The Effect of Mn Content on the Structure and Properties of PM Mn Steels

• Autorzy: Tenerowicz M. , Sułkowski M.

Identyfikatory

DOI

10.1515/amm-2017-0318

• Języki publikacji: EN

Abstrakty

EN

The aim of the study was to examine how a reduction of Mn content in PM steels will affect their plastic and strength properties. The results of mechanical, metallographic and fractography tests of sintered (PM) steels containing 1% and 2% Mn are reported and compared with those for 3% Mn PM steel. Höganäs iron powder grade NC 100.24, low-carbon ferromanganese Elkem and graphite powder grade C-UF were used as the starting powders. Powder mixes Fe-(1-2)%Mn-0.8%C were prepared in a Turbula mixer for 30 minutes. Following mixing, “dog bone” compacts were single pressed at 660 MPa, according to PN-EN ISO 2740 standard. Sintering of compacts was carried out in a laboratory tube furnace at 1120°C and 1250°C for 60 minutes in a mixture of 95%N2 – 5%H2 in a semi-closed container. Three types of heat treatment were then used: sinterhardening (cooling rate – 66°C/min), slow furnace cooling (cooling rate 3.5°C/min) and tempering at 200°C. The studies have shown a beneficial effect of the reduction of manganese on plastic properties (up to 7.96%), while maintaining fracture strengths (UTSs) comparable to those of steel with higher contents of manganese. Currently detailed studies of steel containing 1%Mn are conducted.

Słowa kluczowe

EN

sinterhardening; furnace cooling fractography; ductile fracture; brittle fracture; PM Mn steels

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2017
• Tom: Vol. 62, iss. 4
• Strony: 2153--2163
• Opis fizyczny: Bibliogr. 19 poz., rys., tab.

Twórcy

autor

Tenerowicz M.

• AGH University of Science and Technology, faculty of Metals Engioneering and Industrial Computer Science, Al. Mickiewicz 30, 30-059 Kraków, Poland

autor

Sułkowski M.

• AGH University of Science and Technology, faculty of Metals Engioneering and Industrial Computer Science, Al. Mickiewicz 30, 30-059 Kraków, Poland

Bibliografia

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• [4] E. Hryha, L. Nyborg, E. Dudrova, S. Bengtsson, Euro PM2009-Sintered Steels 1-Composition 1, 17-22.
• [5] E. Hryha, Fundamental Study of Mn Containing PM Steels with Alloying Methods of both Premix and Prealloy, PhD Thesis, IMR SAS, Kosice, 2007.
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• [12] M. Sułowski, Archives of Metallurgy and Material 49 (3), 641-670. (2004).
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Uwagi

EN

The financial support of the Ministry of Science and Higher Education under AGH contract no 5.72.110.420 is acknowledged. The authors would like to thank Dr. E. Dudrova, SAS, Kosice, for her help and important comments. The authors would also like to thank Prof. A. S. Wronski for his content-related comments and editing this text.

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).