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    Hot rolled steel sheet and method for production thereof
    73.
    发明申请
    Hot rolled steel sheet and method for production thereof 有权
    热轧钢板及其制造方法

    公开(公告)号：US20060266445A1

    公开(公告)日：2006-11-30

    申请号：US10571023

    申请日：2004-09-02

    Applicant: Tatsuo Yokoi ,  Tetsuya Yamada ,  Osamu Kawano

    Inventor： Tatsuo Yokoi ,  Tetsuya Yamada ,  Osamu Kawano

    IPC: C22C38/00 ,  C21D8/00

    CPC classification number: C23C2/02 ,  C21D8/0226 ,  C21D2201/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C23C2/28 ,  Y10T428/12799

    Abstract: An exemplary hot rolled steel sheet can included, in terms of percent by mass, C of 0.01 to 0.2%; Si of 0.01 to 2%; Mn of 0.1 to 2%; P of ≦0.1%; S of ≦0.03%; Al of 0.001 to 0.1%; N of ≦0.01%; and as a remainder, Fe and unavoidable impurities. For example, a microstructure can be substantially a homogeneous continuous-cooled microstructure, and an average grain size of the microstructure may be more than 8 mm and 30 mm or less. An exemplary method for manufacturing a hot rolled steel sheet can include subjecting a slab having the above composition to a rough rolling so as to obtain a rough rolled bar, subjecting the rough rolled bar to a finish rolling so as to obtain a rolled steel under conditions in which a finishing temperature is (Ar3 transformation point +50° C.) or more; and starting cooling the rolled steel after 0.5 seconds or more pass from the end of the finish rolling at a temperature of the Ar3 transformation point or more. At least in the temperature range from the Ar3 transformation point can be cooled to 500° C. at a cooling rate of 80° C./sec or more, a further cooling can be effectuated until the temperature is 500° C. or less to obtain a hot rolled steel sheet and coiling the hot rolled steel sheet.

    Abstract translation: 作为热轧钢板，可以以质量％计含有0.01〜0.2％的C， Si为0.01〜2％ Mn为0.1〜2％ P <0.1％; S <0.03％; Al为0.001〜0.1％; N <0.01％; 作为余量，Fe和不可避免的杂质。 例如，微结构可以是基本上均匀的连续冷却微结构，并且微结构的平均晶粒尺寸可以大于8mm和30mm或更小。 用于制造热轧钢板的示例性方法可以包括对具有上述组成的板坯进行粗轧以获得粗轧条，对粗轧条进行精轧，以在条件下获得轧制钢 其中终轧温度为（Ar3相变点+ 50℃）以上; 在Ar3相变点以上的温度下，从精轧结束0.5秒钟以上开始冷却轧制钢。 至少在Ar 3相变点的温度范围内，可以以80℃/秒以上的冷却速度将其冷却至500℃，进一步冷却至500℃以下 得到热轧钢板并卷取热轧钢板。

    STEEL PIPE HAVING HIGH FORMABILITY AND METHOD FOR PRODUCING THE SAME
    75.
    发明申请
    STEEL PIPE HAVING HIGH FORMABILITY AND METHOD FOR PRODUCING THE SAME 失效
    具有高可塑性的钢管及其制造方法

    公开(公告)号：US20030131909A1

    公开(公告)日：2003-07-17

    申请号：US10049481

    申请日：2002-02-06

    Inventor： Naoki Yoshinaga ,  Nobuhiro Fujita ,  Manabu Takashi ,  Yasuhiro Shinohara ,  Tohru Yoshida ,  Natsuko Sugiura

    IPC: C22C038/00 ,  B21D026/02

    CPC classification number: C22C38/04 ,  C21D8/10 ,  C21D2201/00 ,  C21D2201/05 ,  C22C38/002 ,  C22C38/004 ,  C22C38/02 ,  C22C38/06 ,  Y10S148/909

    Abstract: The present invention provides a steel pipe excellent in formability during hydraulic forming and the like and a method to produce the same, and more specifically: a steel pipe excellent in formability having an r-value of 1.4 or larger in the axial direction of the steel pipe, and the property that the average of the ratios of the X-ray intensity in the orientation component group of null110null to null332null on the plane at the center of the steel pipe wall thickness to the random X-ray intensity is 3.5 or larger, and/or the ratio of the X-ray intensity in the orientation component of null110null on the plane at the center of the steel pipe wall thickness to the random X-ray intensity is 5.0 or larger; and a method to produce a steel pipe excellent in formability characterized by heating the steel pipe having the property that the ratio of the X-ray intensity in every one of the orientation components of null001null , null116null , null114null and null112null on the plane at the center of the mother pipe wall thickness to the random X-ray intensity is 3 or smaller to a temperature in the range from 650 to 1,200null C. and by applying working under a condition of a diameter reduction ratio of 30% or more and a wall thickness reduction ratio of 5 to 30%.

