公开(公告)号：DE69509083D1

公开(公告)日：1999-05-20

申请号：DE69509083

申请日：1995-01-31

Applicant: UNITED TECHNOLOGIES CORP

Inventor： DRAGHI PETER ,  PIETRUSKA NORMAN ,  ARMSTRONG WAYNE

IPC: F01D5/28 ,  B05D7/14 ,  B23K35/02 ,  B23K35/14 ,  B23K35/30 ,  B23P6/04 ,  C23C30/00 ,  C23G5/00 ,  F02C7/00 ,  B23K35/36

Abstract: A repair coating for superalloy articles, such as gas turbine engine components, includes a volatile organic carrier or water-based carrier, a fluxing agent, a thickening agent, balance a filler mix. The filler mix consists of at least two distinct particulate components. The mix includes a first particulate component having a composition which approximates that of the article being repaired. The mix also includes a second particulate component having a composition approximating that of the article and a melting point depressant, such as boron. This melting point depressant is substantially in excess of that in the article and sufficient to provide melting of a portion of the mix at a processing temperature below the melting temperature of the article. The above filler mix is blended with the other constituents to form the repair coating which is applied to an article.

公开(公告)号：SG131840A1

公开(公告)日：2007-05-28

申请号：SG2006063424

申请日：2006-09-13

Applicant: UNITED TECHNOLOGIES CORP

Inventor： PIETRUSKA NORMAN ,  ABRILES BETH KWIATKOWSKI ,  FALKOWSKI JOHN F

Abstract: The present invention is directed to a process for repairing cracks in a turbine engine component. The process comprises the steps of providing a component, preferably formed from a single crystal nickel based material, with at least one crack, applying a repair alloy composition containing a single crystal nickel based alloy, a first nickel based braze alloy and a second nickel based braze alloy to the crack(s), and subjecting the component with the applied repair alloy composition to a thermal cycle to diffuse the repair alloy composition into the crack(s).

公开(公告)号：DE69512069T2

公开(公告)日：2000-01-05

申请号：DE69512069

申请日：1995-06-30

Applicant: UNITED TECHNOLOGIES CORP

Inventor： ROWE JON ,  PIETRUSKA NORMAN ,  PAWLACZYK RICHARD ,  WILCOX GILBERT

IPC: B23K9/00 ,  B23K9/04 ,  B23K10/02 ,  B23K31/00 ,  B23P6/00 ,  C21D1/773 ,  C21D9/00 ,  F01D5/00

Abstract: A method for refurbishing or restoring a turbine vane or other airfoil to restore a desired flow area includes the steps of: providing a plate to be used to restore the flow area on the airfoil; cutting the plate into a desired shape; machining a series of tapers into the cut plate so that the cut plate has a single region with a substantially uniform thickness; overlaying a surface of the airfoil with the pre-cut, pre-shaped plate so that the substantially uniform thickness region is positioned over that part of the airfoil where the flow area is to be restored; and attaching the pre-cut, pre-shaped plate to the airfoil. The refurbishment or restoration method further includes heat treating the pre-cut, pre-shaped plate so that the plate softens and conforms to the shape of the airfoil surface.

公开(公告)号：DE69509083T2

公开(公告)日：1999-11-18

申请号：DE69509083

申请日：1995-01-31

Applicant: UNITED TECHNOLOGIES CORP

Inventor： DRAGHI PETER ,  PIETRUSKA NORMAN ,  ARMSTRONG WAYNE

IPC: F01D5/28 ,  B05D7/14 ,  B23K35/02 ,  B23K35/14 ,  B23K35/30 ,  B23P6/04 ,  C23C30/00 ,  C23G5/00 ,  F02C7/00 ,  B23K35/36

Abstract: A repair coating for superalloy articles, such as gas turbine engine components, includes a volatile organic carrier or water-based carrier, a fluxing agent, a thickening agent, balance a filler mix. The filler mix consists of at least two distinct particulate components. The mix includes a first particulate component having a composition which approximates that of the article being repaired. The mix also includes a second particulate component having a composition approximating that of the article and a melting point depressant, such as boron. This melting point depressant is substantially in excess of that in the article and sufficient to provide melting of a portion of the mix at a processing temperature below the melting temperature of the article. The above filler mix is blended with the other constituents to form the repair coating which is applied to an article.

公开(公告)号：SG53074A1

公开(公告)日：1998-09-28

申请号：SG1997003502

申请日：1997-09-23

Applicant: UNITED TECHNOLOGIES CORP

Inventor： OLSON WALTER E ,  PIETRUSKA NORMAN ,  DRAGHI PETER JON

IPC: C23C24/08 ,  C23C10/04 ,  C23C10/48 ,  C23C26/00 ,  C23C10/30

Abstract: The invention relates to a low activity localised aluminide coating for a metallic article made by positioning a coating material, preferably in the form of a tape, on a portion of the article. The coating material comprises a binder, a halide activator, an aluminum source, and an inert ceramic material. The coating material and the article are heated in an inert atmosphere between about 1800 DEG F (982 DEG C) and about 2050 DEG F (1121 DEG C) for between about four and about seven hours thereby producing a low activity localized aluminide coating having an outward diffusion aluminide coating microstructure characterized by two distinct zones, an inner diffusion zone and an outer zone including between about 20-28 percent, by weight, aluminum.

