Adapted Extrusion Technology for Magnesium Alloys

摘要

The rising efforts for an ecologically harmless capacity increase of technical products and processes not only in the automobile industry result in the renaissance of magnesium within the last years. Therefore a variety of magnesium components are already applied in automobiles. But this is mostly restricted to diecasting components. One reason for this is the extremely limited spectrum of adequate magnesium wrought alloys and above all the extrusion technology for the production of adequate profiles which is not very well explored. Especially in the construction of automobiles, increased attempts are made to apply magnesium in load bearing structures. Therefore it is necessary to develop an adequate and economical material processing for the extrusion of magnesium alloys. Moreover, a process method must also exist which specifically influences the material properties of extruded magnesium profiles. This article gives a general view of the problems and difficulties which are encountered in the extrusion process, as well as in the resulting material properties of extruded magnesium profiles. Furthermore, several possibilities will be described to solve these problems in different ways. Here the examination of the initial materials and their properties, the whole extrusion process as well as the subsequent treatment of the extruded magnesium profiles is very important.