Method of making high strength hot rolled steel sheet having excellent flash butt weldability, fatigue characteristic and formability

摘要

The invention relates to a hot rolled sheet of steel, a resistance high, having an excellent ability to the butt welding sparking. / p & & p & it possesses a composite structure formed polygonal of ferrite and bainite and it contains of 0,01 has 0,15 by weight of c, of 0,01 is 1,5 by weight of si and of 0,3 has 2,0 by weight, mn, the percentage of surface of the bainite being between 3 and 60. / p & & p & application: sheet steel for automobile bodies.