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1.发明公开公开(公告)号：US20240279762A1
公开(公告)日：2024-08-22
申请号：US18561124
申请日：2022-05-10
Applicant: Schaeffler Technologies AG & Co. KG
Inventor： Johannes Moeller , Werner Trojahn , Stefan Valentin , Markus Dinkel
CPC classification number: C21D1/607 , C21D1/20 , C21D9/40 , C21D2211/001 , C21D2211/002 , C21D2211/005 , C21D2211/009
Abstract: A method for producing a rolling bearing component includes forming the rolling bearing component from a 100CrMnSi6-4 or 100Cr6 rolling bearing steel, heating the rolling bearing component, quenching the rolling bearing component, heating the rolling bearing component and holding the rolling bearing component. The rolling bearing component to heated to an austenitizing temperature to form an austenitic microstructure. The rolling bearing component is quenched in a hot salt bath to a first temperature of between 170° C. and 200° C. such that there is a pearlitic or ferritic microstructure in a core region of the rolling bearing component. The rolling bearing component is heated to a second temperature between 220° C. and 280° C. The rolling bearing component is held at the second temperature for a holding time of at least 7 hours such that there is a predominantly bainitic microstructure formed on a surface of the rolling bearing component.
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公开(公告)号：US12055182B2
公开(公告)日：2024-08-06
申请号：US17552528
申请日：2021-12-16
Inventor： Sylvia Campbell , Paulo R. Vieira De Morais
CPC classification number: F16C33/14 , C21D9/40 , C22F1/04 , F16C33/121 , F16C33/125 , B21B2001/383 , F16C2204/20 , F16C2220/44 , F16C2360/22
Abstract: A method of manufacturing a strip for a bearing may comprise roll-bonding a bearing layer comprising a tin-free aluminium alloy directly to a base layer to form a bimetal and heat-treating the bimetal at a temperature below a recrystallization initiation temperature of the aluminium alloy. A strip for a bearing manufactured using the method, and a bearing having a strip manufactured using the method, are also provided.
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公开(公告)号：US20240060531A1
公开(公告)日：2024-02-22
申请号：US18270260
申请日：2021-12-14
Applicant: Schaeffler Technologies AG & Co. KG
Inventor： Werner Trojahn , Markus Dinkel , Johannes Moeller
CPC classification number: F16C19/04 , B21D53/10 , C21D9/40 , C21D1/18 , C21D2211/008 , C21D2211/009 , C21D2211/002
Abstract: A method for producing a rolling bearing component includes providing a rolling bearing component formed from a rolling bearing steel, heating the rolling bearing component to form an austenitic microstructure, and cooling the rolling bearing component in a warm salt bath to a temperature below a martensite start temperature of the rolling bearing steel. The rolling bearing component has a wall thickness or a diameter of at least 85 mm at at least one point and includes a martensitic microstructure in an edge layer region and a microstructure consisting of pearlite or upper bainite in a core region after the cooling. A rolling bearing component produced by the method and a rolling bearing comprising the rolling bearing component are also disclosed.
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公开(公告)号：US11905602B2
公开(公告)日：2024-02-20
申请号：US18106960
申请日：2023-02-07
Applicant: SKF Aerospace France S.A.S
Inventor： Jean-Baptiste Coudert , Alexandre Mondelin
CPC classification number: C23C8/32 , C21D1/74 , C21D9/40 , C22C38/00 , F16C13/02 , F16C19/06 , C21D2211/001
Abstract: A method for reinforcing a steel component, having a carbonitriding step providing a first substep of case-hardening, and a second substep of nitriding, the first and second substeps of case-hardening and of nitriding of the step of carbonitriding the component are performed in one and the same heat treatment cycle.
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公开(公告)号：US20230383788A1
公开(公告)日：2023-11-30
申请号：US18232192
申请日：2023-08-09
Applicant: Aktiebolaget SKF
Inventor： Rudolf Hauleitner , Mohamed Sherif
IPC: F16C33/10 , F16C17/02 , C22C38/00 , C21D9/40 , C21D6/00 , C21D1/773 , C21D1/74 , C21D11/00 , C21D1/613 , C21D1/18
CPC classification number: F16C33/1025 , F16C17/02 , C22C38/001 , C21D9/40 , C21D6/00 , C21D1/773 , C21D1/74 , C21D11/00 , C21D1/613 , C21D1/18 , F16C2204/60 , C21D2201/00 , C21D2211/001 , C21D2241/00
Abstract: A bearing assembly, particularly refrigerant lubricated bearing assembly, having at least an inner ring and an outer ring, which are rotatable to each other. At least one bearing ring is made from a nitrogen-alloyed stainless steel having a nitrogen (N) content of more than 0.6 wt.-%. A method for manufacturing such a bearing ring is also provided.
