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Mechanical properties of Fe-Mo-Mn-Si-C sintered steels
KTH, Superseded Departments, Materials Science and Engineering.
KTH, Superseded Departments, Materials Science and Engineering.ORCID iD: 0000-0002-8494-3983
2004 (English)In: Powder Metallurgy, ISSN 0032-5899, Vol. 47, no 3, 239-246 p.Article in journal (Refereed) Published
Abstract [en]

Four Fe-Mn-Si master alloy powders with the compositions Fe-35%Mn-14%Si, Fe-35%Mn-20%Si, Fe-45%Mn-20%Si and Fe-60%Mn-14%Si were made by the cast milling method, and used to produce Fe-Mo-Mn-Si-C sintered steels. The effects of master alloy composition and sintering atmosphere on the mechanical properties and dimensional change of the sintered steels were studied. The steels were sintered either at 1250 degreesC for 30 min in hydrogen-30% nitrogen or at 1120 degreesC for 30 min in hydrogen and nitrogen-10% hydrogen with different dewpoints. After transient liquid phase sintering, the ultimate tensile strength, yield strength and hardness increase and elongation decreases with increasing contents of manganese and carbon. The dewpoint of sintering atmospheres had little effect on the properties, probably as the addition of manganese and silicon was in the form of a master alloy. The highest tensile strength and smallest dimensional change were obtained in a steel with a composition of Fe-0.85%Mo-1.40% Mn-0-8%Si-0.7%C.

Place, publisher, year, edition, pages
2004. Vol. 47, no 3, 239-246 p.
Keyword [en]
Fe-Mn-Si master alloy, sintered steel, mechanical properties, dimensional change, sintering atmosphere, dewpoint, microstructure, prealloyed iron-powder, dimensional behavior, manganese steels, microstructure, strength, homogenization, temperature
URN: urn:nbn:se:kth:diva-23827DOI: 10.1179/003258904225015572ISI: 000224644000019ScopusID: 2-s2.0-7444230530OAI: diva2:342526
QC 20100525 QC 20110923Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2011-09-23Bibliographically approved

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