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公开(公告)号：US20220381335A1
公开(公告)日：2022-12-01
申请号：US17657488
申请日：2022-03-31
发明人： Koki HAYASHI , Hiroaki HATSUYAMA
摘要： A power transmission device and a method of manufacturing the same capable of shortening a shaft length and improving mountability are provided. A power transmission device according to the present disclosure includes a planetary carrier configured to support a pinion shaft pivotally supporting a pinion gear, rotatably support the pinion gear, and cause the pinion gear to revolve by rotation of the planetary carrier and a planetary carrier plate fixed fo face the planetary carrier on a side where the pinion gear is positioned, and including dog teeth integrally formed with the planetary carrier plate.
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公开(公告)号：US11332817B2
公开(公告)日：2022-05-17
申请号：US17046064
申请日：2019-05-10
申请人： KOMATSU LTD.
IPC分类号： C22C38/00 , C23C8/22 , C21D1/32 , C21D9/32 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/44 , C22C38/46 , C22C38/48 , C22C38/50 , C22C38/54 , C23C8/80
摘要： A machine component includes a core made up of a steel for machine structural use, and a medium carbon-containing layer and a high carbon-containing layer formed of the steel for machine structural use, the medium carbon-containing layer covering the core, the high carbon-containing layer covering the medium carbon-containing layer and having a carbon concentration of 0.8-1.5%. The high carbon-containing layer is made up of a martensitic structure having carbides dispersed therein and a residual austenitic structure, wherein spheroidized carbides with an aspect ratio of 1.5 or less constitute 90% or more of a total number of the carbides, and the number of spheroidized carbides on prior austenite grain boundaries is 40% or less of the total number of the carbides.
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公开(公告)号：US11332799B2
公开(公告)日：2022-05-17
申请号：US16330857
申请日：2017-09-08
IPC分类号： C21D1/06 , C21D9/32 , C22C38/00 , C21D9/00 , C21D8/06 , C22C38/02 , C22C38/04 , C22C38/22 , C22C38/28 , C22C38/32 , C22C38/26 , C22C38/60 , C22C38/44 , C22C38/24 , C22C38/54 , C22C38/50 , C22C38/06 , C22C38/20
摘要： Disclosed are a case hardened steel which is suitable as a material for producing mechanical structural parts having high rotating bending fatigue strength and impact fatigue strength at a relatively low cost, and a method of producing the same. The case hardening steel has a chemical composition containing, by mass %, C, Si, Mn, P, S, Cr, Mo, B, Ti, N, and O within a range satisfying a predetermined relationship, and Al in at least a predetermined amount in relation to the B, N, and Ti contents, with the balance being Fe and inevitable impurities, wherein √I≤80 is satisfied, where I represents an area in μm2 of an oxide-based inclusion located at the center of a fish-eye on a fracture surface of the case hardening steel after being subjected to carburizing-quenching and tempering and subsequently to a rotating bending fatigue test.
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公开(公告)号：US20220033923A1
公开(公告)日：2022-02-03
申请号：US17280355
申请日：2019-09-24
摘要： To reduce the roughening of a surface of a workpiece whose hardness is increased by heat treatment. In a workpiece such as a guide plate (11), not a surface (11a1) of a groove (11a) that is a desired part for hardening (hardening target position) but a surface (11a2) opposite the surface (11a1) is heat-treated as a surface to be heated that is to be directly heated by an induction heating device. This can inhibit the surface (11a1) of the hardening target position from being roughened by the heat treatment and becoming lower in surface precision than before the heat treatment. Further, according to the present invention, the use of the induction heating device makes it possible to heat-treat only a necessary part.
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公开(公告)号：US11181187B2
公开(公告)日：2021-11-23
申请号：US15967843
申请日：2018-05-01
摘要： A planetary gear system includes a planetary gear carrier having three or more posts extending from the planetary gear carrier, each post having a hardened exterior surface, and a planet pinion gear in contact with the hardened exterior surface of each post.
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公开(公告)号：US11162167B2
公开(公告)日：2021-11-02
申请号：US16210078
申请日：2018-12-05
申请人： GE AVIO S.R.L.
