PHYSICAL, CHEMICAL AND STRUCTURAL CHARACTERISTICS OF SINTERED HARD ALLOYS OBTAINED BY MEANS OF POWDER METALLURGY

Powder metallurgy supports the obtaining of certain materials such as alloys or pseudo-alloys from metals entirely immiscible, leading in the same time to associations of materials possessing different characteristics necessary to some current top industry branches. Under the circumstances of its techniques and fabrication technologies, this metallurgy branch is one of the few ecological ones, virtually lacking wastes and which does not use polluting fusing agents. The current paper intends to study some of the physical, mechanical, chemical and structural characteristics of hard sintered alloys from selected systems of P 30 S and K 30, among which we can mention: density of sintered sample, bending fracture strength. Vickers hardness, sintering shrinkage, metallographic analysis, microstructure.