铝合金管挤压时内表面点状擦伤缺陷的研究

Study of Spot Inwall Defect of Aluminium Alloy Pipes during Extrusion

铝合金管材挤压时在其内表面产生的点状擦伤，是无润滑挤压过程特有的一种表面缺陷。利用扫描电镜对这种缺陷进行了研究，分析了其形成机制及影响因素，提出了防止或减少的措施。

The spot inwall defect of aluminium alloy pipes during extrusion is one of the defects that only occur in the process of extrusion without lubrication. By the SEM, this kind of defect is examined. The law and the effect factors of this defect are analyzed. The some methods of decreasing the defect are presented.