Patents by Inventor Soon-Gi Lee

Soon-Gi Lee has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11017517
    Abstract: Provided are a method and apparatus for allocating differential bandwidth for each screen region by using image complexity information. According to an embodiment, a method and apparatus for receiving streaming data request a server for information relating to content to differentially determine quality of a plurality of regions divided from a predetermined frame of the content according to a network state; among at least one segment for each region encoded with at least one quality for each of the plurality of regions, receive a segment for each region encoded according to the quality for each region determined based on the information relating to the content from the server over a network; generate a reconstruction image for each region by decoding the segment for each region; and merge and render the reconstruction image for each region.
    Type: Grant
    Filed: September 27, 2017
    Date of Patent: May 25, 2021
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Kil-jong Kim, Soon-gi Hong, Do-young Joung, Chang-hyun Lee
  • Publication number: 20210117476
    Abstract: Provided are a method and apparatus for selecting key information of each group in grouped graph data. According to embodiments, key information of each group is selected using a term frequency-inverse document frequency (TF-IDF) value obtained for each node belonging to each group by using a TD-IDF algorithm for obtaining the importance of each term or keyword in a document.
    Type: Application
    Filed: November 27, 2019
    Publication date: April 22, 2021
    Applicant: Korea Internet & Security Agency
    Inventors: Seul Gi Lee, Sam Shin Shin, Byung Ik Kim, Soon Tai Park, Kyeong Han Kim, Yeon Seob Song
  • Patent number: 10961610
    Abstract: Provided according to one embodiment of the present invention are a non-magnetic steel material and a method for manufacturing the same. The steel material comprises 15-27 wt % of manganese, 0.1-1.1 wt % of carbon, 0.05-0.50 wt % of silicon, 0.03 wt % or less (0% exclusive) of phosphorus, 0.01 wt % or less (0% exclusive) of sulfur, 0.050 wt % or less (0% exclusive) of aluminum, 5 wt % or less (0% inclusive) of chromium, 0.01 wt % or less (0% inclusive) of boron, 0.1 wt % or less (0% exclusive) of nitrogen, and a balance amount of Fe and inevitable impurities, has an index of sensitivity of 3.4 or less, the index of sensitivity being represented by the following relational expression (1): [Relational expression 1]—0.451+34.131*P+111.152*Al?799.483*B+0.526*Cr?3.4 (wherein [P], [Al], [B] and [Cr] each mean a wt % of corresponding elements), and contains a microstructure with austenite at an area fraction of 95% or greater therein.
    Type: Grant
    Filed: December 23, 2016
    Date of Patent: March 30, 2021
    Assignee: POSCO
    Inventors: Un-Hae Lee, Sung-Kyu Kim, Soon-Gi Lee, Yong-Jin Kim, Hong-Yeol Oh
  • Patent number: 10655196
    Abstract: Provided are an austenitic steel having excellent machinability and ultra-low temperature toughness in a weld heat-affected zone including 15 wt % to 35 wt % of manganese (Mn), carbon (C) satisfying 23.6C+Mn?28 and 33.5C?Mn?23, 5 wt % or less (excluding 0 wt %) of copper (Cu), chromium (Cr) satisfying 28.5C+4.4Cr?57 (excluding 0 wt %), and iron (Fe) as well as other unavoidable impurities as a remainder, wherein a Charpy impact value of a weld heat-affected zone at ?196° C. is 41 J or more, and a method of manufacturing the steel. According to the present invention, a low-cost ultra-low temperature steel may be obtained, a stable austenite phase may be formed at low temperature, carbide formation may be effectively suppressed, and a structural steel having excellent machinability and ultra-low temperature toughness in a weld heat-affected zone may be provided.
    Type: Grant
    Filed: December 27, 2012
    Date of Patent: May 19, 2020
    Assignee: POSCO
    Inventors: Soon-Gi Lee, Jong-Kyo Choi, Young-Hwan Park, Hee-Goon Noh, Hyun-Kwan Cho, In-Shik Suh, In-Gyu Park, Hong-Ju Lee
  • Publication number: 20190010590
    Abstract: Disclosed is an austenitic material having excellent hydrogen-embrittlement resistance, comprising, by weight, 0.1-0.5% of C, 5% or less (0% exclusive) of Cu, 1% or less (0% exclusive) of N, a content of Mn satisfying Mn??10.7C+24.5, 10% or less of Cr, 5% or less of Ni, 5% or less of Mo, 4% or less of Si, 5% or less of Al, and a balance amount of Fe and inevitable impurities, with a T-El2/T-El1 ratio of 0.5 or higher, wherein T-El1 is an elongation at break according to a tensile test at 25° C. under an atmospheric condition of 1 atm and T-El2 is an elongation at break according to a tensile test at 25° C. under a hydrogen condition of 70 MPa.
