Patents Assigned to Posco
  • Publication number: 20210285118
    Abstract: Provided is a manufacturing method of a surface-treated Zn—Ni alloy electroplated steel sheet, the method comprising the steps of: preparing a Zn—Ni alloy electroplated steel sheet including a steel sheet and a Zn—Ni alloy-plated layer with an Ni content of 5-20 wt % (S1); preparing an alkaline electrolyte solution in which 4-250 g/L of potassium hydroxide (KOH) or sodium hydroxide (NaOH) or both combined are added in distilled water (S2); and inside the alkaline electrolyte solution, placing the Zn—Ni alloy electroplated steel sheet as an anode and installing another metal sheet as a cathode, and applying 2-10 V of an alternating or direct current to conductor electrochemical etching such that a 3-point average value of the arithmetic average roughness (Ra) of the surface of the Zn—Ni alloy electroplated steel sheet reaches 200-400 nm, thereby producing a surface-treated electroplated steel sheet (S3).
    Type: Application
    Filed: June 28, 2019
    Publication date: September 16, 2021
    Applicant: POSCO
    Inventors: Kang-Min LEE, Hye-Jin YOO, Je-Hoon BAEK, Chang-Se BYEON, Jung-Su KIM
  • Patent number: 11111557
    Abstract: A non-oriented electrical steel sheet according to an embodiment of the present invention, comprises: Si: 2.0 to 3.5%, Al: 0.05 to 2.0%, Mn: 0.05 to 2.0%, In: 0.0002 to 0.003% by wt % and Fe and inevitable impurities as the remainder.
    Type: Grant
    Filed: December 19, 2017
    Date of Patent: September 7, 2021
    Assignee: POSCO
    Inventors: Hun Ju Lee, Yong Soo Kim, Su-Yong Shin
  • Patent number: 11111528
    Abstract: The present invention provides an apparatus and a method for detecting the presence of and/or determining the amount of a label-free microRNA using an atomic force microscope. The method is extremely selective and/or ultrasensitive. In particular, the present invention provides a cantilever comprising a probe that selectively binds to a double strand of DNA/RNA hybrid complex. The probe comprises a hybrid binding domain (HBD) or a variant thereof.
    Type: Grant
    Filed: January 22, 2017
    Date of Patent: September 7, 2021
    Assignees: POSCO, POSTECH ACADEMY-INDUSTRY FOUNDATION
    Inventors: Joon Won Park, Joung Hun Kim, Young Kyu Kim, Hyun Seo Koo, Yoon Hee Lee
  • Patent number: 11104974
    Abstract: Provided is a cold-rolled steel sheet manufactured by a cold-rolled steel sheet manufacturing method comprising a continuous annealing step, which has a composition comprising, by weight %: C: 0.1-0.15%; Si: 0.2% or less (including 0%); Mn: 2.3-3.0%; P: 0.001-0.10%; S: 0.010% or less (including 0%); Sol.Al: 0.01-0.10%; N: 0.010% or less (excluding 0%); Cr: 0.3-0.9%; B: 0.0010-0.0030%; Ti: 0.01-0.03%; Nb:0.01-0.03%; the balance being Fe and other impurities, and satisfies following relationship 1. [relationship 1] 1650?5541.4C+239Mn+169.1Cr+0.74SS-1.36RCS?1688, in which microstructure comprises, in area %, at least 90% of martensite and tempered martensite; and 10% or less of ferrite and bainite, in which the fraction of the tempered martensite in the martensite and the tempered martensite is 90% or more, in area %, and the ratio (b/a) of the C+Mn concentration (a) in the martensite to the C+Mn concentration (b) in the ferrite and the bainite is 0.65 or more.
    Type: Grant
    Filed: December 19, 2016
    Date of Patent: August 31, 2021
    Assignee: POSCO
    Inventors: Min-Seo Koo, Seong-Ho Han
  • Patent number: 11091823
    Abstract: An exemplary embodiment of the present invention relates to a magnesium alloy sheet and a manufacturing method thereof. According to an exemplary embodiment of the present invention, a magnesium alloy sheet including 1.0 to 10.5 wt % of Al, 0.1 to 2.0 wt % of Zn, 0.1 to 2.0 wt % of Ca, 0.03 to 1.0 wt % of Y, 0.002 to 0.02 wt % of Be, and a balance of Mg and inevitable impurities, with respect to a total of 100 wt % of the magnesium alloy sheet, may be provided.
