DE69109788D1 (en) | 1995-06-22 |
| DE69109788T2 (en) | 1995-09-21 |
| ES2071961T3 (en) | 1995-07-01 |
| NO179290C (en) | 1996-09-11 |
| NO179290B (en) | 1996-06-03 |
| EP0478479B1 (en) | 1995-05-17 |
| JPH0867928A (en) | 1996-03-12 |
| KR920006526A (en) | 1992-04-27 |
| CA2052372C (en) | 1997-03-18 |
| FR2667328A1 (en) | 1992-04-03 |
| NO913693L (en) | 1992-03-30 |
| KR100225180B1 (en) | 1999-10-15 |
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