公开(公告)号：US20180050392A1

公开(公告)日：2018-02-22

申请号：US15669343

申请日：2017-08-04

Applicant: ROLLS-ROYCE plc

Inventor： Julian C. MASON-FLUCKE ,  Simon L. JONES

IPC: B22F3/105 ,  F01D5/14 ,  B22F3/10 ,  B22F7/06 ,  B22F5/00 ,  B33Y10/00 ,  B33Y80/00

CPC classification number: B22F3/1055 ,  B22F3/1017 ,  B22F5/009 ,  B22F5/10 ,  B22F7/06 ,  B22F2998/10 ,  B33Y10/00 ,  B33Y80/00 ,  F01D5/147 ,  F01D11/125 ,  F05D2230/22 ,  F05D2230/31 ,  F05D2240/11 ,  Y02P10/295 ,  B22F2003/248

Abstract: The present invention provides a method of manufacturing an abradable section to be formed on the interior of the casing of a gas turbine engine. The abradable section is formed by an additive manufacturing process to be of a lower density than the surrounding portions of the casing, but integrally formed with those portions. The abradable section thus formed can result in reduced blade fin tip wear, and may also have an improved performance. It may also have lower manufacturing costs. Formation of cooling passages in the abradable section is also easier and a wider range of designs of cooling passages can be provided. A gas turbine engine included such a casing is also provided.