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Research on the surface densification of sintered steels

A. CALOPEREANU1, C. NICOLICESCU1,* , V. NICOARĂ1

Affiliation

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

Abstract

Surface densification of sintered steel parts has effects in terms of increasing of the fatigue and wear resistance and is currently conducted by shocks with balls (shot peening) or rolling. This paper presents the results of a new method of surface densification of sintered steels namely densification by cold plastic deformation using planetary ball mill. Sintered steel with 0,15%C and 0,25%C were subjected to surface densification using a Pulverisette 6 planetary ball mill with three rotational speeds of 150, 250 and 350 rpm for 5, 15 and 20 minutes at each rotation. It was analyzed the effect of the densification process on the roughness, thickness and the characteristics of the densified layers respectively the behavior of the densified steels to impact tests..

Keywords

Sintered steel, Shot peening, Porosity, Impact test.

Submitted at: May 20, 2015
Accepted at: Oct. 28, 2015

Citation

A. CALOPEREANU, C. NICOLICESCU, V. NICOARĂ, Research on the surface densification of sintered steels, Journal of Optoelectronics and Advanced Materials Vol. 17, Iss. 11-12, pp. 1826-1833 (2015)