Plug, piercing-rolling mill, and method of producing seamless tube by using the same
    3.
    发明授权
    Plug, piercing-rolling mill, and method of producing seamless tube by using the same 有权
    插头,穿孔轧机,以及使用其制造无缝管的方法

    公开(公告)号:US08544306B2

    公开(公告)日:2013-10-01

    申请号:US13212929

    申请日:2011-08-18

    IPC分类号: B21B19/04

    CPC分类号: B21B25/00 B21B19/04 B21B25/04

    摘要: A plug includes a front edge portion having a convex curvature; a cylindrical portion having a truly or nearly cylindrical shape; a trunk portion having an outer diameter gradually increasing toward a rear edge thereof; a mandrel joint provided in a rear edge portion of the plug; a lubricant ejection hole running through the trunk portion from the mandrel joint that opens on the surface of the cylindrical portion; and a coating comprising oxides and Fe that is formed on the base metal surface of each of the front edge portion as well as the trunk portion by arc spraying using an iron wire. In this way, the plug can prevent inner surface flaws from occurring in a hollow blank that is deformed by piercing-rolling, and can extend its life without requiring a long time for making it.

    摘要翻译: 塞子包括具有凸曲率的前边缘部分; 具有真正或近似圆柱形形状的圆柱形部分; 躯干部分的外径朝向其后缘逐渐增加; 设置在所述插头的后端部的心轴接头; 润滑剂喷射孔,其从所述心轴接头穿过所述躯干部分,所述心轴接头在所述圆筒部分的表面上开口; 以及通过使用铁丝的电弧喷涂而形成在前边缘部分和后端部的基底金属表面上的氧化物和Fe的涂层。 以这种方式,塞子可以防止在通过穿孔轧制变形的中空坯件中发生内表面缺陷,并且可以延长其使用寿命而不需要很长时间来制造它。

    METHOD FOR PRODUCING SEAMLESS STEEL TUBE/PIPE
    5.
    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

    IPC分类号: B21B25/04 B21B19/04

    摘要: 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.

    摘要翻译: 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。

    Plug, Piercing-Rolling Mill, and Method of Producing Seamless Tube by Using the Same
    6.
    发明申请
    Plug, Piercing-Rolling Mill, and Method of Producing Seamless Tube by Using the Same 有权
    插头,穿孔机,以及使用其生产无缝管的方法

    公开(公告)号:US20120210761A1

    公开(公告)日:2012-08-23

    申请号:US13212929

    申请日:2011-08-18

    IPC分类号: B21B45/02 B21B19/04

    CPC分类号: B21B25/00 B21B19/04 B21B25/04

    摘要: A plug includes a front edge portion having a convex curvature; a cylindrical portion having a truly or nearly cylindrical shape; a trunk portion having an outer diameter gradually increasing toward a rear edge thereof; a mandrel joint provided in a rear edge portion of the plug; a lubricant ejection hole running through the trunk portion from the mandrel joint that opens on the surface of the cylindrical portion; and a coating comprising oxides and Fe that is formed on the base metal surface of each of the front edge portion as well as the trunk portion by arc spraying using an iron wire. In this way, the plug can prevent inner surface flaws from occurring in a hollow blank that is deformed by piercing-rolling, and can extend its life without requiring a long time for making it.

    摘要翻译: 塞子包括具有凸曲率的前边缘部分; 具有真正或近似圆柱形形状的圆柱形部分; 躯干部分的外径朝向其后缘逐渐增加; 设置在所述插头的后端部的心轴接头; 润滑剂喷射孔,其从所述心轴接头穿过所述躯干部分,所述心轴接头在所述圆筒部分的表面上开口; 以及通过使用铁丝的电弧喷涂而形成在前边缘部分和后端部的基底金属表面上的氧化物和Fe的涂层。 以这种方式,塞子可以防止在通过穿孔轧制变形的中空坯件中发生内表面缺陷,并且可以延长其使用寿命而不需要很长时间来制造它。