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公开(公告)号：US20220389527A1
公开(公告)日：2022-12-08
申请号：US17775502
申请日：2020-11-11
Inventor： Koji TOKUDA , Tsuyoshi MIMURA
Abstract: In a method for producing a molten steel according to one aspect of the present invention, the solid-state direct reduced iron contains 3.0% by mass or more of SiO2 and Al2O3 in total and 1.0% by mass or more of carbon. A ratio of a metallic iron to the total iron content contained in the solid-state direct reduced iron is 90% by mass or more, and an excess carbon content Cx is 0.2% by mass or more to the carbons contained in the solid-state direct reduced iron. The method includes a step in a first furnace of melting 40 to 100% by mass of the solid-state direct reduced iron, and separating a molten pig iron having a carbon content of 2.0 to 5.0% by mass and a temperature of 1350 to 1550° C. and a slag having a basicity of 1.0 to 1.4 and a step in a second furnace of melting a remainder of the solid reduced iron together with the molten pig iron separated in the first furnace and blowing oxygen onto the molten material to decarburize into a molten steel.
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公开(公告)号：US20220355421A1
公开(公告)日：2022-11-10
申请号：US17624049
申请日：2020-06-24
Inventor： Hidenori NAKO , Keito ISHIZAKI , Junichi KAWATA , Yuta KINOSHITA
Abstract: An austenitic stainless steel flux cored wire may provide a welded metal having excellent cryogenic temperature toughness; a welded metal from the wire may have excellent cryogenic temperature toughness; and a welding method may involve such wire(s). An austenitic stainless steel flux cored wire in which a flux is filled in a steel-made shell. The flux cored wire may contain Si, Mn, Ni, Cr, C, P, and N in amounts each falling within a specified range relative to the entire mass of the wire, with the remainder made up by Fe and unavoidable impurities, and X1 is 17.5 to 22.0 inclusive, as calculated by formula (1): X1=[Ni]W+0.5×[Cr]W+1.6×[Mn]W+0.5×[Si]W+15×[C]W (1), wherein, in formula (1), [Ni]W, [Cr]W, [Mn]W, [Si]W and [C]W represent the contents (% by mass) of Ni, Cr, Mn, Si, and C, relative to the entire mass of the wire.
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公开(公告)号：US20220349020A1
公开(公告)日：2022-11-03
申请号：US17760969
申请日：2020-09-14
Inventor： Tadao MURATA , Muneaki IKEDA , Toshio MURAKAMI
IPC: C21D9/46 , C22C38/14 , C22C38/06 , C22C38/04 , C22C38/02 , C22C38/00 , C21D8/02 , C21D6/00 , B32B15/01 , C23C2/40
Abstract: The present invention provides a high-strength steel sheet, which can be used in various applications including automobile parts and exhibits excellent collision safety and excellent moldability, and a method for manufacturing the high-strength steel sheet. The high-strength steel sheet according to an aspect of the present invention satisfies a predetermined chemical composition and has a metallographic microstructure having ferrite fraction: 0% to 10%, MA fraction: 0% to 30%, hard phase other than ferrite and MA: 70% to 100% in terms of area proportion and retained austenite fraction: 5% to 30% in terms of volume proportion, and in the high-strength steel sheet, the skewness of IQ as analyzed by the EBRD method is −1.2 to −0.3 when the skewness is expressed by a predetermined relational expression in a case where crystal grains having a bcc structure and a bct structure are regarded as an aggregation of regions having an area of 0.05 μm2.
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公开(公告)号：US20220339689A1
公开(公告)日：2022-10-27
申请号：US17762243
申请日：2020-09-14
Inventor： Yasuhiro MAEDA , Toru HASHIMURA , Taiki YAMAKAWA
IPC: B21D39/20
Abstract: A method joins members for joining a first member being cylindrical and a second member being plate-shaped and having an opening. This method includes: inserting a first member into an opening of the second member; inserting an elastic body into the first member; guiding an outer diameter side of the first member with a pair of outer dies on both sides of the second member; and compressing an elastic body in the first member with a pair of inner dies. The inner dies compress the elastic body within a range in which the outer dies are positioned.
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公开(公告)号：US20220297221A1
公开(公告)日：2022-09-22
申请号：US17639083
申请日：2020-08-20
Inventor： Toru HASHIMURA , Ryohei IHARA , Taiki YAMAKAWA
Abstract: A joining method for overlapping and joining a plate-shaped portion of a first metal member and a plate-shaped portion of a second metal member, where the first metal member and the second metal member are made of dissimilar materials, includes a first step of forming an insertion hole in each of the plate-shaped portion of the first metal member and the plate-shaped portion of the second metal member, where the insertion holes communicate with each other when the plate-shaped portions of the first metal member and the second metal member are overlapped with each other, a second step of disposing a first joining member made of a metal material on a side of the plate-shaped portion of the first metal member opposite to the second metal member, a third step of inserting a second joining member made of the same metal material as that of the first joining member into the first metal member from a side of the second metal member through the insertion holes while the plate-shaped portions of the first metal member and the second metal member are overlapped with each other, and a fourth step of welding the first joining member and the second joining member and joining the first metal member and the second metal member through the first joining member and the second joining member.
