Fe-Mn-Si master alloy steel by powder metallurgy processing
2004 (English)In: Journal of Alloys and Compounds, ISSN 0925-8388, Vol. 363, no 02-jan, 194-202 p.Article in journal (Refereed) Published
Fe-Mn-Si master alloy powders were produced by three methods: milling, atomising, and a combination of atomisation and milling. The effects of sintering temperature, time and atmosphere on the properties of sintered steels with these Fe-Mn-Si master alloy powders were studied. The density of the compacts increases with sintering temperature and time. The ultimate tensile strength and hardness increases with sintering temperature and time mainly due to increasing amounts of bainite and martensite after cooling. Elongation is initially raised with sintering temperature and time probably due to improved bonding between powder particles. The compacts with the milled and atomised-milled master alloy showed about the same mechanical properties. On the other hand, the steel with the atomised powder gave lower strength and elongation in both hydrogen and argon-5% hydrogen. Small dimensional changes have been obtained in the steels with milled and atomised-milled Fe-Mn-Si master alloys sintered at 1200degreesC. It was shown that transient liquid phase sintering accelerates the sintering process, which leads to improved mechanical properties.
Place, publisher, year, edition, pages
2004. Vol. 363, no 02-jan, 194-202 p.
alloys, powder metallurgy, mechanical properties, microstructure, premixed manganese steels, liquid-phase formation, sintered steels, al-ti, mechanical-properties, surface composites, grain-refinement, iron, strength, additions
Metallurgy and Metallic Materials
IdentifiersURN: urn:nbn:se:kth:diva-23071DOI: 10.1016/s0925-8388(03)00462-6ISI: 000187796100034ScopusID: 2-s2.0-0344704020OAI: oai:DiVA.org:kth-23071DiVA: diva2:341769
QC 20100525 QC 201110312010-08-102010-08-102011-10-31Bibliographically approved