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氧化铁皮的起泡行为发生在热轧过程,当铁皮发生起泡现象时,铁皮界面气体压力增加造成铁皮被顶起,在热轧轧制中起泡的铁皮被碾碎易于形成麻点和铁皮压入缺陷。通过热重分析手段和扫描电镜微观观察研究了超低碳钢、超低碳含磷钢、低碳钢、中碳钢在加热过程中铁皮的起泡行为,重点探讨了磷和碳元素对铁皮起泡行为的影响。研究表明,在980℃附近磷元素形成Fe3(PO4)2,此相高温下易于熔融气化造成铁皮起泡;在1 050℃以上的高温区间,碳元素活性增高,随着铁皮生长界面碳元素的富集氧化,形成CO和CO2对铁皮起泡影响明显,高温试样铁皮气孔和裂纹密集。
The foaming behavior of scale has occurred during the hot rolling process. When foaming occurs on the scale, the gas pressure is increased at the interface of the scale to cause the scale to be lifted. The blistered sheet metal is crushed easily during hot rolling to form pitting and sheet metal Press into the defect. The foaming behaviors of the sheet metal during the heating process of ultra-low carbon steel, ultra-low carbon phosphorus-containing steel, low carbon steel and medium carbon steel were investigated by means of thermogravimetric analysis and scanning electron microscopy. The effects of phosphorus and carbon on iron Influence of bubbling behavior. The results show that the formation of Fe3 (PO4) 2 at 980 ℃ is easy to melt and gasify at high temperature, resulting in the foaming of the metal skin. At high temperature above 1050 ℃, the activity of carbon increases with the increase of carbon element Enriched and oxidized, the formation of CO and CO2 had a significant effect on the blistering of the metal skin, and the stomatal and crack of the hot metal sample was intensive.