Alstom Technology Limited

Asea Brown Boveri Inc.

Asea Brown Boveri Ag

Bbc Brown, Boveri & Company, Limited

Alstom (switzerland) Ltd

Alstom

Bbc Brown Boveri Ag

Other

Abb Management Ag

General Electric Technology Gmbh

Ansaldo Energia Switzerland Ag

Suttar, Khan Abdus

Nazmy, Mohamed

Rösler, Joachim

Schnell, Alexander

Mohamed Youssef Nazmy

Markus Staubli

Andreas Kuenzler

Andreas Künzler

Alexander Beeck

Claus Paul Gerdes

Hanspeter Zinn

Robert Singer

Hans Rydstad

Giuseppe Bandiera

Corrado Noseda

Hans Wettstein

Bernhard Weigand

Alexander Schnell

Abdus Suttar Khan

Sorin Keller

Markus Oehl

Gunther Schroder

Robert Baumann

Christoph Toennes

Hans Joachim Schmutzler

Joachim Rösler

Christoph Tonnes

Douglas Arrell

Peter Lawrence

Martin Scheu

David Duhl

Joachim Roesler

Paul Claus Gerdes

Christoph Tönnes

Markus E Staubli

Christoph Töennes

A nickel-base superalloy is characterized by the following chemical composition (details in % by weight): 7.7-8.3 Cr, 5.0-5.25 Co, 2.0-2.1 Mo, 7.8-8.3 W, 5.8-6.1 Ta, 4.9-5.1 Al, 1.0-1.5 Ti, 1.0-2.0 Re, 0.11-0.15 Si, 0.1-0.7 Hf, 0-0.5 Nb, 0.02-0.17 C, 50-400 ppm B, remainder Ni and production-related impurities. The alloy is distinguished by a very high resistance to oxidation, resistance to corrosion and good creep properties at high temperatures.

Nickel-based superalloy

The present invention relates to an oxidation resistant Nickel alloy, characterized in the following chemical composition (in % by weight): 4-7 Cr, 4-5 Si, 0.1-0.2 Y, 0.1-0.2 Mg, 0.1-0.2 Hf, remainder Ni and unavoidable impurities. A preferred embodiment has the following chemical composition (in % by weight): 6 Cr, 4.4 Si, 0.1 Y, 0.15 Mg, 0.1 Hf, remainder Ni and unavoidable impurities. This alloy has an improved oxidation resistance and good creep properties at high temperatures.

Oxidation resistant nickel alloy

A cobalt-base superalloy chemical composition is disclosed which includes, in % by weight: 25-28 W; 3-8 Al; 0.5-6 Ta; 0-3 Mo; 0.01-0.2 C; 0.01-0.1 Hf; 0.001 -0.05 B; 0.01-0.1 Si; and remainder Co and unavoidable impurities. This superalloy can be strengthened by &#x3b3;' dispersions and further dispersion mechanisms. Exemplary compositions can provide good oxidation properties and improved strength values at high temperatures.

High-temperature-resistant cobalt-base superalloy

A nickel-base superalloy with improved degradation behavior consists essentially of the following chemical composition (details in % by weight): 7.7-8.3 Cr, 5.0-5.25 Co, 2.0-2.1 Mo, 7.8-8.3 W, 5.8-6.1 Ta, 4.9-5.1 Al, 1.3-1.4 Ti, 0.1-0.6 Pt, 0.1-0.5 Nb, 0.11-0.15 Si, 0.11-0.15 Hf, 200-750 ppm C, 50-400 ppm B, and the remainder Ni and production-related impurities.

Nickel-base superalloy with improved degradation behavior

An iron-based high-temperature alloy has the following chemical composition (values given being in % by weight): The alloy can be produced at low cost and is distinguished in comparison with the known prior art by outstanding oxidation resistance and good mechanical properties at high temperatures up to 1000&#xb0; C.

High-temperature alloy

An iron-based high-temperature alloy is disclosed which contains the following chemical composition: 20% by weight Cr; 5 to 6% by weight Al; 4% by weight Ta; 4% by weight Mo; 3 to 4% by weight Re; 0.2% by weight Zr; 0.05% by weight B; 0.1% by weight Y; 0.1% by weight Hf; 0 to 0.05% by weight C; and remainder Fe and unavoidable impurities. The alloy can be produced at low cost and can possess outstanding oxidation resistance and good mechanical properties at temperatures up to 1200&#xb0; C.

A creep-resistant steel is characterized by the following chemical composition (values in % by weight): 9.0 to 12.0 Cr, 0.1 to 0.5 Mn, 2.3 to 3 Ni, 1.5 to 2.0 Mo, 0.1 to 0.4 V, 0.01 to 0.06 Nb, 0.08 to 0.16 C, 0.02 to 0.08 N, 0.004 to 0.012 B, 0.001 to 2 Ta, 0.001 to 0.5 La, 0.0001 to 1 Pd, maximum 0.005 P, maximum 0.005 S, maximum 0.05 Si, maximum 0.005 Sn, the remainder iron and unavoidable impurities. This steel is distinguished, as compared with commercial steels, by a greatly improved creep behavior at temperatures of 550&#xb0; C. and above. Moreover, it has an improved resistance to embrittlement during long-term aging and comparatively high toughness. The steel is advantageously used as a material for gas turbine rotors which are exposed to high inlet temperatures in order to increase the efficiency of the gas turbine, but is also used for steam turbines.

