The invention relates to the field of
engineering materials, and more particularly discloses a medium-high temperature anti-graphitization economical
electrolytic cell steel and a preparation method thereof. The
electrolytic cell steel comprises the following components of, by weight, less than or equal to 0.14% of C, less than or equal to 0.35% of Si + Al, less than or equal to 1.20% of Mn, lessthan or equal to 0.015% of S, less than or equal to 0.020% of P, less than or equal to 0.50% of Cr + Cu, less than or equal to 0.50% of V + Ti, and the balance Fe and impurities. According to the steel, the problems of
welding seam graphitization, anti-oxidation and low lifetime during secondary maintenance of a
cell shell in a high-
temperature stress state of an aluminum
electrolytic cell are solved, on the basis of an existing material of the aluminum electrolytic
cell, the chemical components of the electrolytic
cell steel are redesigned through the
mutual exclusion effect of alloying elements such as the Si, the Al, the Cr and the V and the influence on high-temperature performance of a steel plate, the electrolytic cell steel has medium-high-temperature-resistant and anti-graphitization characteristics on the basis of
cost control through a controlled-rolling and controlled-cooling process, and provides a low-cost high-performance special steel plate of the electrolytic cell for the electrolytic
aluminum industry, a traditional aluminum electrolytic cell existing material can be replaced, and the cost is saved for the electrolytic
aluminum industry.