| 摘要 |
The invention relates to a method of providing a duplex stainless steel strip for an armouring layer of a flexible pipe, said method comprising - providing at least two duplex stainless steel pieces each having an end-face, - welding said end-faces of said two pieces of duplex stainless steel together to form a welded interface section using resistance welding, such as dual upset weldingor flash welding, and - providing a controlled cooling of said welded interface section. The duplex stainless steel strip should preferably be heated to a temperature of at least about 1100 °C, preferably atleast about 1200 °C, such as at least about1500 °C in said interface section, and the controlled cooling of said welded interface section preferably comprises prolonging the cooling of the interface section preferably at least for the cooling from about 800 °C to about 600 °C, more preferably at least for the cooling from about 1100 °C to about 600 °C. |
