EP0419375B1 - Hochfeste Magnesiumlegierungen und Verfahren zu ihrer Herstellung durch rasche Erstarrung - Google Patents
Hochfeste Magnesiumlegierungen und Verfahren zu ihrer Herstellung durch rasche Erstarrung Download PDFInfo
- Publication number
- EP0419375B1 EP0419375B1 EP90420383A EP90420383A EP0419375B1 EP 0419375 B1 EP0419375 B1 EP 0419375B1 EP 90420383 A EP90420383 A EP 90420383A EP 90420383 A EP90420383 A EP 90420383A EP 0419375 B1 EP0419375 B1 EP 0419375B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- alloy
- process according
- magnesium
- rapidly
- temperature
- 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
Links
- 238000000034 method Methods 0.000 title claims description 15
- 238000004519 manufacturing process Methods 0.000 title claims description 3
- 238000007712 rapid solidification Methods 0.000 title description 6
- 229910000861 Mg alloy Inorganic materials 0.000 title description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 36
- 239000000956 alloy Substances 0.000 claims description 36
- 239000011575 calcium Substances 0.000 claims description 12
- 239000011701 zinc Substances 0.000 claims description 10
- 238000007596 consolidation process Methods 0.000 claims description 9
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 8
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 8
- 239000011777 magnesium Substances 0.000 claims description 8
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 7
- 229910052782 aluminium Inorganic materials 0.000 claims description 7
- 229910052791 calcium Inorganic materials 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 7
- 229910052749 magnesium Inorganic materials 0.000 claims description 7
- 239000011572 manganese Substances 0.000 claims description 7
- 229910052725 zinc Inorganic materials 0.000 claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 4
- 239000004411 aluminium Substances 0.000 claims description 4
- 238000005266 casting Methods 0.000 claims description 4
- 229910000765 intermetallic Inorganic materials 0.000 claims description 4
- 229910052748 manganese Inorganic materials 0.000 claims description 4
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- 229910021323 Mg17Al12 Inorganic materials 0.000 claims description 3
- 229910001122 Mischmetal Inorganic materials 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 3
- 150000002910 rare earth metals Chemical class 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 229910052684 Cerium Inorganic materials 0.000 claims description 2
- 229910052779 Neodymium Inorganic materials 0.000 claims description 2
- 229910052777 Praseodymium Inorganic materials 0.000 claims description 2
- 238000005242 forging Methods 0.000 claims description 2
- 230000002706 hydrostatic effect Effects 0.000 claims description 2
- 239000011261 inert gas Substances 0.000 claims description 2
- 229910052746 lanthanum Inorganic materials 0.000 claims description 2
- 239000011159 matrix material Substances 0.000 claims description 2
- 238000005096 rolling process Methods 0.000 claims description 2
- 150000002739 metals Chemical class 0.000 claims 1
- 238000005507 spraying Methods 0.000 claims 1
- 229910052727 yttrium Inorganic materials 0.000 claims 1
- 230000007797 corrosion Effects 0.000 description 15
- 238000005260 corrosion Methods 0.000 description 15
- 238000009987 spinning Methods 0.000 description 14
- 238000012360 testing method Methods 0.000 description 8
- 239000000047 product Substances 0.000 description 6
- 230000004580 weight loss Effects 0.000 description 5
- 208000016261 weight loss Diseases 0.000 description 4
- -1 Mg32(Al Substances 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 238000007792 addition Methods 0.000 description 2
- 238000000889 atomisation Methods 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 229910001338 liquidmetal Inorganic materials 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 229910001203 Alloy 20 Inorganic materials 0.000 description 1
- 241001417494 Sciaenidae Species 0.000 description 1
- 229910001297 Zn alloy Inorganic materials 0.000 description 1
- YFXPPSKYMBTNAV-UHFFFAOYSA-N bensultap Chemical compound C=1C=CC=CC=1S(=O)(=O)SCC(N(C)C)CSS(=O)(=O)C1=CC=CC=C1 YFXPPSKYMBTNAV-UHFFFAOYSA-N 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 208000020442 loss of weight Diseases 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000012265 solid product Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- 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 magnesium alloys with high mechanical strength and their manufacturing process and constitutes a development of the invention described in French application 88-02885 (FR-A-2627 780).
