EP0948658B1 - TiAl-LEGIERUNG UND IHRE VERWENDUNG - Google Patents
TiAl-LEGIERUNG UND IHRE VERWENDUNG Download PDFInfo
- Publication number
- EP0948658B1 EP0948658B1 EP97948908A EP97948908A EP0948658B1 EP 0948658 B1 EP0948658 B1 EP 0948658B1 EP 97948908 A EP97948908 A EP 97948908A EP 97948908 A EP97948908 A EP 97948908A EP 0948658 B1 EP0948658 B1 EP 0948658B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- mpa
- room temperature
- alloy
- yield stress
- tial 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
Links
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 molybdenum-containing TiAl alloy high strength with good toughness or Ductility and its use in the manufacture of semi-finished products produced by hot forming and the products from them end products to be manufactured.
- TiAl-based alloys containing molybdenum are known.
- Min-Chul-Kim et al. (Materials Transactions, JIM, Vol. 37, No. 5 (1996), p. 1197) an alloy of the composition Ti 51 Al 48.4 Mo 0.6 , which has a yield stress of 300 MPa at 1.4% plastic at room temperature Shows stretch.
- an alloy of the composition Ti 50.8 Al 48.6 Mo 0.6 is known (Sumitomo Search No. 52 (1993) 74), which at room temperature reaches a yield stress of 365 MPa with a 1.2% plastic elongation.
- JP-A-129 8 127 describes a Ti-Al alloy with 2 at to Mo and 0.2 at% Si.
- the alloy has a yield stress of 36 kgf / mm 2 (533.16 MPa) at room temperature.
- the object of the invention is now a TiAl alloy to create the one at room temperature Yield stress of at least 400 MPa at a plastic elongation greater than 2% and after one Thermoforming a yield stress at room temperature of reached over 700 MPa.
- a TiAl alloy is used to achieve this object with 0.1 to 0.5 at% Si and 0.5 to 4.0 at% Mo, preferably 0.2 to 0.4 at% Si and 1 to 2 at% Mo, in particular 0.2 at% Si and 1.0 at% Mo are proposed.
- Such a TiAl alloy has a crack toughness K IC of greater than 30 MPa in the cast state with a lamellar microstructure. m 1/2 a yield stress at room temperature of greater than 400 MPa with a plastic elongation of over 2%. Oxidation tests in air at 850 ° C showed an increase in mass of less than 5 mg / cm 3 after 500 h. In contrast, a Ti 50 Al 50 reference alloy has an increase in mass of over 13 mg / cm 3 .
- the creep resistance was determined in comparison with a known TiAlCrSi alloy in a compression test. The creep stress (strain rate or creep speed: 10 -7 / S) of the alloy according to the invention is over 450 MPa at 800 ° C. In contrast, with the well-known, highly developed TiAl base alloy Ti 48 Al 48 Cr 2 Nb 2, the creep limit is reached at stresses of 240 MPa.
- the alloy according to the invention advantageously as Material for the production of in the temperature range formed from 1100 to 1350 ° C, in particular extruded objects with a yield stress of at least 700 MPa at room temperature, such as connecting rods, Piston pins and rotating components, e.g. Shoveling in Low pressure turbines, axial compressors and centrifuges.