    Type: Grant
    Filed: December 12, 2017
    Date of Patent: August 17, 2021
    Assignee: POSCO
    Inventors: Young-Wook Chae, Jun Ho Park, Jae Joong Kim, Oh-Duck Kwon
  • Patent number: 11091818
    Abstract: Provided are a high-strength cold-rolled steel sheet and a hot-dip galvanized steel sheet comprising in % by weight: 0.05 to 0.3% of carbon (C); 0.6 to 2.5% of silicon (Si); 0.01 to 0.5% of aluminum (Al); 1.5 to 3.0% of manganese (Mn); and the remainder being Fe and unavoidable impurities, the steel sheet has a microstructure comprised of, in an area fraction, ferrite in an amount of 60% or less, lath-type bainite of 25% or more, martensite of 5% or more, and lath-type retained austenite in an amount of 5%, wherein the ferrite has an average grain diameter of 2 ?m or less and the ferrite satisfies Fn2, defined by relational expression 1, is 89% or more and Fa5, defined by relational expression 2, is 70% or less.
    Type: Grant
    Filed: December 20, 2016
    Date of Patent: August 17, 2021
    Assignee: POSCO
    Inventors: Jai-Hyun Kwak, Hang-Sik Cho, Dong-Seoug Sin
  • Patent number: 11090907
    Abstract: Provided is a hot dip aluminized steel material including a base steel and a hot-dip Al—Si-coated layer, wherein the surface layer of the base steel is provided with an Al-enriched layer in which 2 wt % to 20 wt % of Al is solid-solubilized, and an interface between the base steel and the hot-dip Al—Si-coated layer has a double-layer structured interfacial alloy layer having different hardnesses.
    Type: Grant
    Filed: December 22, 2017
    Date of Patent: August 17, 2021
    Assignee: POSCO
    Inventors: Ki-Cheol Kang, Hyeon-Seok Hwang, Yon-Kyun Song, Il-Jeong Park
  • Patent number: 11079728
    Abstract: Disclosed is a smart factory platform for processing data obtained in a continuous process including a first process and a second process following the first process. The smart factory platform includes a distributed parallel processing system including at least one processing unit that generates mapping data by mapping a process identification (ID) to collection data collected from the continuous process and sorts the mapping data to generate sorting data, the process ID defining a process where the collection data occurs and the sorting data being generated for association processing between pieces of collection data collected from different processes; and a big data analysis system storing the sorting data with respect to the process ID.
    Type: Grant
    Filed: August 31, 2017
    Date of Patent: August 3, 2021
    Assignee: POSCO ICT CO., LTD.
    Inventors: Won Mo Yang, Hyun Woo Yu, Eun Kgu Kim, Man Jin Park, Jang Soo Jung, Tong Ki Kim, Young Lea Lee, Seong Cheol Park, Sung Yong Lee, Kyung Ho Ku, Seung Hyun Seo, Nam Geon Yang, Woo Kyum Kim, Jin Woong Kang, Seo Yeon Hwang, In Lee
  • Patent number: 11078564
    Abstract: Provided is a hot-dip galvanized steel sheet including a base steel sheet and a hot-dip zinc-based plating layer formed on the base steel sheet. The hot-dip zinc-based plating layer includes a Zn single phase having an average equivalent circular diameter of 120 ?m or less as a microstructure. In the Zn single phase, a Zn single phase having a crystal structure of which a {0001} plane is parallel to a surface of the steel sheet, is provided in an area fraction of 70% or less.
    Type: Grant
    Filed: December 22, 2016
    Date of Patent: August 3, 2021
    Assignee: POSCO
    Inventor: Sang-Heon Kim
  • Patent number: 11072838
    Abstract: To optimize equipment and processes to enhance magnetic domain refinement efficiency and to enhance workability to improve processing capability, a method of refining a magnetic domain of a grain-oriented electrical steel plate includes zigzag controlling for transferring the steel plate without being inclined in right and left directions along a production line center, steel plate support roll position adjusting for controlling a position of the steel plate in up and down directions while supporting the steel plate, laser beam irradiating for irradiating a laser beam to a surface of the steel plate to melt the steel plate to form a groove in the surface of the steel plate, and removing for absorbing and removing radiant heat due to reflection of the laser beam irradiated to the surface of the steel plate during the laser beam irradiating.
    Type: Grant
    Filed: December 26, 2016
    Date of Patent: July 27, 2021
    Assignee: POSCO
    Inventors: Seung Ho Lim, Do Ryun Lee, Jin Ho Kim, Myung Sik Chun, Gyoo Taek Lee, Seong Cheol Hong
  • Patent number: 11065720
    Abstract: By optimizing equipment and processing, magnetic domain miniaturization efficiency can be increased, workability can be improved, and processing ability can be increased through same. Provided is a method for miniaturizing the magnetic domains of a directional electric steel plate, the method comprising: a steel plate supporting roll position adjusting step of controlling the vertical direction position of a steel plate while supporting the steel plate progressing along a production line; and a laser emitting step of melting the steel plate by emitting a laser beam to form grooves on the surface of the steel plate and a removing steel plate surface step of to remove remaining spatters dropped on the surface of the steel plate after the laser emitting.
