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    Large-size diesel exhaust valve and manufacturing method thereof
    2.
    发明授权
    Large-size diesel exhaust valve and manufacturing method thereof 有权

    公开(公告)号：US12104508B1

    公开(公告)日：2024-10-01

    申请号：US18710730

    申请日：2022-11-15

    申请人： COSCO SHIPPING MARINE EQUIPT & SPARES (NJ) CO., LTD

    发明人： Hong Lu ,  Weiwei Dai ,  Lihe Jiang ,  Guozheng Quan ,  Xiaolin Zhang

    IPC分类号： C22C19/05 ,  B21J5/02 ,  C22F1/10 ,  F01L3/02

    CPC分类号： F01L3/02 ,  B21J5/02 ,  C22C19/058 ,  C22F1/10

    摘要： Provided are a large-size diesel exhaust valve and a manufacturing method thereof, which relate to the technical field of manufacturing of large-size diesel exhaust valves for ships. The large-size diesel exhaust valve includes an exhaust valve disc portion made of a 3J40 alloy, and the large-size diesel exhaust valve has the following microstructure: there are ultra-fine grains with a grain size of 10 grade or more, α-Cr lamellar phases are evenly distributed at grain boundaries of the ultra-fine grains, nickel-lean Cr—Al—Ce particle phases are evenly distributed in a matrix, a single lamella of the α-Cr lamellar phases has a thickness of less than 140 nm, and the nickel-lean Cr—Al—Ce particle phases have a diameter of less than 10 μm. The present application solves the technical problem of how to improve the comprehensive mechanical properties and the vibration-damping performance of a large-size diesel exhaust valve simultaneously.

    SINGLE-STEP PROCESS FOR SELECTIVE HEAT TREATMENT OF METALS USING MULTIPLE HEATING SOURCES
    4.
    发明公开
    SINGLE-STEP PROCESS FOR SELECTIVE HEAT TREATMENT OF METALS USING MULTIPLE HEATING SOURCES 审中-公开

    公开(公告)号：US20240254611A1

    公开(公告)日：2024-08-01

    申请号：US18162851

    申请日：2023-02-01

    申请人： Raytheon Technologies Corporation

    发明人： Masoud Anahid ,  David U. Furrer ,  Matthew D. Mordasky ,  Anthony Patrick Ventura

    IPC分类号： C22F1/10 ,  C22F1/11

    CPC分类号： C22F1/10 ,  C22F1/11

    摘要： The present disclosure provides assemblies, systems and methods for a single-step process for selective heat treatment of metals. More particularly, the present disclosure provides assemblies, systems and methods for a single-step process for selective heat treatment of metals using multiple heating sources. A hybrid modeling-test approach can be used in the design process to improve or optimize the process parameters to achieve location specific and improved/optimal microstructure and residual stress to enhance the part performance. It is also noted that performing the selective heat treatment in a single step can reduce the cycle time significantly. Moreover, large thermal gradients can be avoided in the part as different volumes of the part are heated to their desired temperature simultaneously.

    THERMAL SHOCK SYNTHESIS OF MULTIELEMENT NANOPARTICLES
    6.
    发明公开
    THERMAL SHOCK SYNTHESIS OF MULTIELEMENT NANOPARTICLES 审中-公开

    公开(公告)号：US20240218493A1

    公开(公告)日：2024-07-04

    申请号：US18405784

    申请日：2024-01-05

    申请人： UNIVERSITY OF MARYLAND, COLLEGE PARK

    发明人： Yonggang YAO ,  Liangbing HU

    IPC分类号： C22F1/00 ,  B22F9/24 ,  B82Y30/00 ,  B82Y40/00 ,  C22F1/10 ,  C22F1/14

    CPC分类号： C22F1/002 ,  B22F9/24 ,  C22F1/10 ,  C22F1/14 ,  B82Y30/00 ,  B82Y40/00

    摘要： A formation of multielement nanoparticles is disclosed that includes at least three elements. Each of the at least three elements is uniformly distributed within the multielement nanoparticles forming nanoparticles having a homogeneous mixing structure. At least five elements may form a high-entropy nanoparticle structure. A method for manufacturing a formation of multielement nanoparticles includes providing a precursor material composed of the at least three component elements in multielement nanoparticles; heating the precursor material to a temperature and a time; and quenching the precursor to a temperature at a cooling rate to result in a formation of multielement nanoparticles containing at least three elements and the heating and the quenching representing a multielement nanoparticle thermal shock formation process. A corresponding system for manufacturing the formation of multielement nanoparticles and a method of using the multielement nanoparticles are also disclosed.