Patents Assigned to Howmet Corporation
-
Patent number: 10711617Abstract: A casting method and apparatus are provided for casting a near-net shape article, such as for example a gas turbine engine blade or vane having a variable cross-section along its length. A molten metallic melt is provided in a heated mold having an article-shaped mold cavity with a shape corresponding to that of the article to be cast. The melt-containing mold and mold heating furnace are relatively moved to withdraw the melt-containing mold from the furnace through an active cooling zone where cooling gas is directed against the exterior of the mold to actively extract heat. At least one of the mold withdrawal rate, the cooling gas mass flow rate, and mold temperature are adjusted at the active cooling zone as the melt-containing mold is withdrawn through the active cooling zone to produce an equiaxed grain microstructure along at least a part of the length of the article.Type: GrantFiled: August 22, 2018Date of Patent: July 14, 2020Assignee: HOWMET CORPORATIONInventor: Rajeev Naik
-
Patent number: 10669865Abstract: Method and apparatus are provided for electroplating a surface area of an internal wall defining a cooling cavity present in a gas turbine engine component.Type: GrantFiled: November 1, 2017Date of Patent: June 2, 2020Assignee: HOWMET CORPORATIONInventors: Willard N. Kirkendall, Scott A. Meade, Donald R. Clemens
-
Patent number: 10544690Abstract: Method and apparatus are provided for electroplating a surface area of an internal wall defining a cooling cavity present in a gas turbine engine airfoil component.Type: GrantFiled: November 20, 2017Date of Patent: January 28, 2020Assignee: HOWMET CORPORATIONInventors: Willard N. Kirkendall, Scott A. Meade, Donald R. Clemens
-
Patent number: 10385704Abstract: Method and apparatus are provided for electroplating a surface area of an internal wall defining a cooling cavity present in a gas turbine engine airfoil component.Type: GrantFiled: November 30, 2017Date of Patent: August 20, 2019Assignee: Howmet CorporationInventors: Willard N. Kirkendall, Scott A. Meade, Donald R. Clemens
-
Patent number: 10113225Abstract: A mask is used in aluminizing of superalloy turbine component, such as a turbine blade, where a region exposed to relatively high operating temperature is aluminized to form a diffusion aluminide coating and another region exposed to relatively lower operating temperatures is masked to prevent aluminizing of the masked region while concurrently being enriched in Cr and/or retaining a pre-existing Cr-content from the superalloy chemistry itself or from a previous chromizing operation.Type: GrantFiled: March 12, 2014Date of Patent: October 30, 2018Assignee: Howmet CorporationInventors: Kenneth S. Murphy, William C. Basta, Vincent J. Russo
-
Patent number: 10082032Abstract: A casting method and apparatus are provided for casting a near-net shape article, such as for example a gas turbine engine blade or vane having a variable cross-section along its length. A molten metallic melt is provided in a heated mold having an article-shaped mold cavity with a shape corresponding to that of the article to be cast. The melt-containing mold and mold heating furnace are relatively moved to withdraw the melt-containing mold from the furnace through an active cooling zone where cooling gas is directed against the exterior of the mold to actively extract heat. At least one of the mold withdrawal rate, the cooling gas mass flow rate, and mold temperature are adjusted at the active cooling zone as the melt-containing mold is withdrawn through the active cooling zone to produce an equiaxed grain microstructure along at least a part of the length of the article.Type: GrantFiled: October 17, 2013Date of Patent: September 25, 2018Assignee: Howmet CorporationInventor: Rajeev Naik
-
Patent number: 9840918Abstract: Method and apparatus are provided for electroplating a surface area of an internal wall defining a cooling cavity present in a gas turbine engine airfoil component.Type: GrantFiled: April 14, 2014Date of Patent: December 12, 2017Assignee: Howmet CorporationInventors: Willard N. Kirkendall, Scott A. Meade, Donald R. Clemens
-
Patent number: 9835035Abstract: A method is provided for making a mold for casting advanced turbine airfoils (e.g. gas turbine blade and vane castings) which can include complex internal and external air cooling features to improve efficiency of airfoil cooling during operation in the gas turbine hot gas stream. The method steps involve incorporating at least one fugitive insert in a ceramic material in a manner to form a core and at least a portion of an integral, cooperating mold wall wherein the core defines an internal cooling feature to be imparted to the cast airfoil and the at least portion of the mold wall has an inner surface that defines an external cooling feature to be imparted to the cast airfoil, selectively removing the fugitive insert, and incorporating the core and the at least portion of the integral, cooperating mold wall in a mold for receiving molten metal or alloy cast in the mold.Type: GrantFiled: March 12, 2013Date of Patent: December 5, 2017Assignee: Howmet CorporationInventors: Boyd A. Mueller, Michael A. Pepper, Darren K. Rogers, Gail R. Cole
