Sinterability and microstructure evolution during sintering of ferrous powder mixtures
AUTOR(ES)
Demétrio, Kétner Bendo, Klein, Aloisio Nelmo, Schaeffer, Lirio, Consoni, Deise Rebelo, Martinelli, Antonio Eduardo, Bendo, Tatiana
FONTE
Mat. Res.
DATA DE PUBLICAÇÃO
28/05/2013
RESUMO
The present work is focused on ferrous powder metallurgy and presents some results of a development of a suitable masteralloy for use as an additive to iron powder for the production of sintered steels. The masteralloy was produced by melting a powder mixture containing approximately Fe + 20% Ni + 20% Mn + 20% Si + 1% C (wt%), in order to obtain a cast billet that was converted into fine powder by crushing and milling. It was observed presence of SiC in the masteralloy after melting that is undesirable in the alloy. Si element should be introduced by using ferrosilicon. Sintered alloys with distinct contents of alloying elements were prepared by mixing the masteralloy powder to plain iron powder. Samples were produced by die compaction of the powder mixtures and sintering at 1200 °C in a differential dilatometer in order to record their linear dimensional behaviour during heating up and isothermal sintering, aiming at studying the sinterability of the compacts. Microstructure development during sintering was studied by SEM, XRD and microprobe analyses.
Documentos Relacionados
- Evolution of texture and microstructure during thermo-mechanical processingin ultrathin low carbon steels
- Microstructure evolution during the extrusion of a 6351 aluminum alloy tube
- Microstructure evolution of AA7050 Al alloy during Equal-Channel Angular Pressing
- Microwave Sintering of Aluminum-ZrB2 Composite: Focusing on Microstructure and Mechanical Properties
- Microstructure and texture evolution in a magnesium alloy during processing by high-pressure torsion