University of Oulu

Guo Chen, Kangqiang Li, Qi Jiang, Xinpei Li, Jinhui Peng, Mamdouh Omran, Jin Chen, Microstructure and enhanced volume density properties of FeMn78C8.0 alloy prepared via a cleaner microwave sintering approach, Journal of Cleaner Production, 2020, 121364, ISSN 0959-6526, https://doi.org/10.1016/j.jclepro.2020.121364

Microstructure and enhanced volume density properties of FeMn78C8.0 alloy prepared via a cleaner microwave sintering approach

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Author: Chen, Guo1,2; Li, Kangqiang1,2; Jiang, Qi2;
Organizations: 1Key Laboratory of Green-Chemistry Materials in University of Yunnan Province, Kunming Key Laboratory of Energy Materials Chemistry, Yunnan Minzu University, Kunming, 650500, PR China
2Key Laboratory of Unconventional Metallurgy, Ministry of Education, Kunming University of Science and Technology, Kunming, 650093, PR China
3Process Metallurgy Research Group, Faculty of Technology, University of Oulu, Oulu, 4600, Finland
Format: article
Version: accepted version
Access: embargoed
Persistent link: http://urn.fi/urn:nbn:fi-fe2020040710706
Language: English
Published: Elsevier, 2020
Publish Date: 2022-03-31
Description:

Abstract

Smelting fine ore into a block with the lower phosphorus content before entering the furnace can achieve cleaner production and value-added efficiency for ferromanganese alloy enterprises, and microwave sintering technology shows bright application prospects in the secondary utilization of waste materials and environmental-friendly preparation of high-performance alloy materials. In this work, FeMn78C8.0 grade bulk alloy with enhanced volume density properties was efficiently prepared via an environmental-friendly microwave sintering approach, using high-carbon ferromanganese powder with low processing efficiency in factories as the raw material. Results indicate that adding certain carbon can prevent the oxidation behavior of Mn and Fe elements during the sintering process, and the qualified FeMn78C8.0 alloy can be obtained by controlling sintering temperature and duration time, with the optimum sintering conditions determined at 1168 °C for 11 min and with the alloy powder of <75 μm accounting for 63%. Meanwhile, some fine pores and cracks on the surface of FeMn78C8.0 alloy are conducive to the densification of the alloy sample and the internal alloying process of the carcass, further to enhance the volume density properties; and influence of the powder of <75 μm on the volume density properties is more profound than that by the powder of 75 μm–150 μm. Additionally, a higher value of volume density of 5.86 g cm−3 is obtained at 1200 °C holding for 10 min, far beyond the traditionally produced alloy by electric furnace with an average value of 5.56 g cm−3. The work highlights the efficient application of microwave sintering to the secondary utilization of ferromanganese powder and the environmental-friendly preparation of alloy materials.

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Series: Journal of cleaner production
ISSN: 0959-6526
ISSN-E: 1879-1786
ISSN-L: 0959-6526
Volume: In press
Article number: 121364
DOI: 10.1016/j.jclepro.2020.121364
OADOI: https://oadoi.org/10.1016/j.jclepro.2020.121364
Type of Publication: A1 Journal article – refereed
Field of Science: 218 Environmental engineering
Subjects:
Funding: Financial supports from the National Natural Science Foundation of China (No: U1802255) and Innovative Research Team (in Science and Technology) in University of Yunnan Province were sincerely acknowledged.
Copyright information: © 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/.
  https://creativecommons.org/licenses/by-nc-nd/4.0/