EP1195445A1 - Legierung auf der AlTi Basis mit Bor, Wolfram und Silizium - Google Patents
Legierung auf der AlTi Basis mit Bor, Wolfram und Silizium Download PDFInfo
- Publication number
- EP1195445A1 EP1195445A1 EP01123551A EP01123551A EP1195445A1 EP 1195445 A1 EP1195445 A1 EP 1195445A1 EP 01123551 A EP01123551 A EP 01123551A EP 01123551 A EP01123551 A EP 01123551A EP 1195445 A1 EP1195445 A1 EP 1195445A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- alloy
- balance
- tungsten
- silicon
- rest
- 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.)
- Granted
Links
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 42
- 239000000956 alloy Substances 0.000 title claims abstract description 42
- 229910052796 boron Inorganic materials 0.000 title abstract description 25
- 229910052710 silicon Inorganic materials 0.000 title abstract description 21
- 229910052721 tungsten Inorganic materials 0.000 title abstract description 21
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 title abstract description 10
- 239000010703 silicon Substances 0.000 title abstract 4
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 title abstract 4
- 239000010937 tungsten Substances 0.000 title abstract 4
- 229910021324 titanium aluminide Inorganic materials 0.000 title description 4
- OQPDWFJSZHWILH-UHFFFAOYSA-N [Al].[Al].[Al].[Ti] Chemical compound [Al].[Al].[Al].[Ti] OQPDWFJSZHWILH-UHFFFAOYSA-N 0.000 title description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 title 1
- 239000000203 mixture Substances 0.000 claims description 14
- 229910010038 TiAl Inorganic materials 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 239000012535 impurity Substances 0.000 claims description 5
- 238000011109 contamination Methods 0.000 claims 1
- 239000010936 titanium Substances 0.000 abstract description 12
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 abstract description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052782 aluminium Inorganic materials 0.000 abstract description 4
- 229910052719 titanium Inorganic materials 0.000 abstract description 4
- 230000003647 oxidation Effects 0.000 description 7
- 238000007254 oxidation reaction Methods 0.000 description 7
- 229910052804 chromium Inorganic materials 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 238000007792 addition Methods 0.000 description 5
- 229910000765 intermetallic Inorganic materials 0.000 description 5
- 239000007789 gas Substances 0.000 description 4
- 229910052758 niobium Inorganic materials 0.000 description 4
- 229910052763 palladium Inorganic materials 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 4
- 238000007711 solidification Methods 0.000 description 4
- 230000008023 solidification Effects 0.000 description 4
- 229910052715 tantalum Inorganic materials 0.000 description 4
- 229910052727 yttrium Inorganic materials 0.000 description 4
- 229910052726 zirconium Inorganic materials 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000001513 hot isostatic pressing Methods 0.000 description 3
- 229910052748 manganese Inorganic materials 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 238000005275 alloying Methods 0.000 description 2
- 238000005495 investment casting Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 229910000601 superalloy Inorganic materials 0.000 description 2
- 150000003608 titanium Chemical class 0.000 description 2
- 229910000951 Aluminide Inorganic materials 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229940082150 encore Drugs 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052735 hafnium Inorganic materials 0.000 description 1
- 229910001234 light alloy Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000001000 micrograph Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
Images
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 high temperature alloy for thermal Machines based on intermetallic compounds, which are suitable for Investment casting and directional solidification are suitable, as are conventional nickel-based superalloys complete.
- Intermetallic compounds of titanium with aluminum have some interesting properties, which they as construction materials in the middle and higher temperature range appear attractive. That is part of it among other things, their lower density compared to superalloys. Of their technical usability in its present form stands for its brittleness opposite. This can be improved with certain additives.
- the heat resistance of the known aluminides leaves a lot to be desired.
- the strength, in particular the creep resistance, in the upper temperature range insufficient.
- EP-A1-0 363 598 describes a high-temperature alloy based on TiAl Additions to Si and Nb emerge, but one from EP-A1-0 405 134 High temperature alloy based on TiAl with additions of Si and Cr.
- the invention attempts to further increase this known high temperature alloy improve. It is based on the task of using a light alloy improved heat resistance and ductility at high temperatures (in the range from 600 to 1000 ° C) and good oxidation and corrosion resistance specify that is well suited for directional solidification or for investment casting and in consists essentially of a high-melting intermetallic compound.
- the core of the invention is compared to the known alloys on the one hand reduced AI content, on the other hand the possibility of a much higher B content to realize.
- the advantages of the invention are that by combining the Alloying elements mentioned, but especially due to the higher B content succeeds on the one hand a very fine grain in both thin and to produce large cross sections and thus the toughness and Increase creep resistance and good oxidation resistance to achieve.