发明人： Lorenzo Rigo , Andrea Piazza , Diana Di Gioia
摘要： Methods for treating steel, along with the resulting treated steel, are provided. The method may comprise: nitriding a carburized Ferrium steel component such that the Ferrium steel component has a surface portion with a nitrogen content that is greater than 0% to about 5% by weight. Nitriding the Ferrium steel component may increase the surface hardness of the Ferrium steel. The surface portion may have a nitrogen content of about 0.05% to about 0.5% by weight.
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公开(公告)号：US20210032716A1
公开(公告)日：2021-02-04
申请号：US17046087
申请日：2019-05-10
申请人： KOMATSU LTD.
IPC分类号： C21D9/32 , C21D6/00 , C21D1/06 , C21D1/32 , C22C38/44 , C22C38/28 , C22C38/26 , C22C38/24 , C22C38/32 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00 , C23C8/22 , C23C8/80
摘要： A method for producing a machine component excellent in pitting resistance characteristics and toughness includes a carburizing step, performed on a steel material containing 0.13-0.30% C and 0.90-2.00% Cr in mass % and at least one of Si, Mn, Ni, Mo, Nb, V, Ti, B, Al, and N, balance Fe and unavoidable impurities; heating the material to 850-1030° C. to attain carbon concentration in a surface of 0.8-1.5%; cooling the material at an average rate of 5° C./sec or lower from a temperature higher than the Acm point of a surface layer to a cooling end temperature that is at least 50° C. lower than the A1 point to cause the surface layer to have a pearlite or bainite structure with dispersion; spheroidizing annealing at a temperature not higher than the Acm point at the surface layer; heating the material to not higher than the Acm point at the surface layer; and performing tempering.
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公开(公告)号：US10894992B2
公开(公告)日：2021-01-19
申请号：US16248838
申请日：2019-01-16
发明人： Hiroyoshi Tawa , Hiroyuki Inoue
摘要： A method for producing a steel member includes carburizing the steel member, pearlitizing austenite, and performing quenching. The pearlitizing of the austenite includes performing a first pearlite precipitation treatment of cooling the steel member to a first temperature lower than an austenite transformation start temperature and higher than 680° C. and holding the steel member at the first temperature to pearlitize a part of the austenite formed in the carburizing of the steel member, and performing a second pearlite precipitation treatment of further cooling the steel member to a second temperature equal to or lower than 680° C. and higher than a nose temperature and holding the steel member at the second temperature to pearlitize the austenite retained in the first pearlite precipitation treatment.
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公开(公告)号：US20200208726A1
公开(公告)日：2020-07-02
申请号：US16815502
申请日：2020-03-11
发明人： Tahany Ibrahim El-Wardany , Aaron T. Nardi , Daniel V. Viens , Wenjiong Gu , Eric J. Amis , Hayden M. Reeve
IPC分类号： F16H55/06 , C23C24/04 , B23P15/14 , B22F3/00 , B22F7/06 , C21D9/32 , B22F5/08 , B33Y10/00 , B33Y80/00 , F16H55/17 , C21D6/00 , C23C28/02 , C23C26/00 , B22F7/02 , B22F3/24 , B22F3/02
摘要： A novel manufacturing method for functionally graded component includes a cold sprayed additive manufactured core material and a cold sprayed additive manufactured set of teeth around said core made from another material.
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公开(公告)号：US10682682B2
公开(公告)日：2020-06-16
申请号：US15730957
申请日：2017-10-12
申请人： Gang Wang , Zhiguo Xing , Haidou Wang
发明人： Gang Wang , Zhiguo Xing , Haidou Wang
摘要： A device for performing strengthening treatment on a tooth root of a gear, a punch driver, a tooth root strengthening treatment device and a punch moving device are provided according to the present application. The device for performing the strengthening treatment on the tooth root of the gear according to the present application can impact a tooth root of a gear to be processed continuously under the action of the punch driver, and has a high efficiency while having a stable effect. The device in the present application is not limited by a complicated geometrical shape and a narrow space of the tooth root. Thus, it may be known that the devices according to the present application can address the issue of a low efficiency and poor effect in a current shot peening technique during performing the strengthening treatment on the tooth root.
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