INFLUENCE OF HOT FORGING ON THE STRUCTURE AND PROPERTIES OF POWDER COMPOSITES OF THE Fe-FKh800–TiB2 SYSTEM

Abstract

The results of the influence of the deformed state of the material during hot stamping on the structure and physical and
mechanical properties of powder composites of the Fe-Cr-C system are presented. The analysis of the deformed state of the
material was carried out on the basis of modeling the process of hot stamping of a porous workpiece in an open die. The
modeling was carried out by the finite element method using the DEFORM 2D/3D software package. The modeling results
made it possible to establish the distribution of stress intensity and evaluate the deformed state of the material. It was found that
in the implemented scheme, the determining component of the deformation is the radial component. Also, it is the radial
component that has a direct impact on the formation of zones of low material flow in the forging volume. According to the
results of modeling and local microscopy, the influence of the deformation intensity on the microstructure of the composites
was established. Analysis of the microstructure of the studied composites showed that during deformation according to the
proposed scheme, only the compaction of the composite occurs without significant strain hardening due to the absence of
obvious plastic flow of the material. However, a homogeneous structure is obtained, which indicates a low anisotropy of the
mechanical properties of the material. The resulting composites showed high physical and mechanical properties.