| 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 welding or 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 at least about 1200° C., such as at least about 1500° 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. |
