Patents by Inventor Wei-Hua Lu

Wei-Hua Lu 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).

  • Process for nodulizing silicon in casting aluminum silicon alloys
    Publication number: 20020000273
    Abstract: A method for nodulizing silicon crystals in casting Aluminum-(8-12%)-Silicon alloys is described. An initial alloy melt is refined by addition of a master alloy containing elements of titanium, phosphorous, boron, zirconium and rare earths to the initial molten alloy, and then through conventional heat treatment and aging. Testing the alloys shows that the nodulized silicon crystals are blunted in shape and well distributed, resulting in a high resistance to wear and high ultimate tensile strength at room temperature and at 300° C. Machinability of the Al—Si alloys is also greatly improved by the process.
    Type: Application
    Filed: May 14, 2001
    Publication date: January 3, 2002
    Inventors: Ru-Yao Wang, Wei-Hua Lu
  • Process for nodulizing silicon in casting aluminum silicon alloys
    Patent number: 6261390
    Abstract: A method for nodulizing silicon crystals in casting Aluminum-(8-12%)Silicon alloys is described. An initial alloy melt is refined by addition of a master alloy containing elements of titanium, phosphorous, boron, zirconium and rare earths to the initial molten alloy, and then through conventional heat treatment and aging. Testing the alloys shows that the nodulized silicon crystals are blunted in shape and well distributed, resulting in a high resistance to wear and high ultimate tensile strength at room temperature and at 300 deg. C. Machinability of the Al-Si alloys is also greatly improved by the process.
    Type: Grant
    Filed: May 15, 2000
    Date of Patent: July 17, 2001
    Inventors: Hsien-Yang Yeh, Hen-Geul Yeh, Ru-Yao Wang, Wei-Hua Lu