METHOD FOR PRODUCING SEAMLESS STEEL TUBE/PIPE
    32.
    发明申请
    METHOD FOR PRODUCING SEAMLESS STEEL TUBE/PIPE 审中-公开
    生产无缝钢管/管的方法

    公开(公告)号:US20130269407A1

    公开(公告)日:2013-10-17

    申请号:US13996128

    申请日:2011-12-20

    Abstract: When performing piercing-rolling by use of a plug with a protection film on its surface, applying a lubricant made of an aqueous solution containing a total of 5 to 30% mass % of one or more of boron oxide, boric acid, and amine borate to the protection film on the plug surface, and using this plug for piercing-rolling makes it possible to realize the increase of the life of plug for piecing-rolling without reducing the efficiency of piercing-rolling. The plug can be cooled after the piecing-rolling, the application of the above described lubricant is performed when the surface temperature of the front edge of plug decreases to 100° C. or less, and the plug is reused for the piercing-rolling. In this occasion, the protection film on the plug . surface can be formed by arc spraying iron wire material onto the surface of the base metal of plug, and comprises oxides and Fe.

    Abstract translation: 当在其表面上使用具有保护膜的塞子进行穿孔轧制时,涂布由含有总计5至30%质量%的硼氧化物,硼酸和胺硼酸盐中的一种或多种的水溶液制成的润滑剂 在插头表面上的保护膜上,并且使用该插头进行穿孔轧制,可以在不降低穿孔效率的情况下实现接头插头的寿命的增加。 塞子在接头轧制后可以冷却,当塞子前端的表面温度降低到100℃以下时,执行上述润滑剂的应用,并且将塞子重新用于穿孔轧制。 在这种情况下,保护膜上的插头。 表面可以通过电弧喷涂铁丝材料形成在塞子的母金属表面上,并且包括氧化物和Fe。

    Nanocomposite Coating for Hot MetalForming Tools
    34.
    发明申请
    Nanocomposite Coating for Hot MetalForming Tools 有权
    热金属成型工具的纳米复合涂层

    公开(公告)号:US20100307215A1

    公开(公告)日:2010-12-09

    申请号:US12477180

    申请日:2009-06-03

    Abstract: In one embodiment, a substrate, for example a tool used in hot metalforming operations, is coated with an enamel nanoparticulate graded coating. The nanoparticles in the coating may be boron-nitride nanoparticles. The coating may include a first portion adjacent a surface of the substrate, and a second portion adjacent the first portion. The first portion of the coating may have a lower volume fraction of nanoparticles than the second portion. The first portion has excellent adhesion to the surface of the substrate, and the second portion reduces friction and wear. The coated tool may be formed by applying at least one layer of a coating mixture to a surface of the tool and heating the coating mixture. A metal workpiece may be formed into an article by contacting the metal workpiece against the coated surface of the tool.

    Abstract translation: 在一个实施例中,衬底,例如用于热金属成形操作中的工具,涂覆有搪瓷纳米颗粒分级涂层。 涂层中的纳米颗粒可以是氮化硼纳米颗粒。 涂层可以包括邻近衬底的表面的第一部分和与第一部分相邻的第二部分。 涂层的第一部分可以具有比第二部分更低体积分数的纳米颗粒。 第一部分对基材的表面具有优异的粘附性,第二部分减少摩擦和磨损。 涂覆的工具可以通过将至少一层涂层混合物施加到工具的表面并加热涂层混合物而形成。 金属工件可以通过使金属工件与工具的涂覆表面接触而形成制品。

    Powdered lubricant composition for hot working and method for manufacturing seamless tubes
    39.
    发明申请
    Powdered lubricant composition for hot working and method for manufacturing seamless tubes 有权
    用于热加工的粉末润滑剂组合物和用于制造无缝管的方法

    公开(公告)号:US20070287642A1

    公开(公告)日:2007-12-13

    申请号:US11798950

    申请日:2007-05-18

    Abstract: With a powdered lubricant composition by the invention, in addition to the blending of one of anhydrous, pentahydrate or decahydrate salt in sodium borate and one of sodium or calcium salt of fat acid, mixing calcium or lithium carbonate as an auxiliary lubricant can prevent sodium borate (Na2B4O7), solidified as amorphous after a tube-making process, from moisture absorbance, drying and crystallization to thereby suppress the formation of Na2B4O7.5H2O on inside surfaces of finished-product tubes, thus enabling to circumvent occurrence of the white scales. Concurrently, they provide good diffusivity toward the working surface of workpiece, thus enabling to prolong a life of the mandrel bar and to widely be adopted as the most suitable powdered lubricant for manufacturing seamless tubes by Mandrel Mill rolling.

    Abstract translation: 通过本发明的粉末状润滑剂组合物,除了在硼酸钠和脂肪酸的钠盐或钙盐之一中的无水五水合物或十水合物盐之一的混合之外,混合碳酸钙或碳酸锂作为辅助润滑剂可以防止硼酸钠 (Na 2 B 4 S 7 O 7),在制管过程中固化为无定形,从吸水率,干燥和结晶到由此抑制 在最终产品管的内表面上形成Na 2 B 4 O 7 H 2 O 2 O 2, 从而能够规避白鳞的发生。 同时,它们对工件的工作表面提供良好的扩散性,从而能够延长芯棒的使用寿命,并被广泛地用作通过心轴轧机轧制制造无缝管的最合适的粉末润滑剂。

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