    Type: Application
    Filed: December 22, 2016
    Publication date: January 10, 2019
    Inventors: Soon-Gi LEE, Sung-Kyu KIM, Sang-Deok KANG
  • Publication number: 20180363108
    Abstract: Provided according to one embodiment of the present invention are a non-magnetic steel material and a method for manufacturing the same. The steel material comprises 15-27 wt % of manganese, 0.1-1.1 wt % of carbon, 0.05-0.50 wt % of silicon, 0.03 wt % or less (0% exclusive) of phosphorus, 0.01 wt % or less (0% exclusive) of sulfur, 0.050 wt % or less (0% exclusive) of aluminum, 5 wt % or less (0% inclusive) of chromium, 0.01 wt % or less (0% inclusive) of boron, 0.1 wt % or less (0% exclusive) of nitrogen, and a balance amount of Fe and inevitable impurities, has an index of sensitivity of 3.4 or less, the index of sensitivity being represented by the following relational expression (1): [Relational expression 1]—0.451+34.131*P+111.152*Al?799.483*B+0.526*Cr?3.4 (wherein [P], [Al], [B] and [Cr] each mean a wt % of corresponding elements), and contains a microstructure with austenite at an area fraction of 95% or greater therein.
    Type: Application
    Filed: December 23, 2016
    Publication date: December 20, 2018
    Inventors: Un-Hae LEE, Sung-Kyu KIM, Soon-Gi LEE, Yong-Jin KIM, Hong-Yeol OH
  • Publication number: 20180274056
    Abstract: The present invention relates to a wear resistant steel material which can be suitably used for industrial machinery, structural materials, steel materials for slurry pipes, sour steel materials, mining, transportation and storage fields, etc. in the oil gas industry which require properties such as ductility and wear resistance. More particularly, the present invention relates to a wear resistant steel material excellent in toughness and internal quality, and a method for manufacturing the same.
    Type: Application
    Filed: December 16, 2016
    Publication date: September 27, 2018
    Inventors: Yong-Jin KIM, Soon-Gi LEE, Il-Cheol YI, Sung-Kyu KIM, Sang-Deok KANG, Un-Hae LEE
  • Patent number: 10041156
    Abstract: The present invention relates to a high strength austenitic-based steel with remarkable toughness of a welding heat-affected zone and a preparation method therefor. One embodiment of the present invention provides: a high strength austenitic-based steel with remarkable toughness of a welding heat-affected zone, comprising 0.8-1.5 wt % of C, 15-22 wt % of Mn, 5 wt % or less of Cr (except 0), and the balance of Fe and other inevitable impurities, and further comprising at least one of the following (a) and (b), wherein the microstructure of a welding heat-affected zone comprises 90% or more of austenite by volume fraction; and a preparation method therefor. (a) Mo: 0.1-1% and B: 0.001-0.02% (b) Ti: 0.01-0.3% and N: 0.003-0.1%.
    Type: Grant
    Filed: December 24, 2013
    Date of Patent: August 7, 2018
    Assignee: POSCO
    Inventors: Hak-Cheol Lee, In-Shik Suh, Soon-Gi Lee, In-Gyu Park, Yong-Jin Kim, Hong-Ju Lee
  • Patent number: 9945014
    Abstract: A high-manganese wear-resistant steel having excellent weldability comprises 5 to 15 wt % of Mn, 16?33.5C+Mn?30 of C, 0.05 to 1.0 wt % of Si, and a balance of Fe and other inevitable impurities. The microstructure thereof includes martensite as a major component, and 5% to 40% of residual austenite by area fraction.
    Type: Grant
    Filed: December 28, 2012
    Date of Patent: April 17, 2018
    Assignee: POSCO
    Inventors: Soon-Gi Lee, In-Shik Suh, In-Gyu Park, Hong-Ju Lee
  • Publication number: 20170362675
    Abstract: Provided is a steel sheet for low-temperature service, which can be used at a wide temperature range from low temperature to room temperature in liquefied gas storage tanks and transport facilities. The steel sheet for low-temperature service has an excellent surface processing quality even after a processing processes is performed, such as a tension process. The a steel sheet contains manganese (Mn, 15-35 wt %), carbon (C, satisfying 23.6C+Mn?28 and 33.5C—Mn?23), copper (Cu, 5 wt % or less (excluding 0 wt %)), chrome (Cr, satisfying 28.5C+4.4Cr?57 (excluding 0 wt %)), titanium (Ti, 0.01-0.5 wt %), nitrogen (N, 0.003-0.2 wt %), the balance iron (Fe), and other inevitable impurities. Ti and N satisfy relational expression 1 below. [Relational expression 1] 1.0?Ti/N?4.5 (Mn, C, Cr, Ti, and N in the respective expressions mean wt % of respective ingredient contents).
