Patents by Inventor Chang-dong LIM

Chang-dong LIM 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).

  • Crystal grain refiner for magnesium alloy, containing aluminum, a method for preparing magnesium alloy, and magnesium alloy manufactured by same method
    Patent number: 10266916
    Abstract: A grain refiner for a magnesium alloy according to the present invention contains aluminum (Al) and manganese (Mn), and contains a compound of aluminum (Al) and manganese (Mn) in the microstructure thereof, wherein the grain refiner is composed of a structure in which, in the compound of aluminum (Al) and manganese (Mn), the area of the compound having an Al/Mn compositional (atomic) ratio of 4-4.5 is larger than the area of the compound having an Al/Mn compositional (atomic) ratio of 5.5-6.5. When the grain refiner is added to molten magnesium, crystal grains can be refined to 50-100 ?m.
    Type: Grant
    Filed: April 6, 2015
    Date of Patent: April 23, 2019
    Assignee: KOREA INSTITUTE OF MACHINERY & MATERIALS
    Inventors: Jun-ho Bae, Bong-sun You, Young-min Kim, Ha-sik Kim, Chang-dong Lim, Byeong-gi Moon, Sung-hyuk Park
  • CRYSTAL GRAIN REFINER FOR MAGNESIUM ALLOY, CONTAINING ALUMINUM, A METHOD FOR PREPARING MAGNESIUM ALLOY, AND MAGNESIUM ALLOY MANUFACTURED BY SAME METHOD
    Publication number: 20170016089
    Abstract: A grain refiner for a magnesium alloy according to the present invention contains aluminum (Al) and manganese (Mn), and contains a compound of aluminum (Al) and manganese (Mn) in the microstructure thereof, wherein the grain refiner is composed of a structure in which, in the compound of aluminum (Al) and manganese (Mn), the area of the compound having an Al/Mn compositional (atomic) ratio of 4-4.5 is larger than the area of the compound having an Al/Mn compositional (atomic) ratio of 5.5-6.5. When the grain refiner is added to molten magnesium, crystal grains can be refined to 50-100 ?m.
    Type: Application
    Filed: April 6, 2015
    Publication date: January 19, 2017
    Inventors: Jun-ho BAE, Bong-sun YOU, Young-min KIM, Ha-sik KIM, Chang-dong LIM, Byeong-gi MOON, Sung-hyuk PARK