Patents Examined by Anthony M Liang
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Patent number: 11951522Abstract: A method of forming a shaped steel object is provided. The method includes cutting a blank from an alloy composition including 0.05-0.5 wt. % carbon, 4-12 wt. % manganese, 1-8 wt. % aluminum, 0-0.4 wt. % vanadium, and a remainder balance of iron. The method also includes heating the blank until the blank is austenitized to form a heated blank, transferring the heated blank to a press, forming the heating blank into a predetermined shape to form a stamped object, and decreasing the temperature of the stamped object to a temperature between a martensite start (Ms) temperature of the alloy composition and a martensite final (Mf) temperature of the alloy composition to form a shaped steel object comprising martensite and retained austenite.Type: GrantFiled: March 20, 2023Date of Patent: April 9, 2024Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Jiachen Pang, Qi Lu, Jianfeng Wang
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Patent number: 11952650Abstract: A steel wire which has an excellent fatigue limit when made into a spring is provided. A chemical composition of the steel wire according to the present embodiment consists of, in mass %, C: 0.53 to 0.59%, Si: 2.51 to 2.90%, Mn: 0.70 to 0.85%, P: 0.020% or less, S: 0.020% or less, Cr 1.40 to 1.70%, Mo: 0.17 to 0.53%, V: 0.23 to 0.33%, Cu: 0.050% or less, Ni: 0.050% or less, Al: 0.0050% or less, Ti: 0.050% or less, N: 0.0070% or less, Ca: 0 to 0.0050%, and Nb: 0 to 0.020%, with the balance being Fe and impurities. In the steel wire, a number density of V-based precipitates having a maximum diameter ranging from 2 to 10 nm is 500 to 8000 pieces/?m2.Type: GrantFiled: October 15, 2020Date of Patent: April 9, 2024Assignees: NIPPON STEEL CORPORATION, NIPPON STEEL SG WIRE CO., LTD.Inventors: Shinya Teramoto, Yutaka Neishi, Michimasa Aono, Shuji Kozawa, Satoru Mineta, Tatsuro Ochi, Shoichi Suzuki
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Patent number: 11951539Abstract: A method for metal jetting is disclosed. The method for metal jetting includes introducing a first gas into an outer nozzle of an ejector nozzle from a first gas source introducing an additive to the first gas from a second source, combining the additive with the first gas. The method for metal jetting also includes ejecting a droplet of molten metal printing material from the ejector nozzle. The method for metal jetting includes allowing the additive to react with the droplet of molten metal printing material to form a modified molten metal printing material.Type: GrantFiled: August 31, 2021Date of Patent: April 9, 2024Assignee: ADDITIVE TECHNOLOGIES, LLCInventors: Mariusz Tadeusz Mika, Peter M. Gulvin
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Patent number: 11952647Abstract: There is provided a ferritic lightweight steel which contains 2.0 to 3.0 wt % manganese (Mn), 5.0 to 6.0 wt % aluminum (Al) and 0.1 to 0.3 wt % carbon (C) and has a tensile strength of 900 MPa to 1,108 MPa. The lightweight steel includes ferrite-austenite dual grains as a result of performing low-temperature tempering-induced partitioning (LTP) at 300° C. for 10 minutes after isothermal annealing.Type: GrantFiled: November 11, 2021Date of Patent: April 9, 2024Assignee: INDUSTRY-ACADEMIC COOPERATION FOUNDATION GYEONGSANG NATIONAL UNIVERSITYInventors: Jae Bok Seol, Hyo Ju Bae, Kwang Gyu Koh, Jung Gi Kim, Hyo Kyung Sung, Young Kook Lee
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Patent number: 11945027Abstract: In the mold powder, the content of F is 0.5% by mass or less (including 0% by mass), CaO and SiO2 are included as main components, the mass ratio of CaO to SiO2 (CaO/SiO2) is 0.6 to 1.4, the content of B2O3 is 0.3 to 2.8% by mass, the content of Na2O is 5.0 to 20.0% by mass, the total content of Li2O and K2O is 0 to 4.0% by mass, the content of MgO is 0 to 3.5% by mass, the content of Al2O3 is 1.0 to 8.0% by mass, and the content of MnO is 1.0% by mass or less (including 0% by mass).Type: GrantFiled: February 2, 2021Date of Patent: April 2, 2024Assignee: SHINAGAWA REFRACTORIES CO., LTD.Inventors: Junya Ito, Shoji Takahashi
