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    Ultrasonic impact machining of body surfaces to correct defects and strengthen work surfaces
    21.
    发明授权
    Ultrasonic impact machining of body surfaces to correct defects and strengthen work surfaces 有权
    超声波冲击加工机身表面以纠正缺陷并加强工作表面

    公开(公告)号：US06932876B1

    公开(公告)日：2005-08-23

    申请号：US10207859

    申请日：2002-07-31

    Applicant: Efim S. Statnikov

    Inventor： Efim S. Statnikov

    IPC: B06B1/02 ,  B23K9/32 ,  B23K13/00 ,  B23K20/10 ,  C21D7/04 ,  C21D9/50 ,  C21D10/00 ,  C22F3/00

    CPC classification number: B23P6/00 ,  B06B1/0253 ,  B23K9/32 ,  B23K13/00 ,  B23K20/10 ,  B23K20/106 ,  B23P9/04 ,  C21D1/09 ,  C21D7/04 ,  C21D9/0068 ,  C21D9/32 ,  C21D9/38 ,  C21D9/40 ,  C21D9/50 ,  C21D10/00 ,  C21D2201/00 ,  Y10S29/046 ,  Y10S72/71 ,  Y10S148/902 ,  Y10T428/12472 ,  Y10T428/12993

    Abstract: Metallic workpieces of diverse shapes having work surfaces which are deformed at the surface and adjacent sub-surface layers by surface impact from ultrasonic transducers employing freely axially moving impacting elements propelled and energized by a transducer oscillating surface vibrating periodically at an ultrasonic frequency. The impacting elements are propelled in a random aperiodic and controlled impact mode at different phases of the periodic oscillation cycles. The transducer may be portable and provides a series of mechanically interconnected stages having mechanical resonances harmonically related as a multiple of the primary ultrasonic frequency and have matched stage resistances under instantaneous loading when the impact elements are driven by the transducer oscillating surface into the surface of the workpiece. This mode of operation produces Q-factor amplification of the input ultrasonic power oscillator energy at the impact needles and high propulsion velocities making it possible to machine metallic workpiece bodies to greater depths for compressing the metal to increase compressive strength of the workpiece work surfaces to substantially the ultimate material strength. The impact machining is done at ambient temperatures.

    Abstract translation: 各种形状的金属工件具有工作表面，其工作表面在表面和相邻的子表面层上通过来自超声波换能器的表面冲击而产生变形，所述超声波换能器采用由以超声波频率周期性振荡的振荡器振荡表面推动和激励的自由轴向运动的冲击元件。 冲击元件在周期性振荡周期的不同阶段以随机的非周期和受控冲击模式推进。 传感器可以是便携式的，并且提供一系列机械互连的级，其具有与初级超声波频率的倍数谐波相关的机械共振，并且当冲击元件被换能器振荡表面驱动到 工件。 这种操作模式在冲击针上产生输入的超声功率振荡器能量的Q因子放大和高推进速度，使得可以将金属工件体加工到更大的深度以压缩金属，从而将工件工作表面的抗压强度基本上 最终材料力量。 冲击加工在环境温度下进行。

    High strength and high ductility steel sheet plate having hyperfine crystal grain structure produced by ordinary low carbon steel to low strain working and annealing, and method for production thereof
    22.
    发明申请
    High strength and high ductility steel sheet plate having hyperfine crystal grain structure produced by ordinary low carbon steel to low strain working and annealing, and method for production thereof 审中-公开
    通过普通低碳钢制造的超细晶粒结构，低应变加工退火的高强度，高延展性的钢板，及其制造方法

    公开(公告)号：US20040112484A1

    公开(公告)日：2004-06-17

    申请号：US10471545

    申请日：2003-09-11

    Inventor： Yoshihiro Saito ,  Tsuji Nobuhiro ,  Rintaro Ueji

    IPC: C21D001/60

    CPC classification number: C22C38/02 ,  C21D1/25 ,  C21D8/02 ,  C21D8/0236 ,  C21D8/0273 ,  C21D2201/00 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/04

    Abstract: A high strength and high ductility low carbon steel having a tensile strength of 800 MPa or more, an uniform elongation of 5% or more, and an elongation to failure of 20% or more which is produced by a method comprising subjecting an ordinary low carbon steel or an ordinary low carbon steel added with boron in an amount being 0.01% or less and effective for accelerating martensitic transformation to processing and heat treatment to prepare a product having coarser size of austenite crystal grains and then to water-quenching, to provide a steel product having a martensite phase in an amount of 90% or more, and subjecting the steel product to a low strain processing, specifically a cold rolling at a total rolling reduction in thickness of 20% or more and less than 80%, and to a low temperature annealing at 500null C. to 600null C., and a method for producing said high strength and high ductility low carbon steel.

