利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

4 条记录 (耗时 0.011 秒)

    Method of making coated tubing
    2.
    发明授权
    Method of making coated tubing 失效
    制作涂层管道的方法

    公开(公告)号：US3073019A

    公开(公告)日：1963-01-15

    申请号：US74220158

    申请日：1958-06-16

    申请人： GEN MOTORS CORP

    发明人： ISADORE CAPLAN ,  RUFLIN GERARD T ,  ZILE DONALD K VAN

    IPC分类号： B21C37/09 ,  B23K1/008 ,  B23K1/08 ,  C23C2/38 ,  C23C14/04

    CPC分类号： C23C14/046 ,  B21C37/09 ,  B23K1/008 ,  B23K1/08 ,  B23K2201/06 ,  B23K2203/04 ,  C23C2/38 ,  Y10T29/49888 ,  Y10T29/49986

    摘要： 860,669. Coating with metals. GENERAL MOTORS CORPORATION. May 13, 1959 [June 16, 1958], No. 16416/59. Class 82(2) [Also in Group XXII] In making brazed and coated steel tubing, a steel strip is progressively rolled into tubular form by passing the strip longitudinally through the rolls, a supply of zinc or zinc alloy is continuously fed into the tubing, the tubing is heated to vaporize the zinc or zinc alloy, and the tubing is immersed in a bath of copper or copper alloy so that the metals form an alloy which coats the interior thereof and brazes the seam. A flat steel strip S if fed from a reel 10 to a mill 12 having rollers 14, 22 and a swaging device 24 to form the strip into circular cross-section. A wire 26 of zinc or zinc alloy is fed by rolls 42 from a reel 40 through a tube 44 into the interior of the tubing before it is fully formed. A non-oxidizing gas is fed through a pipe 30 which enters the tubing at the point of supply of the zinc wire and extends within the tubing towards the swaging device. The formed tubing is heated to above 1665‹F. in a furnace 32 supplied with the non-oxidizing gas and the zinc or zinc alloy is vaporized. The tubing while still in the furnace is passed through a bath 34 of molten copper or copper alloy supplied with wire 54 to automatically maintain a constant level. The molten metal migrates through the seam 16 and forms with the vaporized metal an alloy which coats the inner surface of the tubing. The tubing then passes through a cooling chamber 38 supplied with the non-oxidizing gas. The gas may be by volume 10% carbon monoxide, 18% hydrogen, 4¢% carbon dioxide, 1% methane and balance nitrogen or may comprise nitrogen, helium, argon, carbon monoxide &c.