| 摘要 |
The invention relates to a method for producing welded Cu and Cu alloy pipes in a combined production line, comprising a casting installation for ingoing materials, a hot-rolling mill, a pipe forming and welding installation and a drawing device for the welded pipe. The inventive method is characterized by the following steps: a) a quasi continuous initial strip is cast, b) the cast initial strip is hot-rolled at a rolling speed = casting speed x extension to form an intermediate strip, c) the intermediate strip is cooled at < 100 ~C to room temperature and the surface of the intermediate strip is de-scaled, d) the intermediate strip is cold rolled to from a strip, e) the untrimmed strip is coiled to form bundles with a specific weight, wherein steps a-e occur in an on-line process and the operations indicated below occur directly afterwards or are carried out as subsequent operational steps after intermediate storage: f)the strip is unwound and formed into a longitudinal weld pipe; g) the weld pipe is welded to form a longitudinally welded pipe; h) if necessary, the inside and outside of the pipe is de-burred; i) calibration occurs, followed by the final operation which takes place directly afterwards or after intermediate storage; j) the welded pipe is drawn in at least one drawing stage to form a final pipe, if the welded pipe does not already represent a finished pipe. |
