Patents by Inventor Yixiong Liu

Yixiong Liu 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: 20150360311
    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: Application
    Filed: June 12, 2014
    Publication date: December 17, 2015
    Applicant: KENNAMETAL INC.
    Inventors: Qingjun Zheng, Robert J. Vasinko, Yixiong Liu
  • Patent number: 9181621
    Abstract: In one aspect, cutting tools are described having coatings adhered thereto which, in some embodiments, can demonstrate desirable wear resistance and increased cutting lifetimes. A coated cutting tool, in some embodiments, comprises a substrate and a coating adhered to the substrate, the coating comprising a polycrystalline layer of TiZrAl2O3.
    Type: Grant
    Filed: March 20, 2014
    Date of Patent: November 10, 2015
    Assignee: KENNAMETAL INC.
    Inventors: Zhenyu Liu, Peter Rudolf Leicht, Rodrigo Alejandro Cooper, Mark S. Greenfield, Yixiong Liu
  • Patent number: 9181620
    Abstract: In one aspect, cutting tools are described having coatings adhered thereto which, in some embodiments, can demonstrate desirable wear resistance and increased cutting lifetimes. A coated cutting tool, in some embodiments, comprises a substrate and a coating adhered to the substrate, the coating comprising at least one Zr doped layer deposited by chemical vapor deposition comprising ZrAl2O3.
    Type: Grant
    Filed: March 20, 2014
    Date of Patent: November 10, 2015
    Assignee: KENNAMETAL INC.
    Inventors: Karl Heinz Wendt, Volkmar Sottke, Peter Rudolf Leicht, Yixiong Liu, Mark S. Greenfield, Hartmut Westphal
  • Patent number: 9168664
    Abstract: In one aspect, coated cutting tools are described herein. In some embodiments, a coated cutting tool comprises a substrate and a refractory layer deposited by PVD adhered to the substrate, the refractory layer comprising M1?xAlxN wherein x?0.4 and M is titanium, chromium or zirconium, the refractory layer having a thickness greater than 5 ?m, hardness of at least 25 GPa and residual compressive stress less than 2.5 GPa.
    Type: Grant
    Filed: August 16, 2013
    Date of Patent: October 27, 2015
    Assignee: KENNAMETAL INC.
    Inventors: Vineet Kumar, Ronald Penich, Peter Leicht, Yixiong Liu
  • Patent number: 9138864
    Abstract: In one aspect, coated cutting tools are described herein. A coated cutting tool described herein comprises a substrate and a coating adhered to the substrate, the coating comprising at least one composite layer deposited by chemical vapor deposition, the composite layer comprising an aluminum oxynitride phase, a metal oxide phase including zirconium oxide, a zirconium sulfur nitride phase and a metal oxynitride phase in addition to the aluminum oxynitride phase, the metal oxynitride phase comprising zirconium oxynitride.
    Type: Grant
    Filed: January 24, 2014
    Date of Patent: September 22, 2015
    Assignee: KENNAMETAL INC.
    Inventors: Karl Heinz Wendt, Volkmar Sottke, Rodrigo Alejandro Cooper, Peter Leicht, Yixiong Liu
  • Patent number: 9103036
    Abstract: Refractory coatings for cutting tool applications and methods of making the same are described herein which, in some embodiments, permit incorporation of increased levels of aluminum into nitride coatings while reducing or maintaining levels of hexagonal phase in such coatings. Coatings and methods described herein, for example, employ cubic phase forming compositions for limiting hexagonal phase in nitride coatings of high aluminum content.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: August 11, 2015
    Assignee: KENNAMETAL INC.
    Inventors: Vineet Kumar, Ronald Penich, Yixiong Liu
  • Patent number: 9017809
    Abstract: In one aspect, cutting tools are described having coatings adhered thereto. A coated cutting tool, in some embodiments, comprises a substrate and a coating adhered to the substrate, the coating comprising at least one composite layer deposited by chemical vapor deposition comprising an aluminum oxynitride phase and a metal oxide phase, the metal oxide phase including at least one oxide of a metallic element selected from Group IVB of the Periodic Table.
