利用工业氢对热轧带钢表面氧化铁皮进行还原,随后在不同润滑条件下对该带钢进行了五道次冷轧,采用扫描电镜、粗糙度仪研究了冷轧前后试样的表面形貌和表面粗糙度.结果表明：随着轧制道次的增加,试样表面的大部分裂纹、气孔及气泡被逐渐压平,表面粗糙度降低；五道次冷轧后,干摩擦条件下试样表面缺陷的压平轧合程度最好,液压油润滑下的最差；在三种润滑条件下试样表面均有裂纹痕迹残留,液压油润滑下的裂纹痕迹最多,干摩擦条件下还存在较为明显的辊痕；干摩擦条件下试样表面粗糙度最小,为0．065μm,液压油和乳化液润滑下的表面粗糙度分别为0．089μm 和0．076μm.
The surface oxide scales of the hot rolled strip steel were reduced using industrial hydrogen,and then the strip steel was cold rolled in five passes under different lubrication conditions.The surface morphology of the specimens before and after cold rolling was studied by scanning electron microscopy and the surface roughness tester.The results show that most of the cracks,pores and bubbles on the specimen surface were gradually roll-flattened and the surface roughness decreased with the increase of rolling passes.After cold rolling in five passes, the roll-flattening level of the surface defects of the specimen was the highest under the dry friction condition and the lowest under the hydraulic-oil lubrication condition.The crack traces were retained on the specimen surface under the three lubrication conditions and the most retained traces were observed under the hydraulic-oil lubrication condition.The roller marks were also observed clearly under the dry friction condition.The surface roughness of the specimen under the dry friction condition was with the lowest value of 0.065 μm,and that under the hydraulic-oil and emulsion lubrication condition was 0.089 μm and 0.076 μm respectively.
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