Fremgangsmåte for fremstilling av ståltråd og tilformet ståltråd, samt anvendelse derav i fleksible rör

摘要

A method for making steel wires, wherein an elongate shaped wire is produced by rolling or drawing steel consisting of 0.05-0.8 % C, 0.4-1.5 % Mn, 0-2.5 % Cr, 0.1-0.6 % Si, 0-1 % Mo, no more than 0.25 % Ni, and no more than 0.02 % S and P, and a first heat treatment is performed on the shaped wire, including at least one step of quenching under predetermined conditions to achieve an HRC hardness of at least 32, a predominantly martensitic and bainitic steel structure and a small amount of ferrite. A shaped wire and a flexible tube for conveying an H2S-containing effluent are disclosed.