WO1998021375A1 - ALLIAGE TiAl ET SON APPLICATION - Google Patents

ALLIAGE TiAl ET SON APPLICATION Download PDF

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Publication number
WO1998021375A1
WO1998021375A1 PCT/EP1997/006222 EP9706222W WO9821375A1 WO 1998021375 A1 WO1998021375 A1 WO 1998021375A1 EP 9706222 W EP9706222 W EP 9706222W WO 9821375 A1 WO9821375 A1 WO 9821375A1
Authority
WO
WIPO (PCT)
Prior art keywords
tial alloy
mpa
alloy
room temperature
tial
Prior art date
Application number
PCT/EP1997/006222
Other languages
German (de)
English (en)
Inventor
Georg Frommeyer
Jürgen Wesemann
Original Assignee
Georg Frommeyer
Wesemann Juergen
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 Georg Frommeyer, Wesemann Juergen filed Critical Georg Frommeyer
Priority to AT97948908T priority Critical patent/ATE250148T1/de
Priority to EP97948908A priority patent/EP0948658B1/fr
Publication of WO1998021375A1 publication Critical patent/WO1998021375A1/fr

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 of high strength with good toughness or ductility and its use for the production of semi-finished products produced by hot forming and the end products to be produced therefrom.
  • 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 0f6 , which has a yield stress of 300 MPa at 1.4% plastic elongation at room temperature .
  • an alloy of the composition Ti 508 A1 48/6 Mo 016 is known (Sumitomo Search No. 52 (1993) 74), which at room temperature achieves a yield stress of 365 MPa with a 1.2% plastic elongation.
  • the invention is based on the object of creating a TiAl alloy which, at room temperature, has a yield stress of at least 400 MPa with a plastic elongation of greater than 2% and, after hot deformation, a yield stress at room temperature of over 700 MPa.
  • a TiAl alloy 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.
  • Oxidation tests in air at 850 ° C showed an increase in mass of less than 5 mg / cm 3 after 500 h.
  • 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.
  • the creep limit is already at stresses in the known highly developed TiAl base alloy Ti 48 Al 48 Cr 2 Nb 2 reached of 240 MPa.
  • a micro-duplex structure is set, which can achieve extremely high strengths up to 1000 ° C.
  • This is in contrast to the previous expert opinion, according to which a coarse-grained cast structure compared to a thermomechanically processed fine-grained structure was ascribed a higher high-temperature strength - yield strength and tensile strength.
  • the yield stress in the extruded state with fine-grained equiaxial structure is 700 to 800 MPa at room temperature, 380 to 600 MPa at 800 ° C and up to 180 MPa at 1000 ° C.
  • the yield stresses are therefore significantly higher than the previously known TiAl alloys in the extruded state, which only reach 600 MPa at room temperature and 400 MPa at 760 ° C.
  • the alloy according to the invention is advantageously suitable as a material for the production of, in particular, extruded objects in the temperature range from 1100 to 1350 ° C. with a yield stress of at least 700 MPa at room temperature, such as connecting rods, piston pins and rotating components, for example blades in low pressure turbines, axial compressors and centrifuges.
  • the TiAl alloy according to the invention is particularly advantageously suitable 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)

Abstract

L'invention concerne un alliage TiAl comprenant 0,1 à 0,5 at % de Si et de 0,5 à 4,0 at % de Mo, ainsi que l'utilisation d'un tel alliage comme matériau pour la fabrication de semi-produits formés à chaud, en particulier extrudés, dans une plage de température comprise entre 1100 et 1350 DEG C, et de produits finis en résultant, avec une contrainte d'écoulement d'au moins 700 Mpa à température ambiante, en particulier de soupapes d'admission et d'échappement pour moteurs à combustion interne.
PCT/EP1997/006222 1996-11-09 1997-11-10 ALLIAGE TiAl ET SON APPLICATION WO1998021375A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AT97948908T ATE250148T1 (de) 1996-11-09 1997-11-10 Tial-legierung und ihre verwendung
EP97948908A EP0948658B1 (fr) 1996-11-09 1997-11-10 ALLIAGE TiAl ET SON APPLICATION

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19646361 1996-11-09
DE19646361.0 1996-11-09

Publications (1)

Publication Number Publication Date
WO1998021375A1 true WO1998021375A1 (fr) 1998-05-22