- Such alloys also have improved corrosion resistance; in fact, unlike the alloys described in French applications 88-02885 and 89-01913 (FR-A-2642 439), which exhibit localized corrosions (for example pitting, corrosion according to the machining streaks, etc.) which can cause along the weak zones, they exhibit corrosion that is at least as weak but also more homogeneous.
- the alloys according to the invention therefore contain, in the required proportions, both calcium and rare earths, in particular Y (understood here as a TR), Nd, Ce, La, Pr or misch metal (MM).
- the calcium may be in the form of Al2Ca dispersoids precipitated at the grain boundaries and / or in solid solution.
- the particles of the intermetallic compound Al2Ca appear when the Ca concentration is sufficient; they are less than 1 ⁇ m in size and preferably less than 0.5 ⁇ m in size.
- the TRs the dispersoids appearing from certain concentrations specific to each of the TRs. The presence of Mn is not necessary.
- intermetallic particles for example based on Al and Mn, of very small size (of the order of 40 to 50 nanometers) can also be dispersed in the magnesium grains.
- the alloys are obtained by the casting, rapid cooling and consolidation processes and their various modes of implementation described in the French application 88-02885 already cited which form an integral part of the description.
- the alloy in the liquid state is subjected to rapid solidification, at a speed at least equal to 104K sec ⁇ 1, generally less than 106K sec ⁇ 1, so as to obtain a solidified product, of which at least one of the dimensions is less than 150 ⁇ m, said product then being consolidated directly by precompaction and compacting or by direct compacting, the compacting taking place at a temperature between 200 and 350 ° C.
- the solidified product does not undergo any other conditioning operation such as grinding before being consolidated by precompaction and / or compacting, this operation possibly being of a nature to alter the mechanical characteristics of the consolidated alloy obtained.
- the first two modes of application make it possible to obtain a solid in the form of ribbons, scales or platelets, while the latter gives powder. These methods are described in detail in French application 88-02885 and do not form part of the invention as such.
- the rapidly solidified product can be degassed under vacuum at a temperature less than or equal to 350 ° C. before consolidation.
- Consolidation also described in French application 88-02885, is carried out, according to the invention, directly on the solidified products, in particular directly on the scales or plates.
- Consolidation is essential to avoid long exposures to high temperatures. We chose to operate a warm spinning which minimizes the duration of passage at high temperature.
- the spinning temperature is between 200 and 350 ° C; the spinning ratio is generally between 10 and 40, preferably between 10 and 20, and simultaneously the speed of advance of the pestle is preferably between 0.5 and 3 mm / sec, but it can be higher.
- the solid product before consolidation can be introduced directly into the press container, or after precompaction at a temperature of at most 350 ° C with introduction into a sheath of Mg or its alloys, or Al or its alloys, itself introduced into said container.
- the process according to the invention makes it possible to unexpectedly obtain a consolidated magnesium alloy which has, as already described, a fine structure (grains less than 3 ⁇ m) reinforced by intermetallic compounds, and high mechanical characteristics remaining unchanged, as well as the structure of said alloy, after prolonged maintenance at a temperature reaching, or even exceeding, 350 ° C.
- Corrosion resistance is also improved in uniformity and in weight loss (which is reduced).
- Hv Vickers hardness expressed in kg / mm2
- TYS elastic limit measured at 0.2% elongation, expressed in MPa
- tests 20-21-22 which illustrate the present invention, while tests 4-23-7-9-11-12 illustrate the prior art and are drawn in part from application FR 89-01913, already cited.
- Tests 4 and 23 relate to alloys treated by rapid solidification and consolidation of composition identical to that of AZ91; tests 7-9-11-12 relate to alloys containing Ca also obtained by rapid solidification and consolidation. It is noted that all of these alloys exhibit corrosion results and / or mechanical characteristics that are lower than those of the alloys according to the invention. Samples 23, 4 and 7 undergo heterogeneous corrosion with relatively high weight losses; samples 4 and 7 also have mechanical characteristics much lower than those of the alloys according to the invention. Sample 11 exhibits uniform corrosion but a high loss of weight, comparable to that of alloy 20, and of mechanical properties much lower than those of the latter and also those of alloys 21 or 22. Finally, the sample 12 has excellent resistance to corrosion, on the other hand its mechanical characteristics are much lower than those of the alloys according to the invention.