    Type: Grant
    Filed: January 18, 2017
    Date of Patent: July 20, 2021
    Assignee: POSCO
    Inventors: Seong Cheol Hong, Ki Young Min, Gyoo Taek Lee, Se min Park, Oh Yeoul Kwon, Jae Kyoum Kim
  • Patent number: 11066717
    Abstract: A manufacturing method of an oriented electrical steel sheet according to an exemplary embodiment of the present invention includes: a step of manufacturing a steel slab including one kind or more among Si at 2 to 7%, Sn at 0.03 to 0.10%, and Sb at 0.01 to 0.05% as wt %; a step of hot-rolling the steel slab to manufacture a hot rolled sheet; a step of cold-rolling the hot rolled sheet to manufacture a cold rolled sheet; a step of decarburizing and nitriding the cold rolled sheet for primary recrystallization annealing; a step of coating and drying an annealing separating agent on the primary recrystallization-annealed cold rolled sheet; and a step of secondary recrystallization-annealing the cold rolled sheet coated with the annealing separating agent.
    Type: Grant
    Filed: December 20, 2016
    Date of Patent: July 20, 2021
    Assignee: POSCO
    Inventors: Chang Soo Park, Min Soo Han, Jong Ho Park, Hyung Don Joo, Yun Su Kim
  • Patent number: 11066573
    Abstract: The present invention relates to a resin composition comprising 40% to 50% by weight of a polyester resin on the basis of a total of 100% by weight of the composition, the polyester resin comprising a main resin and an auxiliary resin, wherein the main resin has a higher molecular weight than the auxiliary resin, and the difference of a glass transition temperature between the main resin and the auxiliary resin is 25° C. or less.
    Type: Grant
    Filed: December 9, 2016
    Date of Patent: July 20, 2021
    Assignee: POSCO
    Inventors: Moon Jae Kwon, Kee Cheol Park, Choon Ho Kang
  • Patent number: 11059269
    Abstract: Disclosed are a hot dip coated steel and a method for manufacturing the same, the hot dip coated steel comprising a hot rolled steel and a hot dip coated layer formed on the surface of the hot rolled steel, wherein the hot rolled steel comprises: by wt %, 0.05-0.15% of C, 0.5% or less of Si (excluding 0%), 0.5-1.5% of Mn, 0.01-0.05% of Nb, 0.005-0.05% of V, 0.03% or less of P (excluding 0%), 0.015% of S or less (excluding 0%), 0.05% or less of Al (excluding 0%), 0.01% or less of N (excluding 0%), and the balance of Fe and inevitable impurities; 90 area % or more of ferrite as the microstructure thereof; and 5,000-15,000/?m2 of V-based precipitates.
    Type: Grant
    Filed: December 19, 2017
    Date of Patent: July 13, 2021
    Assignee: POSCO
    Inventor: Jin-You Kim
  • Patent number: 11060170
    Abstract: A non-oriented electrical steel sheet according to an embodiment of the present invention may include, by weight, by weight, 2.0 to 3.5% of Si, 0.3 to 2.5% of Al, 0.3 to 2.5% of Mn, individually or in a total amount of 0.0005 to 0.03% of at least one of Ga and Ge, and the remainder including Fe and impurities, and may satisfy the following Formula 1. 0.2?([Si]+[Al]+0.5×[Mn])/(([Ga]+[Ge])×1000)?5.27??[Formula 1] ([Si], [Al], [Mn], [Ga] and [Ge] represent the content (% by weight) of Si, Al, Mn, Ga and Ge, respectively).
    Type: Grant
    Filed: December 19, 2017
    Date of Patent: July 13, 2021
    Assignee: POSCO
    Inventors: Jae Hoon Kim, Hun Ju Lee, Yong Soo Kim, Su-Yong Shin
  • Patent number: 11060162
    Abstract: The non-oriented electrical steel sheet according to one embodiment of the present invention includes: by weight, 2.0% to 4.0% of Si; 0.001% to 2.0% of Al; 0.0005% to 0.009% of S; 0.02% to 1.0% of Mn, 0.0005% to 0.004% of N; 0.004% or less of C (excluding 0%); 0.005% to 0.07% of Cu; 0.0001% to 0.007% of O; individually or in a total amount of 0.05% to 0.2% of Sn or P; and the remainder comprising Fe and impurities; wherein the non-oriented electrical steel sheet is composed of a surface portion to 2 ?m from the surface of the steel sheet in the thickness direction and a base portion exceeding 2 ?m from the surface of the steel sheet in the thickness direction, and wherein the number of surfides having a diameter of 10 nm to 100 nm is larger than the number of the nitrides having a diameter of 10 nm to 100 nm, in the same area of base portion.
