Patents by Inventor Danie J. De Wet

Danie J. De Wet 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).

  • Patent number: 10562101
    Abstract: In one aspect, methods of making freestanding metal matrix composite articles and alloy articles are described. A method of making a freestanding composite article described herein comprises disposing over a surface of the temporary substrate a layered assembly comprising a layer of infiltration metal or alloy and a hard particle layer formed of a flexible sheet comprising organic binder and the hard particles. The layered assembly is heated to infiltrate the hard particle layer with metal or alloy providing a metal matrix composite, and the metal matrix composite is separated from the temporary substrate. Further, a method of making a freestanding alloy article described herein comprises disposing over the surface of a temporary substrate a flexible sheet comprising organic binder and powder alloy and heating the sheet to provide a sintered alloy article. The sintered alloy article is then separated from the temporary substrate.
    Type: Grant
    Filed: January 24, 2017
    Date of Patent: February 18, 2020
    Assignee: KENNAMETAL INC.
    Inventors: Qingjun Zheng, Yixiong Liu, James A. Faust, Mark J. Rowe, Danie J. De Wet, Sudharsan Subbaiyan, Michael J. Meyer
  • Patent number: 10272497
    Abstract: In one aspect, methods of making cladded articles are described herein. A method of making a cladded article, in some embodiments, comprises disposing over a surface of a metallic substrate a sheet comprising organic binder and powder metal or powder alloy having a solidus temperature at least 100° C. less than the metallic substrate and heating the powder metal or powder alloy to provide a sintered metal or sintered alloy cladding metallurgically bonded to the metallic substrate.
    Type: Grant
    Filed: March 17, 2016
    Date of Patent: April 30, 2019
    Assignee: KENNAMETAL INC.
    Inventors: Qingjun Zheng, Yixiong Liu, James A. Faust, Danie J. De Wet, Sudharsan Subbaiyan, Piyamanee Komolwit, Mark J. Rowe
  • Patent number: 9862029
    Abstract: In one aspect, methods of making freestanding metal matrix composite articles and alloy articles are described. A method of making a freestanding composite article described herein comprises disposing over a surface of the temporary substrate a layered assembly comprising a layer of infiltration metal or alloy and a hard particle layer formed of a flexible sheet comprising organic binder and the hard particles. The layered assembly is heated to infiltrate the hard particle layer with metal or alloy providing a metal matrix composite, and the metal matrix composite is separated from the temporary substrate. Further, a method of making a freestanding alloy article described herein comprises disposing over the surface of a temporary substrate a flexible sheet comprising organic binder and powder alloy and heating the sheet to provide a sintered alloy article. The sintered alloy article is then separated from the temporary substrate.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: January 9, 2018
    Assignee: KENNAMETAL INC
    Inventors: Qingjun Zheng, Yixiong Liu, James A Faust, Mark J Rowe, Danie J De Wet, Sudharsan Subbaiyan, Michael J Meyer
  • Publication number: 20170129015
    Abstract: In one aspect, methods of making freestanding metal matrix composite articles and alloy articles are described. A method of making a freestanding composite article described herein comprises disposing over a surface of the temporary substrate a layered assembly comprising a layer of infiltration metal or alloy and a hard particle layer formed of a flexible sheet comprising organic binder and the hard particles. The layered assembly is heated to infiltrate the hard particle layer with metal or alloy providing a metal matrix composite, and the metal matrix composite is separated from the temporary substrate. Further, a method of making a freestanding alloy article described herein comprises disposing over the surface of a temporary substrate a flexible sheet comprising organic binder and powder alloy and heating the sheet to provide a sintered alloy article. The sintered alloy article is then separated from the temporary substrate.
    Type: Application
    Filed: January 24, 2017
    Publication date: May 11, 2017
    Inventors: Qingjun ZHENG, Yixiong LIU, James A. FAUST, Mark J. ROWE, Danie J. DE WET, Sudharsan SUBBAIYAN, Michael J. MEYER
  • Publication number: 20160193660
    Abstract: In one aspect, methods of making cladded articles are described herein. A method of making a cladded article, in some embodiments, comprises disposing over a surface of a metallic substrate a sheet comprising organic binder and powder metal or powder alloy having a solidus temperature at least 100° C. less than the metallic substrate and heating the powder metal or powder alloy to provide a sintered metal or sintered alloy cladding metallurgically bonded to the metallic substrate.
    Type: Application
    Filed: March 17, 2016
    Publication date: July 7, 2016
    Inventors: Qingjun ZHENG, Yixiong Liu, James A. Faust, Danie J. De Wet, Sudharsan Subbaiyan, Piyamanee Komolwit, Mark J. Rowe
  • Patent number: 9346101
    Abstract: In one aspect, methods of making cladded articles are described herein. A method of making a cladded article, in some embodiments, comprises disposing over a surface of a metallic substrate a sheet comprising organic binder and powder metal or powder alloy having a solidus temperature at least 100° C. less than the metallic substrate and heating the powder metal or powder alloy to provide a sintered metal or sintered alloy cladding metallurgically bonded to the metallic substrate.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: May 24, 2016
    Assignee: KENNAMETAL INC.
    Inventors: Qingjun Zheng, Yixiong Liu, James A Faust, Danie J De Wet, Sudharsan Subbaiyan, Piyamanee Komolwit, Mark J Rowe
  • Publication number: 20140271318
    Abstract: In one aspect, methods of making freestanding metal matrix composite articles and alloy articles are described. A method of making a freestanding composite article described herein comprises disposing over a surface of the temporary substrate a layered assembly comprising a layer of infiltration metal or alloy and a hard particle layer formed of a flexible sheet comprising organic binder and the hard particles. The layered assembly is heated to infiltrate the hard particle layer with metal or alloy providing a metal matrix composite, and the metal matrix composite is separated from the temporary substrate. Further, a method of making a freestanding alloy article described herein comprises disposing over the surface of a temporary substrate a flexible sheet comprising organic binder and powder alloy and heating the sheet to provide a sintered alloy article. The sintered alloy article is then separated from the temporary substrate.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Applicant: Kennametal Inc.
    Inventors: Qingjun Zheng, Yixiong Liu, James A. Faust, Mark J. Rowe, Danie J. De Wet, Sudharsan Subbaiyan, Michael J. Meyer
  • Publication number: 20140271319
    Abstract: In one aspect, methods of making cladded articles are described herein. A method of making a cladded article, in some embodiments, comprises disposing over a surface of a metallic substrate a sheet comprising organic binder and powder metal or powder alloy having a solidus temperature at least 100° C. less than the metallic substrate and heating the powder metal or powder alloy to provide a sintered metal or sintered alloy cladding metallurgically bonded to the metallic substrate.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Applicant: Kennametal Inc.
    Inventors: Qingjun Zheng, Yixiong Liu, James A. Faust, Danie J. De Wet, Sudharsan Subbaiyan, Piyamanee Komolwit, Mark J. Rowe