- the invention makes it possible to obtain alloys having an improved corrosion resistance (uniform corrosion, generally reduced weight loss) while having increased mechanical characteristics for a high spinning temperature.
- This last advantage is important since such temperatures make it possible to spin profiles of large dimensions and / or increase the spinning speeds while retaining good mechanical characteristics.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Forging (AREA)
- Powder Metallurgy (AREA)
Claims (13)
- Magnesiumbasislegierung mit einer Bruchfestigkeit von mindestens 290 MPa und einer Dehnung beim Bruch von allgemein mindestens 5 %, die die Kombination der folgenden Elemente aufweist:
Sie hat eine Gewichtszusammensetzung, die in den folgenden Grenzen liegt:- Aluminium 2-11 %- Zink 0-12 %- Mangan 0-1 %- Calcium 0,5-7 %- Seltene Erden (SE) 0,1-4 %mit den folgenden Gehalten an Hauptverunreinigungen:- Silizium < 0,6 %- Kupfer < 0,2 %- Eisen < 0,1 %- Nickel < 0,01 %,wobei der Rest Magnesium ist,
sie hat eine mittlere Abmessung von Körnern unter 3 µm und besteht aus einer homogenen Matrix, die durch Teilchen intermetallischer Verbindungen Mg₁₇Aℓ₁₂, eventuell Aℓ₂Ca je nach der Ca-Konzentration, Mg₃₂(Aℓ, Zn)₄₉, wenn Zn in der Legierung vorliegt, Mg-SE und/oder Aℓ-SE je nach dem Gehalt und/oder der Art der Seltenen Erde verstärkt ist, welche Teilchen eine mittlere Größe unter 1 µm und vorzugsweise unter 0,5 µm haben und an den Korngrenzen ausgeschieden sind, wobei dieses Gefüge nach 24-stündigem Halten bei 300 °C unverändert bleibt. - Legierung nach dem Anspruch 1, dadurch gekennzeichnet, daß ihre Gewichtszusammensetzung in den folgenden Grenzen liegt:- Aluminium 3-9 %- Zink 0-3 %- Mangan 0,1-0,2 %- Calcium 1-7 %- SE 0,5-2,5 %mit den folgenden Gehalten an Hauptverunreinigungen:- Silizium 0,1-0,6 %- Kupfer < 0,2 %- Eisen < 0,1 %- Nickel < 0,01 %,wobei der Rest Magnesium ist.
- Legierung nach irgendeinem der Ansprüche 1 und 2, dadurch gekennzeichnet, daß die Seltenen Erden aus Y, Nd, Ce, La, Pr oder dem Mischmetall bestehen.
- Verfahren zur Herstellung einer Legierung nach den Ansprüchen 1 bis 3, dadurch gekennzeichnet, daß die Legierung im flüssigen Zustand einer raschen Abkühlung mit einer Geschwindigkeit von mindestens 10⁴K s⁻¹derart unterworfen wird, um ein erstarrtes Produkt zu erhalten, dessen wenigstens eine der Abmessungen unter 150 µm ist, und dann direkt bei einer Temperatur im Bereich von 200 bis 350 °C kompaktiert wird.
- Verfahren nach dem Anspruch 4, dadurch gekennzeichnet, daß die rasche Abkühlung durch Gießen auf eine stark gekühlte bewegliche Oberfläche in Form eines Endlosbandes einer Dicke unter 150 µm erreicht wird.
- Verfahren nach dem Anspruch 4,
dadurch gekennzeichnet,
daß die rasche Abkühlung durch Zerstäuben der flüssigen Legierung auf eine frei gehaltene, stark gekühlte Oberfläche erreicht wird. - Verfahren nach dem Anspruch 4, dadurch gekennzeichnet, daß die rasche Abkühlung durch Zerstäuben der flüssigen Legierung mittels eines Strahls von inertem Gas erreicht wird.
- Verfahren nach einem der Ansprüche 4, 5, 6, 7, dadurch gekennzeichnet, daß das rasch erstarrte Produkt durch ein Mittel kompaktiert wird, das unter dem Strangpressen, dem hydrostatischen Extrudieren, dem Walzen, dem Schmieden und der superplastischen Verformung gewählt ist.
