EP1070152B1 - TiAl-BASISLEGIERUNG - Google Patents
TiAl-BASISLEGIERUNG Download PDFInfo
- Publication number
- EP1070152B1 EP1070152B1 EP99913284A EP99913284A EP1070152B1 EP 1070152 B1 EP1070152 B1 EP 1070152B1 EP 99913284 A EP99913284 A EP 99913284A EP 99913284 A EP99913284 A EP 99913284A EP 1070152 B1 EP1070152 B1 EP 1070152B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- alloy
- tial
- atom
- copper
- base alloy
- 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
- C22C14/00—Alloys based on titanium
Definitions
- the invention relates to a TiAl base alloy with a Composition of the titanium aluminide with 42 to 54 at .-% Al, Balance titanium, which up to 12 at .-% based on TiAl further Alloy elements can be added.
- TiAl alloys of this type are for example from JP-A-5230570, the JP-A-4235262 or JP-A-3226538 are known.
- a TiAl alloy is used in JP-A-3226538 described in their basic composition 40 - 56.6 at .-% Al, 0.2 - 0.82 at .-% Nb, 0.35 - 4.84 at .-% Si as well further alloying elements, such as Cu, the rest Contains titanium and inevitable impurities.
- the known alloy is said to have improved strength have improved ductility at the same time.
- the one in JP-A-3226538 contained examples show that the state of the Technology with Al contents in the range of 42 - 54 at .-% Si contents are provided in the range of 0.35 - 4.7 at .-%. Silicon is used in this Connection has a heat-increasing effect attributed.
- Si contents given in JP-A-3226538 Range from 1.04 - 1.20 at%.
- the invention has for its object a TiAl base alloy to be modified in such a way that has better properties than conventional alloys on this basis. In particular will have improved castability, hot formability and Ductility aimed at higher strength.
- the alloy according to the invention can 0.1 to 5 at .-% Mo, preferably 0.4 to 1.2 at.% Mo, and / or 0.1 - 5 at.% Cr, preferably 0.4 to 1.2 at.% Cr, and up to contain a total of 12 at .-% further alloying elements. Up to 2 at.% In total, one or more of the strength-increasing elements Nb, Mn, V, B, W, Ti, Ta, Zr contained in the alloy as "further alloy elements" his.
- the addition of copper to TiAl provided according to the invention causes a greatly reduced grain size or a compared to a much finer structured cast structure TiAl base alloys without the addition of copper.
- Lamellar TiAl base alloys with copper addition also point reduced slat spacing. These effects will be reinforced by the addition of silicon.
- the addition of copper leads to increased strength of TiAl base alloys with comparable alloys increased ductility.
- the Improved hot formability Forming of TiAl base alloys with copper additive can lower forces or at lower temperatures than with comparable alloys.
- At least 0.1 at.% Cu is required to achieve the bring about the desired effects. More than 5 at .-% cause embrittlement and are therefore not meaningful. Even small quantities in the order of up to 0.2 at .-% Cu improve the castability through a Reduce melt viscosity and counteract comparable alloys without the addition of Cu fine structured cast structure.
- Figure 1 shows the solidification structure of a TiAlMoSi alloy.
- TiAl base alloys with copper addition represented by the Ti 52 Al 46.8 Cu 1 Si 0.2 alloy according to Figure 2
- Figures 3 and 4 the grain-refining influence of the addition of copper to TiAl is still pronounced after the alloy has been annealed for 30 min at 1400 ° C.
- Figure 5 shows the temperature-dependent fracture upsets of modified TiAl alloys with copper addition compared to a Ti 52 Al 48 and a TiAlMoSi alloy.
- the strength of TiAl base alloys is significantly increased by the addition of copper to TiAl provided according to the invention.
- the comparatively steep drop in strength at temperatures> 800 ° C for TiAl base alloys with copper addition leads to improved hot formability.
- the Ti 52 Al 46.5 Mo 0.5 Cu 0.6 Si 0.2 alloy for example with compression limits between 580 MPa at room temperature and 538 MPa at 800 ° C, has a higher compression limit than an already high-strength Ti 52 Al 46.8 Mo 1 Si 0.2 alloy.
- the Ti 52 Al 46.5 Mo 0.5 Cu 0.8 Si 0.2 alloy shows a significantly lower deformation resistance than the Ti 52 Al 46.8 Mo 1 Si 0.2 alloy.
- the Ti 52 Al 46.5 Mo 0.5 Cu 0.8 Si 0.2 alloy like other alloy modifications with added copper, is characterized by improved ductility.
- Figures 5 and 6 show that the variation of the copper content or the alloy composition enables an optimal combination of properties of strength, ductility and formability to be set.
- the TiAl base alloy according to the invention is suitable as Construction material for investment castings, but also for Parts by extrusion, isothermal forging and / or superplastic forming to the desired one Final shape are generated.
