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).

  • Publication number: 20230264405
    Abstract: The present invention relates to the technical field of wire-rod production equipment, in particular relates to an automatic production line for conductive tape and a manufacturing method for conductive tape, Automatic production of conductive tape brings about high production efficiency and low cost; it not only conducts pretreatment and corresponding detections of the conductors in the production process but also conducts follow-up treatment and corresponding detections of the conductive tape and thus improves the production quality of the conductive tape; in addition, it marks the abnormality position of the conductive tape which is abnormal during the withstand voltage detection so that the operator can accurately find out the abnormal section of the conductive tape.
    Type: Application
    Filed: November 22, 2022
    Publication date: August 24, 2023
    Inventors: Qingjun ZHENG, Shanjun ZHANG, Shubin LIN
  • Patent number: 11376817
    Abstract: Wear resistant articles are described herein which, in some embodiments, mitigate CTE differences between wear resistant components and metallic substrates. In one aspect, an article comprises a layer of sintered cemented carbide bonded to a layer of iron-based alloy via a metal-matrix composite bonding layer, wherein coefficients of thermal expansion (CTE) of the sintered cemented carbide layer, metal matrix composite bonding layer, and iron-based alloy layer satisfy the relation: x = ( ? C ? ? T ? ? E ? ? WC - C ? ? T ? ? E ? ? M ? ? M ? ? C ? ) ( ? C ? ? T ? ? E ? ? M ? ? M ? ? C - C ? ? T ? ? E ? ? Fe ? ) wherein 0.5?x?2 and CTE WC, CTE MMC and CTE Fe are the CTE values for the sintered cemented carbide, metal matrix composite, and iron-based alloy in 1/K respectively at 900° C. to 1100° C.
    Type: Grant
    Filed: July 17, 2020
    Date of Patent: July 5, 2022
    Assignee: KENNAMETAL INC.
    Inventors: Martin G. Perez, Michael J. Meyer, Qingjun Zheng
  • Patent number: 11371348
    Abstract: The application discloses a pipeline annular self-traveling guide apparatus and a pipeline annular self-traveling guiding method. The pipeline annular self-traveling guide apparatus includes an inner annular groove and an outer annular groove. A first pipeline fixing part is configured on the inner annular groove, a second pipeline fixing part is configured on the outer annular groove, an annular bracket which is configured to rotate freely along a circumferential direction is correspondingly configured between the inner annular groove and the outer annular groove, a pipeline supporting roller group is configured on the annular bracket, and gaps for laying pipelines are reserved between a circumferential surface of the pipeline supporting roller and inner bottom surfaces of the inner annular groove and the outer annular groove.
    Type: Grant
    Filed: July 8, 2021
    Date of Patent: June 28, 2022
    Assignees: CHINA RAILWAY TUNNEL GROUP CO., LTD., CHINA RAILWAY TUNNEL STOCK CO., LTD.
    Inventors: Yanwei Zhang, Xinpeng Hu, Feng Li, Li Huang, Guohong Ren, Dabing Che, Wenjuan Wu, Qingjun Zheng, Wenhuan Cao, Bin Chen, Yukai Luo, Xiaoli Li, Renyu Wen
  • Patent number: 11247268
    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: February 6, 2020
    Date of Patent: February 15, 2022
    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: 20210332702
    Abstract: The application discloses a pipeline annular self-traveling guide apparatus and a pipeline annular self-traveling guiding method. The pipeline annular self-traveling guide apparatus includes an inner annular groove and an outer annular groove. A first pipeline fixing part is configured on the inner annular groove, a second pipeline fixing part is configured on the outer annular groove, an annular bracket which is configured to rotate freely along a circumferential direction is correspondingly configured between the inner annular groove and the outer annular groove, a pipeline supporting roller group is configured on the annular bracket, and gaps for laying pipelines are reserved between a circumferential surface of the pipeline supporting roller and inner bottom surfaces of the inner annular groove and the outer annular groove.
    Type: Application
    Filed: July 8, 2021
    Publication date: October 28, 2021
    Inventors: Yanwei ZHANG, Xinpeng HU, Feng LI, Li HUANG, Guohong REN, Dabing CHE, Wenjuan WU, Qingjun ZHENG, Wenhuan CAO, Bin CHEN, Yukai LUO, Xiaoli LI, Renyu WEN
  • Patent number: 11000921
    Abstract: Welding rods and associated cladded articles are described herein. Briefly, a welding rod comprises a hard particle component dispersed in a nickel-based alloy matrix or cobalt-based alloy matrix, the hard particle component comprising tungsten carbide particles having an average size of less than 45 ?m, and the nickel-based alloy matrix or the cobalt-based alloy matrix comprising at least one metal carbide forming element.
    Type: Grant
    Filed: April 26, 2019
    Date of Patent: May 11, 2021
    Assignee: KENNAMETAL INC.
