关键词: 冷镦钢SCM435, 盘条, 控轧控冷, 简化退火

Abstract: The  φ5.0~22.0mm  wire  coils  of 0.35C  high  strength  cold  heading  steel  SCM435  with  short-time  annealing were produced at Ma'anshan Iron and  Steel by hot metal pretreating -50 t top and bottom combined blown converter  melting-65 t LF refining -6  strand  140 mm×140 mm billet concasting -SMS high  speed wire coil mill control rolling and  cooling process. The oxygen content in cast billet was  18×10-⁶ by LF refining with Ar stiring,  sealed and argon  shielding casting and electromagnetic stirring. The average tensile strength of wire produced by control rolling and cooling process was  746.5 MPa which lower 200 MPa than that by normal rolling process,therefore the annealing time of wire coil produced by  control rolling and cooling process decreased by 50% than that by normal rolling process.

Key words: Cold Heading Steel SCM435, Wire Coil, Control Rolling and Cooling, Shortened Annealing Time