The Sintering Behaviour of Fe-Mn-C Powder System, Correlation between Thermodynamics and Sintering Process, Mn Distribution and Microstructure

Abstract:

To study of the sintering behaviour of the Fe-0.8Mn-0.5C powder system the cylindrical specimens with a density of ~7.0 g/cc were sintered in container at the temperature of 11200C for 30 min in a gas mixture of 7%H2/93%N2 with the inlet dew point of -600C. The composition (CO/CO2- content) and the dew point of the flowing and “container micro-climate” atmospheres during the whole sintering cycle were monitored. It was shown, that carbothermical reduction and formation esp. CO/CO2 occurs in two different temperature ranges. Three peaks of dew point profile also can be distinguished during sintering cycle. Following sintering the changes of ferromanganese particles, Mn-content distribution and microstructures around the Mn-source were micro-analytical evaluated at cross-section of specimens using the SEM with EDX microanalyses. The results showed that manganese travels through porous iron matrix up to ~60 μm. The type of local microstructure constituents is determined by the local Mn- and C contents.

• Periodical: Materials Science Forum (Volumes 534-536)
• Pages: 761-764
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.534-536.761
• Online since: January 2007
• Authors: Eduard Hryha, Eva Dudrová
• Keywords: Atmosphere Monitoring, Carbothermic Reaction, Fe-Mn-C Systems, Sintering

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