公开(公告)号：SG107654A1

公开(公告)日：2004-12-29

申请号：SG200302765

申请日：2003-05-23

Applicant: UNITED TECHNOLOGIES CORP

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

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

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：SG104998A1

公开(公告)日：2004-07-30

申请号：SG200301110

申请日：2003-03-04

Applicant: UNITED TECHNOLOGIES CORP

Inventor： SUDHANGSHU BOSE ,  ALAN D CETEL ,  PETER J DRAGHI ,  NORMAN PIETRUSKA

IPC: F01D5/14 ,  B23P6/00 ,  C23C10/02 ,  C23G1/20 ,  F01D5/28 ,  F01D25/00 ,  F02C7/00 ,  B23P15/00

Abstract: The present invention relates to a method for repairing turbine engine components, such as vanes and blades, which have airfoils. The method broadly comprises removing oxidation debris from portions of the component by blending areas exhibiting thermal barrier coating spall and/or oxidation damage, removing a ceramic insulating layer from the component, and blending surfaces of the component where nicks, dents, and/or cracks are located. If the component has a depleted aluminum zone, the depleted zone is either removed or replenished. Further, a tip portion of the component, if damaged, is restored and tip abrasives are applied to restore the component's cutting ability. Thereafter, a ceramic coating is applied to the component.

公开(公告)号：SG99968A1

公开(公告)日：2003-11-27

申请号：SG200201307

申请日：2002-03-07

Applicant: UNITED TECHNOLOGIES CORP

Inventor： NORMAN PIETRUSKA ,  DAVID J KLINE

IPC: F02C7/00 ,  B23K1/19 ,  B23K31/00 ,  B23K31/02 ,  B23K35/02 ,  B23K35/14 ,  B23K35/30 ,  B23P6/00 ,  C22C19/05 ,  C22F1/00 ,  C22F1/10 ,  F01D5/00 ,  B23P6/04 ,  B23K1/008 ,  B22F5/04

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.