7B04-T6铝合金型材黑色条纹的原因分析

Analysis about causes of black stripe of 7B04-T6 alloy DQ2544 profiles

通过对7B04-T6铝合金DQ2544型材外观形貌、断口组织特征、显微组织特征、扫描电镜特征等几方面进行系统地观察,并结合生产工艺的特点,找出7B04-T6铝合金型材黑色条纹产生的原因,对其形成机制进行了阐述,为改善产品质量提供了依据,提出了避免该缺陷的方法。

Some 7B04-T6 aluminium alloy DQ2544 extrusion profiles had been systematically observed in the ways as the appearance of the surface, and the features of their fracture and microscopic structures, and of electronic scanning. Combination with the features of the process of production, the reasons for the appearance of the holes and the and the black stripe ways to eliminate it had been found out. In addition, the mechanism of forming the cracks and precautions to address them have been depicted, it provides some bases for improving the quality of the production.