Abstract: The present invention provides a steel sheet comprising by weight: C: 0.10-0.30%; Si: 0.001-1.0%; Mn: 0.5-2.5%; Cr: 0.001-1.5%; Mo: 0.001-0.5%; Al: 0.001-0.5%; P: 0.001-0.01%; S: 0.001-0.01%; N: 0.001-0.01%; B: 0.0001-0.004%; Ti: 0.001-0.1%; Nb: 0.001 to 0.1%; and the balance consisting of Fe and inevitable impurities, and satisfying relational expression (1), and a microstructure includes comprising: a martensite phase; a bainite phase, wherein the fraction of the martensite phase is 50-90%, the fraction of the bainite phase is 5-50%, the sum of the fractions of the martensite phase and the bainite phase is 90% or more; and the balance consisting of a ferrite phase. CL<1,??[Relationship Expression (1)] CL=?0.692?0.158×[Mn]+0.121×[Mn]2+0.061×[Cr]2?0.319×[Mo]+0.035×[Hardness_HRC] (where CL is an effective cracking index, [Mn], [Cr] and [Mo] are the percentages by weight of respective corresponding alloy elements, and [Hardness_HRC] is a Rockwell hardness (HRC).
Abstract: An aluminum-iron-plated steel sheet including a base steel sheet and an aluminum-based plating layer on a surface of the base steel sheet. The aluminum-based plating layer includes an alloyed layer on the surface of the base steel sheet and an aluminum layer on the alloyed layer. The alloyed layer may be formed of one or more of Fe3Al, FeAl(Si), Fe2Al5, and FeAl3. A thickness of the alloyed layer may be 90% or more of a thickness of the aluminum-based plating layer. A surface fraction of Ti may be 2% or less and a surface fraction of Zn may be 1% or less, as observed on the surface of the aluminum-based plating layer.
Type:
Grant
Filed:
December 17, 2020
Date of Patent:
March 4, 2025
Assignee:
POSCO
Inventors:
Jin-Keun Oh, Seong-Woo Kim, Sang-Heon Kim, Hyo-Sik Chun
Abstract: A foreign substance capturing apparatus according to an embodiment of the present invention may comprise: a capturing body unit having an inlet port for introducing the air including magnetic foreign substances and an outlet port for discharging the air from which the magnetic foreign substances have been removed; and a magnetic isolation unit connected to the capturing body unit, including a magnetic member for isolating, by an attractive force, the magnetic foreign substances from the air flowing in the capturing body unit, and provided with a nonmagnetic member surrounding the magnetic member.
Type:
Grant
Filed:
November 17, 2020
Date of Patent:
March 4, 2025
Assignee:
POSCO
Inventors:
Seong-Cheol Hong, Ki-Young Min, Dong-Geun Kim, Oho-Cheal Kwon, Chang-Ho Kim
Abstract: A heat controllable battery pack is provided. The battery pack includes a lower cover including a first cooling line, through which a refrigerant moves, installed therein and supporting a lower portion of a plurality of cell modules, a plurality of crash structures installed in positions between the plurality of cell modules on an upper portion of the lower cover and including a second cooling line, through which the refrigerant cooling the cell modules moves, installed therein, a side frame protecting side surfaces of the plurality of cell modules, and an upper cover covering an upper portion of the plurality of cell modules.
Type:
Application
Filed:
December 21, 2022
Publication date:
February 27, 2025
Applicants:
POSCO CO., LTD., RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY
Abstract: It is related to a positive active material for all solid batteries, comprising: a positive active material with layered crystal structure, and wherein, a XRD spectrum of a grain of the positive active material has diffraction peaks corresponding to the (003) plane and the (110) plane, and a ratio of the full width at half maximum (FWHM) of the diffraction peak corresponding to the (110) plane to the full width at half maximum (FWHM) of the diffraction peak corresponding to the (003) plane is 1.30 to 1.60.
Type:
Application
Filed:
December 15, 2022
Publication date:
February 27, 2025
Applicants:
POSCO Holdings Inc., RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY
Inventors:
Yooncheol PARK, Ji Woong MOON, Tai Hee EUN, Young Sang KIM, Jeongsik YUN, Sang Cheol NAM
Abstract: A method for manufacturing a grain-oriented electrical steel sheet, according to one embodiment of the present invention, comprises the steps of: hot rolling a slab so as to manufacture a hot rolled sheet, the slab comprising, by wt %, 2.5-4.0% of Si, 0.03-0.09% of C, 0.015-0.040% of Al, 0.04-0.15% of Mn, 0.01% or less of S (excluding 0%), 0.002-0.012% of N, 0.01-0.05% of Sb, 0.03-0.1% of Sn, 0.05-0.2% of Cr and the balance of Fe and inevitable impurities; cold rolling the hot rolled sheet so as to manufacture a cold rolled sheet; and performing secondary recrystallization annealing on the steel sheet having undergone primary recrystallization annealing.