- Verfahren nach dem Anspruch 8, dadurch gekennzeichnet, daß das rasch erstarrte Produkt durch Strangpressen bei einer Temperatur im Bereich von 200 bis 350 °C mit einem Preßgrad im Bereich von 10 bis 40 und vorzugsweise von 15 bis 20 und mit einer Vorrückgeschwindigkeit des Stempels der Presse zwischen 0,5 und 3 mm pro Sekunde kompaktiert wird.
- Verfahren nach Anspruch 9, dadurch gekennzeichnet, daß das rasch abgekühlte Produkt direkt in den Preßtopf der Strangpresse eingeführt wird.
- Verfahren nach Anspruch 9, dadurch gekennzeichnet, daß das rasch abgekühlte Produkt vorab in eine aus Aluminium, Magnesium oder einer Legierung auf Basis des einen oder des anderen dieser beiden Metalle bestehende metallische Hülle eingeführt wird.
- Verfahren nach irgendeinem der Ansprüche 9 bis 11, dadurch gekennzeichnet, daß das rasch erstarrte Produkt zunächst in Form eines Barrens bei einer Temperatur von höchstens 350 °C vorkompaktiert wird.
- Verfahren nach irgendeinem der Ansprüche 9 bis 11, dadurch gekennzeichnet, daß das rasch abgekühlte Produkt vor der Verdichtung unter Vakuum bei einer Temperatur unter oder gleich 350 °C entgast wird.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8911357A FR2651245B2 (fr) | 1988-02-26 | 1989-08-24 | Alliages de magnesium a haute resistance mecanique et procede d'obtention par solidification rapide. |
FR8911357 | 1989-08-24 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0419375A1 EP0419375A1 (de) | 1991-03-27 |
EP0419375B1 true EP0419375B1 (de) | 1994-04-06 |
Family
ID=9384979
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90420383A Expired - Lifetime EP0419375B1 (de) | 1989-08-24 | 1990-08-21 | Hochfeste Magnesiumlegierungen und Verfahren zu ihrer Herstellung durch rasche Erstarrung |
Country Status (5)
Country | Link |
---|---|
US (1) | US5078962A (de) |
EP (1) | EP0419375B1 (de) |
JP (1) | JPH0390530A (de) |
CA (1) | CA2023837C (de) |
DE (1) | DE69007920T2 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6846451B2 (en) | 2001-08-23 | 2005-01-25 | The Japan Steel Works, Ltd. | Magnesium alloy and magnesium alloy member superior in corrosion resistance |
Families Citing this family (51)
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JPH0533096A (ja) * | 1991-07-26 | 1993-02-09 | Toyota Motor Corp | 耐熱マグネシウム合金 |
JPH0543957A (ja) * | 1991-08-08 | 1993-02-23 | Mazda Motor Corp | Mg合金部材の製造方法 |
JP2741642B2 (ja) * | 1992-03-25 | 1998-04-22 | 三井金属鉱業株式会社 | 高強度マグネシウム合金 |
JPH0748646A (ja) * | 1993-03-15 | 1995-02-21 | Toyota Motor Corp | 高強度マグネシウム基合金及びその製造方法 |
JP2730847B2 (ja) * | 1993-06-28 | 1998-03-25 | 宇部興産株式会社 | 高温クリープ強度に優れた鋳物用マグネシウム合金 |
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JPH08134581A (ja) * | 1994-11-14 | 1996-05-28 | Mitsui Mining & Smelting Co Ltd | マグネシウム合金の製造方法 |
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JP3415987B2 (ja) * | 1996-04-04 | 2003-06-09 | マツダ株式会社 | 耐熱マグネシウム合金成形部材の成形方法 |
KR100252237B1 (ko) * | 1996-04-25 | 2000-04-15 | 정몽규 | 고압주조용 마그네슘 합금 |
US5855697A (en) * | 1997-05-21 | 1999-01-05 | Imra America, Inc. | Magnesium alloy having superior elevated-temperature properties and die castability |
