Research on Extrusion and Heat Treatment Process of Ultra High Strength 7075 Alloy

The effects of different extrusion and heat treatment process on the properties and microstructure of 7075 alloy extrusion bar were studied by electronic universal testing machine and optical microscope,and reasonable extrusion and heat treatment process parameters were determined. The results show that thickness of coarse grain layer and shrinkage defects can be controlled well when extrusion temperature is380 ± 5 ℃,extrusion speed is 0. 5 to...