- the invention is particularly advantageous TiAl alloy for intake and exhaust valves in Internal combustion engines.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Extrusion Of Metal (AREA)
- Forging (AREA)
Description
Claims (4)
- Verfahren zum Herstellen von thermisch und / oder mechanisch hoch belasteten Bauteilen, wie rotierend oder oszillierend bewegten Motorbauteilen,bei dem eine TiAl-Legierung, die(in Atom-%) 0,1 - 0,5 % Si sowie 0,5 - 4,0 % Mo enthält undim Gußzustand bei Raumtemperatur eine Fließspannung von mehr als 400 MPa bei einer plastischen Dehnung von mehr als 2% aufweist,
im Temperaturbereich von 1100 - 1350 °C warmverformt, insbesondere stranggepreßt wird,so daß sie im warmverformten Zustand bei Raumtemperatur eine Fließspannung von mehr als 700 MPa und bei einer Temperatur von 800 °C eine Fließspannung von 380 - 600 MPa besitzt. - Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß TiAl-Legierung
0,2 - 0,4 at-% Si und
1,0 - 2,0 at-% Mo
enthält. - Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß TiAl-Legierung
0,2 at-% Si und
1,0 at-% Mo
enthält. - Verfahren nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß die Bauteile bei Raumtemperatur oder tiefen Temperaturen eingesetzt werden.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19646361 | 1996-11-09 | ||
DE19646361 | 1996-11-09 | ||
PCT/EP1997/006222 WO1998021375A1 (de) | 1996-11-09 | 1997-11-10 | TiAl-LEGIERUNG UND IHRE VERWENDUNG |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0948658A1 EP0948658A1 (de) | 1999-10-13 |
EP0948658B1 true EP0948658B1 (de) | 2003-09-17 |
Family
ID=7811198
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97948908A Expired - Lifetime EP0948658B1 (de) | 1996-11-09 | 1997-11-10 | TiAl-LEGIERUNG UND IHRE VERWENDUNG |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0948658B1 (de) |
AT (1) | ATE250148T1 (de) |
DE (1) | DE19748874C2 (de) |
ES (1) | ES2207755T3 (de) |
WO (1) | WO1998021375A1 (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT2881U1 (de) * | 1998-06-08 | 1999-06-25 | Plansee Ag | Verfahren zur herstellung eines tellerventiles aus gamma-tial-basislegierungen |
DE10024343A1 (de) * | 2000-05-17 | 2001-11-22 | Gfe Met & Mat Gmbh | Bauteil auf Basis von gamma-TiAl-Legierungen mit Bereichen mit gradiertem Gefüge |
DE10134525A1 (de) * | 2001-07-16 | 2003-01-30 | Gfe Met & Mat Gmbh | Verfahren zum kapsellosen Umformen von gamma-TiAl-Werkstoffen |
DE10209347B4 (de) * | 2002-03-02 | 2005-12-08 | Daimlerchrysler Ag | Herstellungsverfahren für einen Turbinenradläufer |
DE102004056582B4 (de) * | 2004-11-23 | 2008-06-26 | Gkss-Forschungszentrum Geesthacht Gmbh | Legierung auf der Basis von Titanaluminiden |
DE102014200644B4 (de) * | 2014-01-16 | 2017-03-02 | MTU Aero Engines AG | Strangprofil und Verfahren zur Herstellung einer Schaufel eines Nachleitrads, Schaufel eines Nachleitrads, Nachleitrad und Turbomaschine mit solch einem Nachleitrad |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2679109B2 (ja) * | 1988-05-27 | 1997-11-19 | 住友金属工業株式会社 | 金属間化合物TiA▲l▼基軽量耐熱合金 |
JPH03219034A (ja) * | 1990-01-22 | 1991-09-26 | Sumitomo Metal Ind Ltd | 耐酸化性に優れた金属間化合物TiAl基合金 |
JPH03249147A (ja) * | 1990-02-27 | 1991-11-07 | Sumitomo Metal Ind Ltd | 耐酸化性に優れた金属間化合物TiAl基合金及びその製造方法 |
DE59106459D1 (de) * | 1990-05-04 | 1995-10-19 | Asea Brown Boveri | Hochtemperaturlegierung für Maschinenbauteile auf der Basis von dotiertem Titanaluminid. |
JPH05141213A (ja) * | 1991-11-18 | 1993-06-08 | Sumitomo Light Metal Ind Ltd | 内燃機関用吸・排気バルブ |
JP2707520B2 (ja) * | 1992-03-06 | 1998-01-28 | 大同特殊鋼株式会社 | Ti−Al系耐熱部品 |
DE4443147A1 (de) * | 1994-12-05 | 1996-06-27 | Dechema | Korrosionsbeständiger Werkstoff für Hochtemperaturanwendungen in sulfidierenden Prozeßgasen |
-
1997
- 1997-11-06 DE DE19748874A patent/DE19748874C2/de not_active Expired - Fee Related
- 1997-11-10 WO PCT/EP1997/006222 patent/WO1998021375A1/de active IP Right Grant
- 1997-11-10 AT AT97948908T patent/ATE250148T1/de not_active IP Right Cessation
- 1997-11-10 EP EP97948908A patent/EP0948658B1/de not_active Expired - Lifetime
- 1997-11-10 ES ES97948908T patent/ES2207755T3/es not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
WO1998021375A1 (de) | 1998-05-22 |
DE19748874C2 (de) | 2000-03-23 |
ES2207755T3 (es) | 2004-06-01 |
EP0948658A1 (de) | 1999-10-13 |
DE19748874A1 (de) | 1998-05-14 |
ATE250148T1 (de) | 2003-10-15 |
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