Family

ID=7811198

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1997/006222 WO1998021375A1 (fr) 1996-11-09 1997-11-10 ALLIAGE TiAl ET SON APPLICATION

Country Status (5)

Country Link
EP (1) EP0948658B1 (fr)
AT (1) ATE250148T1 (fr)
DE (1) DE19748874C2 (fr)
ES (1) ES2207755T3 (fr)
WO (1) WO1998021375A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100544955B1 (ko) * 1998-06-08 2006-01-24 신터스탈 게엠베하 내연기관용 γ-ＴｉＡｌ 베이스 합금의 포핏밸브의 제조방법
WO2006056248A1 (fr) * 2004-11-23 2006-06-01 Gkss-Forschungszentrum Geesthacht Gmbh Alliage a base d'aluminides de titane
US9920640B2 (en) * 2014-01-16 2018-03-20 MTU Aero Engines AG Extruded profile for manufacturing a blade of an outlet guide vane

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01298127A (ja) * 1988-05-27 1989-12-01 Sumitomo Metal Ind Ltd 金属間化合物ＴｉＡｌ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
US5207982A (en) * 1990-05-04 1993-05-04 Asea Brown Boveri Ltd. High temperature alloy for machine components based on doped tial
EP0543353A1 (fr) * 1991-11-18 1993-05-26 Sumitomo Light Metal Industries, Ltd. Procédé de fabrication d'une soupape d'admission ou d'échappement pour un moteur à combustion interne
JPH05247566A (ja) * 1992-03-06 1993-09-24 Daido Steel Co Ltd Ｔｉ−Ａｌ系耐熱部品
EP0716154A2 (fr) * 1994-12-05 1996-06-12 DECHEMA Deutsche Gesellschaft für Chemisches Apparatewesen, Chemische Technik und Biotechnologie e.V. Matériau résistant à la corrosion et résistant aux températures élevées

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01298127A (ja) * 1988-05-27 1989-12-01 Sumitomo Metal Ind Ltd 金属間化合物ＴｉＡｌ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
US5207982A (en) * 1990-05-04 1993-05-04 Asea Brown Boveri Ltd. High temperature alloy for machine components based on doped tial
EP0543353A1 (fr) * 1991-11-18 1993-05-26 Sumitomo Light Metal Industries, Ltd. Procédé de fabrication d'une soupape d'admission ou d'échappement pour un moteur à combustion interne
JPH05247566A (ja) * 1992-03-06 1993-09-24 Daido Steel Co Ltd Ｔｉ−Ａｌ系耐熱部品
EP0716154A2 (fr) * 1994-12-05 1996-06-12 DECHEMA Deutsche Gesellschaft für Chemisches Apparatewesen, Chemische Technik und Biotechnologie e.V. Matériau résistant à la corrosion et résistant aux températures élevées

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Section Ch Week 9151, Derwent World Patents Index; Class M26, AN 91-372328, XP002055395 *
DATABASE WPI Section Ch Week 9343, Derwent World Patents Index; Class M26, AN 93-340055, XP002055399 *
PATENT ABSTRACTS OF JAPAN vol. 014, no. 080 (C - 0689) 15 February 1990 (1990-02-15) *
PATENT ABSTRACTS OF JAPAN vol. 015, no. 500 (C - 0895) 18 December 1991 (1991-12-18) *
S.R.LAMPMAN ET AL: "METALS HANDBOOK, VOL 2, 10TH EDITION", 1990, ASM INTERNATIONAL, METALS PARK OHIO US, XP002055394 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100544955B1 (ko) * 1998-06-08 2006-01-24 신터스탈 게엠베하 내연기관용 γ-ＴｉＡｌ 베이스 합금의 포핏밸브의 제조방법
WO2006056248A1 (fr) * 2004-11-23 2006-06-01 Gkss-Forschungszentrum Geesthacht Gmbh Alliage a base d'aluminides de titane
US9920640B2 (en) * 2014-01-16 2018-03-20 MTU Aero Engines AG Extruded profile for manufacturing a blade of an outlet guide vane

Also Published As

Publication number Publication date
EP0948658B1 (fr) 2003-09-17
ATE250148T1 (de) 2003-10-15
ES2207755T3 (es) 2004-06-01
EP0948658A1 (fr) 1999-10-13
DE19748874C2 (de) 2000-03-23
DE19748874A1 (de) 1998-05-14

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