Correlation of Temperature-speed Extrusion Parameters, Tool Design and Quality of Profiles of Magnesium Alloys  Full text 

O. Golovko¹, V. Danchenko¹, M. Schaper²

¹Department of metal forming, National metallurgical academy of Ukraine
4 Gagarin Ave., Dnipropetrovsk, 49600, Ukraine  
² Institute of materials science, Leibniz University of Hanover 
An der Universität 2, 30823 Garbsen, Germany

UDC 621.7

Metall. Min. Ind.,  2011, Vol. 3, No. 7, pp. 23-31

Abstract

Experimental investigation of the extrusion process of Mg-Al-Zn-Mn and Mg-Ca magnesium alloys with different tools and extrusion conditions had been carried out. The effect of pocket or porthole die design, deformation and temperature-speed extrusion parameters on temperature of the strips and tubes of alloy AZ31B, grain size, mechanical properties and stability of the geometric dimensions along the profile as well as weld quality in tubes had been investigated. The influences of calcium content, temperature conditions and extrusion ratio on the extrusion force, mechanical properties and structure of small-diameter tubes with wall thickness 0.4 to 0.7 mm of Mg-Ca alloys had been established.

Keywords: EXTRUSION, MAGNESIUM ALLOY, AZ31B, MG-CA, STRIP, TUBE, POCKET DIE, PORTHOLE DIE, MANDREL