公开(公告)号：US20170173678A1

公开(公告)日：2017-06-22

申请号：US15369948

申请日：2016-12-06

Applicant: General Electric Company

Inventor： Yingna WU ,  Huiyu XU ,  Bin WEI ,  Zhiwei WU

IPC: B22D15/00 ,  B22D29/00 ,  B22C9/04 ,  B22C1/02 ,  B22C9/10 ,  B22C9/22

CPC classification number: B22D15/00 ,  B22C1/02 ,  B22C9/04 ,  B22C9/108 ,  B22C9/22 ,  B22C9/24 ,  B22D19/0072 ,  B22D29/00

Abstract: The present invention discloses a mold core assembly. The mold core assembly includes at least one core. The core comprises a main body member and a high temperature-resistant material with a melting point over 1500° C., the length-diameter ratio of the main body member is greater than 50, and the main body member includes a high melting point metal with a melting point over 1500° C. The mold core assembly also includes a shell mold, wherein the shell mold encloses the core to form a cavity between the shell mold and the core, so as to accommodate a molten casting metal. The present invention further discloses an investment casting method.

公开(公告)号：US20210115571A1

公开(公告)日：2021-04-22

申请号：US16606545

申请日：2017-04-18

Applicant: General Electric Company

Inventor： Yibo GAO ,  Hong ZHOU ,  Liming ZHANG ,  Yong LIU ,  Yingna WU ,  Jianping WU

IPC: C23G5/00 ,  B08B3/08 ,  B08B7/00 ,  B08B7/04 ,  B08B3/12

Abstract: A method for removing oxide materials from a crack of a metallic workpiece comprises: infiltrating an alkali solution into the crack in a pressurized atmosphere or an ultrasonic environment; applying an energy to the crack to react the oxide materials with the alkali solution and form a resultant material; and rinsing the resultant material with an acid solution to remove the resultant material from the crack. The method is easier to penetrate into the inside of the cracks, in particular suitable for cleaning narrow and deep cracks.

公开(公告)号：US20170370839A1

公开(公告)日：2017-12-28

申请号：US15525664

申请日：2015-12-14

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Liming ZHANG, II ,  Yingna WU ,  Yibo GAO ,  Robert Trent HULLENDER

IPC: G01N21/64 ,  G01N21/71 ,  C23C10/60 ,  C21D10/00 ,  G01N21/65 ,  B23P6/00

CPC classification number: G01N21/6402 ,  B23K26/03 ,  B23K26/0622 ,  B23K26/0861 ,  B23K26/361 ,  B23K26/40 ,  B23K2101/001 ,  B23K2103/10 ,  B23K2103/26 ,  B23K2103/50 ,  B23P6/002 ,  C21D10/00 ,  C23C10/60 ,  F01D5/005 ,  F01D5/288 ,  F05D2230/80 ,  F05D2230/90 ,  F05D2270/804 ,  G01N21/65 ,  G01N21/718

Abstract: A component treatment processes and treated gas turbine components are disclosed. The gas turbine treatment process includes laser-removing coating from a substrate of a turbine component to form laser-induced plasma, spectroscopically analyzing the laser-induced plasma, and discontinuing the laser-removing in response to the spectroscopic analyzing. The treated gas turbine component includes a laser-affected surface, the laser-affected surface having one or both of modified dimensions and modified microstructure due to being exposed to the laser-removing of the coating. The laser-affected surface has a depth corresponding to the laser-removing being discontinued based upon the spectroscopic analyzing of the laser-induced plasma formed from the laser-removing.

公开(公告)号：US20170121829A1

公开(公告)日：2017-05-04

申请号：US15333872

申请日：2016-10-25

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Youhao YANG ,  Liming ZHANG ,  Yingna WU ,  Lawrence James WHIMS ,  Hong ZHOU ,  Hui ZHU ,  Chuan LIN

IPC: C23G1/02

CPC classification number: C23G1/02 ,  C23G5/00

Abstract: A method for removing oxide from a metallic substrate is described. The method includes providing a stream of boron trifluoride; heating the metallic substrate at a first temperature; and heating the metallic substrate at a second temperature different from the first temperature. An associated apparatus is also described.