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WO1999049090A1 - PREALLIAGE DE TiAl - Google Patents

PREALLIAGE DE TiAl Download PDF

Info

Publication number
WO1999049090A1
WO1999049090A1 PCT/EP1999/001868 EP9901868W WO9949090A1 WO 1999049090 A1 WO1999049090 A1 WO 1999049090A1 EP 9901868 W EP9901868 W EP 9901868W WO 9949090 A1 WO9949090 A1 WO 9949090A1
Authority
WO
WIPO (PCT)
Prior art keywords
alloy
tial
tial base
base alloy
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.)
Ceased
Application number
PCT/EP1999/001868
Other languages
German (de)
English (en)
Inventor
Georg Frommeyer
Jürgen Wesemann
Sven Knippscheer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Max Planck Institut fuer Eisenforschung
Original Assignee
Max Planck Institut fuer Eisenforschung
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Max Planck Institut fuer Eisenforschung filed Critical Max Planck Institut fuer Eisenforschung
Priority to EP99913284A priority Critical patent/EP1070152B1/fr
Priority to AU31467/99A priority patent/AU3146799A/en
Priority to AT99913284T priority patent/ATE260996T1/de
Publication of WO1999049090A1 publication Critical patent/WO1999049090A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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 TiAl base alloy with a composition of titanium aluminide with 42 to 54 at.% Al, the remainder being titanium, to which further alloying elements can be added up to 12 at.
  • the invention is based on the object of modifying a TiAl base alloy in such a way that it has better properties than conventional alloys based on it in several respects. In particular, improved castability, formability and ductility with higher strength is sought.
  • a TiAl base alloy which contains 0.1 to 5 at.% Cu, preferably 0.2 to 1 at.% Cu.
  • the alloy may contain 0.1 to 2 at.% Si, preferably 0.1 to 0.3 at.% Si, and / or 0.1 to 5 at.% Mo, preferably 0.4 to 1, 2 at.% Mo, and / or 0.1 to 5 at.% Cr, preferably 0.4 to 1.2 at.% Cr, and up to a total of 12 at.% Further alloy elements.
  • one or more of the strength-increasing elements Nb, Mn, V, B, W, Ti, Ta, Zr m of the alloy can be contained as "further alloy elements".
  • the invention has proven to be particularly advantageous for the following alloys: - 2 -
  • the addition of copper to TiAl provided according to the invention results in a greatly reduced grain size or a significantly finer structured casting structure compared to TiAl base alloys without the addition of copper.
  • Lamellar TiAl base alloys with copper addition also have reduced lamella spacing. These effects are reinforced by the addition of silicon.
  • the addition of copper leads to an increased strength of TiAl base alloys with increased ductility compared to comparable alloys. Arm formability is also improved. As a result, the forming of TiAl base alloys with copper addition can be carried out with lower forces or at lower temperatures than with comparable alloys.
  • At least 0.1 at% Cu is required to achieve the desired effects. More than 5 at.-o cause embrittlement and are therefore not useful. Even small amounts of the order of magnitude up to 0.2 at.% Cu improve the castability by reducing the melt viscosity and, compared to comparable alloys without the addition of Cu, result in a significantly finer structured casting structure.
  • Figure 1 shows the solidification structure of a T1AIM0S1 alloy.
  • TiAl base alloys with copper addition represented by the T ⁇ 52 Al 4 6 sCu.Sio 2 ⁇ alloy according to Figure 2
  • Figures 3 and 4 show, the grain-refining influence of the - 3 -
  • Copper additive to TiAl is also pronounced after the alloy has been annealed for 30 mm at 1400 ° C.
  • Figure 5 shows the temperature-dependent fracture upsets of modified TiAl alloys with copper addition compared to a TI 52 A1 P 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 the TiAl base alloys with copper addition leads to improved hot formability.
  • R c S ⁇ 2- alloy has, for example with upsetting boundaries between 580 MPa at room temperature and 538 MPa at 800 ° C, a higher compression strength than an already high strength T I 5 Al "M ⁇ S ⁇ 0 -? Alloy.
  • the TiAl base alloy according to the invention is suitable as a construction material for cast female parts, but also for parts which are produced by extrusion, isothermal forging and / or superplastic forming to the desired final shape.
  • Application examples are valves for internal combustion engines, piston crown segments, turbocharger rotors and components for turbines and compressors.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Forging (AREA)
  • Physical Vapour Deposition (AREA)
  • Conductive Materials (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Continuous Casting (AREA)

