Patents by Inventor Changheui JANG

Changheui JANG 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).

  • High-strength Fe—Cr—Ni—Al multiplex stainless steel and manufacturing method therefor
    Patent number: 11649517
    Abstract: The present disclosure relates to a high-strength Fe—Cr—Al—Ni multiplex stainless steel and a manufacturing method therefor. The multiplex stainless steel comprises 35 to 67 wt % of iron (Fe), 13 to 30 wt % of chrome (Cr), 15 to 30 wt % of nickel (Ni), and 5 to 15 wt % of aluminum (Al) and has a multiplex structure in which an austenite phase accounting for high ductility, a ferrite phase accounting for high strength, and an NiAl(B2) phase providing both strength and high-temperature steam oxidation resistance, exist in combination.
    Type: Grant
    Filed: September 20, 2017
    Date of Patent: May 16, 2023
    Assignee: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Changheui Jang, Hyunmyung Kim, Gokul Obulan Subramanian, Jin Woo Heo, Ho Jung Lee, Sunghoon Hong, Chaewon Kim
  • AUSTENITIC STAINLESS STEEL HAVING A LARGE AMOUNT OF UNIFROMLY DISTRIBUTED NANOMETER-SIZED PRECIPITATES AND PREPARING METHOD OF THE SAME
    Publication number: 20230117314
    Abstract: Austenitic stainless steel includes 16 to 26 wt % of chromium (Cr), 8 to 22 wt % of nickel (Ni), 0.02 to 0.1 wt % of carbon (C), 0.2 to 1 wt % of niobium (Nb), and 2 to 3.5 wt % of manganese (Mn), and has an austenite matrix, wherein a nanosized niobium carbide (NbC) is precipitated in the austenite matrix, and the nanosized niobium carbide is uniformly dispersed in the austenite matrix. The austenitic stainless steel may further include 0.5 to 1.5 wt % of molybdenum (Mo).
    Type: Application
    Filed: December 6, 2019
    Publication date: April 20, 2023
    Inventors: Changheui JANG, Jiho SHIN, Byeong Seo KONG, Hyeon Bae LEE, Chaewon JEONG, Hyun Woo KOO
  • Ferritic alloy and method of manufacturing nuclear fuel cladding tube using the same
    Patent number: 11603584
    Abstract: Embodiments of the disclosure relate to a ferritic alloy having excellent ability to withstand nuclear power plant accidents and a method of manufacturing a nuclear fuel cladding tube using the same. The alloy includes iron (Fe), aluminum (Al), chromium (Cr), and nickel (Ni). The nickel (Ni) may be included 0.5 to 10 wt % based on a total amount of the alloy. The chromium may be included 13 to 18 wt % based on the total amount of the alloy. The aluminum may be included 5 to 7 wt % based on the total amount of the alloy.
    Type: Grant
    Filed: February 24, 2020
    Date of Patent: March 14, 2023
    Assignees: KEPCO NUCLEAR FUEL CO., LTD., KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Sung Yong Lee, Hun Jang, Seung Jae Lee, Yoon Ho Kim, Dae Gyun Ko, Changheui Jang, Chaewon Kim, Hyunmyung Kim
  • FERRITIC ALLOY AND METHOD OF MANUFACTURING NUCLEAR FUEL CLADDING TUBE USING THE SAME
    Publication number: 20210189534
    Abstract: Embodiments of the disclosure relate to a ferritic alloy having excellent ability to withstand nuclear power plant accidents and a method of manufacturing a nuclear fuel cladding tube using the same. The alloy includes iron (Fe), aluminum (Al), chromium (Cr), and nickel (Ni). The nickel (Ni) may be included 0.5 to 10 wt % based on a total amount of the alloy. The chromium may be included 13 to 18 wt % based on the total amount of the alloy. The aluminum may be included 5 to 7 wt % based on the total amount of the alloy.
    Type: Application
    Filed: February 24, 2020
    Publication date: June 24, 2021
    Applicants: KEPCO NUCLEAR FUEL CO., LTD., KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Sung Yong Lee, Hun Jang, Seung Jae Lee, Yoon Ho Kim, Dae Gyun Ko, Changheui Jang, Chaewon Kim, Hyunmyung Kim
  • HIGH-STRENGTH Fe-Cr-Ni-Al MULTIPLEX STAINLESS STEEL AND MANUFACTURING METHOD THEREFOR
    Publication number: 20200056257
    Abstract: The present disclosure relates to a high-strength Fe—Cr—Al—Ni multiplex stainless steel and a manufacturing method therefor. The multiplex stainless steel comprises 35 to 67 wt % of iron (Fe), 13 to 30 wt % of chrome (Cr), 15 to 30 wt % of nickel (Ni), and 5 to 15 wt % of aluminum (Al) and has a multiplex structure in which an austenite phase accounting for high ductility, a ferrite phase accounting for high strength, and an NiAl(B2) phase providing both strength and high-temperature steam oxidation resistance, exist in combination.
    Type: Application
    Filed: September 20, 2017
    Publication date: February 20, 2020
    Applicant: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Changheui JANG, Hyunmyung KIM, Gokul Obulan SUBRAMANIAN, Jin Woo HEO, Ho Jung LEE, Sunghoon HONG, Chaewon KIM