从实物断面、金相组织方面分析了Φ140 mm自动轧管机轧辊断裂的原因.结果表明：由于轧辊的化学成分中S元素严重超标和基体组织不正常......

介绍了Φ140 mm自动轧管机组生产薄壁管的工艺、生产、设备现状,指出制约薄壁定尺管一次成材率的关键因素是壁厚精度。通过剪切与......

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-Φ1......