Plug, Piercing-Rolling Mill, and Method of Producing Seamless Tube by Using the Same
    3.
    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。

    Plug, piercing-rolling mill, and method of producing seamless tube by using the same
    4.
    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 Pipe
    9.
    发明申请
    Method for Producing Seamless Pipe 审中-公开
    无缝管生产方法

    公开(公告)号:US20110023569A1

    公开(公告)日:2011-02-03

    申请号:US12884983

    申请日:2010-09-17

    IPC分类号: B21B19/04

    摘要: Disclosed is a method for producing a seamless pipe by using a piercing mill which pierces and rolls a round billet heated to 1300° C. or lower, wherein the piercing mill is composed of a pair of skew rolls disposed to face each other around a pass line, a pair of guide devices disposed to face each other around the pass line, and a plug disposed along the pass line, between the pair of the skew rolls and also between the pair of the guide devices, wherein the piercing-rolling is performed under the conditions satisfying the following formulas (1) to (3) to prevent wrinkle flaws of the seamless pipe: −1.0

    摘要翻译: 本发明公开了一种通过使用对加热到1300℃以下的圆钢坯进行穿孔和轧制的穿孔机来制造无缝管的方法,其中,所述穿孔机由一对设置成围绕一圈的倾斜辊组成 一对引导装置被设置为围绕传送线路彼此面对,以及沿着传输线设置在一对扭斜辊之间以及一对引导装置之间的插头,其中执行穿孔轧制 在满足下列公式(1)至(3)的条件下,以防止无缝管的褶皱缺陷:-1.0 <&Dgr;&Thetas; (1)&Dgr;&thetas; =&thetas; p-&thetas; r(2)-0.37×&Dgr;&Thetas; + 1.47&nlE; Rn&nlE; 0.37×&Dgr;&Thetas; +2.67(3) 上述公式如下:&rd; r:在主辊的进给角度为零的情况下,通过线与主辊面之间的半角(°); p:半角(° )插头线圈和卷绕部分之间Rn:插头的卷绕次数

    Method for manufacturing seamless steel pipe made of high Cr-high Ni alloy steel
    10.
    发明授权
    Method for manufacturing seamless steel pipe made of high Cr-high Ni alloy steel 有权
    制造高Cr高镍合金钢无缝钢管的方法

    公开(公告)号:US07866199B2

    公开(公告)日:2011-01-11

    申请号:US12457978

    申请日:2009-06-26

    IPC分类号: B21D31/00

    摘要: a billet made of high Cr-high Ni alloy, which contains, by mass percent, 20 to 30% of Cr, 30 to 50% of Ni, and at least one element selected from Mo and W with a value “Mo+0.5W” of 1.5% or more is heated under conditions satisfying the following formula (1), and then the billet is pierced and rolled using an inclined roll type piercing mill with a roll gouge circumferential speed of 2.28 m/sec or higher. This prevents melted rash on the inner surface and lengthens the plug life. T≦1575−4.45×Vf−104.7×{−ln(th/ro)}  (1) wherein T indicates a heating temperature (° C.) of the billet, Vf indicates the roll gouge circumferential speed (m/sec), ro indicates a radius (mm) of a billet at an entry-side, and th indicates a radial thickness (mm) of a pipe after piercing.

    摘要翻译: 由高Cr高Ni合金制成的坯料,其以质量%计含有20〜30%的Cr,30〜50%的Ni,以及选自Mo和W中的至少一种元素,其值为“Mo + 0.5W 在满足下述式(1)的条件下加热1.5%以上,然后使用辊式圆周速度2.28m /秒以上的倾斜辊式穿孔机对坯料进行穿孔和轧制。 这可以防止内表面出现熔化的皮疹,并延长插头的使用寿命。 Tnn; 1575-4.45×Vf-104.7×{-ln(th / ro)}(1)其中T表示钢坯的加热温度(℃),Vf表示轧辊圆周速度(m / sec) ro表示入口侧的坯料的半径(mm),th表示穿孔后的管的径向厚度(mm)。