• Title: Defects Affecting Extrusion – Dullness on As-Extruded Surfaces
• Author: Jerome Fourmann
• Author Company: Rio Tinto Aluminum
• Volume: Vol. 75, No. 5
• Year: 2017
• No. Pages: 2.5
• Description: The 20th article in a series, this article addresses the dullness conditions on as-extruded surfaces. Mill finish surface roughness is usually visible at the press and can be encountered in a number of aluminum alloys, such as dilute Al-Mg-Si alloys of theAA6xxx series type. Such conditions typically result in an unacceptable surface and can affect downstream processes, such as anodizing, having a detrimental effect on press recovery and scrap rate. The characteristics, appearance, causes, and remedies for the defect are discussed.
• Companies Mentioned: N/A
Product Code: DEF134SC31