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公开(公告)号：US20190255617A1
公开(公告)日：2019-08-22
申请号：US16271202
申请日：2019-02-08
Applicant: ROLLS-ROYCE plc
Inventor： Yogiraj PARDHI
Abstract: A method of manufacture of an article or component comprising: providing an intermediate article or component comprising, or consisting essentially of, a precipitation strengthened alloy; and treating the intermediate article or component in accordance with a predetermined heat treatment schedule comprising: a solution treatment step (2), wherein the intermediate article is held at a solution temperature for a first predetermined period of time, the solution temperature being above a γ′ solvus temperature (7) and below a solidus temperature (6) for the precipitation strengthened alloy; and a first cooling step (3), wherein the intermediate article is cooled at a first cooling rate of up to 20° C. per minute from the solution temperature to an aging temperature, the aging temperature being below the γ′ solvus temperature (7) for the precipitation strengthened alloy.
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公开(公告)号：US20180361478A1
公开(公告)日：2018-12-20
申请号：US16008312
申请日：2018-06-14
Applicant: ROLLS-ROYCE plc
Inventor： Yogiraj PARDHI
Abstract: The present disclosure relates to a method for processing a component formed by an ALM method using a γ′-strengthened superalloy having a γ′ solvus temperature. The processing method comprises heating the component to a treatment temperature at or above the γ′ solvus temperature at a rate equal to or greater than 50 ° C./min and then cooling the component at a rate of greater than 60° C./min.
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Patent Agency Ranking
公开(公告)号：US20200149135A1
公开(公告)日：2020-05-14
申请号：US16671877
申请日：2019-11-01
Applicant: ROLLS-ROYCE plc
Inventor： Yogiraj PARDHI
Abstract: The novel nickel-base superalloy useful in an additive manufacturing process or a powder-based manufacturing process comprises the following composition in wt %: Crabout 8.0-about 12.0, Coabout 9.0-about 11.0, Moabout 0.4-about 0.6, Wabout 9.0-about 10.0, Taabout 0.1-about 3.5, Alabout 4.4-about 5.6, Tiabout 0.1-about 1.0, Hfabout 0.3-about 0.9, Cabout 0.01-about 0.06, Babout 0.005-about 0.010, Zr0-about 0.005, Nbabout 0.1-about 0.6, Mn0-about 0.05, S0-about 0.003, the balance nickel and incidental elements and unavoidable impurities, in which the total content of Al, Ta and Ti does not exceed 9.0 wt % and in which the total content of Nb and Ta does not exceed 2.4 at %.
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公开(公告)号：US20180361475A1
公开(公告)日：2018-12-20
申请号：US15981280
申请日：2018-05-16
Applicant: ROLLS-ROYCE plc
Inventor： Yogiraj PARDHI
Abstract: The present disclosure relates to a method of heat treating a component (e.g. a combustor tile) which may be formed of a first material e.g. a nickel superalloy. The component may be formed using an ALM method. The method comprises enclosing at least part of the component in a foil envelope which may be formed of a second material wherein the second material (e.g. stainless steel) is more susceptible to reactive oxidation than the first material. Next the envelope is purged with an inert gas (e.g. argon) and the envelope is sealed. The component is then heated e.g. using hot isostatic pressing.
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公开(公告)号：US20190240783A1
公开(公告)日：2019-08-08
申请号：US16248909
申请日：2019-01-16
Applicant: ROLLS-ROYCE plc
Inventor： Yogiraj PARDHI
IPC: B23K26/342 , B33Y10/00 , B33Y40/00 , B33Y80/00 , B23K26/00 , B23K26/0622 , B23K26/06 , B23K26/073 , B23K26/14
CPC classification number: B23K26/342 , B22F2003/247 , B23K26/0093 , B23K26/0622 , B23K26/0626 , B23K26/073 , B23K26/1464 , B23K2101/001 , B33Y10/00 , B33Y40/00 , B33Y80/00
Abstract: There is disclosed a method of manufacturing a component. The method comprises generating, by additive manufacture, an intermediate structure comprising a core corresponding to the component, and one or more excess portions to be removed and comprises machining the intermediate structure to remove the excess portions. The core is generated by a first additive manufacturing procedure and the one or more excess portions are generated by a second additive manufacturing procedure. The second additive manufacturing procedure differs from the first additive manufacture so that the excess portions are fused at a higher rate than the core.
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公开(公告)号：US20180221955A1
公开(公告)日：2018-08-09
申请号：US15889384
申请日：2018-02-06
Applicant: ROLLS-ROYCE plc
Inventor： Yogiraj PARDHI
CPC classification number: B22F3/24 , B22F3/1055 , B22F3/15 , B22F5/009 , B22F2003/247 , B22F2003/248 , B22F2998/10 , B33Y10/00 , B33Y40/00 , B33Y70/00 , B33Y80/00 , C22C1/0433 , C22C19/03 , C22F1/10 , Y02P10/295
Abstract: The present invention provides a processing method for processing a component formed by an ALM method using a γ′-strengthened superalloy having a γ′ solvus temperature. The processing method comprises: 1) surface finishing of the component; 2) hot isostatic pressing of the component at a temperature below the γ′ solvus temperature; 3) solution heat treating the component at a temperature at or above the γ′ solvus temperature but below the solidus temperature; 4) primary aging of the component at a primary aging temperature for a first aging time; and 5) secondary aging of the component at a secondary aging temperature for a second aging time.
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公开(公告)号：US20180073106A1
公开(公告)日：2018-03-15
申请号：US15696516
申请日：2017-09-06
Applicant: ROLLS-ROYCE plc
Inventor： Mark C. HARDY , Grant J. GIBSON , Gavin J. BAXTER , Yogiraj PARDHI
Abstract: The novel nickel-base superalloy useful in an additive manufacturing process or a powder-based manufacturing process includes the following composition in wt %: Cr 8.0-8.5; Co 9.0-9.5; Mo 0.4-0.6; W 9.3-9.7; Ta 2.9-3.6; Al 4.9-5.6; Ti 0.2-1.0; Hf 0-0.05; C 0.005-0.03; B 0.005-0.02; Zr 0.005-0.1; Nb 0.2-1; Mn 0-0.6; and S 0-0.002 (≦20 ppm); the balance nickel and incidental elements and unavoidable impurities.
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