Title:
複合管の製造方法
Document Type and Number:
Japanese Patent JP6696055
Kind Code:
B2
Abstract:
Method for manufacturing a composite tube having at least one double-layered portion with an annular outer layer of a first alloy and an annular inner layer of a second alloy provides a base component of the second alloy, having a central through-hole and an externally threaded section, provides an outer component of the first alloy, having an internally threaded section configured to engage with the externally threaded section, forms a tubular work piece by mounting the outer component around the base component such that the internally threaded section is in engagement with the externally threaded section, and hot works the work piece so that a metallic bond is formed between the threaded sections while the mechanical interlock is maintained, and so that the work piece is elongated and its outer diameter is reduced, thus forming a composite tube.
Inventors:
Ericsson, me
Hell, Henrik
Hell, Henrik
Application Number:
JP2019534355A
Publication Date:
May 20, 2020
Filing Date:
December 22, 2017
Export Citation:
Assignee:
Sandvik Intellectual Property Actie Borag
International Classes:
B21C37/06; B21B45/04; B21B45/06; B21C23/22; B21C37/15; B21D39/04; B23K20/00; C22C38/00; C22C38/06; C22C38/18; C22C38/40; F16L9/02
Domestic Patent References:
| JP8025063A |
Foreign References:
| US4795078 | ||||
| GB897635A | ||||
| DE947063C3 |
Attorney, Agent or Firm:
Sonoda/Kobayashi Patent Business Corporation