    Type: Grant
    Filed: December 19, 2017
    Date of Patent: July 13, 2021
    Assignee: POSCO
    Inventors: Se Il Lee, June Soo Park, Jae Hoon Kim
  • Patent number: 11060158
    Abstract: The present invention relates to a method of manufacturing a directional electric steel plate having excellent surface wettability and magnetic properties. More particularly, the present invention relates to a directional electric steel plate in which a surface of a steel plate consisting of Si: 2.0 to 6.5%, acid soluble Al: 0.4 to 5%, Mn: 0.20% or less (0% exclusive), N: 0.010% or less (0% exclusive), S: 0.010% or less (0% exclusive), P: 0.005 to 0.05%, C: 0.04 to 0.12% and a balance of Fe and other unavoidable impurities is hot-dip plated with aluminum or an aluminum-silicon alloy, and heat-treated, so that aluminum on the hot-dip plated layer is diffused or infiltrated into the steel plate, and a method of manufacturing the same.
    Type: Grant
    Filed: December 21, 2015
    Date of Patent: July 13, 2021
    Assignee: POSCO
    Inventor: Dae Hyun Song
  • Patent number: 11060163
    Abstract: Provided is a method for refining magnetic domains of grain-oriented electrical steel plates including: a steel plate supporting roll position adjusting step of controlling a vertical direction position of the steel plate while supporting the steel plate; a laser radiating step of melting the steel plate by radiating a laser beam to form grooves on the surface of the steel plate; and a setting and maintaining step of setting and maintaining an internal operation environment of a laser room in which the laser radiation is performed, so as to increase magnetic domain refinement efficiency and improve workability by optimizing equipment and processes, thereby increasing the processing capacity.
    Type: Grant
    Filed: December 23, 2016
    Date of Patent: July 13, 2021
    Assignee: POSCO
    Inventors: Seong Cheol Hong, Jae Kyoum Kim, Ki Young Min, Se Min Park, Myung Sik Chun, Gyoo Taek Lee, Oh Yeoul Kwon, Hyun Chui Park
  • Patent number: 11047029
    Abstract: There are provided a ferrite stainless steel for a polymer fuel cell separator having excellent corrosion resistance and interfacial contact resistance under an operating environment of a polymer fuel cell, and a preparation method of the stainless steel. A stainless steel includes C: 0.02 wt % or less, N: 0.02 wt % or less, Si: 0.4 wt % or less, Mn: 0.2 wt % or less, P: 0.04 wt % or less, S: 0.02 wt % or less, Cr: 25.0 to 32.0 wt %, Cu: 0 to 2.0 wt %, Ni: 0.8 wt % or less, Ti: 0.5 wt % or less, Nb: 0.5 wt % or less, waste Fe and inevitably contained elements. A preparation method of the stainless steel having a second passive film formed on a surface thereof includes forming a first passive film on the surface of the stainless steel by bright-annealing or annealing-pickling the stainless steel; removing the first passive film by pickling the stainless steel in a 10 to 20 wt % sulfuric acid solution at a temperature of 50 to 75° C.
    Type: Grant
    Filed: February 8, 2016
    Date of Patent: June 29, 2021
    Assignee: POSCO
    Inventors: Jonghee Kim, Kihoon Jo, Younghwan Kim, Jeonghe Lee, Yunyong Lee, Jinsuk Kim, Jongheon Seok
  • Patent number: 11034132
    Abstract: Provided are a high manganese hot dip aluminum-plated steel sheet and a method for manufacturing the same, the steel sheet including: a base steel comprising, by wt %, 0.3-0.9% of C, 10-25% of Mn, 0.01-0.5% of Ti, 0.01-0.2% of Sn, 0.01-0.1% of Sb, and the balance of Fe and inevitable impurities; a hot dip aluminum-based steel plated layer formed on the base steel sheet and comprising 0.1 wt % or more of a sum of one or more types among Li, Na, and K, and the balance of Al and inevitable impurities; and an Al—Fe—Si—Mn based alloy layer formed between the base steel sheet and the aluminum-based plated layer, and having a dual structure with different average Fe amounts.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: June 15, 2021
    Assignee: POSCO
    Inventors: Young-Ha Kim, Chang-Sik Choi, Yon-Kyun Song, Kwang-Tai Min