    Abstract translation: 通过以下方法制造的拉伸强度为800MPa以上，均匀伸长率为5％以上，断裂伸长率为20％以上的高强度，高延展性的低碳钢，该方法包括使普通低碳 钢或普通低碳钢，其添加量为0.01％以下，并且有效加速马氏体转变成加工和热处理，以制备具有较大尺寸的奥氏体晶粒的产品，然后进行水淬，从而提供 具有90％以上的马氏体相的钢产品，并且对钢制品进行低应变加工，特别是在总轧制压下量为20％以上且小于80％的情况下的冷轧，以及 在500℃至600℃的低温退火，以及用于生产所述高强度和高延展性低碳钢的方法。

    Maraging steel and process for manufacturing a strip or a part cut out of a strip of cold-rolled maraging steel
    23.
    发明授权
    Maraging steel and process for manufacturing a strip or a part cut out of a strip of cold-rolled maraging steel 有权
    马氏体时效钢和制造一条钢带或由一条冷轧马氏体时效钢切割的部件的工艺

    公开(公告)号：US06663730B2

    公开(公告)日：2003-12-16

    申请号：US09988134

    申请日：2001-11-19

    Applicant: Lucien Coutu

    Inventor： Lucien Coutu

    IPC: C22C3812

    CPC classification number: C21D8/0205 ,  C21D6/02 ,  C21D8/0236 ,  C21D8/0273 ,  C21D2201/00 ,  C22C38/004 ,  C22C38/105 ,  C22C38/12

    Abstract: A maraging steel strip or part and process for manufacture of a strip or of a part cut out of a strip of cold-rolled maraging steel and hardened by a hardening heat treatment. In the process, before the hardening heat treatment is performed, the strip or the part is subjected to cold plastic deformation with a degree of working greater than 30% and the strip or the part is subjected to recrystallization annealing in order to obtain a fine-grained structure with ASTM index higher than 8. The composition by weight of the maraging steel is: 12%≦Ni≦24.5%; 2.5%≦Mo≦12%; 4.17%≦Co≦20%, Al %≦0.15%; Ti≦0.1%; N≦0.003%; Si≦0.1%; Mn≦0.1%; C≦0.005%; S≦0.001%; P≦0.005%; H≦0.0003%; O≦0.001%; iron and impurities resulting from smelting, the chemical composition also satisfying the relationships: 20%≦Ni+Mo≦27%; 50≦Co×Mo≦200; Ti×N≦2×10−4.

    Abstract translation: 一种马氏体时效钢带或其制造方法，用于制造由冷轧马氏体时效钢带切割出的钢带或部分切割并通过硬化热处理硬化的部件。 在该过程中，在进行硬化热处理之前，将带材或部件进行冷塑性变形，其加工程度大于30％，并对带材或部件进行再结晶退火， ASTM指数高于8的颗粒结构。马氏体时效钢的重量组成为：12％<= Ni <= 24.5％; 2.5％<= Mo <= 12％; 4.17％<= Co <= 20％，Al％<= 0.15％; Ti <= 0.1％; N <= 0.003％; Si <= 0.1％; Mn <= 0.1％; C <= 0.005％; S <= 0.001％; P <= 0.005％; H <= 0.0003％; O <= 0.001％; 铁和冶炼产生的杂质，化学成分也满足关系：20％<= Ni + Mo <= 27％; 50 <= CoxMo <= 200; TixN <= 2X10 <-4>。

    Ultrasonic impact methods for treatment of welded structures
    24.
    发明申请
    Ultrasonic impact methods for treatment of welded structures 有权

    公开(公告)号：US20020043313A1

    公开(公告)日：2002-04-18

    申请号：US10015670

    申请日：2001-12-17

    Applicant: UIT, L.L.C. Company

    Inventor： Efim S. Statnikov

    IPC: C21D010/00

    CPC classification number: B23P9/04 ,  B23K9/32 ,  B23K13/00 ,  C21D7/04 ,  C21D9/50 ,  C21D10/00 ,  C21D2201/00 ,  Y10T29/49774 ,  Y10T29/53535