    Type: Application
    Filed: December 11, 2015
    Publication date: December 21, 2017
    Inventors: Soon-Gi LEE, In-Shik SUH, Yong-Jin KIM, Sang-Deok KANG
  • Publication number: 20170138511
    Abstract: There are provided an expandable high-strength steel material and an expanded high-strength steel pipe having excellent expandability and collapse resistance, and methods for manufacturing the expandable high-strength steel material and the expanded high-strength steel pipe. The expandable high-strength steel material including, by weight, manganese (Mn): 12% to 18%, carbon (C): 0.3% to 0.6%, and a balance of iron (Fe) and inevitable impurities, wherein the carbon (C) and the manganese (Mn) satisfy the following condition: 23?35.5C+Mn?38. Before being expanded, the expandable high-strength steel material has an austenite single phase microstructure, and after being expanded, the expandable high-strength steel material has a microstructure including 5 area % to 50 area % martensite and 50 area % to 95 area % austenite.
    Type: Application
    Filed: November 28, 2014
    Publication date: May 18, 2017
    Inventors: Hak-Cheol LEE, In-Shik SUH, Soon-Gi LEE, Hong-Ju LEE
  • Patent number: 9650703
    Abstract: There are provided a wear resistant austenitic steel having superior machinability and toughness in weld heat affected zones and a method for producing the austenitic steel. The austenitic steel includes, by weight %, manganese (Mn): 15% to 25%, carbon (C): 0.8% to 1.8%, copper (Cu) satisfying 0.7C-0.56(%)?Cu?5%, and the balance of iron (Fe) and inevitable impurities, wherein the weld heat affected zones have a Charpy impact value of 100 J or greater at ?40° C. The toughness of the austenitic steel is not decreased in weld heat affected zones because the formation of carbides during welding is suppressed, and the machinability of the austenitic steel is improved so that a cutting process may be easily performed on the austenitic steel. The corrosion resistance of the austenitic steel is improved so that the austenitic steel may be used for an extended period of time in corrosive environments.
    Type: Grant
    Filed: December 27, 2012
    Date of Patent: May 16, 2017
    Assignee: POSCO
    Inventors: Soon-Gi Lee, Jong-Kyo Choi, Hee-Goon Noh, Hong-Ju Lee, In-Shik Suh, In-Gyu Park
  • Publication number: 20160319407
    Abstract: Steel for low-temperature service having a high degree of surface processing quality comprises: manganese (Mn): 15 wt % to 35 wt %, carbon (C) satisfying conditions of: 23.6C+Mn?28 and 33.5C?Mn?23, copper (Cu): 5 wt % or less (excluding 0 wt %), nitrogen (N): 1 wt % or less (excluding 0 wt %), chromium (Cr) satisfying a condition of: 28.5C+4.4Cr?57, nickel (Ni): 5 wt % or less, molybdenum (Mo): 5 wt % or less, silicon (Si): 4 wt % or less, aluminum (Al): 5 wt % or less, and a balance of iron (Fe) and inevitable impurities. Stacking fault energy (SFE) of the steel is 24 mJ/m2 or greater. The SFE is calculated by a formula: SFE (mJ/m2)=1.6Ni?1.3Mn+0.06Mn2?1.7Cr+0.01Cr2+15Mo?5.6Si+1.6Cu+5.5Al?60(C+1.2N)1/2+26.3(C+1.2N)(Cr+Mn+Mo)1/2+0.6[Ni(Cr+Mn)]1/2.
    Type: Application
    Filed: December 19, 2014
    Publication date: November 3, 2016
    Inventors: Soon-Gi LEE, In-Shik SUH, Hak-Cheol LEE, In-Gyu PARK
  • Publication number: 20150354037
    Abstract: The present invention relates to a high strength austenitic-based steel with remarkable toughness of a welding heat-affected zone and a preparation method therefor. One embodiment of the present invention provides: a high strength austenitic-based steel with remarkable toughness of a welding heat-affected zone, comprising 0.8-1.5 wt % of C, 15-22 wt % of Mn, 5 wt % or less of Cr (except 0), and the balance of Fe and other inevitable impurities, and further comprising at least one of the following (a) and (b), wherein the microstructure of a welding heat-affected zone comprises 90% or more of austenite by volume fraction; and a preparation method therefor. (a) Mo: 0.1-1% and B: 0.001-0.02% (b) Ti: 0.01-0.3% and N: 0.003-0.
    Type: Application
    Filed: December 24, 2013
    Publication date: December 10, 2015
    Applicant: POSCO
    Inventors: Hak-Cheol LEE, In-Shik SUH, Soon-Gi LEE, In-Gyu PARK, Yong-Jin KIM, Hong-Ju LEE
  • Publication number: 20150322551
    Abstract: A high-manganese wear-resistant steel having excellent weldability comprises 5 to 15 wt % of Mn, 16?33.5C+Mn?30 of C, 0.05 to 1.0 wt % of Si, and a balance of Fe and other inevitable impurities. The microstructure thereof includes martensite as a major component, and 5% to 40% of residual austenite by area fraction.