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Patent number: 11946128Abstract: A method for desensitizing a metal alloy such as an aluminum (Al) alloy is presented. The surface of the alloy is treated by controlled laser beam irradiation. The scanning laser beam heats the alloy to reach a relative low temperature between a solvus temperature and a soften/annealing temperature of the metal alloy to controllably reduce the degree of sensitization (DOS) of the metal alloy. The locally rapid heating and cooling effects produced by scanning the laser can improve the future sensitization resistance of the metal alloy, reduce the average desensitization temperature applied, and maintain the mechanical properties of Al alloy at the same time.Type: GrantFiled: February 28, 2020Date of Patent: April 2, 2024Assignee: NUtech Ventures, Inc.Inventors: Yongfeng Lu, Leimin Deng, Chenfei Zhang, Shiding Sun, Lei Liu
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Patent number: 11946123Abstract: Provided is a method of easily producing a non-oriented electrical steel sheet that contains substantially no Al and contains large amounts of Si and Mn and has low iron loss, comprising hot rolling a slab having a specified chemical composition to obtain a hot-rolled sheet; coiling the hot-rolled sheet; cold rolling the hot-rolled sheet once or twice with intermediate annealing being performed therebetween, to obtain a cold-rolled sheet; and subjecting the cold-rolled sheet to final annealing, wherein the hot-rolled sheet after the hot rolling is cooled at an average cooling rate from 800° C. to 650° C. of 30° C./s or more, and thereafter the coiling is performed at 650° C. or less.Type: GrantFiled: April 7, 2023Date of Patent: April 2, 2024Assignee: JFE STEEL CORPORATIONInventors: Masanori Uesaka, Yoshiaki Zaizen, Tomoyuki Okubo, Hiroaki Nakajima, Yoshihiko Oda
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Patent number: 11946124Abstract: An Fe-based alloy for melting-solidification shaping including, in mass %: 18.0?Co<25.0; 12.0?Mo+W/2?20.0; 0.2?Mn?5.0; 0.5?Ni?10.0; and 0?Si?1.0, with the balance being Fe and unavoidable impurities, and satisfying the following expressions (1) and (2) when [M] represents a content of an element M expressed in mass % basis, 58?[Co]+3([Mo]+[W]/2)?95 (1), A/B?1.6 (2) where A=[Co]+[Ni]+3[Mn], and B=[Mo]+[W]/2+[Si], in which when the Fe-based alloy includes no Mo, the expressions (1) and (2) are calculated using [Mo]=0, when the Fe-based alloy includes no Si, the expression (2) is calculated using [Si]=0, and when the Fe-based alloy includes no W, the expressions (1) and (2) are calculated using [W]=0.Type: GrantFiled: September 27, 2022Date of Patent: April 2, 2024Assignee: DAIDO STEEL CO., LTD.Inventors: Takashi Yoshimoto, Kosuke Tomiyama
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Patent number: 11939642Abstract: A high-strength steel sheet having a tensile strength of 1,180 MPa or more, and specified chemical composition. The steel sheet includes a steel structure in which an area fraction of martensite having a carbon concentration of more than 0.7×[% C] and less than 1.5×[% C] is 55% or more, an area fraction of tempered martensite having a carbon concentration of 0.7×[% C] or less is 5% or more and 40% or less, a ratio of a carbon concentration in retained austenite to a volume fraction of retained austenite is 0.05 or more and 0.40 or less, and the martensite and the tempered martensite each have an average grain size of 5.3 ?m or less, where [% C] represents the content, by mass %, of compositional element C in steel.Type: GrantFiled: August 20, 2019Date of Patent: March 26, 2024Assignee: JFE STEEL CORPORATIONInventors: Hidekazu Minami, Yuji Tanaka, Junya Tobata, Takeshi Yokota
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Patent number: 11939650Abstract: A hot-rolled steel sheet includes, as chemical composition, C, Si, Mn, and sol.Al. In the hot-rolled steel sheet, an average of pole densities in crystal orientation group consisting of {110}<110> to {110}<001> in surface region is 0.5 to 3.0, a standard deviation of the pole densities in the crystal orientation group is 0.2 to 2.0, and the tensile strength is 780 to 1370 MPa.Type: GrantFiled: November 20, 2019Date of Patent: March 26, 2024Assignee: NIPPON STEEL CORPORATIONInventors: Shohei Yabu, Kunio Hayashi, Yuji Yamaguchi, Marina Mori, Naoki Inoue, Genki Abukawa
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Patent number: 11939639Abstract: A preferable aspect of the present invention provides: an ultra-high-strength hot-rolled steel sheet containing, by weight, one or two of 0.40-0.60% of C, 0.7-1.5% of Mn, 0.3% or less (excluding 0%) of Si, 0.03% or less (including 0%) of P, 0.004% or less (including 0%) of S, 0.04% or less (excluding 0%) of Al, 0.3% or less (excluding 0%) of Cr, 0.3% or less (excluding 0%) of Mo, 0.9-1.5% of Ni, and 0.9-1.5% of Cu, 1.1% or more of Cu+Ni, 0.04% or less (excluding 0%) of Ti, 0.005% or less (excluding 0%) of B, 0.006% or less (excluding 0%) of N, and the balance Fe and other impurities, the alloy elements satisfying relational formulas 1 and 2 below, wherein a microstructure of the hot-rolled steel sheet comprises, by volume, 7% or more of ferrite and 93% or less of perlite; a steel pipe and a member each using the same; and manufacturing methods therefor.Type: GrantFiled: December 13, 2018Date of Patent: March 26, 2024Assignee: POSCO CO., LTDInventors: Hwan-Goo Seong, Yeol-Rae Cho, Seong-Beom Bae
