Michal Burchis Schwartz
S.C Laromet S.A, Romania
Title: Failure of an Inconel 718 die used in production of hot copper direct extrusion
Biography
Biography: Michal Burchis Schwartz
Abstract
Steel dies used in copper hot extrusion failed after several extrusion 2-5 tons - during the process of extrusion the die is subjected to high temperatures and stresses and the die failed mainly by plastic deformation. Industry considers new die materials, such as Inconel 718. In this research it was shown that during production using an Inconel 718 die one can extrude 8 times more material (approx. 40 tons). After the extrusion of 40 tons of copper small cracks and plastic deformation on die aperture are seen. The die was discarded and used to investigate die failure mechanisms. By using different investigation methods (optic and scanning electron microscopy, hardness and microhardness tests) microstructure changes were observed.
