公开(公告)号：DE69933427T2

公开(公告)日：2007-08-16

申请号：DE69933427

申请日：1999-12-20

Applicant: UNITED TECHNOLOGIES CORP

Inventor： MARCIN JOHN J ,  MURRAY STEPHEN D ,  SHEFFLER KEITH D

IPC: C23G1/20 ,  F02C7/00 ,  F01D5/00 ,  F01D25/00

Abstract: The invention relates to a process for removing ceramic thermal barrier layers from gas turbine engine hardware. A combination of chemical and mechanical steps are used to remove the thermal barrier coating from the substrate without removing the bond coat from the substrate. In particular the process includes a caustic solution treatment in an autoclave under controlled conditions followed by a mechanical abrasion process which leaves the bond coat on the substrate in condition to receive a repair ceramic thermal barrier coating.

公开(公告)号：DE69933427D1

公开(公告)日：2006-11-16

申请号：DE69933427

申请日：1999-12-20

Applicant: UNITED TECHNOLOGIES CORP

Inventor： MARCIN JOHN J ,  MURRAY STEPHEN D ,  SHEFFLER KEITH D

IPC: C23G1/20 ,  F02C7/00 ,  F01D5/00 ,  F01D25/00

Abstract: The invention relates to a process for removing ceramic thermal barrier layers from gas turbine engine hardware. A combination of chemical and mechanical steps are used to remove the thermal barrier coating from the substrate without removing the bond coat from the substrate. In particular the process includes a caustic solution treatment in an autoclave under controlled conditions followed by a mechanical abrasion process which leaves the bond coat on the substrate in condition to receive a repair ceramic thermal barrier coating.

公开(公告)号：EP2931458A4

公开(公告)日：2016-07-27

申请号：EP13862454

申请日：2013-12-13

Applicant: UNITED TECHNOLOGIES CORP

Inventor： BULLIED STEVEN J ,  SHAH DILIP M ,  CETEL ALAN D ,  MARCIN JOHN J

IPC: B22D19/16

CPC classification number: B22D19/16 ,  B22D27/045 ,  F01D5/147 ,  F05D2230/211

Abstract: An alloy part is cast in a mold (280) having a part forming cavity (292, 294, 296). The method comprises pouring a first alloy into the mold. The pouring causes: a surface (550) of the first alloy in the part forming cavity to raise relative to the part forming cavity; a branch flow of the poured first alloy to pass upwardly through a first portion (304) of a passageway; and the branch flow to pass downwardly through a second portion (310), of the passageway; solidifying some of the first alloy in the passageway to block the passageway while at least some of the first alloy in the part forming cavity remains molten. A second alloy is poured into the mold atop the first alloy and solidified.