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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
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.
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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
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.
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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.
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