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公开(公告)号：US20200222982A1
公开(公告)日：2020-07-16
申请号：US16614502
申请日：2018-03-23
Applicant: Hitachi, Ltd.
Inventor： Kinya AOTA
Abstract: There is provided an additive manufacturing apparatus that can effectively removing fume even in a vacuum state. An additive manufacturing apparatus 1 includes a fume capturing mechanism 8 that is provided to be movable in a space R defined between a beam source 9 and a stage 51, and that captures fume F generated due to melting of a powder P.
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公开(公告)号：US20170209954A1
公开(公告)日：2017-07-27
申请号：US15328280
申请日：2015-07-17
Applicant: HITACHI, LTD.
Inventor： Takahiko KATO , Kousuke KUWABARA , Tadashi FUJIEDA , Kinya AOTA , Isamu TAKAHASHI , Hiroyuki SATAKE , Kenji YAMAGA , Hajime MURAKAMI
CPC classification number: B23K15/0086 , B22F1/0003 , B22F3/1055 , B22F9/082 , B22F2009/0824 , B22F2009/0888 , B22F2998/10 , B23K15/0093 , B33Y10/00 , B33Y70/00 , B33Y80/00 , C22C30/00 , C22C33/0257 , Y02P10/295 , C21C5/5211 , C21C7/0075 , C21C7/10
Abstract: An alloy structure has an arbitrary shape dimension which has high uniformity in the distribution of the element composition. The alloy structure contains Fe and at least four elements, which are selected from the group consisting of elements from atomic number 13 to atomic number 79 included in Group 3 to Group 16 of the periodic table of the elements and have a ratio of the atomic radius to an Fe atom of 0.83 or more but 1.17 or less, each of Fe and the four elements is contained in an atomic concentration range of 5 at % or more but 30 at % or less, a difference in atomic concentration between at least four elements among the at least four elements and Fe is in a range of less than 3 at %, and the alloy structure has, a column crystal in which the at least four elements and Fe are solid-dissolved.
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公开(公告)号：US20160325377A1
公开(公告)日：2016-11-10
申请号：US15110250
申请日：2014-01-17
Applicant: HITACHI, LTD.
Inventor： Xudong ZHANG , Kinya AOTA , Masanori MIYAGI
IPC: B23K26/082 , B23K26/21 , B23K26/12 , B23K26/0622
CPC classification number: B23K26/082 , B23K26/0622 , B23K26/123 , B23K26/14 , B23K26/21 , B23K26/244 , B23K26/32 , B23K2103/05 , B23K2103/50
Abstract: An object of the present invention is to reduce spatter generation by stabilizing a keyhole in a laser welding method. A welded joint in which a plurality of workpieces are welded by irradiation with a laser beam, wherein the following formulae 1 to 3 are satisfied, b/a≧0.6—(formula 1), h/d≧1.0—(formula 2), and h/a
Abstract translation: 本发明的目的是通过在激光焊接方法中稳定钥匙孔来减少飞溅物的产生。 一种焊接接头，其中通过照射激光束焊接多个工件，其中满足以下公式1至3，b /a≥0.6-（式1），h /d≥1.0-（式2）， 和h / a <3.0-（公式3），其中a是跨越多个工件形成的焊道的表面宽度，h是焊道的最大穿透深度，b是焊道的穿透宽度 焊缝的穿透深度为h / 2的位置，d为焊缝中心位置处的贯通深度。
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Patent Agency Ranking
公开(公告)号：US20210189537A1
公开(公告)日：2021-06-24
申请号：US17058250
申请日：2019-03-11
Applicant: Hitachi, Ltd.
Inventor： Takahiro ISHIZAKI , Yusaku MARUNO , Kinya AOTA , Yingjuan YANG
Abstract: An austenitic stainless steel includes a mixed grain structure composed of a columnar crystal having an average crystal grain size of 20 μm or less and an equiaxed crystal having an average crystal grain size of 5.0 μm or less, in which an area proportion of the columnar crystal in the mixed grain structure is 20% or more, and an average crystal grain size of the whole mixed grain structure is 5.0 μm or less. Accordingly, it is possible to provide a material having excellent irradiation resistance and mechanical properties.
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公开(公告)号：US20170209922A1
公开(公告)日：2017-07-27
申请号：US15327974
申请日：2015-07-17
Applicant: HITACHI, LTD.