- the lowering of the Al content compared to the known level technology increases strength, but at the same time favors that Grain coarsening.
- Boron on the other hand, stabilizes the grain boundaries, i.e. H. the higher Boron levels reduce grain coarsening.
- the individual elements with a degree of purity served as starting materials of 99.99%.
- the melt became a cast blank of approximately 50 mm each Molded diameter and approx. 70 mm height. These blanks were under Protective gas melted again and also under protective gas for solidification in the form of rods with a diameter of approx. 9 mm and a length of approx. 70 mm forced. These rods were a HIP (HOT ISOSTATIC PRESSING) and Subjected to heat treatment and then processed into tensile tests. The HIP treatment was carried out for 4 hours at a temperature of 1260 ° C and a pressure of 172 MPa. The heat treatment was carried out under protective gas following parameters: 1350 ° C / 1 h + 1000 ° C / 6 h.
- Figures 1 to 6 show the structure of the alloys L1, L2, L3, L4 as well as V1 and V2.
- the structure of the alloys L1, L2, L3 and L4 according to the invention (FIGS. 1 to 4) is much more fine-grained than the structure of the comparative alloy V1 (FIG. 5), which is alloyed with lower B contents or than the comparative alloy VL2, which contains no boron.
- alloy 7 shows a diagram for the alloys L1, L2 and L3 according to the invention as well as the comparative alloys V1 and V2 the hardness values depending on Boron content. Alloys L1, L2 and L3 show a greater hardness than the comparison alloys. The hardness values are particularly good Alloy L1 according to the invention with 1.8 at.% boron.
- the area of application of the modified titanium aluminides advantageously extends to a temperature range between 600 and 1000 ° C.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
Description
El = B, Ge oder Si und Me = Cr, Mn, Nb, Pd, Ta, W, Y, Zr und es gilt:
- Fig.
- 1 eine Gefügebild einer erfindungsgemässen Legierung L1 mit folgender Zusammensetzung: Al 45 At.%, W 2 At.%, Si 0,4 At.%, B 1,8 At.%, Rest Ti;
- Fig. 2
- eine Gefügebild einer erfindungsgemässen Legierung L2 mit folgender Zusammensetzung: Al 45 At.%, W 2 At.%, Si 0,47 At.%, B 2,5 At.%, Rest Ti;
- Fig. 3
- ein Gefügebild einer erfindungsgemässen Legierung L3 mit folgender Zusammensetzung: Al 45 At.%, W 1,9 At.%, Si 0,46 At.%, B 3,5 At.%, Rest Ti;
- Fig. 4
- ein Gefügebild einer erfindungsgemässen Legierung L4 mit folgender Zusammensetzung: Al 44,9 At.%, W 1,9 At.%, Si 0,46 At.%, B 4 At.%, Rest Ti;
- Fig. 5
- ein Gefügebild einer Vergleichslegierung V1 mit folgender Zusammensetzung: Al 46 At.%, W 2 At.%, Si 0,48 At.%, B 0,7 At.%, Rest Ti;
- Fig. 6
- ein Gefügebild einer Vergleichslegierung V2 mit folgender Zusammensetzung: Al 47 At.%, W 2 At.%, Si 0,5 At.%, Rest Ti;
- Fig. 7
- eine Darstellung der Härte in Abhängigkeit vom Bor-Gehalt.
| Legierung | Ti | Al | W | Si | B |
| L1 | Rest | 45 | 2 | 0,40 | 1,8 |
| L2 | Rest | 45 | 2 | 0,47 | 2,5 |
| L2 | Rest | 45 | 1,9 | 0,46 | 3,5 |
| L4 | Rest | 44,9 | 1,9 | 0,46 | 4,0 |
| V1 | Rest | 46 | 2 | 0,48 | 0,7 |
| V2 | Rest | 47 | 2 | 0,50 | 0 |
Claims (3)
- Hochtemperaturlegierung für ein mechanisch hochbeanspruchtes Bauteil einer thermischen Maschine auf der Basis von dotiertem TiAl mit folgender Zusammensetzung (in Atom%):Rest Ti und herstellungsbedingte Verunreinigungen.44,5 bis <46 Al1-4 W0,1-1,5 Si0.0001-4 B.
