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Marine oil is opened by steel bloom continuous casting process
Mooring chain products are mainly used in offshore oil to adopt floating production systems, semi-submersible drilling platforms, single-point mooring structures and floating production storage tankers and other marine development facilities. Due to the long-term immersion of the chain in seawater, the conditions are poor. Therefore, the steel for mooring chain is required to have high strength and toughness, and also requires seawater corrosion resistance, fatigue resistance, and wear resistance.
Due to the high Mn content in the steel, it is necessary to add Al as a refined grain element. The overheat sensitivity and temper brittleness of the steel increase, and the continuous casting billet is prone to longitudinal cracking.