Post weld heat treatment for chemically stabilized austenitic stainless steel
    2.
    发明申请
    Post weld heat treatment for chemically stabilized austenitic stainless steel 有权
    用于化学稳定的奥氏体不锈钢的焊后热处理

    公开(公告)号:US20090020191A1

    公开(公告)日:2009-01-22

    申请号:US10570780

    申请日:2004-06-16

    CPC classification number: C21D6/004 C21D1/30 C21D1/78 C21D9/50

    Abstract: Thermo-mechanical properties of welds in stainless steel is substantially improved by the implementation of a post weld heat treatment that iliminates sigma phase in the heat treated zone and favors niobium carbonitride precipitate formation in a desirable size range. In most cases, post weld heat treated material can be employed in pressurized devices at temperatures exceeding 550° C., which is currently regarded the upper safe temperature limit, and material according to the inventive subject matter was tested at temperature of up to 850° C. without reheat cracking.

    Abstract translation: 不锈钢焊缝的热机械性能通过实施在热处理区域中描绘σ相的焊后热处理而显着提高,并且有利于在期望的尺寸范围内的碳氮化铌沉淀物形成。 在大多数情况下,焊后热处理材料可以在超过550℃的加压装置中使用,其目前被认为是较高的安全温度极限,并且根据本发明主题的材料在高达850°C的温度下被测试 C.没有再加热开裂。

    Configurations and methods for ultrasound time of flight diffraction analysis
    3.
    发明申请
    Configurations and methods for ultrasound time of flight diffraction analysis 有权
    超声飞行时间衍射分析的配置和方法

    公开(公告)号:US20060130586A1

    公开(公告)日:2006-06-22

    申请号:US10541974

    申请日:2003-07-24

    Abstract: An ultrasound test apparatus for polymeric materials (e.g., plastic pipes) includes a low-absorption housing that at least partially encloses an ultrasound transducer, wherein the transducer emits a low frequency wide angle ultrasound beam with a narrow bandwidth. In especially preferred configurations and methods, the apparatus will detect flaws in polymeric pipes, and especially in welds or stressed zones of such pipes, wherein defects of less than 4% of the wall thickness (up to 4 inches) are detected. Further disclosed are configurations and methods for nondestructive detection of lack-of-fusion defects in polymeric pipes.

    Abstract translation: 用于聚合材料(例如,塑料管)的超声波测试装置包括至少部分地包围超声换能器的低吸收壳体,其中换能器发射具有窄带宽的低频广角超声波束。 在特别优选的配置和方法中,该装置将检测聚合物管道中的缺陷,特别是在这种管道的焊缝或应力区域中,其中检测到壁厚小于4%(高达4英寸)的缺陷。 进一步公开的是用于非破坏性检测聚合物管中缺陷的缺陷的构造和方法。

    High-Speed Friction Stir Welding
    4.
    发明申请
    High-Speed Friction Stir Welding 有权
    高速摩擦搅拌焊接

    公开(公告)号:US20110174866A1

    公开(公告)日:2011-07-21

    申请号:US13000469

    申请日:2009-07-09

    Abstract: Contemplated systems and methods significantly improve friction stir welding of hard metals and particularly steel and stainless steel. Among other factors, the inventors found that high transverse velocity of the tool is critical to obtain predictable and desirable weld quality, which is preferably achieved in such materials by minimizing spindle run out. Moreover, the transverse and angular velocities are preferably selected such as to achieve a temperature in the weld that is below the phase change temperature and/or the solid state transformation point of the materials.

