AT163612B - Austenitic chrome-nickel steel alloys for objects that must have high creep strength at temperatures of 600 ° C or above - Google Patents
Austenitic chrome-nickel steel alloys for objects that must have high creep strength at temperatures of 600 ° C or aboveInfo
- Publication number
- AT163612B AT163612B AT163612DA AT163612B AT 163612 B AT163612 B AT 163612B AT 163612D A AT163612D A AT 163612DA AT 163612 B AT163612 B AT 163612B
- Authority
- AT
- Austria
- Prior art keywords
- temperatures
- steel alloys
- nickel steel
- objects
- creep strength
- Prior art date
Links
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 title claims description 9
- 229910000851 Alloy steel Inorganic materials 0.000 title claims description 7
- 229910052759 nickel Inorganic materials 0.000 title claims description 5
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 claims description 6
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 5
- 229910052804 chromium Inorganic materials 0.000 claims description 5
- 239000011651 chromium Substances 0.000 claims description 5
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 5
- 229910052721 tungsten Inorganic materials 0.000 claims description 5
- 239000010937 tungsten Substances 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 229910052720 vanadium Inorganic materials 0.000 claims description 4
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims description 2
- RHDUVDHGVHBHCL-UHFFFAOYSA-N niobium tantalum Chemical compound [Nb].[Ta] RHDUVDHGVHBHCL-UHFFFAOYSA-N 0.000 claims description 2
- 229910045601 alloy Inorganic materials 0.000 description 5
- 239000000956 alloy Substances 0.000 description 5
- 229910052758 niobium Inorganic materials 0.000 description 4
- 239000010955 niobium Substances 0.000 description 4
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 4
- 229910052715 tantalum Inorganic materials 0.000 description 4
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 4
- 238000005275 alloying Methods 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
Landscapes
- Turbine Rotor Nozzle Sealing (AREA)
Description
<Desc/Clms Page number 1>
Austenitische Chrom-Nickel-Stahllegierungen für Gegenstände, die hohe Dauerstandfestig- keit bei Temperaturen von 6000 C oder darüber besitzen müssen
Für eine Reihe von Verwendungszwecken, beispielsweise für Laufräder und Schaufeln von Gasturbinen, werden Stähle gebraucht, die bei Temperaturen von 600 und 700 C, zum Teil auch darüber, hohe Dauerstandfestigkeiten aufweisen.
Für solche Zwecke wurden zunächst ChromNickel-Stahllegierungen verwendet, die solche Legierungsgehalte besitzen, dass ihr Gefüge austenitisch wird.
Es ist auch bereits vorgeschlagen worden, die Dauerstandfestigkeit dieser Legierungen durch einen Zusatz weiterer Legierungselemente zu erhöhen. Beispielsweise wurde zu diesem Zwecke Chrom-Nickel-Stahllegierungen mit etwa 15 bis 25% Chrom und 15-30% Nickel ein Zusatz von Tantal oder Niob oder Tantal und Niob oder von Titan oder auch von Molybdän oder Wolfram gegeben, mit denen bestenfalls bei den für Gasturbinen in Betracht kommenden Temperaturen eine Dauerstandfestigkeit vor 11 bis 12 kgNmm2 erreicht werden konnte.
Durch weitere Forschungen wurde nun festgestellt, dass ein besonderer Erfolg in dieser Hinsicht dann erreicht wird, wenn zu austenitischen Chrom-Nickel-Stahllegierungen Wolfram, Vanadin und Tantal-Niob gemeinsam zugesetzt werden, u. zw. liegen die einzelnen Bestandteile in folgenden Grenzen :
Bis zu 0, 25% Kohlenstoff 12-20% Chrom, 10-16% Nickel, 0, 5-3% Silizium, bis zu 3% Mangan, 1-3% Wolfram, 0, 3-1% Vanadin, 0, 5-1, 5% Niob und 0, 5-1, 5% Tantal.