Creep-resistant steel

High-temperature materials, based on alloyed intermetallic NiAl, have the following chemical composition (values in % by weight):

High temperature and oxidation resistant material

A steel has the following chemical composition (amounts in % by weight): The steel can be used effectively as a welding additive material and has outstanding properties at very high temperatures, in particular a good creep rupture strength/resistance and a good oxidation resistance.

Welding additive material

A heat treatment method for a nickel-based superalloy, in particular for the production of single-crystal components or directionally solidified components having a chemical composition permits full solution annealing at a temperature T, the method comprising: partially solution annealing in a controlled manner at a temperature T&#x3c;Tin a first step so as to obtain 5-10% of undissolved &#x3b3;' phase in a residual eutectic; and performing a two-stage ageing treatment at respectively lower temperatures in a second step. As a function of the selected level of the partial solution annealing temperature, the proportion of the undissolved &#x3b3;&#x2032; phase can be adjusted in a controlled way, and the tolerance with respect to the disorientation of small-angle grain boundaries/grain boundaries can be increased.

Method for the heat treatment of nickel-based superalloys

A maraging heat-treatment steel includes 8.5 to 9.5% by weight of Cr, 0.15 to 0.25% by weight of Mn, 2 to 2.7% by weight of Ni, 0.5 to 2.5% by weight of Mo, 0.4 to 0.8% by weight of V, 0.001 to 0.15% by weight of Si, 0.06 to 0.1% by weight of C, 0.11 to 0.15% by weight of N, 0.02 to 0.04% by weight of Nb, maximum 0.007% by weight of P, maximum 0.005% by weight of S, maximum 0.01% by weight of Al, iron and standard impurities, wherein a weight ratio of vanadium to nitrogen V/N is in a range between 4.3 and 5.5.

Creep-resistant maraging heat-treatment steel

A ceramic thermal barrier coating () for coating the surface () of a component () of a nickel-based superalloy, and an adhesive coating optionally applied thereon (), preferably a gas turbine component, includes zirconium oxide (ZrO) stabilized by yttrium oxide (YO) and production-related impurities, as well as at least one high-temperature and oxidation resistant intermetallic compound, for example NiAl, YRh, ErIr, the volume fraction of which decreases continuously or in stages as the distance from the surface () of the component ()/the adhesive coating () increases. Advantageously, a less steep stress gradient is produced by gradually varying the composition of the thermal barrier coating (). This leads to an increased expansion tolerance of the thermal barrier coating () and thus, on the one hand, to an increased lifetime under thermal loading (no flaking) and, on the other hand, the possibility of applying thicker thermal barrier coatings (), and therefore of using the coated components () at higher temperatures.

Ceramic thermal barrier coating

A method of depositing a bond coating to a surface of an article includes the steps of depositing an inner layer of the bond coating consisting of &#x3b2;-NiAl comprising Fe, Ga, Mo, B, Hf or Zr or &#x3b3;/&#x3b2;-MCrAlY comprising Fe, Ga, Mo, B, Hf or Zr or &#x3b3;/&#x3b3;'- or &#x3b3;-MCrAlY, and depositing an outer layer of the bond coating, which is more coarse the in the inner layer, consisting of &#x3b2;-NiAl comprising Fe, Ga, Mo, B, Hf or Zr or &#x3b3;/&#x3b2;-MCrAlY comprising Fe, Ga, Mo, B, Hf or Zr or &#x3b3;/&#x3b3;&#x2032;- or &#x3b3;-MCrAlY, wherein said elements Fe, Ga, Mo, B, Hf or Zr above mentioned are present individually or in combination. The coating also includes a noble metal selected from the group consisting of platinum, palladium and rhodium in the inner and outer layer or as a separate layer.

MCrAlY bond coating and method of depositing said MCrAlY bond coating

The invention discloses an intermetallic material consisting of the following composition by weight percent: 10% Al, 22% Cr, 36% Co, 0.2% Y, 0.2% Hf, 2% Ta, 3% Fe, remainder Ni and inevitable impurities. The invention also describes its use as a layer protecting against high temperatures and at locations of thermal turbomachines which are subject to friction or vibration.

Intermetallic material and use of this material

In a heat treatment process for a single-crystal or directionally solidified material body comprising a nickel-based superalloy, the material body is solution-annealed and then at a first temperature &#x3b3;' particles of greater than 1 &#x3bc;m are precipitated in a proportion by volume with V&#x2212;Vof less than 50%, where Vis the total amount of &#x3b3;&#x2032; particles after complete heat treatment and Vis the proportion of the &#x3b3;&#x2032; particles which is greater than 1 &#x3bc;m, and at least at a second temperature '&#x3b3;' particles of less than 1 &#x3bc;m are precipitated. The &#x3b3;&#x2032; particles are preferably precipitated in a size of 2 pin or more with a proportion by volume of 0.25&#x3c;(V&#x2212;V)/(100&#x2212;V)&#x3c;0.55 at the first temperature. The proportion by volume Vof the &#x3b3;&#x2032; particles will be at least 50%.

Heat treatment method for bodies that comprise a nickel based superalloy

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Fislisbach, Switzerland

Mohamed Youssef Nazmy