-
Patent number: 9828863Abstract: Method and apparatus are provided for electroplating a surface area of an internal wall defining a cooling cavity present in a gas turbine engine component.Type: GrantFiled: November 3, 2014Date of Patent: November 28, 2017Assignee: Howmet CorporationInventors: Willard N. Kirkendall, Scott A. Meade, Donald R. Clemens
-
Patent number: 9404372Abstract: A Pt—Al—Hf/Zr aluminide coating that can be used as a bond coat for TBC and improve TBC spallation life in service at elevated temperatures is provided. The aluminide coating can include a metastable ternary or higher X—Pt/Pd—Ni phase where the phase and other elements in the alloy system are present in a NiAl ? phase of the coating. The metastable phase can be present and observable in the as-deposited condition of the bond coating; e.g. in an as-CVD deposited condition of the bond coating.Type: GrantFiled: October 31, 2012Date of Patent: August 2, 2016Assignee: Howmet CorporationInventor: Kenneth S. Murphy
-
Patent number: 9381569Abstract: A method and apparatus for vacuum or air casting a molten superalloy, or other metal or alloy, containing an oxygen-reactive alloying element to form a cast part involves introducing the molten metallic material (melt) into a preheated mold having a melt reservoir, such as for example a mold pour cup, and gating for feeding the melt to one or more mold cavities. An induction coil disposed locally adjacent to the mold pour cup is energized in a manner to locally heat excess melt left in the melt reservoir to maintain it molten as the melt solidifies under vacuum or in air in the mold cavity to avoid shrinkage defects in the cast part.Type: GrantFiled: March 7, 2013Date of Patent: July 5, 2016Assignee: Howmet CorporationInventors: Russell G. Vogt, Christopher R. Hanslits
-
Patent number: 9284846Abstract: A Pt—Al—Hf/Zr aluminide coating that can be used as a bond coat for TBC and improve TBC spallation life in service at elevated temperatures is provided. The aluminide coating can include a metastable ternary or higher X—Pt/Pd—Ni phase where the phase and other elements in the alloy system are present in a NiAl ? phase of the coating. The metastable phase can be present and observable in the as-deposited condition of the bond coating; e.g. in an as-CVD deposited condition of the bond coating.Type: GrantFiled: May 18, 2010Date of Patent: March 15, 2016Assignee: Howmet CorporationInventor: Kenneth S. Murphy
-
Patent number: 9068251Abstract: A nickel-based superalloy is provided. Known nickel-based superalloys for producing components made of stem shaped single crystals do not provide sufficiently for grain boundary strength. The superalloy includes a low molybdenum content and very accurately adjusted values for elements having grain boundary strength and elements that precipitate in grain boundaries.Type: GrantFiled: October 20, 2009Date of Patent: June 30, 2015Assignees: SIEMENS AKTIENGESELLSCHAFT, HOWMET CORPORATIONInventors: Winfried Eβer, Dirk Goldschmidt, Christopher R. Hanslits, Michael Ott, Uwe Paul, Ursula Pickert, Russell G. Vogt
-
Patent number: 8997836Abstract: A multi-wall ceramic core for casting an airfoil with one or more internal cooling passages is made by preforming at least one fugitive core insert to have a joint-forming surface with a male and/or female joint feature and then forming at least one fugitive core insert in-situ adjacent and integrally connected and fused to the at least one preformed core insert at the joint-forming surface to form an interlocked, fused joint to form a composite core insert that includes features to form internal passage surfaces in the core when the composite core insert is removed. Another aspect involves preforming first and second fugitive core inserts to have respective joint-forming surfaces with respective snap-fittable joint features and assembling the first and second fugitive core inserts to form a composite core insert by snap fitting the snap-fittable joint features together to form an interlocked joint.Type: GrantFiled: October 21, 2014Date of Patent: April 7, 2015Assignee: Howmet CorporationInventors: Boyd A. Mueller, Darren K. Rogers, Timothy J. Molamphy
-
