Patents by Inventor Weizhong Han

Weizhong Han 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).

  • Surface treatment method of metallic materials
    Patent number: 11384408
    Abstract: A surface treatment method of metallic materials provided by the present invention includes steps of: (S1) cleaning a surface of an initial metallic material to be treated, and then drying; and (S2) placing the dried metallic material in a heating furnace, adjusting a vacuum degree inside the heating furnace to a preset value under the protection of a mixed flowing gas of oxygen and an inert gas, heating and preserving, cooling to room temperature by furnace cooling, and completing the surface treatment of the metallic material to be treated, wherein the heating temperature is larger than the destruction temperature of the native oxide at the surface of the initial metallic material. The present invention is able to increase the surface hardness of the metallic material within a large depth, and has the advantages of low processing cost, high efficiency, good controllability, convenient operation and low surface contamination for the workpiece.
    Type: Grant
    Filed: June 28, 2019
    Date of Patent: July 12, 2022
    Assignee: XI'AN JIAOTONG UNIVERSITY
    Inventors: Weizhong Han, Pingjiong Yang
  • Surface treatment method of metallic materials
    Publication number: 20190323102
    Abstract: A surface treatment method of metallic materials provided by the present invention includes steps of: (S1) cleaning a surface of an initial metallic material to be treated, and then drying; and (S2) placing the dried metallic material in a heating furnace, adjusting a vacuum degree inside the heating furnace to a preset value under the protection of a mixed flowing gas of oxygen and an inert gas, heating and preserving, cooling to room temperature by furnace cooling, and completing the surface treatment of the metallic material to be treated, wherein the heating temperature is larger than the destruction temperature of the native oxide at the surface of the initial metallic material. The present invention is able to increase the surface hardness of the metallic material within a large depth, and has the advantages of low processing cost, high efficiency, good controllability, convenient operation and low surface contamination for the workpiece.
    Type: Application
    Filed: June 28, 2019
    Publication date: October 24, 2019
    Inventors: Weizhong Han, Pingjiong Yang