    Abstract translation: 本发明提供一种在液压成形等中成形性优异的钢管及其制造方法，更具体地说，在钢的轴向上具有r值为1.4以上的成形性优异的钢管 管子，以及在钢管壁厚度的中心的平面上{110} <110> <{115} <110>的取向成分组中的X射线强度的比率的平均值相对于 随机X射线强度为3.5以上，和/或在钢管壁厚中心的平面上{110} <110>的取向成分中的X射线强度与随机X射线 强度为5.0以上; 以及生产成型性优良的钢管的制造方法，其特征在于，加热具有{001} <110>，{116} <110>的各取向成分的X射线强度的比例的钢管， 在母管壁厚度中心的平面上的随机X射线强度的{114} <110>和{112} <110>为650以上1200℃以下的温度。 并且通过在直径减小率为30％以上，壁厚减少率为5〜30％的条件下进行加工。

    Ultrasonic machining and reconfiguration of braking surfaces
    76.
    发明授权
    Ultrasonic machining and reconfiguration of braking surfaces 失效
    制动表面的超声波加工和重新配置

    公开(公告)号：US06458225B1

    公开(公告)日：2002-10-01

    申请号：US09653987

    申请日：2000-09-01

    Applicant: Efim S. Statnikov

    Inventor： Efim S. Statnikov

    IPC: C21D1000

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

    Abstract: The novel methods, apparatus and reworked rotary braking surface product, for example those exhibited on interior cylindrical braking surfaces of a cast iron brake drum, serve to replace manufacturing defects exhibiting residual tensile stresses and outwardly directed tool marks with smooth compressed braking surfaces in a final manufacturing stage. The plastically deformed surface shape with reduced roughness and surface irregularities furthermore presents improved braking strength above the yield point and approaching the ultimate material strength of the base drum material. An ultrasonic transducer drives individual freely moving impact elements of a set at frequencies up to 55 kHz into the braking surface to effect plastic deformation at surface and sub-surface layers. Physically, the small sized ultrasonic transducer is inserted into a drum cylinder and driven by a lathe producing relative motion between the braking surface and the ultrasonically vibrating impact elements scanning only the braking surface in a readily controlled ultrasonic impact machining cycle for attaining specified braking surface performance.

    Abstract translation: 新型的方法，设备和返工的旋转制动表面产品，例如在铸铁制动鼓的内部圆柱形制动表面上展示的那些，用于在最终的平滑压缩制动表面中替换具有残余拉伸应力的制造缺陷和向外指向的工具标记 制造阶段。 具有减小的粗糙度和表面不规则性的塑性变形的表面形状进一步提高了高于屈服点并接近基底鼓材料的最终材料强度的制动强度。 超声波换能器将各种自由移动的冲击元件以高达55kHz的频率驱动到制动表面，以在表面和表面下层发生塑性变形。 在物理上，小型超声波换能器被插入到鼓缸中并由车床驱动，在制动表面和超声波振动的冲击元件之间产生相对运动，其仅在容易控制的超声波冲击加工循环中仅扫描制动表面，以获得规定的制动表面性能 。

    Maraging steel and process for manufacturing a strip or a part cut out of a strip of cold-rolled maraging steel
    77.
    发明申请
    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：US20020059967A1

    公开(公告)日：2002-05-23

    申请号：US09988134

    申请日：2001-11-19

    Applicant: IMPHY UGINE PRECISION

    Inventor： Lucien Coutu

    IPC: C22C038/08 ,  C23C008/26

    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%nullNinull24.5%; 2.5%nullMonull12%; 4.17%nullConull20%, Al%null0.15%; Tinull0.1%; Nnull0.003%; Sinull0.1%; Mnnull0.1%; Cnull0.005%; Snull0.001%; Pnull0.005%; Hnull0.0003%; Onull0.001%; iron and impurities resulting from smelting, the chemical composition also satisfying the relationships: 20%nullNinullMonull27%; 50nullConullMonull200; TinullNnull2null10null4.

    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 <= 2×10-4。

    Ultrasonic impact methods for treatment of welded structures
    78.
    发明授权
    Ultrasonic impact methods for treatment of welded structures 有权
    用于焊接结构处理的超声波冲击方法

    公开(公告)号：US06338765B1

    公开(公告)日：2002-01-15

    申请号：US09288020

    申请日：1999-04-08

    Applicant: Efim S. Statnikov

    Inventor： Efim S. Statnikov

    IPC: B23Q1700

    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.

    Abstract translation: 本发明提供了通过脉冲冲击能量，优选超声波处理诸如钢，青铜，塑料等材料的工件的特别是焊接钢体的方法，以放松疲劳和老化并延长使用寿命。 治疗可能发生（a）在原始生产时，（b）在维持生命期间或（c）修复阶段失败后。 超声处理提高了工件产品的强度。 在焊接产品中，焊接部位附近的残余应力模式松弛，微应力缺陷如空隙和异常晶界减小。 基本的方法步骤本质上是非破坏性的，通过超声换能器和辅助工具引起内部脉冲压缩波，利用足够的冲击能量冲击外部产品表面，以加热和暂时塑化金属内部并松弛应力。 被处理的工作产品内部结构的性质通过感测工作体的冲击表面处的机械运动来确定，以产生响应于输入冲击信号的反馈频率和相位信号。 这些信号自动将驱动脉冲能量频率和相位与输入传感器相符合，以匹配工作换能器的机械共振频率，并提高能量传递的效率。 这样的反馈信号也可用于可以提高产品质量和一致性的自动化程序。

    Densification via thermal treatment
    79.
    发明授权
    Densification via thermal treatment 失效
    通过热处理致密化

    公开(公告)号：US06315838B1

    公开(公告)日：2001-11-13

    申请号：US09525614

    申请日：2000-03-14

    Applicant: David C. Dunand ,  Christopher Schuh

    Inventor： David C. Dunand ,  Christopher Schuh

    IPC: C21D100

    CPC classification number: C22C1/1094 ,  C21D1/00 ,  C21D1/785 ,  C21D2201/00 ,  C22F1/00 ,  C22F1/04

    Abstract: A method for creep cavity shrinkage and/or porosity reduction without applied stress. The thermal treatment is found to increase the rate of densification relative to isothermal annealing, allowing for more rapid recovery of desired theoretical density in a shorter time.

    Abstract translation: 一种不施加应力的蠕变腔收缩和/或孔隙率降低的方法。 发现热处理增加了相对于等温退火的致密化速率，允许在更短的时间内更快速地恢复理想的理论密度。

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