    Type: Grant
    Filed: January 25, 2013
    Date of Patent: April 28, 2015
    Assignee: Kennametal Inc.
    Inventors: Volkmar Sottke, Doris Lenk, Hartmut Westphal, Hendrikus Van Den Berg, Peter Leicht, Mark Greenfield, Yixiong Liu
  • Publication number: 20150064431
    Abstract: In one aspect, cutting tools are described having coatings adhered thereto which, in some embodiments, demonstrate desirable wear resistance and increased cutting lifetimes. A coated cutting tool described herein comprises a substrate and a coating adhered to the substrate, the coating including a refractory layer comprising plurality of sublayer groups, a sublayer group comprising an aluminum oxynitride (AlON) sublayer or a composite AlON sublayer and an alumina (Al2O3) sublayer or composite alumina sublayer.
    Type: Application
    Filed: August 30, 2013
    Publication date: March 5, 2015
    Applicant: Kennametal Inc.
    Inventors: Volkmar Sottke, Karl Heinz Wendt, Hartmut Westphal, Peter Leicht, Yixiong Liu
  • Publication number: 20150050490
    Abstract: In one aspect, coated cutting tools are described herein comprising a substrate and a coating comprising a refractory layer deposited by physical vapor deposition adhered to the substrate, the refractory layer comprising M1-xAlxN wherein x?0.68 and M is titanium, chromium or zirconium, the refractory layer including a cubic crystalline phase and having hardness of at least 25 GPa.
    Type: Application
    Filed: April 9, 2014
    Publication date: February 19, 2015
    Applicant: KENNAMETAL INC.
    Inventors: Vineet Kumar, Ronald Penich, Yixiong Liu
  • Publication number: 20150050489
    Abstract: In one aspect, coated cutting tools are described herein. In some embodiments, a coated cutting tool comprises a substrate and a refractory layer deposited by PVD adhered to the substrate, the refractory layer comprising M1-xAlxN wherein x?0.4 and M is titanium, chromium or zirconium, the refractory layer having a thickness greater than 5 ?m, hardness of at least 25 GPa and residual compressive stress less than 2.5 GPa.
    Type: Application
    Filed: August 16, 2013
    Publication date: February 19, 2015
    Applicant: Kennametal Inc.
    Inventors: Vineet Kumar, Ronald Penich, Peter Leicht, Yixiong Liu
  • Publication number: 20140342173
    Abstract: In one aspect, composite articles are described comprising multifunctional coatings. A composite article described herein, in some embodiments, comprises a substrate and a coating adhered to the substrate, the coating comprising an inner layer and an outer layer, the inner layer comprising a presintered metal or alloy and the outer layer comprising particles disposed in a metal or alloy matrix.
    Type: Application
    Filed: July 14, 2014
    Publication date: November 20, 2014
    Applicant: Kennametal Inc.
    Inventors: Qingjun ZHENG, Piyamanee Komolwit, Yixiong Liu, Jim Faust, Jonathan Bitler, Srinivasarao Boddapati
  • Patent number: 8865260
    Abstract: A coated ceramic cutting insert for removing material from a workpiece, as well as a method for making the same, that includes a ceramic substrate with a rake surface and at least one flank surface wherein a cutting edge is at the juncture therebetween. A wear-resistant coating scheme that includes an alumina-containing base coating layer region, which has at least one exposed alumina coating layer, deposited by chemical vapor deposition on the substantially all of the surfaces of the ceramic substrate that experience wear during removal of material from the workpiece. The exposed alumina coating layer exhibits a blasted stress condition ranging between about 50 MPa (tensile stress) and about ?2 GPa (compressive) as measured by XRD using the Psi tilt method and the (024) reflection of alumina. The exposed alumina coating layer is the result of wet blasting a titanium-containing outer coating layer region from the surface of the alumina-containing base coating layer region.
    Type: Grant
    Filed: June 3, 2013
    Date of Patent: October 21, 2014
    Assignee: Kennametal Inc.