IL125681A (en) * | 1998-08-06 | 2001-06-14 | Dead Sea Magnesium Ltd | Magnesium alloy for high temperature applications |
DE19915277A1 (de) * | 1999-04-03 | 2000-10-05 | Volkswagen Ag | Magnesiumlegierungen hoher Duktilität, Verfahren zu deren Herstellung und deren Verwendung |
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US6656246B2 (en) * | 2000-05-31 | 2003-12-02 | Honda Giken Kogyo Kabushiki Kaisha | Process for producing hydrogen absorbing alloy powder, hydrogen absorbing alloy powder, and hydrogen-storing tank for mounting in vehicle |
US6342180B1 (en) | 2000-06-05 | 2002-01-29 | Noranda, Inc. | Magnesium-based casting alloys having improved elevated temperature properties |
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JP6048217B2 (ja) * | 2013-02-28 | 2016-12-21 | セイコーエプソン株式会社 | マグネシウム基合金粉末およびマグネシウム基合金成形体 |
CN105385917B (zh) * | 2015-12-07 | 2017-06-20 | 赣州有色冶金研究所 | 高强度高塑性镁合金及其制备方法 |
JP6376209B2 (ja) * | 2016-11-21 | 2018-08-22 | セイコーエプソン株式会社 | マグネシウム基合金粉末およびマグネシウム基合金成形体 |
JP7194904B2 (ja) * | 2017-09-21 | 2022-12-23 | 株式会社戸畑製作所 | マグネシウム合金粉末 |
CN109161760B (zh) * | 2018-10-17 | 2020-05-05 | 山东省科学院新材料研究所 | 一种耐热镁合金及其制备方法 |
CN109136702A (zh) * | 2018-11-12 | 2019-01-04 | 东北大学 | 一种高铝高钙含量的变形镁合金及其制备方法 |
JP6814446B2 (ja) * | 2019-03-12 | 2021-01-20 | 本田技研工業株式会社 | 難燃性マグネシウム合金およびその製造方法 |
US20210062306A1 (en) * | 2019-08-29 | 2021-03-04 | Mag Specialties, Inc. | High strength, combustion-resistant, tube-extrudable aircraft-grade magnesium alloy |
CN114622109A (zh) * | 2022-03-14 | 2022-06-14 | 中南大学 | 快速凝固和挤压成型制备医用耐腐蚀镁锌锰合金的方法 |
CN115537619A (zh) * | 2022-09-22 | 2022-12-30 | 宁波尚镁新材料科技有限责任公司 | 用于炊具加工的镁合金、镁合金炊具及其加工方法 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB596102A (en) * | 1945-07-19 | 1947-12-29 | Rupert Martin Bradbury | A new magnesium base alloy |
SU395474A1 (ru) * | 1970-06-15 | 1973-08-28 | В П Т Ьf'^nup qj^nrssTn'iVUiiA Caiiit!-! SufsJ | |
US4765954A (en) * | 1985-09-30 | 1988-08-23 | Allied Corporation | Rapidly solidified high strength, corrosion resistant magnesium base metal alloys |
-
1990
- 1990-08-21 EP EP90420383A patent/EP0419375B1/de not_active Expired - Lifetime
- 1990-08-21 JP JP2219876A patent/JPH0390530A/ja active Pending
- 1990-08-21 DE DE69007920T patent/DE69007920T2/de not_active Expired - Fee Related
- 1990-08-23 US US07/571,226 patent/US5078962A/en not_active Expired - Fee Related
- 1990-08-23 CA CA002023837A patent/CA2023837C/fr not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6846451B2 (en) | 2001-08-23 | 2005-01-25 | The Japan Steel Works, Ltd. | Magnesium alloy and magnesium alloy member superior in corrosion resistance |
DE10236440B4 (de) * | 2001-08-23 | 2005-01-27 | The Japan Steel Works, Ltd. | Magnesiumlegierung und Magnesiumlegierungs-Formkörper mit verbesserter Korrosionsbeständigkeit |
Also Published As
Publication number | Publication date |
---|---|
DE69007920T2 (de) | 1994-07-21 |
EP0419375A1 (de) | 1991-03-27 |
JPH0390530A (ja) | 1991-04-16 |
DE69007920D1 (de) | 1994-05-11 |
CA2023837C (fr) | 1994-10-25 |
CA2023837A1 (fr) | 1991-02-25 |
US5078962A (en) | 1992-01-07 |
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