INFLUENCE OF THE PRESSING FORCE ON THE MECHANICAL CHARACTERISTICS OF AN IRON MATRIX OF WATER- DISPERSED POWDERS ALLOYED WITH NICKEL

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  • TITLE: INFLUENCE OF THE PRESSING FORCE ON THE MECHANICAL CHARACTERISTICS OF AN IRON MATRIX OF WATER- DISPERSED POWDERS ALLOYED WITH NICKEL
  • AUTHOR(S): I. Miteva, I. Mitev
  • ABSTRACT: In this publication the influence of the pressing force on the mechanical characteristics of sintered materials based on water-dispersed iron powders alloyed with nickel is studied. An iron matrix based on water-dispersed powders type AHC 100.29, to which up to 4% nickel was added, was studied. After pressing with a force of 300 ÷ 800 MPa, they were sintered at a temperature of 1150ºC for 1h in a dissociated ammonia medium. Experiments were performed to determine tensile strength, yield strength, elongation, Young's modulus, hardness, impact energy and dimensional changes. In determining the mechanical characteristics in order to prevent the influence of porosity, five measurements were made for each type of samples, and in the graphical interpretation of the results the arithmetic mean values were used.
  • PAGES: 47-
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