Patents by Inventor Bae Jong-Su

Bae Jong-Su 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).

  • Method for manufacturing vanadium carbide powder added tool steel powder by milling process, and method for manufacturing parts therewith
    Patent number: 5561832
    Abstract: A tool steel powder added with a vanadium carbide powder by a milling process, and a method for manufacturing parts therewith are disclosed. Particularly, a method for adding a vanadium carbide (VC) powder to a tool steel powder by a ball milling or an attrition milling, and a method for manufacturing a part by using the milled tool steel powder are disclosed. The method for manufacturing a vanadium carbide added tool steel powder and for manufacturing parts using the powder, includes the steps of: mixing a tool steel powder with vanadium carbide powder in an amount of 5.about.15 wt %; ball-milling the mixture powder under wet atmosphere; carrying out an annealing in a vacuum; carrying out a cold die compaction or cold isostatic pressing to near net dimension and carrying out a vacuum sintering and then a hot isotropic pressing without canning.
    Type: Grant
    Filed: June 29, 1995
    Date of Patent: October 1, 1996
    Assignee: Korea Institute of Machinery & Metals
    Inventors: Chung Hyung-Sik, Bae Jong-Su, Kim Young-Jin