Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Influence of Pore Size on Toughness of Fe-Mo-Cu-C Sintered and Carburized Components

Version 1 : Received: 24 January 2021 / Approved: 25 January 2021 / Online: 25 January 2021 (11:41:21 CET)

How to cite: Takashita, T.; Kabayashi, A. Influence of Pore Size on Toughness of Fe-Mo-Cu-C Sintered and Carburized Components. Preprints 2021, 2021010487 (doi: 10.20944/preprints202101.0487.v1). Takashita, T.; Kabayashi, A. Influence of Pore Size on Toughness of Fe-Mo-Cu-C Sintered and Carburized Components. Preprints 2021, 2021010487 (doi: 10.20944/preprints202101.0487.v1).

Abstract

The influence of pore size on the toughness of Fe-Mo-Cu-C sintered and carburized components was investigated. The charpy impact value of the component made from Fe-0.4%Mo diffusion-alloyed steel powder mixed with 2%Cu powder and 0.3% graphite powder significantly increased with a decrease in pore size. The highest impact value of 17 J/cm2 was obtained at the average pore size of 12 µm. This value was 25% higher than that of the sintered and carburized component made from conventional Fe- 4%Ni-1.5%Cu-0.5%Mo alloyed steel powder called 4Ni even though the component was made from a Ni-free alloyed steel powder. The mechanism of the improvement of the impact value by pore size refinement and the influence of microstructural difference between the components made from Fe- 0.4%Mo diffusion-alloyed steel powder and 4Ni on toughness is discussed based on optical microstructural observation and crystal orientation analysis data.

Subject Areas

Sintering; Carburized

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