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Patent number: 11935983Abstract: Methods and systems for using a photosintering system to sinter one or more paint layers for a paint circuit. In one aspect, a photosintering system includes a photosintering device including a light source and multiple proximity sensors, a data communication link, and one or more processors in data communication with the photosintering device over the data communication link, and is operable to perform the operations of obtaining an image of a sintering area, generating a grid of the sintering area including multiple sub-areas, and for each sub-area of the multiple sub-areas: determine a respective fractional sintering energy for the sub-area, indicate how to position a photosintering device relative to the sub-area, obtain current positional information for the photo sintering device, determining that the current positional, determine an exposure sintering energy for the particular sub-area, and trigger exposure of the exposure sintering energy to the particular sub-area.Type: GrantFiled: October 25, 2019Date of Patent: March 19, 2024Assignee: Google LLCInventors: Aleksey Bieneman, Katy Kasmai, Haydn Kirk Vestal
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Patent number: 11935676Abstract: An Sm—Fe—N-based magnetic material according to the present disclosure includes a main phase having a predetermined crystal structure. The main phase has a composition represented by a molar ratio formula (Sm(1-x-y-z)LaxCeyR1z)2(Fe(1-p-q-s)CopNiqMs)17Nh (where, R1 is a predetermined rare earth element, M is a predetermined element, and 0?x+y<0.04, 0?z?0.10, 0<p+q?0.10, 0?s?0.10, and 2.9?h?3.1 are satisfied). A lattice volume of the main phase is 0.830 nm3 to 0.840 nm3, and a density of the main phase is 7.70 g/cm3 to 8.00 g/cm3.Type: GrantFiled: September 21, 2021Date of Patent: March 19, 2024Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Daisuke Ichigozaki, Tetsuya Shoji, Noritsugu Sakuma, Akihito Kinoshita, Masaaki Ito
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Patent number: 11931805Abstract: A process is provided to remove a selective amount of material from a metal part fabricated by additive manufacturing in a self-terminating manner. The process can be used to remove support structures and trapped powder from a metal part as well as to smooth surfaces of a 3D printed metal part. In one embodiment, selected surfaces of the metal part are treated to make the selected surfaces at least one of mechanically and chemically unstable. The unstable portion of the metal support can then be removed chemically, electrochemically, with a pressure differential, and/or through vapor-phase etching. In one embodiment, the metal part may comprise one or more of an aluminum alloy, a titanium alloy, and a copper alloy. The process can be used to modify any fluid or vapor-accessible regions and surfaces of a 3D printed metal part.Type: GrantFiled: December 7, 2020Date of Patent: March 19, 2024Assignee: Colorado School of MinesInventors: Owen J. Hildreth, Subbarao Raikar
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Patent number: 11925985Abstract: Disclosed is a method of making a part, comprising: forming the part via an additive manufacturing process, wherein the additive manufacturing process comprises layering, melting, and solidifying a metal alloy based on a three dimensional numerical model, wherein the formed part comprises a microstructure, wherein the microstructure comprises an average columnar grain length; and heat treating the formed part, wherein heat treating comprises heating to between 750° C. and 1200° C. for a time between 0.5 hours and 10 hours and then cooling the formed part below 750° C., wherein after heat treating, the formed part has an average columnar grain length of about 400 micrometers to about 1000 micrometers, as measured using electron backscattered diffraction.Type: GrantFiled: June 26, 2019Date of Patent: March 12, 2024Assignee: HAMILTON SUNDSTRAND CORPORATIONInventors: Faramarz M. Zarandi, Jesus A. Garcia, Evan J. Butcher
