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试验钢SCM435(/%:0.33—0.38C,0.15—0.35Si,0.60~0.85Mn,≤0.025P,≤0.025S,0.90~1.20Cr,0.15~0.30Mo)盘条的生产流程为80tBOF—LF-280mm×325mm铸坯-160mm×160mm热轧坯-热连轧成qbl6mm盘条。试验研究了160mm×160mm热轧坯由常规轧制工艺(开轧1060℃,精轧930~950℃,吐丝860~900℃,冷却速度0.5~0.6℃/s)和控轧控冷工艺(开轧1060℃,精轧82