Abstract: A non-oriented electrical steel sheet according to one embodiment of the present invention comprises a steel sheet base material and an insulation film positioned on the steel sheet base material, satisfies the following formula 2 before stress relief annealing, and satisfies the following formula 3 after stress relief annealing, the steel sheet base material comprising, by wt %, 2.0-6.5% of Si, 0.1-1.3% of Al, 0.3-2.0% of Mn, 0.03% or less of Sn (excluding 0%), 0.02% or less of Sb (excluding 0%) and the balance of Fe and other inevitable impurities and satisfying the following formula 1. 0.03 ? [ Sn ] + [ Sb ] ? 0.005 [ Formula ? 1 ] 0.
Abstract: Provided are a steel plate for a pressure vessel with excellent cryogenic toughness and excellent ductility, and a manufacturing method thereof. The steel plate for a pressure vessel of the present invention comprises, in weight %, 0.05 to 0.15% of C; 0.20 to 0.40% of Si; 0.3 to 0.6% of Mn; 0.001 to 0.05% of Al; 0.012% or less of P; 0.015% or less of S; 4.0 to 5.0% of Ni; 0.001 to 0.10% of In; and the balance being Fe and unavoidable impurities, wherein a steel microstructure consists of 15 to 80 area % of tempered bainite and the balance being tempered martensite.
Abstract: An insulating coating composition for an electrical steel sheet, according to an embodiment of the present invention, comprises, on the basis of 100 wt % of a total composition: 10 to 50 wt % of a first composition including first inorganic material particles and second inorganic material particles; 10 to 50 wt % of a second composition including a metal phosphate; and 20 to 60 wt % of an organic/inorganic composite in which inorganic nano particles are substituted in an organic resin.
Type:
Application
Filed:
December 16, 2022
Publication date:
February 20, 2025
Applicant:
POSCO CO., LTD
Inventors:
Jungwoo Kim, Bongwoo Ha, Donggyu Lee, Taeyoung No
Abstract: According to aspects of the present invention, provided are a welded steel tube and a manufacturing method for the same which can provide excellent wear resistance and also minimize hot cracking of the welded portion, so a lifespan thereof may be effectively maximized even when applied in harsh wear-resistant environments.
Abstract: The present embodiment relates to an anode active material precursor, an anode active material, and a method for manufacturing same. An anode active material precursor according to an embodiment comprises: a carbon-based material comprising a metal compound; and a petroleum-based pitch, wherein the petroleum-based pitch comprises, on the basis of 10 parts by weight of the carbon-based material, 3 to 10 parts by weight, the softening point of the petroleum-based pitch may be 220-280° C., and the content of the metal compound may be greater than or equal to 10 ppm.
Type:
Application
Filed:
December 6, 2022
Publication date:
February 20, 2025
Applicants:
POSCO HOLDINGS INC., RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY
Inventors:
Gang Ho LEE, Sei Min PARK, Jong Hoon YOON, Yong Jung KIM, Jang-Yul KIM
Abstract: A double oriented electrical steel sheet according to an exemplary embodiment of the present disclosure contains, in wt %, at least 2.0% of Si, more than 0% and 0.02% or less of AI, 0.02-0.50% of Mn, more than 0% and 0.004% or less of C, and 0.0005-0.005% of S, with the remainder comprising Fe and inevitable impurities, wherein the area percentage of grains having a grain size of 2000 ?m or less is 25% or less.
Type:
Application
Filed:
December 20, 2022
Publication date:
February 20, 2025
Applicant:
POSCO CO., LTD
Inventors:
Hyunwoo Mun, Se Il Lee, Su-Yong Shin, Yunsu Kim
Abstract: A non-oriented electrical steel sheet according to an embodiment of the present invention includes: a steel sheet base material containing, by wt %: 2.0 to 6.5% of Si, 0.1 to 1.3% of Al, 0.3 to 2.0% of Mn, 0.005 to 0.06% of Cr, and a balance of Fe and other inevitable impurities; and an insulating coating film positioned on the steel sheet base material, wherein Formula 1 below is satisfied before stress relief annealing, and Formula 2 below is satisfied after the stress relief annealing. 0.1 ? [ Mn ? coating ? film ] ? / [ Mn ? 50 ] [ Formula ? 1 ] 10 ? [ Mn ? coating ? film ] ? / [ Mn ? 50 ] ? 1 [ Formula ? 2 ] (in Formulas 1 and 2, [Mn coating film] refers to an average content of Mn (wt %) in the insulating coating film, and [Mn 50] refers to a content of Mn (wt %) at a depth of 50 ?m from an interface between the steel sheet base material and the insulating coating film toward an inside of the steel sheet base material.
Abstract: The present exemplary embodiment relates to a negative active material precursor and its manufacturing method. According to an exemplary embodiment, it is disclosed a negative active material precursor, comprising: a stacked portion disposed at a center of the negative active material precursor and where graphite particles are stacked; and at least one of void portion disposed between the center and a surface portion of the negative active material precursor, wherein, an average particle diameter D50 is 10 to 18 ?m, and the below equation 1 is satisfied. ( D ? 90 - D ? 10 ) / D ? 50 ? 1. ? Equation ? 1 ? (In equation 1, D10, D50, and D90 mean particle diameters corresponding to 10, 50, and 90% volume accumulation from a small size, respectively.