    Inventors: Qingjun Zheng, Robert J. Vasinko
  • Publication number: 20210105888
    Abstract: In one aspect, nozzles for arc torches are described herein comprising refractory coatings for increasing nozzle operational lifetimes via resistance to weld splatter and the associated accumulation of molten metal deposits. In one aspect, a nozzle for an arc torch comprises a first body including a central bore and an exterior surface. A coating is adhered to the exterior surface by thermal spray, physical vapor deposition (PVD), or chemical vapor deposition (CVD), the coating comprising a refractory layer including one or more metallic elements selected from the group consisting of aluminum, silicon and metallic elements of Groups IIIB-VIIIB of the Periodic Table and one or more non-metallic elements selected from Groups IIIA, IVA, VA, and VIA of the Periodic Table.
    Type: Application
    Filed: October 4, 2019
    Publication date: April 8, 2021
    Inventors: Robert J. VASINKO, Qingjun ZHENG, Corinne CHARLTON, Joern KOHLSCHEEN
  • Patent number: 10967466
    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: Grant
    Filed: April 20, 2017
    Date of Patent: April 6, 2021
    Assignee: KENNAMETAL INC.
    Inventors: Qingjun Zheng, Michael Meyer, Martin G. Perez, Abdelhakim Belhadjhamida
  • Publication number: 20210031492
    Abstract: Wear resistant articles are described herein which, in some embodiments, mitigate CTE differences between wear resistant components and metallic substrates. In one aspect, an article comprises a layer of sintered cemented carbide bonded to a layer of iron-based alloy via a metal-matrix composite bonding layer, wherein coefficients of thermal expansion (CTE) of the sintered cemented carbide layer, metal matrix composite bonding layer, and iron-based alloy layer satisfy the relation: x = ( ? C ? ? T ? ? E ? ? WC - C ? ? T ? ? E ? ? M ? ? M ? ? C ? ) ( ? C ? ? T ? ? E ? ? M ? ? M ? ? C - C ? ? T ? ? E ? ? Fe ? ) wherein 0.5?x?2 and CTE WC, CTE MMC and CTE Fe are the CTE values for the sintered cemented carbide, metal matrix composite, and iron-based alloy in 1/K respectively at 900° C. to 1100° C.
    Type: Application
    Filed: July 17, 2020
    Publication date: February 4, 2021
    Inventors: Martin G. PEREZ, Michael J. MEYER, Qingjun ZHENG
  • Publication number: 20200384733
    Abstract: In one aspect, articles are described herein comprising composite claddings which, in some embodiments, demonstrate desirable properties including thermal conductivity, transverse rupture strength, fracture toughness, wear resistance and/or erosion resistance. Briefly, an article described herein comprises a metallic substrate, and a cladding adhered to the metallic substrate, the cladding comprising at least 10 weight percent of sintered cemented carbide pellets dispersed in matrix metal or matrix alloy, the sintered cemented carbide pellets having a spherical shape, spheroidal shape, or a mixture of spherical and spheroidal shapes.
    Type: Application
    Filed: June 4, 2019
    Publication date: December 10, 2020
    Inventors: Qingjun ZHENG, Johnny Martin, James Faust
  • Publication number: 20200384541
    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: February 6, 2020
    Publication date: December 10, 2020
    Inventors: Qingjun ZHENG, Yixiong Liu, James A. Faust, Mark D. Rowe, Danie J. De Wet, Sudharsan Subbaiyan, Michael J. Meyer
  • Publication number: 20200384580
    Abstract: In one aspect, articles are described herein comprising composite claddings which, in some embodiments, demonstrate desirable properties including thermal conductivity, transverse rupture strength, fracture toughness, wear resistance and/or erosion resistance. Briefly, an article described herein comprises a metallic substrate, and a cladding adhered to the metallic substrate, the cladding comprising at least 10 weight percent of sintered cemented carbide pellets dispersed in matrix metal or matrix alloy, the sintered cemented carbide pellets having a spherical shape, spheroidal shape, or a mixture of spherical and spheroidal shapes.
    Type: Application
    Filed: June 14, 2019
    Publication date: December 10, 2020
    Inventors: Qingjun ZHENG, Johnny Martin, James Faust, Jonathan W. Bitler
  • Publication number: 20200338672
    Abstract: Welding rods and associated cladded articles are described herein. Briefly, a welding rod comprises a hard particle component dispersed in a nickel-based alloy matrix or cobalt-based alloy matrix, the hard particle component comprising tungsten carbide particles having an average size of less than 45 ?m, and the nickel-based alloy matrix or the cobalt-based alloy matrix comprising at least one metal carbide forming element.
    Type: Application
    Filed: April 26, 2019
    Publication date: October 29, 2020
    Inventors: Qingjun ZHENG, Robert J. Vasinko
  • 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