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Patent number: 11927231Abstract: A brake rotor having a composite structure may include an annular body defining opposite friction surfaces of the brake rotor. The annular body may include a core made of an Al—Si alloy, a thermal barrier layer made of a thermally insulating material disposed on the core, and a wear-resistant layer made of an Fe—Al—Si—Zr alloy disposed on the core over the thermal barrier layer. The wear-resistant layer may define a first one of the opposite friction surfaces of the annular body.Type: GrantFiled: July 12, 2022Date of Patent: March 12, 2024Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLCInventors: Heewook Lee, Zhongyi Liu, Anil K. Sachdev, Tyson Whittier Brown, Ratandeep Singh Kukreja
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Patent number: 11920208Abstract: A cold-rolled and heat-treated steel sheet, has a composition comprising, by weight percent: n0.10%?C?0.25%, 3.5%?Mn—?6.0%, 0.5%?Si?2.0%, 0.3%?Al?1.2%, with Si+Al?0.8%, 0.10%?Mo?0.50%, S?0.010%, P?0.020%, N?0.008%. The cold-rolled steel sheet has a microstructure consisting of, in surface fraction: between 10% and 45% of ferrite, having an average grain size of at most 1.3 ?m, the product of the surface fraction of ferrite by the average grain size of the ferrite being of at most 35 ?m %, between 8% and 30% of retained austenite, the retained austenite having an Mn content higher than 1.1*Mn %, Mn % designating the Mn content of the steel, at most 8% of fresh martensite, at most 2.5% of cementite and partitioned martensite.Type: GrantFiled: December 18, 2018Date of Patent: March 5, 2024Assignee: ARCELORMITTALInventors: Coralie Jung, Astrid Perlade, Kangying Zhu, Frédéric Kegel
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Patent number: 11920206Abstract: A cold rolled steel flat product for packaging made of a low carbon steel having a thickness of less than 0.49 mm and a method of making. The steel flat product has a martensite-free microstructure and represents a standard grade for packaging with tensile strengths from 300 to 550 MPa, which can be produced from a cold-rolled steel sheet with a carbon content from 0.01% to 0.1% by weight by inductive annealing of the steel sheet and subsequent water cooling for quenching the recrystallization-annealed steel sheet. To achieve flatness of 5 I-units or less, the induction annealed steel sheet is first primarily cooled in the manufacturing process to a take-off temperature at a rate of less than 1000 K/s, with the take-off temperature being below the transformation temperature of 723° C., and thereafter a secondary cooling by water cooling with a water temperature of less than 80° C. at a rate of more than 1000 K/s.Type: GrantFiled: October 3, 2022Date of Patent: March 5, 2024Assignee: thyssenkrupp Rasselstein GmbHInventors: Burkhard Kaup, Peter Kirchesch, Manuel Köhl, Dimitrios Nouskalis, Alexander Gossen, Björn Ehmke
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Patent number: 11913085Abstract: A method for preparing a press-hardened steel component is provided. The method includes forming a heated blank by heating a steel alloy blank to a first temperature in a first zone of a furnace having two or more zones, and after the heating of the steel alloy blank to the first temperature, heating the steel alloy blank to a second temperature in a second zone of the furnace. The second temperature is greater than the first temperature. The first zone has a first flow rate for a protective gas, and the second zone has a second flow rate for the protective gas that is greater than the first flow rate. The method further includes stamping and quenching the heated blank at a constant rate to a temperature between a martensite finish temperature of the steel alloy defining the steel alloy blank and room temperature to form the press-hardened steel component.Type: GrantFiled: October 13, 2022Date of Patent: February 27, 2024Assignees: GM Global Technology Operations LLC, Northeastern UniversityInventors: Zhisong Chai, Tingdong Ren, Jinlong Zhu, Wei Xu, Jianfeng Wang
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Patent number: 11913118Abstract: The present disclosure relates to coated steel strip providing the steel with cathodic protection before and after the steel is press hardened or hot formed at a high austenitization temperature up to 950° C. The coating of the coated steel strip comprises zinc, aluminum, and at least one element selected from manganese (Mn) and/or antimony (Sb).Type: GrantFiled: February 28, 2019Date of Patent: February 27, 2024Assignees: NUCOR CORPORATION, TECK METALS LTD.Inventors: Weiping Sun, Nan Gao, Yihui Liu