Patents by Inventor Qingjun Zheng

Qingjun Zheng 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: 10428406
    Abstract: Cobalt-based alloy compositions are described herein having properties compatible with thermal spray and sintering techniques. Such alloy compositions can provide claddings to a variety of metallic substrates having complex geometries, wherein the claddings exhibit desirable density, hardness, wear resistance and corrosion resistance. Briefly, an alloy composition described herein comprises 15-25 wt. % chromium, 15-20 wt. % molybdenum, 0-15 wt. % tungsten, 10-20 wt. % nickel, 2.5-3.5 wt. % boron, 2.5-4.5 wt. % silicon, 1-2 wt. % carbon and the balance cobalt, wherein a ratio of boron to silicon (B/Si) in the alloy composition ranges from 0.5 to 1.0.
    Type: Grant
    Filed: February 6, 2017
    Date of Patent: October 1, 2019
    Assignee: KENNAMETAL INC.
    Inventors: Matthew Yao, Abdelhakim Belhadjhamida, David A. Lee, Qingjun Zheng
  • Patent number: 10391557
    Abstract: In one aspect, composite articles are described herein employing cobalt-based alloy claddings exhibiting high hardness and wear resistance while maintaining desirable integrity and adhesion to surfaces of metallic substrates. A composite article, in some embodiments, comprises a metallic substrate and a composite cladding metallurgically bonded to one or more surfaces of the metallic substrate, the composite cladding including cobalt-based alloy having a chromium gradient, wherein chromium content increases in a direction from the composite cladding surface to an interface of the composite cladding with the metallic substrate.
    Type: Grant
    Filed: May 26, 2016
    Date of Patent: August 27, 2019
    Assignee: KENNAMETAL INC.
    Inventors: James A. Faust, Daniel Bourlotos, Qingjun Zheng, Michael Meyer
  • Patent number: 10280035
    Abstract: A power paying-off cradle consisting of power paying-off component and framework. In the framework is a cavity with an upper opening; a wire tension balance mechanism is installed in the cavity; a displacement wheel is installed on the wire tension balance mechanism, and a position detector of the displacement wheel is installed on the inner side wall of the framework; a turning wheel is installed on the front top of the framework; a thread hole is installed in the front of the framework; wire on the paying-off spool enwinds the turning wheel and the displacement wheel successively and passes through the thread hole. The wire tension balance mechanism has damping effect on the displacement wheel. When the tension of the displacement wheel is greater than or less than the damping force, the displacement wheel moves in order to ensure consistency of the tension or the strain of wire.
    Type: Grant
    Filed: May 24, 2017
    Date of Patent: May 7, 2019
    Inventor: Qingjun Zheng
  • 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: 10221702
    Abstract: A method of imparting wear-resistance to a contact face of a turbine blade Z-notch comprising applying a flexible cladding sheet comprising a Co-based cladding alloy and an organic binder to the contact face of the Z-notch, heating the turbine blade Z-notch with flexible cladding sheet thereon to volatilize the organic binder and remove it from the cladding sheet, and further heating the turbine blade Z-notch with flexible cladding sheet thereon to sinter the cladding sheet by liquid phase sintering, thereby cladding the cladding sheet to the contact face to produce a wear-resistant layer thereon.
    Type: Grant
    Filed: February 23, 2015
    Date of Patent: March 5, 2019
    Assignee: KENNAMETAL INC.
    Inventors: Joel T. Dawson, Danie DeWet, Qingjun Zheng
  • Publication number: 20180304420
    Abstract: Methods of superalloy article repair are provided. In some embodiments, a method for repairing a nickel-based superalloy article comprises providing a layered assembly over a damaged region of the nickel-based superalloy article, the layered assembly comprising a nickel-based superalloy preform, an infiltration alloy preform and a melting point depressant component. The layered assembly is heated to form a nickel-based filler alloy metallurgically bonded to the damaged region, wherein primary carbide and secondary carbide phases are present in the nickel-based filler alloy in a combined amount of 0.5 to 10 vol. %.
    Type: Application
    Filed: April 20, 2017
    Publication date: October 25, 2018
    Inventors: Qingjun ZHENG, Michael MEYER, Martin G. PEREZ, Abdelhakim BELHADJHAMIDA
  • Publication number: 20180294077
    Abstract: A power paying-off cradle consisting of power paying-off component and framework. In the framework is a cavity with an upper opening; a wire tension balance mechanism is installed in the cavity; a displacement wheel is installed on the wire tension balance mechanism, and a position detector of the displacement wheel is installed on the inner side wall of the framework; a turning wheel is installed on the front top of the framework; a thread hole is installed in the front of the framework; wire on the paying-off spool enwinds the turning wheel and the displacement wheel successively and passes through the thread hole. The wire tension balance mechanism has damping effect on the displacement wheel. When the tension of the displacement wheel is greater than or less than the damping force, the displacement wheel moves in order to ensure consistency of the tension or the strain of wire.
    Type: Application
    Filed: May 24, 2017
    Publication date: October 11, 2018
    Inventor: Qingjun ZHENG
  • Patent number: 10014096
    Abstract: A horizontal automatic tension taping machine comprises a swing rod buffering tension pay-off rack (1), and the swing rod buffering tension pay-off rack (1), a tension balancing wheel (2), a taping machine (3), a ground wire pay-off machine (4), a next taping machine (5), an oven (6), a next ground wire pay-off machine (7), a next taping machine (8), a next oven (9), a crawler take-up machine (10) and an axial row type wire-winding machine (11) are orderly butted. All the parts (1-11) are connected with, a control cabinet (12).