Patent number: 8915289Abstract: A multi-wall ceramic core for casting an airfoil with one or more internal cooling passages is made by preforming at least one fugitive core insert to have a joint-forming surface with a male and/or female joint feature and then forming at least one fugitive core insert in-situ adjacent and integrally connected and fused to the at least one preformed core insert at the joint-forming surface to form an interlocked, fused joint to form a composite core insert that includes features to form internal passage surfaces in the core when the composite core insert is removed. Another aspect involves preforming first and second fugitive core inserts to have respective joint-forming surfaces with respective snap-fittable joint features and assembling the first and second fugitive core inserts to form a composite core insert by snap fitting the snap-fittable joint features together to form an interlocked joint.Type: GrantFiled: March 13, 2013Date of Patent: December 23, 2014Assignee: Howmet CorporationInventors: Boyd A. Mueller, Darren K. Rogers, Timothy J. Molamphy
-
Patent number: 8899303Abstract: A multi-wall ceramic core for casting an airfoil with one or more internal cooling passages is made by preforming at least one fugitive core insert, then forming at least one core insert in-situ adjacent and fused to the at least one preformed core insert by introducing fluid fugitive pattern material into a composite core insert mold whereby the fugitive core inserts are integrally connected as a single composite core insert that includes features to form internal passage surfaces in the core when the composite core insert is removed. The composite core insert is placed in a core molding die cavity, and a fluid ceramic material is introduced into the die cavity to form the ceramic core body incorporating the fugitive composite core insert therein.Type: GrantFiled: May 10, 2011Date of Patent: December 2, 2014Assignee: Howmet CorporationInventors: Boyd Mueller, Darren Rogers, Timothy J. Molamphy
-
Patent number: 8893767Abstract: A multi-wall ceramic core for casting an airfoil with one or more internal cooling passages is made by preforming at least one fugitive core insert, then forming at least one core insert in-situ adjacent and fused to the at least one preformed core insert by introducing fluid fugitive pattern material into a composite core insert mold whereby the fugitive core inserts are integrally connected as a single composite core insert that includes features to form internal passage surfaces in the core when the composite core insert is removed. The composite core insert is placed in a core molding die cavity, and a fluid ceramic material is introduced into the die cavity to form the ceramic core body incorporating the fugitive composite core insert therein.Type: GrantFiled: September 19, 2012Date of Patent: November 25, 2014Assignee: Howmet CorporationInventors: Boyd Mueller, Darren Rogers, Timothy J. Molamphy
-
Publication number: 20140321997Abstract: Method and apparatus are provided for electroplating a surface area of an internal wall defining a cooling cavity present in a gas turbine engine airfoil component.Type: ApplicationFiled: April 14, 2014Publication date: October 30, 2014Applicant: Howmet CorporationInventors: Willard N. Kirkendall, Scott A. Meade, Donald R. Clemens
-
Publication number: 20140287143Abstract: A mask is used in aluminizing of superalloy turbine component, such as a turbine blade, where a region exposed to relatively high operating temperature is aluminized to form a diffusion aluminide coating and another region exposed to relatively lower operating temperatures is masked to prevent aluminizing of the masked region while concurrently being enriched in Cr and/or retaining a pre-existing Cr-content from the superalloy chemistry itself or from a previous chromizing operation.Type: ApplicationFiled: March 12, 2014Publication date: September 25, 2014Applicant: Howmet CorporationInventors: Kenneth S. Murphy, William C. Basta, Vincent J. Russo
-
Publication number: 20140271129Abstract: A method is provided for making a mold for casting advanced turbine airfoils (e.g. gas turbine blade and vane castings) which can include complex internal and external air cooling features to improve efficiency of airfoil cooling during operation in the gas turbine hot gas stream. The method steps involve incorporating at least one fugitive insert in a ceramic material in a manner to form a core and at least a portion of an integral, cooperating mold wall wherein the core defines an internal cooling feature to be imparted to the cast airfoil and the at least portion of the mold wall has an inner surface that defines an external cooling feature to be imparted to the cast airfoil, selectively removing the fugitive insert, and incorporating the core and the at least portion of the integral, cooperating mold wall in a mold for receiving molten metal or alloy cast in the mold.Type: ApplicationFiled: March 12, 2013Publication date: September 18, 2014Applicant: Howmet CorporationInventors: Boyd A. Mueller, Michael A. Pepper, Daren K. Rogers, Gail R. Cole