Patent
Welding of nickel-base superalloys having a nil-ductility range
Russell W. Smashey,Thomas Joseph Kelly,John H. Snyder,Ronald Lee Sheranko +3 more
- 22 Jan 1997
TL;DR: An article made of a nickel-base superalloy having a nilductility range from the solidus temperature of the alloy to about 600° F. is welded, as for example in the weld repair of surface cracks, by removing foreign matter from the area to be welded as discussed by the authors.
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Abstract: An article made of a nickel-base superalloy having a nil-ductility range from the solidus temperature of the alloy to about 600° F. below the solidus temperature is welded, as for example in the weld repair of surface cracks, by removing foreign matter from the area to be welded, first stress relieving the article, adjusting the temperature of the article to a welding temperature of from about 1800° F. to about 2100° F., welding a preselected area in an inert atmosphere at the welding temperature, and second stress relieving the article. Welding is preferably accomplished by striking an arc in the preselected area so as to locally melt the alloy in the preselected area, providing a filler metal having the same composition as the nickel-based superalloy of the article, and feeding the filler metal into the arc so that the filler metal is melted and fused with the article to form a weldment upon solidification.
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Citations
Reduction of the hot cracking sensitivity of CM-247LC superalloy processed by laser cladding using induction preheating
Guillaume Bidron,Anis Doghri,Thierry Malot,Florent Fournier-Dit-Chabert,Marc Thomas,Patrice Peyre +5 more
TL;DR: In this article, a detailed investigation of the effect of cladding parameters on the crack susceptibility was carried out on coupons that received a low pre-heating condition, and attempts were made to reduce crack defects by using an induction preheating, with higher temperatures in the range of 800-1100°C.
79
Patent
Welding superalloy articles
Michael Foster,Kevin Updegrove +1 more
- 21 Feb 2001
TL;DR: In this paper, a process for welding a nickel or cobalt-based superalloy article to minimize cracking by preheating the entire weld area to a maximum ductility temperature range, maintaining such temperature during welding and solidification of the weld, raising the temperature for stress relief of the super-alloy, then cooling at a rate effective to minimize gamma prime precipitation.
69
Patent
Crack repair method
Andreas Bögli,John Fernihough,Oliver Ullmann +2 more
- 08 Nov 2002
TL;DR: In this paper, a method for repairing cracks on a surface of a component such as a gas turbine component is described, which comprises the steps of repairing the cracks by brazing, detecting by any means remaining cracks on the surface or below the surface, which were not properly filled with braze material, and repairing the crack zones with a focussed low-heat input welding method using an appropriate weld filler material.
67
Patent
Superalloy weld composition and repaired turbine engine component
Charles Gitahi Mukira,Melvin Robert Jackson,Aaron Todd Frost,Adrian Maurice Beltran +3 more
- 04 Oct 1999
TL;DR: A solid-solution strengthened superalloy weld composition, including: about 0 to about 10 wt Co; about 18 to about 22 wt Cr; about 0.2 to about 0 0.7 wt Al; about 15 to about 28 wt % of the sum of refractory elements; up to approximately 0.06 wt Zr; up, about 0., 0.015 wt B; and balance Ni.
63
Patent
Welding single crystal articles
Frank Wos,Zengmei Wang Koenigsmann +1 more
- 12 Jul 2004
TL;DR: In this article, a process for crack-free welding a nickel-based single crystal superalloy article containing at least 5 weight % total of Al and Ti is provided, where the filler alloy is a composition of a nickel based single-crystal superalloys.
39
References
Patent
Turbine blade repair
Michael James Badgeworth Manor Fraser
- 19 Mar 1990
TL;DR: In this paper, a method of repairing a turbine blade is described, which includes performing a heating operation on the blade, in which the blade is heated to achieve a predetermined temperature distribution, sensing the temperature of the blade at least at one position by temperature sensing means (57-63), and controlling the application of heat in accordance with the temperature determined by said at least one sensing means and monitoring the temperature at a location adjacent to the blade with a monitoring means.
187
Patent
Interactive laser welding at elevated temperatures of superalloy articles
Frank Goodwater,Huynh Lang,David Kang,Hon Li,James Lizotte,Brian Doyle +5 more
- 31 Aug 1994
TL;DR: In this article, a process for laser welding a superalloy article is described by pre-heating the entire weld area and region adjacent to the weld area of the article to a ductile temperature within the range of 1400-2100 degrees F with an induction heat coil and maintaining such tem-perature during welding and solidification of the weld.
100
Patent
Welding high-strength nickel base superalloys
Richard J Stueber,Thomas Milidantri,Moshen Tadayon +2 more
- 27 Sep 1991
TL;DR: In this paper, a process for welding a gamma-prime precipitation-strengthened nickel base superalloy by heating the weld area and adjacent region to a ductile temperature was described.
94
Patent
Turbine system having more failure resistant rotors and repair welding of low alloy ferrous turbine components by controlled weld build-up
Robert Edward Clark,Dennis Ray Amos +1 more
- 24 Apr 1989
TL;DR: In this paper, a system for repairing worn surfaces of steam turbine components and especially high pressure turbine rotors is described, where a first layer of weld metal is applied on a worn surface of the component, whereby a heat-affected zone is created.
92
Patent
High temperature braze repair of superalloys
Gregor Baladjanian,Robert L. Rothman +1 more
- 31 Jul 1979
TL;DR: In this paper, the melting point of the repair region is raised by diffusing the depressant into the braze material and repair region at second and third elevated temperatures lower than the first elevated temperature to form a repaired superalloy exhibiting highly desirable properties.
74
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