Inventor： Takahiko KATO , Kousuke KUWABARA , Tadashi FUJIEDA , Kinya AOTA , Isamu TAKAHASHI , Kenji YAMAGA , Hiroyuki SATAKE , Hajime MURAKAMI
CPC classification number: B22F1/0014 , B22D23/00 , B22F3/1055 , B22F9/082 , B22F2009/0824 , B22F2009/0848 , B22F2998/10 , B33Y70/00 , C22C1/02 , C22C1/0433 , C22C1/06 , C22C30/00 , C22C33/0285 , Y02P10/295 , C21C5/5211 , C21C7/0075 , C21C7/10
Abstract: An alloy structure which has high uniformity in the distribution of the element composition and the mechanical strength and excellent high-temperature strength and corrosion resistance, contains Fe and at least four elements, which are selected from the group consisting of elements from atomic number 13 to atomic number 79, included in Group 3 to Group 16 of the periodic table of the elements, and have a ratio of the atomic radius to an Fe atom of 0.83 or more but 1.17 or less, each of the elements in an atomic concentration range of 5 at % or more but 30 at % or less, a difference in atomic concentration among the at least four elements and Fe is in a range of less than 3 at %, and the alloy structure has, as a main crystal, a column crystal in which the at least four elements and Fe are solid-dissolved.
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公开(公告)号：US20210101332A1
公开(公告)日：2021-04-08
申请号：US16970185
申请日：2019-02-04
Applicant: HITACHI, LTD.
Inventor： Hirotsugu KAWANAKA , Kinya AOTA , Yingjuan YANG , Atsuhiko OONUMA
IPC: B29C64/153 , B29C64/393 , B29C64/364 , B29C64/268 , G06T7/00 , B29C64/286
Abstract: A manufacturing system of an additive manufacturing body is provided, by which the accuracy of evaluating a defect during additive manufacturing and the quality of the body can be improved. A manufacturing system of an additive manufacturing body of the present invention includes: an additive manufacturing device; an inspection device having a camera for photographing the powder layer or the solidified layer; and a control device that controls the additive manufacturing device and the inspection device, in which: the camera can photograph the powder layer for each powder layer forming step that is performed repeatedly, or can photograph the solidified layer for each solidified layer forming step that is performed repeatedly; and the control device selects a photographing condition of the camera according to the conditions of the additive manufacturing process.
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公开(公告)号：US20190299289A1
公开(公告)日：2019-10-03
申请号：US16301478
申请日：2017-03-08
Applicant: Hitachi, Ltd.
Inventor： Kinya AOTA
Abstract: The purpose of the present invention is to obtain an additive manufacturing device capable of manufacturing while reducing the flow rate of Ar gas. This additive manufacturing device is characterized in that a reduced-pressure atmosphere is maintained in a manufacturing area, an inert gas is supplied to the manufacturing area, the proportion of gaseous impurities in the manufacturing area is detected, and in case where the proportion of gaseous impurities exceeds a threshold value, the supply of inert gas is reduced.
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公开(公告)号：US20170330638A1
公开(公告)日：2017-11-16
申请号：US15529663
申请日：2014-11-26
Applicant: HITACHI, LTD.
Inventor： Ryou ISHIBASHI , Kinya AOTA , Xudong ZHANG , Hideki KITA , Seiji YAMASHITA
IPC: G21C3/322 , G21C15/243 , G21C5/12
CPC classification number: G21C3/322 , B23K1/0008 , B23K1/18 , B23K1/19 , B23K20/026 , B23K20/16 , B23K20/233 , B23K2101/06 , B23K2103/52 , C04B37/006 , C04B2235/9607 , C04B2235/9669 , C04B2237/083 , C04B2237/122 , C04B2237/126 , C04B2237/127 , C04B2237/16 , C04B2237/365 , C04B2237/38 , C04B2237/708 , C04B2237/72 , C04B2237/765 , C04B2237/84 , G21C3/07 , G21C3/10 , G21C3/326 , G21C5/126 , G21C15/243 , G21C21/02 , Y02E30/40
Abstract: A nuclear reactor fuel rod is a fuel rod for a light-water reactor. The nuclear reactor fuel rod includes a fuel cladding tube and an end plug, both of which are formed of a silicon carbide material. A bonding portion between the fuel cladding tube and the end plug is formed by brazing with a predetermined metal bonding material interposed, and/or by diffusion bonding. The predetermined metal bonding material has a solidus temperature of 1200° C. or higher. An outer surface of the bonding portion, and a portion of an outer surface of the fuel cladding tube and the end plug, which is adjacent to the outer surface of the bonding portion are covered by bonding-portion coating formed of a predetermined coating metal. The predetermined metal bonding material and the predetermined coating metal have an average linear expansion coefficient which is less than 10 ppm/K.
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