公开(公告)号：US20150225828A1

公开(公告)日：2015-08-13

申请号：US14614732

申请日：2015-02-05

Applicant: ROLLS-ROYCE PLC

Inventor： Neil John D'SOUZA ,  Kevin GOODWIN ,  Martin Richard PERRY

IPC: C22F1/10 ,  C22C19/05 ,  C22F1/00 ,  C22F1/02 ,  C23C8/10 ,  C23C8/80

CPC classification number: C22F1/10 ,  C22C19/057 ,  C22F1/002 ,  C22F1/008 ,  C22F1/02 ,  C23C8/10 ,  C23C8/80

Abstract: Producing a Ni superalloy component in which the superalloy has a γ phase matrix containing intermetallic γ′ precipitates. Providing a Ni superalloy casting of the component; solutioning the component by heat treating the casting under vacuum and/or in an inert atmosphere at a temperature above the γ′ solvus to homogenise the γ phase; quenching and ageing the solutioned component to grow intermetallic γ′ precipitates in the homogenised γ phase. Before the solutioning step: heat treating the casting to produce a thermally grown oxide on the surface, oxide adherent to supress volatilisation of Ni from the surface of the casting during the solutioning heat treatment. Performing the solutioning step under a Ni vapour pressure which is sufficient to supress volatilisation of Ni from the surface of the casting during the solutioning heat treatment. During the solutioning heat treatment the component is encapsulated in a container protecting the casting from Si-doped contaminants.

Abstract translation: 生产Ni超合金组分，其中超合金具有含有金属间γ'析出物的γ相基体。 提供组件的Ni超合金铸件; 通过在真空和/或在惰性气氛中在高于γ'solvus的温度下热处理铸件来使组分溶解以均化γ相; 淬火和老化溶液中的组分以在匀质γ相中生长金属间γ'析出物。 在解决步骤之前：对铸件进行热处理以在表面上产生热生长的氧化物，氧化物粘附以在溶液热处理期间从铸件的表面抑制Ni的挥发。 在Ni蒸汽压力下进行溶解步骤，其足以抵抗在溶液热处理期间来自铸件表面的Ni的挥发。 在固溶热处理期间，将组分封装在保护铸件免受Si掺杂污染物的容器中。