公开(公告)号：DE60323181D1

公开(公告)日：2008-10-09

申请号：DE60323181

申请日：2003-06-10

Applicant: UNITED TECHNOLOGIES CORP

Inventor： SHAH DILIP M ,  BEALS JAMES T ,  PIETRUSKA NORMAN ,  SZELA EDWARD R

IPC: B23K9/04 ,  B23P6/04 ,  B23K10/02 ,  B23K26/34 ,  B23K37/06 ,  B23P6/00 ,  C23C28/00 ,  F01D5/00 ,  F01D5/18 ,  F01D5/28 ,  F02C7/00

Abstract: The present invention relates to a method for repairing components such as blades used in turbine engines. The method comprises the steps of placing a piece of refractory metal material (16) over an area of the component to be repaired (12) and depositing a repair filler metal material (20) over the piece of refractory material (16) in an amount sufficient to repair the component and welding the repair filler metal material (20) in place. The refractory metal material (16) may be selected from the group consisting of niobium, tantalum, molybdenum, tungsten, a metal having a melting point higher than the melting point of nickel, and alloys thereof and may be uncoated or coated.

公开(公告)号：DE602006002056D1

公开(公告)日：2008-09-18

申请号：DE602006002056

申请日：2006-05-04

Applicant: UNITED TECHNOLOGIES CORP

Inventor： SZELA EDWARD R ,  PIETRUSKA NORMAN

IPC: B23K37/06 ,  B23K1/00 ,  B23K5/18 ,  B23K9/04 ,  B23K20/00 ,  B23K26/34 ,  B23K31/02 ,  F01D5/00

Abstract: A method for forming or remanufacturing a component (22; 200) to have an internal space (50). A refractory metal blocking element is formed, in situ, with at least a portion to be within the internal space (50). A material (90; 232) is added by at least one of welding, laser cladding, and diffusion brazing, the blocking element at least partially blocking entry of the material (90; 232) to the internal space (50). The blocking element is removed.

公开(公告)号：AT406230T

公开(公告)日：2008-09-15

申请号：AT03253664

申请日：2003-06-10

Applicant: UNITED TECHNOLOGIES CORP

Inventor： SHAH DILIP M ,  BEALS JAMES T ,  PIETRUSKA NORMAN ,  SZELA EDWARD R

IPC: B23K9/04 ,  B23P6/04 ,  B23K10/02 ,  B23K26/34 ,  B23K37/06 ,  B23P6/00 ,  C23C28/00 ,  F01D5/00 ,  F01D5/18 ,  F01D5/28 ,  F02C7/00

Abstract: The present invention relates to a method for repairing components such as blades used in turbine engines. The method comprises the steps of placing a piece of refractory metal material (16) over an area of the component to be repaired (12) and depositing a repair filler metal material (20) over the piece of refractory material (16) in an amount sufficient to repair the component and welding the repair filler metal material (20) in place. The refractory metal material (16) may be selected from the group consisting of niobium, tantalum, molybdenum, tungsten, a metal having a melting point higher than the melting point of nickel, and alloys thereof and may be uncoated or coated.

公开(公告)号：AT385448T

公开(公告)日：2008-02-15

申请号：AT02253401

申请日：2002-05-15

Applicant: UNITED TECHNOLOGIES CORP

Inventor： PIETRUSKA NORMAN ,  KLINE DAVID J

IPC: B23K35/30 ,  F02C7/00 ,  B23K1/19 ,  B23K31/00 ,  B23K31/02 ,  B23K35/02 ,  B23K35/14 ,  B23P6/00 ,  C22C19/05 ,  C22F1/00 ,  C22F1/10 ,  F01D5/00

Abstract: The present invention relates to a method for repairing components formed from a single crystal nickel based superalloy. The method comprises the steps of applying a repair alloy to at least one portion of a component formed from the single crystal nickel based superalloy and heating the component with the repair alloy thereon to a temperature that avoids recrystallization and repair zone incipient melting of the single crystal nickel based superalloy. Following the heating step, the component is preferably rapidly cooled and subjected to an aging treatment.

公开(公告)号：CA2588441A1

公开(公告)日：2007-11-24

申请号：CA2588441

申请日：2007-05-10

Applicant: UNITED TECHNOLOGIES CORP

Inventor： KWIATKOWSKI ABRILES BETH ,  PIETRUSKA NORMAN ,  HYDE JOHN H

IPC: C22C19/05 ,  B23P6/04

Abstract: A nickel base repair alloy comprises a blend of about 40 to 60 wt% of a first nickel based braze alloy containing boron, about 15 to 35 wt% of a first nickel based filler material, and the remainder consisting of a blend of a second nickel based filler material and a low melting eutectic braze nickel based alloy.