    Type: Application
    Filed: December 28, 2012
    Publication date: November 12, 2015
    Inventors: Soon-Gi LEE, In-Shik SUH, In-Gyu PARK, Hong-Ju LEE
  • Publication number: 20150020928
    Abstract: Provided are an austenitic steel having excellent machinability and ultra-low temperature toughness in a weld heat-affected zone including 15 wt % to 35 wt % of manganese (Mn), carbon (C) satisfying 23.6C+Mn?28 and 33.5C?Mn?23, 5 wt % or less (excluding 0 wt %) of copper (Cu), chromium (Cr) satisfying 28.5C+4.4Cr?57 (excluding 0 wt %), and iron (Fe) as well as other unavoidable impurities as a remainder, wherein a Charpy impact value of a weld heat-affected zone at ?196° C. is 41 J or more, and a method of manufacturing the steel. According to the present invention, a low-cost ultra-low temperature steel may be obtained, a stable austenite phase may be formed at low temperature, carbide formation may be effectively suppressed, and a structural steel having excellent machinability and ultra-low temperature toughness in a weld heat-affected zone may be provided.
    Type: Application
    Filed: December 27, 2012
    Publication date: January 22, 2015
    Inventors: Soon-Gi Lee, Jong-Kyo Choi, Young-Hwan Park, Hee-Goon Noh, Hyun-Kwan Cho, In-Shik Suh, In-Gyu Park, Hong-Ju Lee
  • Publication number: 20140373588
    Abstract: There are provided a wear resistant austenitic steel having superior machinability and toughness in weld heat affected zones and a method for producing the austenitic steel. The austenitic steel includes, by weight %, manganese (Mn): 15% to 25%, carbon (C): 0.8% to 1.8%, copper (Cu) satisfying 0.7C-0.56(%)?Cu?5%, and the balance of iron (Fe) and inevitable impurities, wherein the weld heat affected zones have a Charpy impact value of 100 J or greater at ?40° C. The toughness of the austenitic steel is not decreased in weld heat affected zones because the formation of carbides during welding is suppressed, and the machinability of the austenitic steel is improved so that a cutting process may be easily performed on the austenitic steel. The corrosion resistance of the austenitic steel is improved so that the austenitic steel may be used for an extended period of time in corrosive environments.
    Type: Application
    Filed: December 27, 2012
    Publication date: December 25, 2014
    Inventors: Soon-Gi Lee, Jong-Kyo Choi, Hee-Goon Noh, Hong-Ju Lee, In-Shik Suh, In-Gyu Park
  • Publication number: 20140356220
    Abstract: There are provided a wear resistant austenitic steel having superior machinability and toughness in weld heat affected zones and a method for producing the austenitic steel. The austenitic steel includes, by weight %, manganese (Mn): 15% to 25%, carbon (C): 0.8% to 1.8%, copper (Cu) satisfying 0.7C-0.56(%)?Cu?5%, and the balance of iron (Fe) and inevitable impurities, wherein the weld heat affected zones have a Charpy impact value of 100 J or greater at ?40° C. The toughness of the austenitic steel is not decreased in weld heat affected zones because the formation of carbides during welding is suppressed, and the machinability of the austenitic steel is improved so that a cutting process may be easily performed on the austenitic steel. The corrosion resistance of the austenitic steel is improved so that the austenitic steel may be used for an extended period of time in corrosive environments.
    Type: Application
    Filed: December 27, 2012
    Publication date: December 4, 2014
    Inventors: Soon-Gi Lee, Jong-Kyo Choi, Hee-Goon Noh, Hyun-Kwan Cho, In-Shik Suh, Hak-Cheol Lee, In-Gyu Park, Hong-Ju Lee
  • Publication number: 20120288396
    Abstract: Provided is an austenite steel having excellent ductility including 8 wt % to 15 wt % of manganese (Mn), 3 wt % or less (excluding 0 wt %) of copper (Cu), a content of carbon (C) satisfying relationships of 33.5C+Mn?25 and 33.5C?Mn?23, and iron (Fe) as well as unavoidable impurities as a remainder. According to an aspect, austenite is stabilized and generation of carbides in a network form at austenite grain boundaries is inhibited by adding copper (Cu) favorable to inhibition of carbide formation with respect to manganese and appropriately controlling contents of carbon and manganese, and thus, high economic efficiency may also be achieved while ductility and wear resistance are improved.
    Type: Application
    Filed: December 28, 2010
    Publication date: November 15, 2012
    Applicant: POSCO
    Inventors: Soon-Gi Lee, Jong-Kyo Choi, Hyun-Kwan Cho, Hee-Goon Noh