Microstructure behavior and metal flow during continuously extending-extrusion forming of semisolid A2017 alloy
(School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China)
Abstract: A self-designed test machine of continuously semisolid extending extrusion was made to produce the flat bar of A2017 alloy. The slurry of A2017 alloy with spherical or elliptical structures was obtained. During manufacturing semisolid A2017 alloy by the proposed process, the spherical grain was formed with the application of the large force provided by the rough roll. By controlling the casting temperature, the products of A2017 alloy with fine surfaces and rectangular transections of 14 mm×25 mm were produced. The microstructure of the product is fine with the stripped appearance. The fracture strength and elongation of the product are increased by 100 MPa and 29%, respectively.
Key words: A2017 alloy; semisolid alloy; slurry; extending extrusion; flat bar; microstructure