Ultrahigh strong steel production process

Ultrahigh strong steel production process, the use of external converter steelmaking process route refining → → → heating → rolling → continuous casting accelerated cooling → heat treatment. The percentage of chemical composition of steel mass is: C = 0.28 ~ 0.30, Si = 0.90 ~ 1.20, Mn = 1.50 ~ 1.60, P≤0.015, S≤0.010, Al≤0.020, Nb = 0.02 ~ 0.03, V = 0.055 ~ 0.065, Ti = 0.045 ~ 0.060, Mo = 0.55 ~ 0.65, B = 0.0017 ~ 0.0022. Steel component design is simple, do not add a large amount of alloying elements, reducing the production cost ultra strong steel; using Ti oxide metallurgy technology to improve the weldability of steel; steel sheet by Q + P after tissue processing superfine lath Markov body + nanoscale lath austenite and carbide precipitated complex, the overall performance is better than plastic and steel strength dual-phase steel, TRIP steel and general martensitic steel; steel after quenching roller quenching machine, board type well; process is simple, easy to implement technology to solve the traditional quenching, tempering production problems can not be ultra-strong steel, to achieve mass production of ultra High Strength 1800MPa grade steel.