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Licensed Unlicensed Requires Authentication Published by De Gruyter February 19, 2021

Diffusion-alloying sintering of Cr–Mo pre-alloyed iron powders with carbon: The effect of the carbon introduction method on the sinter’s properties

  • Lubomir Anestiev EMAIL logo , Jordan Georgiev , Seryozha Valkanov , Marcela Selecká , Sabine Cherneva and Roumen Iankov

Abstract

The influence of the carbon introduction method on the microstructure and the mechanical properties of sinters produced from iron-based powders by diffusion-alloying sintering has been studied. Two methods of carbon introduction were tested: (1) Premixing of the base powder with graphite, and (2) Coating of the base powder with a carbon-containing substance. The results obtained could be summarized as (1) The microstructure and the mechanical properties depend on the method of carbon introduction; (2) The sinters produced from coated powders possess finer micro-structure, improved homogeneity, and in two out of three of the studied compositions, better mechanical properties. Based on the results obtained, a reasonable assumption was made that the method of carbon introduction affects the dissolution rate of the carbon additive, thus affecting the micro-structure and the mechanical properties of the sinter.


Dr. Lubomir Anestiev, Bulgarian Academy of Sciences, Institute of Metal Science Technologies and Equipment with Hydro- and Aerodynamic Centre 67 Shipchenski Prohod Str. 1574 Sofia, Bulgaria Tel: +359 2 4626 297 Fax: +359 2 4626 202 Web: http://ims.bas.bg/

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Accepted: 2020-02-20
Accepted: 2020-09-23
Published Online: 2021-02-19

© 2021 Walter de Gruyter GmbH, Berlin/Boston, Germany

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