- Hochtemperaturlegierung nach Anspruch 1 mit folgender Zusammensetzung (in Atom%):Rest Ti und herstellungsbedingte Verunreinigungen.44,5 bis <46 Al1-3 W0,4-1 Si1-4 B
- Hochtemperaturlegierung nach Anspruch 1 mit folgender Zusammensetzung (in Atom%):Rest Ti und herstellungsbedingte Verunreinigung.45 Al2W0,5 Si2B
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10049026A DE10049026A1 (de) | 2000-10-04 | 2000-10-04 | Hochtemperaturlegierung |
| DE10049026 | 2000-10-04 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1195445A1 true EP1195445A1 (de) | 2002-04-10 |
| EP1195445B1 EP1195445B1 (de) | 2004-02-11 |
Family
ID=7658584
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01123551A Expired - Lifetime EP1195445B1 (de) | 2000-10-04 | 2001-10-01 | Ti Al-Legierung mit Bor, Wolfram und Silizium |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US6676897B2 (de) |
| EP (1) | EP1195445B1 (de) |
| DE (2) | DE10049026A1 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109280786A (zh) * | 2018-11-22 | 2019-01-29 | 河北四通新型金属材料股份有限公司 | 一种铝钨中间合金及其生产方法 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4842820A (en) * | 1987-12-28 | 1989-06-27 | General Electric Company | Boron-modified titanium aluminum alloys and method of preparation |
| EP0455005A1 (de) * | 1990-05-04 | 1991-11-06 | Asea Brown Boveri Ag | Hochtemperaturlegierung für Maschinenbauteile auf der Basis von dotiertem Titanaluminid |
| US5908516A (en) * | 1996-08-28 | 1999-06-01 | Nguyen-Dinh; Xuan | Titanium Aluminide alloys containing Boron, Chromium, Silicon and Tungsten |
| DE19933633A1 (de) * | 1999-07-17 | 2001-01-18 | Abb Alstom Power Ch Ag | Hochtemperaturlegierung |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3203794A (en) | 1957-04-15 | 1965-08-31 | Crucible Steel Co America | Titanium-high aluminum alloys |
| US4983357A (en) | 1988-08-16 | 1991-01-08 | Nkk Corporation | Heat-resistant TiAl alloy excellent in room-temperature fracture toughness, high-temperature oxidation resistance and high-temperature strength |
| US5045406A (en) | 1989-06-29 | 1991-09-03 | General Electric Company | Gamma titanium aluminum alloys modified by chromium and silicon and method of preparation |
| US5370839A (en) * | 1991-07-05 | 1994-12-06 | Nippon Steel Corporation | Tial-based intermetallic compound alloys having superplasticity |
| US5226985A (en) * | 1992-01-22 | 1993-07-13 | The United States Of America As Represented By The Secretary Of The Air Force | Method to produce gamma titanium aluminide articles having improved properties |
| US5328530A (en) * | 1993-06-07 | 1994-07-12 | The United States Of America As Represented By The Secretary Of The Air Force | Hot forging of coarse grain alloys |
| USH1659H (en) * | 1995-05-08 | 1997-07-01 | The United States Of America As Represented By The Secretary Of The Air Force | Method for heat treating titanium aluminide alloys |
| US5653828A (en) * | 1995-10-26 | 1997-08-05 | National Research Council Of Canada | Method to procuce fine-grained lamellar microstructures in gamma titanium aluminides |
| DE19756354B4 (de) * | 1997-12-18 | 2007-03-01 | Alstom | Schaufel und Verfahren zur Herstellung der Schaufel |
-
2000
- 2000-10-04 DE DE10049026A patent/DE10049026A1/de not_active Withdrawn
-
2001
- 2001-10-01 DE DE50101467T patent/DE50101467D1/de not_active Expired - Lifetime
- 2001-10-01 EP EP01123551A patent/EP1195445B1/de not_active Expired - Lifetime
- 2001-10-03 US US09/969,026 patent/US6676897B2/en not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4842820A (en) * | 1987-12-28 | 1989-06-27 | General Electric Company | Boron-modified titanium aluminum alloys and method of preparation |
| US4842820B1 (de) * | 1987-12-28 | 1992-05-12 | Gen Electric | |
| EP0455005A1 (de) * | 1990-05-04 | 1991-11-06 | Asea Brown Boveri Ag | Hochtemperaturlegierung für Maschinenbauteile auf der Basis von dotiertem Titanaluminid |
| US5908516A (en) * | 1996-08-28 | 1999-06-01 | Nguyen-Dinh; Xuan | Titanium Aluminide alloys containing Boron, Chromium, Silicon and Tungsten |
| DE19933633A1 (de) * | 1999-07-17 | 2001-01-18 | Abb Alstom Power Ch Ag | Hochtemperaturlegierung |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109280786A (zh) * | 2018-11-22 | 2019-01-29 | 河北四通新型金属材料股份有限公司 | 一种铝钨中间合金及其生产方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| US6676897B2 (en) | 2004-01-13 |
| EP1195445B1 (de) | 2004-02-11 |
| US20030124021A1 (en) | 2003-07-03 |
| DE10049026A1 (de) | 2002-04-11 |
| DE50101467D1 (de) | 2004-03-18 |
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