    Abstract translation: 考虑的系统和方法显着改善了硬金属,特别是钢和不锈钢的摩擦搅拌焊接。 除了其他因素之外,本发明人发现,该工具的高横向速度对于获得可预测的和期望的焊接质量是至关重要的,其优选地通过使主轴耗尽最小化而在这种材料中实现。 此外,横向和角速度优选地被选择为使得焊接中的温度低于材料的相变温度和/或固态转变点。

    Configurations and methods for ultrasound time of flight diffraction analysis
    7.
    发明授权
    Configurations and methods for ultrasound time of flight diffraction analysis 有权
    超声飞行时间衍射分析的配置和方法

    公开(公告)号:US07255007B2

    公开(公告)日:2007-08-14

    申请号:US10541974

    申请日:2003-07-24

    Abstract: An ultrasound test apparatus for polymeric materials (e.g., plastic pipes) includes a low-absorption housing that at least partially encloses an ultrasound transducer, wherein the transducer emits a low frequency wide angle ultrasound beam with a narrow bandwidth. In especially preferred configurations and methods, the apparatus will detect flaws in polymeric pipes, and especially in welds or stressed zones of such pipes, wherein defects of less than 4% of the wall thickness (up to 4 inches) are detected. Further disclosed are configurations and methods for nondestructive detection of lack-of-fusion defects in polymeric pipes.

    Abstract translation: 用于聚合材料(例如,塑料管)的超声波测试装置包括至少部分地包围超声换能器的低吸收壳体,其中换能器发射具有窄带宽的低频广角超声波束。 在特别优选的配置和方法中,该装置将检测聚合物管道中的缺陷,特别是在这种管道的焊缝或应力区域中,其中检测到壁厚小于4%(高达4英寸)的缺陷。 进一步公开的是用于非破坏性检测聚合物管中缺陷的缺陷的构造和方法。

    High-speed friction stir welding
    8.
    发明授权
    High-speed friction stir welding 有权
    高速摩擦搅拌焊接

    公开(公告)号:US08967451B2

    公开(公告)日:2015-03-03

    申请号:US13000469

    申请日:2009-07-09

    Abstract: Contemplated systems and methods significantly improve friction stir welding of hard metals and particularly steel and stainless steel. Among other factors, the inventors found that high transverse velocity of the tool is critical to obtain predictable and desirable weld quality, which is preferably achieved in such materials by minimizing spindle run out. Moreover, the transverse and angular velocities are preferably selected such as to achieve a temperature in the weld that is below the phase change temperature and/or the solid state transformation point of the materials.

    Abstract translation: 考虑的系统和方法显着改善了硬金属,特别是钢和不锈钢的摩擦搅拌焊接。 除了其他因素之外,本发明人发现,该工具的高横向速度对于获得可预测的和期望的焊接质量是至关重要的,其优选地通过使主轴耗尽最小化而在这种材料中实现。 此外,横向和角速度优选地被选择为使得焊接中的温度低于材料的相变温度和/或固态转变点。

    Post weld heat treatment for chemically stabilized austenitic stainless steel
    9.
    发明授权
    Post weld heat treatment for chemically stabilized austenitic stainless steel 有权
    用于化学稳定的奥氏体不锈钢的焊后热处理

    公开(公告)号:US07837810B2

    公开(公告)日:2010-11-23

    申请号:US10570780

    申请日:2004-06-16

    CPC classification number: C21D6/004 C21D1/30 C21D1/78 C21D9/50

    Abstract: Thermo-mechanical properties of welds in stainless steel is substantially improved by the implementation of a post weld heat treatment that illiminates sigma phase in the heat treated zone and favors niobium carbonitride precipitate formation in a desirable size range. In most cases, post weld heat treated material can be employed in pressurized devices at temperatures exceeding 550° C., which is currently regarded the upper safe temperature limit, and material according to the inventive subject matter was tested at temperature of up to 850° C. without reheat cracking.

    Abstract translation: 通过实施在热处理区域中消除σ相的焊后热处理,并且有利于在合适的尺寸范围内的碳氮化铌沉淀物形成,可以显着改善不锈钢焊缝的热机械性能。 在大多数情况下,焊后热处理材料可以在超过550℃的加压装置中使用,其目前被认为是较高的安全温度极限,并且根据本发明主题的材料在高达850°C的温度下被测试 C.没有再加热开裂。

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