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COLD STEEL WIRE WITH HIGH FATIGUE STRENGTH AND HIGH RESISTANCE TO HYDROGEN EMERGENCY AND STRENGTHENED FLEXIBLE PIPELINES
COLD STEEL WIRE WITH HIGH FATIGUE STRENGTH AND HIGH RESISTANCE TO HYDROGEN EMERGENCY AND STRENGTHENED FLEXIBLE PIPELINES
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机译:高疲劳强度,高耐氢紧急性和柔性管道的冷钢丝
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摘要
A cold rolled steel wire having the following chemical composition expressed in percent by weight, 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 not more than 0.07% Al, not more than 0.2% Ni, not more than 0.1% Mo and not more than 0.1% Cu, the balance being iron and the unavoidable impurities due to processing. This wire has a microstructure including bainite and, optionally, up to 35% acicular ferrite and up to 15% pearlite. A fabrication method and flexible conduits for hydrocarbon extraction are also provided.
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