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Studies regarding the structural characteristics of sintered alloyed steels with nanometric master alloys

I. G. BUCSE1,* , M. CIOBANU1, O. GHERMEC1

Affiliation

  1. University of Craiova, Faculty of Mechanics, Department of Engineering and Management of Technological Systems, Drobeta Turnu Severin, 220037, Romania

Abstract

In this paper are presented the results of the experimental research on the homogeneity of sintered alloyed steels made of Fe–Mn-Mo-Cr-B master alloy powders. Three types of mixtures containing Fe, Mn, Mo, Cr and B were elaborated by mechanical alloying (MA). The particle size of the powders was about 600 nm. After MA the samples were uniaxially compacted at 600, 700, 800 MPa and sintered at tree different temperatures (1050, 1100 and 1150 °C) in argon atmosphere. The experimental results pointed out that the steels with nanometric master alloys have higher density and structural homogeneity comparative with those obtained by micronical powders. The steel obtained from the homogeneous mixture, sintered at 1150 °C presents a ferrite-pearlite structure (corroborated with 243 HV0.2 respectively 193 HV0.2 hardness). Structural constituent of AM20 steel, sintered at 1150 °C presents a pearlite-bainite structure (corroborated with 290 HV0.2 hardness). MA40 steel sintered at 1150 °C/60 min, presents a pearlite-bainite structure (corroborated with 376 HV0.2 hardness)..

Keywords

Metallurgy, Nanometric master alloys, Structural characteristics, Sintered alloyed steels.

Submitted at: March 25, 2013
Accepted at: July 11, 2013

Citation

I. G. BUCSE, M. CIOBANU, O. GHERMEC, Studies regarding the structural characteristics of sintered alloyed steels with nanometric master alloys, Journal of Optoelectronics and Advanced Materials Vol. 15, Iss. 7-8, pp. 673-678 (2013)