公开(公告)号：US20190162286A1

公开(公告)日：2019-05-30

申请号：US16184132

申请日：2018-11-08

Applicant: ROLLS-ROYCE plc

Inventor： Daniel CLARK ,  Martin J. RAWSON

IPC: F16H55/06 ,  F16H55/17 ,  B23P15/14

Abstract: A gear comprising: a hub defining an outer surface, the hub comprising a ceramic material; and a first ring defining an inner surface and an outer surface, the inner surface of the first ring being coupled to the outer surface of the hub via a bond, the outer surface of the first ring defining a plurality of gear teeth, and the first ring comprising a metallic material.

公开(公告)号：US20240075587A1

公开(公告)日：2024-03-07

申请号：US18452742

申请日：2023-08-21

Applicant: ROLLS-ROYCE plc

Inventor： Martin J. RAWSON ,  Aleksej MOLOKANOV ,  John HETHERINGTON

IPC: B24C1/10

CPC classification number: B24C1/10

Abstract: A method of manufacturing a component includes supporting the component on a mounting structure. The method further includes impacting first peening bodies on the component to increase sub-surface compressive residual stresses of the component. The first peening bodies impact the component at a first intensity of from about 0.45 mmA to about 0.61 mmA. A first coverage of the component by the first peening bodies is from about 120% to about 205%. The method further includes impacting second peening bodies on the component to increase surface compressive residual stresses of the component. The second peening bodies impact the component at a second intensity of from about 0.20 mmA to about 0.30 mmA. A second coverage of the component by the second peening bodies is from about 120% to about 205%. Each of the first peening bodies and the second peening bodies includes a ceramic material.

公开(公告)号：US20200282448A1

公开(公告)日：2020-09-10

申请号：US16810007

申请日：2020-03-05

Applicant: ROLLS-ROYCE plc

Inventor： Martin J. RAWSON ,  Paul O. HILL ,  Martin TUFFS ,  Carl BOETTCHER

IPC: B21J5/02 ,  F02C6/02

Abstract: A method of manufacturing a component, the method including a maraging steel blank with an initial shape; and performing an incremental cold forming operation on the maraging steel blank, wherein the incremental cold forming operation reduces a thickness of the maraging steel blank.

公开(公告)号：US20190309400A1

公开(公告)日：2019-10-10

申请号：US16297056

申请日：2019-03-08

Applicant: ROLLS-ROYCE plc

Inventor： Harshad K. BHADESHIA ,  Paul O. HILL ,  Martin J. RAWSON ,  Dominik J. DZIEDZIC ,  Zixin HUANG

IPC: C22C38/52 ,  C22C38/44 ,  C22C38/46 ,  C22C38/06 ,  C22C38/48 ,  C22C33/04

Abstract: Maraging steel alloys are disclosed. The alloys are produced by microalloying of the maraging steel alloy to form carbides at prior austenite grain boundaries to increase Zener drag. A particular example alloy consists essentially of, by weight, 7.4 to 8.4 percent nickel, 7.6 to 8.6 percent chromium, 8.4 to 9.4 percent cobalt, 1.8 to 2.2 percent molybdenum, 2 to 2.6 percent tungsten, 1.6 to 2 percent aluminium, 0.05 to 0.08 percent carbon, a carbide former selected from the group consisting of: niobium at a concentration of 0.25 to 0.28 percent; titanium, at a concentration of 0.2 to 0.28 percent; and vanadium, at a concentration of 0.21 to 0.4 percent; the balance being iron and incidental impurities.