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).

  • WEAR-RESISTANT CLADDINGS
    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
  • Carbide pellets for wear resistant applications
    Patent number: 8834786
    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: June 30, 2010
    Date of Patent: September 16, 2014
    Assignee: Kennametal Inc.
    Inventors: Terry Wayne Kirk, Hongbo Tian, Xin Deng, Debangshu Banerjee, Qingjun Zheng
  • Functionally graded coating
    Patent number: 8808870
    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: Grant
    Filed: November 28, 2011
    Date of Patent: August 19, 2014
    Assignee: Kennametal Inc.
    Inventors: Qingjun Zheng, Piyamanee Komolwit, Yixiong Liu, Jim Faust, Jonathan Bitler, Srinivasarao Boddapati
  • Corrosion And Wear-Resistant Claddings
    Publication number: 20140057124
    Abstract: In one aspect, composite articles are described herein comprising wear-resistant claddings demonstrating improved corrosion resistance. A composite article described herein, in some embodiments, comprises a metal or alloy substrate and a cladding adhered to the substrate, the cladding comprising cemented carbide particles and an alloying additive dispersed in a nickel-based alloy matrix, wherein the alloying additive comprises at least one of copper and molybdenum.
    Type: Application
    Filed: August 24, 2012
    Publication date: February 27, 2014
    Applicant: Kennametal Inc.
    Inventors: Piyamanee Komolwit, Qingjun Zheng, Jim Faust
  • FUNCTIONALLY GRADED COATING
    Publication number: 20130136941
    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: November 28, 2011
    Publication date: May 30, 2013
    Applicant: Kennametal Inc.
    Inventors: Qingjun Zheng, Piyamanee Komolwit, Yixiong Liu, Jim Faust, Jonathan Bitler, Srinivasarao Boddapati
  • Carbide Pellets for Wear Resistant Applications
    Publication number: 20120003488
    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: Application
    Filed: June 30, 2010
    Publication date: January 5, 2012
    Applicant: Kennametal Inc.
    Inventors: Terry Wayne Kirk, Hongbo Tian, Xin Deng, Debangshu Banerjee, Qingjun Zheng