    Inventors: Zhigang Ban, Alfred S. Gates, Jr., Yixiong Liu, Jie Wu
  • Publication number: 20140291036
    Abstract: In one aspect, cutting tools are described having coatings adhered thereto which, in some embodiments, can demonstrate desirable wear resistance and increased cutting lifetimes. A coated cutting tool described herein comprises a substrate and a coating adhered to the substrate, the coating having a multilayer structure including a plurality of structural units each comprising a bonding layer and an adjacent alumina layer, the alumina layer having a thickness of less than 0.5 ?m and the bonding layer having a thickness less than 1 ?m, the bonding layer comprising TiCN and TiAlOC.
    Type: Application
    Filed: March 27, 2014
    Publication date: October 2, 2014
    Applicant: Kennametal Inc.
    Inventors: Peter Rudolf Leicht, Zhenyu Liu, Mark S. Greenfield, Yixiong Liu
  • Publication number: 20140287229
    Abstract: In one aspect, cutting tools are described having coatings adhered thereto which, in some embodiments, can demonstrate desirable wear resistance and increased cutting lifetimes. A coated cutting tool, in some embodiments, comprises a substrate and a coating adhered to the substrate, the coating comprising at least one Zr doped layer deposited by chemical vapor deposition comprising ZrAl2O3.
    Type: Application
    Filed: March 20, 2014
    Publication date: September 25, 2014
    Applicant: Kennametal Inc.
    Inventors: Karl Heinz Wendt, Volkmar Sottke, Peter Rudolf Leicht, Yixiong Liu, Mark S. Greenfield, Hartmut Westphal
  • Publication number: 20140287228
    Abstract: A coated cutting insert and a method for making the same. The coated cutting insert has a substrate with a substrate surface. There is a backing coating scheme on the substrate surface, and a TiAl2O3 coating layer wherein the TiAl2O3 coating layer is deposited using chemical vapor deposition from a gaseous composition including AlCl3, H2, TiCl4, CO2 and HCl.
    Type: Application
    Filed: March 13, 2014
    Publication date: September 25, 2014
    Applicant: Kennametal Inc.
    Inventors: Zhenyu Liu, Rodrigo A. Cooper, Peter R. Leicht, Mark S. Greenfield, Yixiong Liu
  • Publication number: 20140287199
    Abstract: In one aspect, cutting tools are described having coatings adhered thereto which, in some embodiments, can demonstrate desirable wear resistance and increased cutting lifetimes. A coated cutting tool, in some embodiments, comprises a substrate and a coating adhered to the substrate, the coating comprising a polycrystalline layer of TiZrAl2O3.
    Type: Application
    Filed: March 20, 2014
    Publication date: September 25, 2014
    Applicant: Kennametal Inc.
    Inventors: Zhenyu Liu, Peter Rudolf Leicht, Rodrigo Alejandro Cooper, Mark S. Greenfield, Yixiong Liu
  • Publication number: 20140272446
    Abstract: In one aspect, articles are described herein comprising wear-resistant claddings. An article described herein, in some embodiments, comprises a metallic substrate and a cladding adhered to the substrate, the cladding including a metal matrix composite layer comprising at least one hard particle tile having a pore structure infiltrated with matrix metal or matrix alloy. Infiltration of the pore structure of the hard particle tile by the matrix metal or alloy can render the tile fully dense or substantially fully dense.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Applicant: Kannametal Inc.
    Inventors: Qingjun Zheng, Yixiong Liu, Robert J. Vasinko, Joel Thomas Dawson, 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
  • 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: 20140272391
    Abstract: Refractory coatings for cutting tool applications and methods of making the same are described herein which, in some embodiments, permit incorporation of increased levels of aluminum into nitride coatings while reducing or maintaining levels of hexagonal phase in such coatings. Coatings and methods described herein, for example, employ cubic phase forming compositions for limiting hexagonal phase in nitride coatings of high aluminum content.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Applicant: Kennametal Inc.
    Inventors: Vineet Kumar, Ronald Penich, Yixiong Liu