    Type: Grant
    Filed: September 23, 2014
    Date of Patent: July 3, 2018
    Inventor: Qingjun Zheng
  • 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
  • Patent number: 9849532
    Abstract: A composite wear pad includes a substrate that is selected from the group of iron based alloys, steel, nickel based alloys, and cobalt based alloys. A hard particle-matrix alloy layer is bonded at a surface to the substrate. The hard particle-matrix alloy layer has a plurality of hard particles dispersed in a matrix alloy. The hard particle-matrix alloy layer has a thickness ranging between greater than about 13 millimeters and about 20 millimeters.
    Type: Grant
    Filed: June 12, 2014
    Date of Patent: December 26, 2017
    Assignee: KENNAMETAL INC.
    Inventors: Qingjun Zheng, Robert J. Vasinko, Yixiong Liu
  • Publication number: 20170341148
    Abstract: In one aspect, composite articles are described herein employing cobalt-based alloy claddings exhibiting high hardness and wear resistance while maintaining desirable integrity and adhesion to surfaces of metallic substrates. A composite article, in some embodiments, comprises a metallic substrate and a composite cladding metallurgically bonded to one or more surfaces of the metallic substrate, the composite cladding including cobalt-based alloy having a chromium gradient, wherein chromium content increases in a direction from the composite cladding surface to an interface of the composite cladding with the metallic substrate.
    Type: Application
    Filed: May 26, 2016
    Publication date: November 30, 2017
    Inventors: James A. FAUST, Daniel Bourlotos, Qingjun ZHENG, Michael MEYER
  • Patent number: 9764986
    Abstract: In one aspect, articles employing CVD coatings deposited at low temperatures are described herein. Briefly, a coated article described herein comprises a substrate and a refractory coating adhered to the substrate, the refractory coating including a layer of TiN deposited by thermal CVD, the layer of TiN having an average crystallite size of 0.05 ?m to 0.5 ?m and residual tensile stress of 100 MPa to 700 MPa.
    Type: Grant
    Filed: January 22, 2015
    Date of Patent: September 19, 2017
    Assignee: KENNAMETAL INC.
    Inventors: Zhenyu Liu, Qingjun Zheng, Peter Rudolf Leicht, Yixiong Liu
  • Publication number: 20170233852
    Abstract: Cobalt-based alloy compositions are described herein having properties compatible with thermal spray and sintering techniques. Such alloy compositions can provide claddings to a variety of metallic substrates having complex geometries, wherein the claddings exhibit desirable density, hardness, wear resistance and corrosion resistance. Briefly, an alloy composition described herein comprises 15-25 wt. % chromium, 15-20 wt. % molybdenum, 0-15 wt. % tungsten, 10-20 wt. % nickel, 2.5-3.5 wt. % boron, 2.5-4.5 wt. % silicon, 1-2 wt. % carbon and the balance cobalt, wherein a ratio of boron to silicon (B/Si) in the alloy composition ranges from 0.5 to 1.0.
    Type: Application
    Filed: February 6, 2017
    Publication date: August 17, 2017
    Inventors: Matthew YAO, Abdelhakim BELHADJHAMIDA, David A. LEE, Qingjun ZHENG
  • 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: 20160343477
    Abstract: A horizontal automatic tension taping machine comprises a swing rod buffering tension pay-off rack (1), and the swing rod buffering tension pay-off rack (1), a tension balancing wheel (2) a taping machine (3) a ground wire pay-off machine (4), a next taping machine (5), an oven (6), a next ground wire pay-off machine (7), a next taping machine (8), a next oven (9), a crawler take-up machine (10) and an axial row type wire-winding machine (11) are orderly butted. All the parts (1-11) are connected with, a control cabinet (12).
    Type: Application
    Filed: September 23, 2014
    Publication date: November 24, 2016
    Inventor: Qingjun ZHENG
  • Patent number: 9499888
    Abstract: Carbide pellets including relatively small amounts of metallic binder are produced by steps of pressing, comminuting, shaping and sintering. The carbide pellets may be used as wear resistant hard facing materials that are applied to various types of tools. The carbide pellets provide improved mechanical properties such as hardness and abrasiveness while maintaining required levels of toughness and strength.
    Type: Grant
    Filed: August 13, 2014
    Date of Patent: November 22, 2016
    Assignee: KENNAMETAL INC.
    Inventors: Terry W. Kirk, Hongbo Tian, Xin Deng, Debangshu Banerjee, Qingjun Zheng
  • Publication number: 20160245099
    Abstract: A method of imparting wear-resistance to a contact face of a turbine blade Z-notch comprising applying a flexible cladding sheet comprising a Co-based cladding alloy and an organic binder to the contact face of the Z-notch, heating the turbine blade Z-notch with flexible cladding sheet thereon to volatilize the organic binder and remove it from the cladding sheet, and further heating the turbine blade Z-notch with flexible cladding sheet thereon to sinter the cladding sheet by liquid phase sintering, thereby cladding the cladding sheet to the contact face to produce a wear-resistant layer thereon.
    Type: Application
    Filed: February 23, 2015
    Publication date: August 25, 2016
    Applicant: KENNAMETAL INC.
    Inventors: Joel T. Dawson, Danie DeWet, Qingjun Zheng
  • Publication number: 20160215387
    Abstract: In one aspect, articles employing CVD coatings deposited at low temperatures are described herein. Briefly, a coated article described herein comprises a substrate and a refractory coating adhered to the substrate, the refractory coating including a layer of TiN deposited by thermal CVD, the layer of TiN having an average crystallite size of 0.05 ?m to 0.5 ?m and residual tensile stress of 100 MPa to 700 MPa.
    Type: Application
    Filed: January 22, 2015
    Publication date: July 28, 2016
    Inventors: Zhenyu LIU, Qingjun Zheng, Peter Rudolf Leicht, Yixiong Liu
  • 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