Type:
Application
Filed:
December 13, 2022
Publication date:
February 20, 2025
Applicants:
POSCO HOLDINGS INC., RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY
Inventors:
Gang Ho LEE, Sei Min PARK, Jong Hoon YOON, Yong Jung KIM, Jang-Yul KIM
Abstract: Provided is a method of recovery lithium ion, including adding a residue after leaching lithium from an ore containing spodumene into a solution in which a lithium ion is dissolved; absorbing a lithium ion into the residue by reacting the solution containing the residue at 50-90° C.; and recovering a cake containing a lithium from the residue in which the lithium ion has been absorbed by performing solid-liquid separation.
Type:
Application
Filed:
December 15, 2022
Publication date:
February 20, 2025
Applicants:
POSCO CO., Ltd, RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY
Inventors:
Gi-Chun HAN, Young Geun SON, Sang Won KIM, Kee Uek JEUNG, Seung Goo KIM, Seung Seok LEE, Young-Seon KO
Abstract: The present exemplary embodiments relate to a graphite-based negative electrode material, a method of manufacturing the same, a negative electrode including the same, and a lithium secondary battery including the same. The graphite-based negative electrode material according to an exemplary embodiment includes: a graphite oxide obtained by oxidizing a surface of first graphite, and a graphite coating including second graphite and low crystalline carbon positioned on a surface of the second graphite, wherein the graphite coating to the graphite oxide is 1/9 to 1/3.
Type:
Application
Filed:
October 20, 2022
Publication date:
February 20, 2025
Applicant:
POSCO FUTURE M CO., LTD.
Inventors:
Ga Eul LEE, Ji Kwon JUNG, Heon Young LEE, Kyoung Muk LEE, Hae Jun KWON, Jin Wook MIN
Abstract: Disclosed herein are a floating structure and a wind power generation apparatus. The floating structure according to an aspect of the disclosure includes a plurality of columns providing buoyancy and a connecting body connecting the plurality of columns, wherein at least one of the plurality of columns includes a plurality of column bodies connected to each other, and a hollow portion formed surrounded by the plurality of column bodies.
Type:
Application
Filed:
October 27, 2022
Publication date:
February 20, 2025
Applicant:
POSCO CO., LTD
Inventors:
Eungsoo Kim, Myunghyun Noh, Kyusik Park
Abstract: The present disclosure relates to an aluminum-based plated steel that is provided for vehicles by hot forming, an aluminum-based alloy plated steel manufactured using the same, and method of manufacturing thereof.
Type:
Grant
Filed:
January 8, 2024
Date of Patent:
February 18, 2025
Assignee:
POSCO CO., LTD
Inventors:
Jin-Keun Oh, Il-Ryoung Sohn, Seong-Woo Kim, Jeom-Soo Shin
Abstract: The present disclosure relates to a steel wire rod enabling the omission of softening heat treatment and a method of manufacturing same. An embodiment of the present disclosure provides a steel wire rod enabling the omission of softening heat treatment and a method of manufacturing same, the steel wire rod comprising, in weight %, 0.2-0.45% of C, 0.02-0.4% of Si, 0.3-1.5% of Mn, 0.01-1.5% of Cr, 0.02-0.05% of Al, 0.01-0.5% of Mo, 0.01% or less of N, and the balance Fe and other unavoidable impurities, wherein the microstructure of the steel wire rod is a composite structure of proeutectoid ferrite+perlite as a main phase; the steel wire rod contains 10 area % or less (including 0%) of at least one of bainite or martensite; and the average colony size of the perlite is 5 ?m or less.
Type:
Grant
Filed:
October 18, 2019
Date of Patent:
February 18, 2025
Assignee:
POSCO CO., LTD
Inventors:
Jae-Seung Lee, Yo-Sep Yang, In-Gyu Park, Han-Hwi Kim
Abstract: An embodiment of the present invention provides a steel plate for a pressure vessel having excellent hydrogen-induced cracking resistance and a method of manufacturing same, the steel plate comprising, in weight %, 0.2 to 0.3% of carbon (C), 0.05 to 0.50% of silicon (Si), 0.1% to 0.5% (exclusive) of manganese (Mn) , 0.005 to 0.1% of aluminum (Al), 0.010% or less of phosphorus (P) , 0.0015% or less of sulfur (S), 0.001 to 0.03% of niobium (Nb), 0.001 to 0.03% of vanadium (V) , 0.001 to 0.03% of titanium (Ti), 0.01 to 0.20% of chromium (Cr), 0.01 to 0.15% of molybdenum (Mo) , 0.01 to 0.50% of copper (Cu) , 0.05 to 0.50% of nickel (Ni), 0.0005 to 0.0040% of calcium (Ca), and the balance of Fe and other inevitable impurities, wherein the average grain size of ferrite is 5-20 ?m.