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Effect processing variables on mechanical properties of sintered manganese steels Fe-3%Mn-0.8%C.

Sułowski M., Ciaś A.

Inżynieria Materiałowa

1998

R. XIX, nr 4

1179-1182

The powder metallurgy route may allow sintered manganese steels to be made based on pure iron powder and ferromanganese powder with control over alloy microstructure. The factors that contribute to the mechanical properties of sintered Fe-3%Mn-0,8%C manganese steel, such as the sintering atmosphere, dew point, sintering temperature, cooling rate are summarized. The paper shows the influence of these parameters on the tensile strength, yield strength, transverse rupture strength, impact strength and hardness. It showed that tensile high strength level higher then those of many present sintered steels can be obtained already in the as-sintered condition.

Dimensional changes during sintering of manganese-carbon steel compacts.

Pieczonka T., Mitchell S.C., Ciaś A., Sułowski M., Wronski A.S.

Inżynieria Materiałowa

1998

R. XIX, nr 4

1171-1174

Sintering behaviour in high purity hydrogen of Hoganas NC 100.24 iron powder with carbon and two different types of ferromanganese additions was investigated. The influence of different manganese contents (3.0 and 4.0 wt.-%), type of ferromanganese used (low and high carbon) and isothermal sintering temperature (1120, 1240 and 1300 degrees centigrade) on dimensional changes was investigated by dilatometry. It is shown that the dimensional changes occuring during heating and isothermal sintering and the final density of sintered compacts are influenced by manganese and carbon through their interactions with base iron. The results assist in the choice of industrial sintering conditions when the requirement is very small dimensional changes of compacts for a range of manganese and carbon contents.