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Article and method for forming an article

A product and composition technology, applied in the field of nickel-based superalloys, which can solve the problems of failing to meet strength and life goals, reducing the alloy's solution enhancement potential, etc.

Active Publication Date: 2016-11-16
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Not only is the TCP phase brittle, but its formation reduces the solution strengthening potential of the alloy by removing solute elements from the desired alloy phase and concentrating them in the brittle phase, thereby failing to meet predetermined strength and lifetime targets

Method used

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Examples

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Embodiment Construction

[0088] Articles and methods of forming the articles are provided. Embodiments of the present disclosure have improved weldability, increased resistance to strain age cracking, increased creep life, extended low Cycle fatigue and improved oxidation resistance. Embodiments of the present disclosure enable the manufacture of hot gas path components for gas turbines and gas turbine engines, superalloy compositions that have at least as high temperature beneficial properties as known superalloys and are free of η phase and The content of TCP phase decreases at high working temperature.

[0089] When introducing elements of the various embodiments of the invention, the articles "a", "the" and "said" are intended to mean that there are one or more of the described elements. The terms "comprising", "including" and "having" are intended to be inclusive and mean that there may be other elements other than the listed elements.

[0090] In one embodiment, an article comprises a composi...

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Abstract

An article and a method for forming the article are disclosed. The article comprising a composition, wherein the composition comprises, by weight percent, about 20.0% to about 22.0% chromium (Cr), about 18.0% to about 20.0% cobalt (Co), about 1.0% to about 2.0% tungsten (W), about 3.0% to about 6.0% niobium (Nb), about 0.5% to about 1.5% titanium (Ti), about 2.0% to about 3.0% aluminum (Al), about 0.5% to about 1.5% molybdenum (Mo), about 0.03% to about 0.18% carbon (C), up to about 0.15% tantalum (Ta), up to about 0.20% hafnium (Hf), up to about 0.20% iron (Fe),balance nickel (Ni) and incidental impurities. The amount of Al is present according to the following formula:Al<=(0.5*Ti)+3.75. The composition is weldable, has a microstructure comprising between about 35 vol % and 45 vol % gamma prime (gamma') and is substantially devoid of Eta and reduced content of TCP phases at elevated working temperatures. A method of making an article and a method of operating a gas turbine are also disclosed.

Description

technical field [0001] The present invention relates to nickel-based superalloys, articles formed from nickel-based superalloys, and methods of forming articles. Background technique [0002] Hot gas path components of gas turbines and engines, particularly turbine blades, vanes, nozzles, seals, and stationary shrouds, operate at high temperatures often exceeding 2,000°F. Typically, superalloys such as nickel-based superalloys are used in hot gas channels to withstand high temperatures. However, many currently used nickel-based superalloys have the disadvantage of being difficult to weld. For example, such as GTD-111, INCONEL ® The alloys of 738 and Rene 108 are difficult to weld alloys. "GTD-111" is a registered trademark of General Electric Company. "INCONEL" is a registered trademark for alloys produced by Huntington Alloys Corporation, Huntington, West Virginia. [0003] Furthermore, known alloys that are readily weldable have increased amounts of aluminum. A disa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/05C22C30/00
CPCC22C19/055C22C30/00B22F10/18B22F10/32B22F10/25B22F10/64B22F10/28C22C19/05C22C1/0433C22F1/10Y02P10/25B33Y10/00B33Y80/00B23K26/342B22F3/24B22F2003/248
Inventor 崔岩冯干江S.C.科蒂林加姆M.莱洛克B.L.托利森
Owner GENERAL ELECTRIC CO
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