Abstract

When a copper billet is heated in the rolling reheating furnace, certain oxides that affect the surface quality may persist on the substrate. This study investigates the effects of heating atmosphere compositions (N₂, O₂, CO₂, and H₂O) and contents on the micro-morphology and phase evolution of the copper oxides. The results revealed that O₂ is the primary factor contributing to the formation of nodules on the copper surface. The primary phase of the exfoliated oxides was CuO attached to Cu₂O, and the nodular oxides also consisted of CuO that directly adhere to copper matrix. Additionally, water vapor can increase the number of Cu₂O particles on the interface between exfoliated oxide and copper matrix, effectively reducing the number of residual nodular oxides. Finally, water vapor and its dissociation products effectively eliminated the pores within the oxide layer and at the oxide–matrix interface, while CO₂ increased the porosity within the oxide layer.

中文翻译：

---

加热气氛组成和含量对氧化铜层物相和形貌分布的影响

摘要

当铜坯在轧制加热炉中加热时，某些影响表面质量的氧化物可能会残留在基材上。_{本研究研究了加热气氛成分（N 2}、O ₂、CO ₂和H ₂ O）和含量对铜氧化物的微观形貌和相演化的影响。结果表明，O ₂是铜表面结瘤形成的主要因素。剥落氧化物的主相是附着在Cu ₂ O上的CuO，球状氧化物也是由直接附着在铜基体上的CuO组成。另外，水蒸气可以增加剥落氧化物与铜基体界面上Cu ₂ O颗粒的数量，有效减少残余球状氧化物的数量。最后，水蒸气及其解离产物有效地消除了氧化物层内和氧化物-基体界面处的孔隙，而CO ₂增加了氧化物层内的孔隙率。