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Patent Agency Ranking
36.发明申请公开(公告)号：US20220274182A1
公开(公告)日：2022-09-01
申请号：US17597713
申请日：2020-08-05
Inventor： Akimine HATSUDA , Takeshi YAMADA , Eisuke KUROSAWA , Yu MUKUDA
Abstract: A recoater of an additive manufacturing apparatus includes a powder retention section that defines a retention space in which a powder material is retained, and a slit part that has a slit inlet that receives the powder material retained and a slit outlet through which the powder material is discharged. The slit part includes a plate member fixed to the powder retention section by surface contact. A pair of slit inner wall surfaces that is connected to the slit outlet and faces each other is formed within a plate thickness of the plate member.
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公开(公告)号：US20220177985A1
公开(公告)日：2022-06-09
申请号：US17598044
申请日：2020-03-26
Inventor： Shoji IKUTA , Akito KASAI
Abstract: A method for a blast furnace includes pulverizing coal to make pulverized coal, and pulverizing iron ore to make pulverized iron ore, and injecting the pulverized coal and the pulverized iron ore from a tuyere. A loss on ignition of the iron ore is greater than or equal to 9% by mass and less than or equal to 12% by mass, an injection rate of the pulverized coal is greater than or equal to 150 kg/tp, and an injection rate of the pulverized iron ore is greater than or equal to 2.5 kg/tp and less than or equal to 50.0 kg/tp.
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公开(公告)号：US11253944B2
公开(公告)日：2022-02-22
申请号：US16477714
申请日：2018-01-10
Inventor： Kenichi Watanabe , Reiichi Suzuki , Hideto Katsuma
IPC: B23K11/11 , B23K11/20 , B23K26/22 , B23K37/04 , B23K103/20
Abstract: A steel plate frame and a thin plate are made of different materials. A plurality of through holes are formed in a portion of the thin plate to be placed on the steel plate frame. A plurality of projections 6c are formed on a support plate, each of the projections being allowed to be inserted into a corresponding one of the through holes. An adhesive is applied to a portion of the steel plate frame on which the thin plate is placed. The thin plate is placed on the steel plate frame, and the steel plate frame and the thin plate are bonded together by the adhesive. The support plate is placed on the thin plate to insert the projections into the through holes. The projections and the steel plate frame are welded to form a plurality of welded spots.
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公开(公告)号：US20210387278A1
公开(公告)日：2021-12-16
申请号：US17291759
申请日：2019-09-19
Inventor： Reiichi SUZUKI
IPC: B23K9/23 , B23K9/173 , B23K9/167 , B23K9/14 , B23K9/007 , B23K10/02 , B23K26/22 , B23K26/32 , B23K26/348 , B21K25/00 , B23P11/00
Abstract: A welding method for joining a first plate made of a material other than steel and a second plate made of steel includes a step of making a hole through each of the first plate and the second plate, a press-fitting step, an overlapping step, and a filling and welding step. A shaft portion of a joining assist member being solid, being made of steel, and having an outer shape with step having the shaft portion and a flange portion is press-fitted in the hole of the first plate. The first plate and the second plate is overlapped such that the shaft portion faces the hole of the second plate. The hole of the second plate is filled with a weld metal and the second plate and the joining assist member are welded.
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公开(公告)号：US20210381428A1
公开(公告)日：2021-12-09
申请号：US17284894
申请日：2019-11-11
Inventor： Takashi SATO , Ryo NAKAMICHI
Abstract: A compressed air energy storage power generation device includes a compression/expansion combined machine having a function to produce compressed air utilizing electric power and a function to generate electric power utilizing the compressed air, a pressure storage unit that is fluidly connected to the compression/expansion combined machine and stores the compressed air, inverters that adjust rotation speed of the compression/expansion combined machine, a flow rate adjustment valve that adjusts amount of the compressed air supplied from the pressure storage unit to the compression/expansion combined machine, and a control device that reduces, when receiving a command value that reduces amount of power generated by the compression/expansion combined machine, amount of power generated by the compression/expansion combined machine by making the inverters to reduce rotation speed of the compression/expansion combined machine and decreasing an opening degree of the flow rate adjustment valve.
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