采用60 t BOF-LF-VD-220 mm×220 mm CC-轧制工艺流程成功试制履带链轨节用Φ50 mm 35MnB圆钢(0.35%C,0.28%Si,1.25%Mn,0.0020%B,0.030%Ti)。通过优化BOF出钢[C]≥0.10%和[P]≤0.015%,精炼渣碱度(R)3.87~5.73,软吹时间≥15 min,中间包...
试验的Q345E钢(/%:0.13C,0.23Si,1.45Mn,0.012P,0.005S,0.045V,0.030Nb,0.030Al)的冶炼工艺为100 t EAF-LF-VD-Φ500 mm坯连铸-Φ140 mm材轧制。通过Q345E钢热处理试验得出晶粒度级别对试验钢-40℃冲击功有显著影响;当钢材晶粒度级别为...