| 摘要 |
The invention relates to a cold-rolled wire made from steel having the following chemical composition, expressed in weight percent: 0.2 ≤ C ≤ 0.6, 0.5 ≤ Mn ≤ 1.0, 0.1 ≤ Si ≤ 0.5, 0.2 ≤ Cr ≤ 1.0, P ≤ 0.020, S ≤ 0.015, N ≤ 0.010, and optionally no more than 0.07% AI, no more than 0.2% Ni, no more than 0.1% Mo, and no more than 0.1% Cu, the remainder being iron and inevitable impurities resulting from production. The wire has a microstructure comprising bainite and optionally up to 35% acicular ferrite and up to 15% perlite. The invention also relates to the production method and to flexible pipes incorporating same that are used for the exploitation of hydrocarbons. |
