Gradient tool WC/HS6-5-2 materials produced using the powder metallurgy method

摘要

Purpose: The goal of this work is development of the new group of the gradient cermets with the high-speed steel matrix, reinforced with the hard carbides phases of the WC types.Design/methodology/approach: The materials were fabricated using the conventional powder metallurgy method, consisting in compacting the powder in a closed die, and subsequent sintering. All the sintered test pieces were subjected to examination of density and hardness; observations were also made using the scanning electron microscope (SEM), equipped with the back-scatter electrons detector (BSE) and the dispersive energy analyser (EDAX D4).Findings: The density of the compacted and sintered test pieces grows along with the sintering temperature increase. The HRA hardness of the compacted and sintered test pieces grows along with the sintering temperature increase. It was noted that application of a longer sintering time results in slight hardness lowering.Practical implications: Developed material is tested for turning tools.Originality/value: The material presented in this paper has layers consisting of the carbide-steel with growing hardness on one side, and on the other side the high-speed steel, characterized by a high ductility