- Examples of applications are valves for internal combustion engines, piston crown segments, Turbocharger rotors and components for turbines and Compressor.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physical Vapour Deposition (AREA)
- Conductive Materials (AREA)
- Forging (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Continuous Casting (AREA)
Description
Die Bilder 5 und 6 belegen, daß durch die Variation des Kupfergehaltes bzw. der Legierungszusammensetzung die Einstellung einer optimalen Eigenschaftskombination aus Festigkeit, Duktilität und Umformbarkeit möglich ist.
Claims (3)
- TiAl-Basislegierung mit 42 bis 54 at.-% Aluminium, der insgesamt bis 12 at.-%, bezogen auf TiAl, Legierungselemente zugesetzt sein können, Rest Titan und unvermeidbare Verunreinigungen, wobei die TiAl-Basislegierung als Legierungselemente0,1 bis 5 at.-% Kupfer0,1 bis 0,3 at.-% Silizium0,1 bis 5 at.-% Mo,0,1 bis 5 at.-% Cr und / oderbis insgesamt 2 at.-% eines oder mehrerer derElemente Nb, Mn, V, B, W, Ti, Ta, Zr
- TiAl-Basislegierung nach Anspruch 1, dadurch gekennzeichnet, daß sie 0,2 bis 1 at.-% Cu enthält.
- TiAl-Basislegierung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß sie als weitere Legierungselemente 0,4 bis 1,2 at.-% Mo und/oder 0,4 bis 1,2 at.-% Cr enthält.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19812444A DE19812444B4 (de) | 1998-03-21 | 1998-03-21 | TiAl-Basislegierung |
DE19812444 | 1998-03-21 | ||
PCT/EP1999/001868 WO1999049090A1 (de) | 1998-03-21 | 1999-03-20 | TiA1-BASISLEGIERUNG |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1070152A1 EP1070152A1 (de) | 2001-01-24 |
EP1070152B1 true EP1070152B1 (de) | 2004-03-03 |
Family
ID=7861797
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99913284A Expired - Lifetime EP1070152B1 (de) | 1998-03-21 | 1999-03-20 | TiAl-BASISLEGIERUNG |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1070152B1 (de) |
AT (1) | ATE260996T1 (de) |
AU (1) | AU3146799A (de) |
DE (1) | DE19812444B4 (de) |
WO (1) | WO1999049090A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2339041A1 (de) * | 2006-03-17 | 2011-06-29 | University of Tsukuba | Aktuator und Motor |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3492118B2 (ja) * | 1996-10-28 | 2004-02-03 | 三菱重工業株式会社 | TiAl金属間化合物基合金 |
GB0512836D0 (en) * | 2005-06-21 | 2005-08-03 | Jha Animesh | Inert alloy anodes for aluminium electrolysis cell using molten salt bath confidential |
EP1904668A2 (de) * | 2005-06-21 | 2008-04-02 | University Of Leeds | Elektrode |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1179006B (de) * | 1952-12-18 | 1964-10-01 | Crucible Steel Internat | Titanlegierungen |
US4865666A (en) * | 1987-10-14 | 1989-09-12 | Martin Marietta Corporation | Multicomponent, low density cubic L12 aluminides |
JP2952924B2 (ja) * | 1990-01-30 | 1999-09-27 | 日本鋼管株式会社 | TiAl基耐熱合金及びその製造方法 |
JP2817427B2 (ja) * | 1991-01-08 | 1998-10-30 | 三菱マテリアル株式会社 | 強度および延性に優れたTiAl金属間化合物系Ti合金の製造法 |
JPH05230570A (ja) * | 1992-02-21 | 1993-09-07 | Toyota Motor Corp | 高延性TiAl基合金 |
JPH06116692A (ja) * | 1992-10-05 | 1994-04-26 | Honda Motor Co Ltd | 高温強度の優れたTiAl系金属間化合物およびその製造方法 |
-
1998
- 1998-03-21 DE DE19812444A patent/DE19812444B4/de not_active Expired - Fee Related
-
1999
- 1999-03-20 AT AT99913284T patent/ATE260996T1/de not_active IP Right Cessation
- 1999-03-20 EP EP99913284A patent/EP1070152B1/de not_active Expired - Lifetime
- 1999-03-20 AU AU31467/99A patent/AU3146799A/en not_active Abandoned
- 1999-03-20 WO PCT/EP1999/001868 patent/WO1999049090A1/de active IP Right Grant
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2339041A1 (de) * | 2006-03-17 | 2011-06-29 | University of Tsukuba | Aktuator und Motor |
Also Published As
Publication number | Publication date |
---|---|
AU3146799A (en) | 1999-10-18 |
DE19812444B4 (de) | 2004-02-19 |
ATE260996T1 (de) | 2004-03-15 |
DE19812444A1 (de) | 1999-09-30 |
EP1070152A1 (de) | 2001-01-24 |
WO1999049090A1 (de) | 1999-09-30 |
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