    Abstract: This invention provides methods of treatment for work products of materials such as steel, bronze, plastic, etc. and particularly welded steel bodies by pulse impact energy, preferably ultrasonic, to relax fatigue and aging and extend expectant life. The treatment may occur (a) at original production, (b) during the active life period for maintenance or (c) after failure in a repair stage. The ultrasonic treatment improves the work product strength. In welded products residual stress patterns near the weld sites are relaxed and micro-stress defects such as voids and unusual grain boundaries are reduced. The basic method steps are non-destructive in nature, inducing interior pulse compression waves with ultrasonic transducers and accessory tools impacting an external product surface with enough impulse energy to heat and temporarily plasticize the metal interior and relax stresses. The nature of the work product interior structure being treated is determined by sensing the mechanical movement at the impact surface of the work body to produce feedback frequency and phase signals responsive to input impact signals. These signals automatically conform driving pulse energy frequency and phase to the input transducers to match the mechanical resonance frequency of the working transducers and increase efficiency of energy transfer. Such feedback signals also are available for automated procedures which can improve product quality and consistency.

    High toughness steel and a method for manufacturing the same
    25.
    发明授权
    High toughness steel and a method for manufacturing the same 失效
    高韧性钢及其制造方法

    公开(公告)号：US06348108B1

    公开(公告)日：2002-02-19

    申请号：US09260056

    申请日：1999-03-02

    Applicant: Satoru Yusa ,  Kaneaki Tsuzaki ,  Toshihiko Takahashi

    Inventor： Satoru Yusa ,  Kaneaki Tsuzaki ,  Toshihiko Takahashi

    IPC: C22C3804

    CPC classification number: C21D8/00 ,  C21D7/13 ,  C21D2201/00 ,  C22C38/04

    Abstract: Ups and downs having a cycle of not more than 5 &mgr;m and an amplitude of not less than 200 nm are formed in a part of not less than 70% per unit length of a prior-austenite grain boundary which is observed in a linear form when seen from a vertical plane by a series of steps of subjecting a steel in a state of austenite to a deformation in not less than 30% of a total area reduction rate at a temperature region which is lower than recrystallization temperature of austenite, and subsequently cooling a deformed steel without causing neither recrystallization nor phase transformation of a diffusion type.

    Abstract translation: 具有不大于5um的周期和不小于200nm的振幅的上升和下降部分以不小于70％的单位长度的先前奥氏体晶界形成，其以线性形式观察到， 从垂直平面观察，通过一系列步骤，使奥氏体状态的钢在奥氏体的再结晶温度以下的温度区域以不低于总面积减少率的30％的变形量进行变形，随后冷却 变形钢不会引起再结晶也不引起扩散型的相变。

    Metallic article resistant to buckling
    26.
    发明授权
    Metallic article resistant to buckling 失效
    金属制品耐屈曲

    公开(公告)号：US06287399B1

    公开(公告)日：2001-09-11

    申请号：US09181214

    申请日：1998-10-27

    Applicant: Yuta Urushiyama

    Inventor： Yuta Urushiyama

    IPC: C21D100

    CPC classification number: C22F1/006 ,  C21D7/02 ,  C21D2201/00 ,  C21D2201/01 ,  C21D2221/00 ,  C21D2281/00 ,  Y10S148/902

    Abstract: Disclosed is an elongated metallic article having a curved section therein which has a first part formed on an outside part of the curved section, and a second part formed on an inside part of the curved section. The first part was initially deformed beyond a region of twin boundary deformation, but was thereafter returned to the region of twin boundary deformation. The second part was left deformed beyond the region of twin boundary deformation. When a compressive load is applied to the thus prepared article, and the first part and the second part are both compressed, the first part can deform more readily than the second part so that the article deforms into a more straight shape as its deformation progresses. Thus, the article may be made resistant to buckling in spite of the presence of the curved section.

    Abstract translation: 公开了一种细长金属制品，其具有弯曲部分，其中具有形成在弯曲部分的外侧部分上的第一部分，以及形成在弯曲部分的内侧部分上的第二部分。 第一部分最初变形超过双边界变形区域，然后返回到双边界变形区域。 第二部分变形超出双边界变形区域。 当对这样制备的制品施加压缩载荷，并且第一部分和第二部分都被压缩时，第一部分可以比第二部分更容易变形，使得制品在其变形进行时变形为更直的形状。 因此，即使存在弯曲部分，制品也可以抗屈曲。

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