Besonders bewährt sich eine Legierung mit 0, 15% Kohlenstoff, 16, 55% Chrom, 13, 43%
EMI1.1
Dauerstandfestigkeit von 36 kg/mm2 und bei 7000 C eine solche von 15 kg/mm2.
Der Vorteil dieser Legierungszusammenstellung liegt vor allem darin, dass sich mit möglichst geringstem Legierungsaufwand so hohe Werte der Dauerstandfestigkeit erzielen lassen. Legierungen gleicher Dauerstandfestigkeit benötigten bisher höhere Gehalte an Sparstoffen.
PATENTANSPRÜCHE :
1. Austenitische Chrom-Nickel-Stahllegierungen für Gegenstände, die hohe Dauerstandfestigkeit bei Temperaturen von 6000 C oder darüber besitzen müssen, dadurch gekennzeichnet, dass sie bei einem Gehalt von bis zu 0, 25% Kohlenstoff, 12-20% Chrom, 10-16% Nickel, 0, 5-3% Silizium und bis zu 3% Mangan einen gemeinsamen Zusatz von 1-3% Wolfram, 0, 3-1% Vanadin, 0, 5-1, 5% Niob und 0, 5-1, 5% Tantal enthalten.
**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.
<Desc / Clms Page number 1>
Austenitic chromium-nickel steel alloys for objects that must have high fatigue strength at temperatures of 6000 C or above
For a number of purposes, for example for impellers and blades of gas turbines, steels are used that have high fatigue strengths at temperatures of 600 and 700 C, and sometimes even above.
For such purposes, chromium-nickel steel alloys were initially used which have such alloy contents that their structure becomes austenitic.
It has also already been proposed to increase the fatigue strength of these alloys by adding further alloying elements. For example, for this purpose chromium-nickel steel alloys with about 15 to 25% chromium and 15-30% nickel were added tantalum or niobium or tantalum and niobium or titanium or molybdenum or tungsten, with which at best for the Gas turbines under consideration at temperatures a fatigue strength of 11 to 12 kgNmm2 could be achieved.
Through further research it has now been established that a particular success in this regard is achieved when tungsten, vanadium and tantalum-niobium are added together to austenitic chromium-nickel steel alloys, and the like. The individual components lie within the following limits:
Up to 0.25% carbon, 12-20% chromium, 10-16% nickel, 0.5-3% silicon, up to 3% manganese, 1-3% tungsten, 0.3-1% vanadium, 0.5 -1.5% niobium and 0.5-1.5% tantalum.
An alloy with 0.15% carbon, 16.55% chromium, 13.43%
EMI1.1
Endurance strength of 36 kg / mm2 and at 7000 C one of 15 kg / mm2.
The main advantage of this alloy composition is that such high creep strength values can be achieved with as little alloying as possible. Alloys with the same fatigue strength previously required higher levels of savings.
PATENT CLAIMS:
1. Austenitic chromium-nickel steel alloys for objects that must have high fatigue strength at temperatures of 6000 C or above, characterized in that they have a content of up to 0.25% carbon, 12-20% chromium, 10-16 % Nickel, 0.5-3% silicon and up to 3% manganese a combined addition of 1-3% tungsten, 0.3-1% vanadium, 0.5-1.5% niobium and 0.5-1, Contains 5% tantalum.
** WARNING ** End of DESC field may overlap beginning of CLMS **.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT163612T | 1946-11-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AT163612B true AT163612B (en) | 1949-07-25 |
Family
ID=3652491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AT163612D AT163612B (en) | 1946-11-04 | 1946-11-04 | Austenitic chrome-nickel steel alloys for objects that must have high creep strength at temperatures of 600 ° C or above |
Country Status (1)
| Country | Link |
|---|---|
| AT (1) | AT163612B (en) |
-
1946
- 1946-11-04 AT AT163612D patent/AT163612B/en active
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