Manganese diffusion coatings of some wrought and sintered steels

Amicarelli, V.; Boghetich, G.; Bocchini, G. F.; Cento, L.

doi:10.1007/bf02833128

Cited by 3 publications

(2 citation statements)

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“…The results shows that for investigated manganese sintered steels manganese travels into iron matrix up to 18 × 10 −6 m in 180 s at the temperature of 1,473 K for both investigated systems. Amicarelli et al [35] studied with the manganese diffusivity phenomena, compared sintered and wrought steels and determined that carbon migrates toward the manganese-rich zone due to the affinity of manganese for carbon. Manganese diffusion is enhanced by alloying elements.…”

Section: Microstructure Developmentsmentioning

confidence: 99%

The Study of Local Effect of Manganese on Microstructure Development of Admixed Fe-Mn-C Sintered Steels

Bidulský

Hryha

Bidulská

2016

High Temperature Materials and Processes

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The present paper is focused on the effect of manganese on microstructure development of admixed Fe-Mn-C sintered steels along with diffusion characteristics of manganese in the iron matrix. Admixed systems were prepared on the base of sponge iron powder, with addition of 0.3% C and 3% Mn added as ferromanganese. Sintering at 1,023, 1,173, 1,323, 1,423 and 1,473 K for 180 s was carried out in laboratory tube furnace in an atmosphere of pure gases mixture 25% N2+75% H2 with the dew point of 243 K. The results show that admixed sintered manganese steels exhibit heterogeneity of microstructure due to the local chemical heterogeneities of these materials, in particular for those areas with a high manganese concentration. On the basis of calculation of manganese apparent diffusion coefficient and penetration depth, results reveal that diffusion-induced grain boundary migration (DIGM) is the dominant alloying mechanism in sintered manganese steels.

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Section: Microstructure Developmentsmentioning

confidence: 99%

The Study of Local Effect of Manganese on Microstructure Development of Admixed Fe-Mn-C Sintered Steels

Bidulský

Hryha

Bidulská

2016

High Temperature Materials and Processes

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“…Ammonium iodide may be intentionally introduced into the semi-closed container to promote the reduction of chromium oxide by manganese vapor. In the system investigated, the following reactions are believed to occur [28] in the semi-closed container:…”

Section: Introductionmentioning

confidence: 99%

Microatmosphere Sintering of Cr–Mn Steel In Furnace Atmospheres of Flowing Hydrogen and Technical Nitrogen

Ciaś

2016

Powder Metall Met Ceram

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A. Cias 1 UDC 621.762:669.15747677 Chromium-containing steels must be sintered in dry atmospheres with low partial pressures of oxygen, such as nitrogen-hydrogen mixtures. The conventional endogas atmospheres have a potential to carburize the main steel and simultaneously oxidize alloying elements, e.g. Cr and Mn, preventing proper sintering. Fe-1.5% Mn-1.5% Cr-0.25% Mo-0.4% C steel is successfully sintered in flowing technical nitrogen by controlling the local microatmosphere, through the use of semiclosed container/getter/activator combinations. Then, the necessary reducing reactions are induced in the dry microatmosphere within and around the specimens. As manganese has a higher affinity for oxygen than chromium, chromium oxide is reduced by relying only on carbon and manganese in the semi-closed container. Mechanical properties of the specimens sintered in technical nitrogen do not significantly differ from those sintered in dry hydrogen.

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Principles of Applying Coatings by Diffusion

Lockington¹

1994

Corrosion

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Manganese diffusion coatings of some wrought and sintered steels

Cited by 3 publications

References 1 publication

The Study of Local Effect of Manganese on Microstructure Development of Admixed Fe-Mn-C Sintered Steels

The Study of Local Effect of Manganese on Microstructure Development of Admixed Fe-Mn-C Sintered Steels

Microatmosphere Sintering of Cr–Mn Steel In Furnace Atmospheres of Flowing Hydrogen and Technical Nitrogen

Principles of Applying Coatings by Diffusion

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