Abstract

L'invention concerne un préalliage de TiAl sous la forme d'un mélange d'aluminure de titane renfermant 42 à 54 at. % d'Al et le solde de titane, auxquels peuvent être ajoutés jusqu'à 12 at. %, par rapport au TiAl, d'autres éléments d'alliage. La caractéristique de l'invention est le fait que l'alliage contient 0,1 à 5 at. % de cuivre.
PCT/EP1999/001868 1998-03-21 1999-03-20 PREALLIAGE DE TiAl Ceased WO1999049090A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP99913284A EP1070152B1 (fr) 1998-03-21 1999-03-20 PREALLIAGE DE TiAl
AU31467/99A AU3146799A (en) 1998-03-21 1999-03-20 Tial base alloy
AT99913284T ATE260996T1 (de) 1998-03-21 1999-03-20 Tial-basislegierung

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19812444A DE19812444B4 (de) 1998-03-21 1998-03-21 TiAl-Basislegierung
DE19812444.9 1998-03-21

Publications (1)

Publication Number Publication Date
WO1999049090A1 true WO1999049090A1 (fr) 1999-09-30

Family

ID=7861797

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1999/001868 Ceased WO1999049090A1 (fr) 1998-03-21 1999-03-20 PREALLIAGE DE TiAl

Country Status (5)

Country Link
EP (1) EP1070152B1 (fr)
AT (1) ATE260996T1 (fr)
AU (1) AU3146799A (fr)
DE (1) DE19812444B4 (fr)
WO (1) WO1999049090A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6294132B1 (en) * 1996-10-28 2001-09-25 Mitsubishi Heavy Industries Ltd. TiAl intermetallic compound-based alloy

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2006260791B2 (en) * 2005-06-21 2011-12-22 University Of Leeds Electrode
GB0512836D0 (en) * 2005-06-21 2005-08-03 Jha Animesh Inert alloy anodes for aluminium electrolysis cell using molten salt bath confidential
WO2007108178A1 (fr) * 2006-03-17 2007-09-27 University Of Tsukuba Alliage de titane et de tantale a memoire de forme, actionneur et moteur

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4865666A (en) * 1987-10-14 1989-09-12 Martin Marietta Corporation Multicomponent, low density cubic L12 aluminides
JPH03226538A (ja) * 1990-01-30 1991-10-07 Nkk Corp ＴｉＡｌ基耐熱合金及びその製造方法
JPH04235262A (ja) * 1991-01-08 1992-08-24 Mitsubishi Materials Corp 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

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1179006B (de) * 1952-12-18 1964-10-01 Crucible Steel Internat Titanlegierungen
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

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4865666A (en) * 1987-10-14 1989-09-12 Martin Marietta Corporation Multicomponent, low density cubic L12 aluminides
JPH03226538A (ja) * 1990-01-30 1991-10-07 Nkk Corp ＴｉＡｌ基耐熱合金及びその製造方法
JPH04235262A (ja) * 1991-01-08 1992-08-24 Mitsubishi Materials Corp 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

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 015, no. 512 (C - 0898) 26 December 1991 (1991-12-26) *
PATENT ABSTRACTS OF JAPAN vol. 016, no. 584 (C - 1013) 24 December 1992 (1992-12-24) *
PATENT ABSTRACTS OF JAPAN vol. 017, no. 693 (C - 1144) 17 December 1993 (1993-12-17) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6294132B1 (en) * 1996-10-28 2001-09-25 Mitsubishi Heavy Industries Ltd. TiAl intermetallic compound-based alloy

Also Published As

Publication number Publication date
ATE260996T1 (de) 2004-03-15
EP1070152A1 (fr) 2001-01-24
DE19812444A1 (de) 1999-09-30
AU3146799A (en) 1999-10-18
EP1070152B1 (fr) 2004-03-03
DE19812444B4 (de) 2004-02-19

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