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Patent Agency Ranking
公开(公告)号：US11668298B2
公开(公告)日：2023-06-06
申请号：US16674709
申请日：2019-11-05
Applicant: Hyundai Motor Company , Kia Motors Corporation
Inventor： Haksoo Kim
IPC: F04C14/18 , B22F5/10 , B22F3/24 , C21D9/40 , C21D6/00 , C22C38/22 , C22C38/04 , C22C38/60 , F16C17/02 , B22F3/10
CPC classification number: F04C14/18 , B22F3/1007 , B22F3/24 , B22F5/106 , C21D6/002 , C21D6/005 , C21D9/40 , C22C38/04 , C22C38/22 , C22C38/60 , F16C17/02 , B22F2003/248 , B22F2301/35 , C21D2211/008 , F16C2204/64 , F16C2204/70
Abstract: A method of manufacturing a slide of a variable oil pump for a vehicle includes preparing a molded body for a slide of a variable oil pump using prealloy powder including, in percent (%) by weight of the entire composition, 0.45 to 0.55% of carbon (C), 2.8 to 3.2% of chromium (Cr), 0.45 to 0.55% of molybdenum (Mo), 0.35 to 0.5% of manganese (Mn), 0.1 to 0.25% of sulfur (S), and the remainder of iron (Fe) and inevitable impurities. A sintered body is prepared by sintering the molded body. The sintered body is slowly cooled such that a temperature of the sintered body reaches a first temperature range and rapidly cooled when the first temperature range is reached.
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公开(公告)号：US20230147672A1
公开(公告)日：2023-05-11
申请号：US17962476
申请日：2022-10-08
Applicant: Aktiebolaget SKF , SKF (China) Co Ltd
Inventor： Feizhou Zhang , Meng Zhang , Ming Li , Yunfeng Song , Ping Huang , Karl Åke Staffan Larsson
CPC classification number: C21D6/008 , C22C38/18 , C22C38/02 , C21D6/005 , C21D6/002 , C21D9/40 , C21D2211/001
Abstract: The invention provides a heat treatment method for a steel product. The steel product includes at least 0.5-0.7% of Si by weight; the method provides the following steps: step 1) putting the steel product under an Austenitizing temperature of 830-890° C. and lasting for a first time to Austenitize the steel product, step 2) immersing the Austenitized steel product in a salt bath at an isothermal temperature of 200-350° C. and lasting for the second time. The method of the invention improves the toughness and elongation of the steel product, keeps the wear resistance of the product, and can be well applied to the fields of thin section ring of bearings and the like. The invention also provides a steel product and a bearing ring.
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公开(公告)号：US20190185956A1
公开(公告)日：2019-06-20
申请号：US16322061
申请日：2016-08-10
Applicant: Härterei Reese Bochum GmbH
Inventor： Gerhard Reese , Thorsten Stadtler
CPC classification number: C21D9/0018 , C21D9/32 , C21D9/40 , C21D9/675 , F27D5/0006 , F27D5/0025
Abstract: The invention relates to a charging apparatus for the dimensionally stable heat treatment of workpieces (1), in particular those of a disk or ring shape, having a charging rack (10) for horizontally mounting the workpiece (1), wherein at least s three screw-type mandrels or ball joint mandrels (2) are arranged on the charging rack (10), the ball joint mandrels (2) having a base plate (3) with a female thread (7), a screw element (4) with a male thread (7) matched to the female thread (7) and a head that has a spherical segment surface, as well as a pressure piece (5) matched precisely to the spherical segment surface of the head and arranged movably thereon.
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9.发明申请公开(公告)号：US20190107152A1
公开(公告)日：2019-04-11
申请号：US16088560
申请日：2017-04-04
Applicant: JTEKT CORPORATION
Inventor： Kensuke SUZUKI , Wataru YOSHIDA , Nicolas Vincent BARBI , Tsuyoshi MIKAMI
CPC classification number: F16C33/64 , C21D1/18 , C21D1/64 , C21D1/667 , C21D6/004 , C21D9/40 , F16C19/364 , F16C33/58 , F16C33/62
Abstract: A bearing ring for a roller bearing includes: an inner layer part that is formed of tempering martensite or sorbite; and a surface layer part that surrounds the entire periphery of the inner layer part, in which Vickers hardness of a surface thereof is larger than that of the inner layer, and which is formed of tempering martensite. A raceway portion of the surface layer part a portion that is in contact with at least one end of the rolling contact surface of the roller in an axial direction, and includes a first raceway portion at which compressive residual stress of the raceway surface is relatively high.
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10.发明申请公开(公告)号：US20190010584A1
公开(公告)日：2019-01-10
申请号：US15642960
申请日：2017-07-06
Applicant: GENERAL ELECTRIC COMPANY
Inventor： Gordon MCCOLVIN , Jean LARAGNE , Giovanni CATALDI
CPC classification number: C22C30/00 , B22D13/04 , C21D6/001 , C21D6/007 , C21D6/02 , C21D9/40 , C22C19/03
Abstract: Nickel-iron-cobalt based alloys are disclosed having sufficient castability for centrifugal casting essentially free from casting defects, cracking, and microstructure variability, and coefficients of thermal expansion up to about 9×10−6/° C. for about 100-400° C. and increasing from about 400-500° C. to up to about 10×10−6/° C., or up to about 6×10−6/° C. between about 100-300° C. and increasing from about 300-500° C. to up to about 10×10−6/° C. Articles are disclosed including unitary cast structures free of internal welds, brazing, and bolting, essentially annular conformations, diameters of at least about 500 mm, cross-sectional wall areas of at least about 2,000 mm2, and compositions including nickel-iron-cobalt based alloys. Methods for forming the articles are disclosed including rotating centrifugal molds with the compositions in molten states, forming the articles in near net shape.
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