Structural features of a composite material produced by electric pulsed pressing from iron‑based multi‑component powder mixtures
https://doi.org/10.21122/1683-6065-2023-1-118-125
Abstract
The study is dedicated to the electric pulse pressing use for the composite materials production from diffusion‑alloyed iron powders. It is shown that the addition of a low–melting metal component, tin, has a positive effect on the compaction of the composite iron powder during electric pulse pressing. The density of samples from Dystaloy AB iron powder with the addition of 10 % tin reaches 7.3–7.5 g/cm3. It is impossible to obtain such a density in the conventional cold pressing process at a pressure of 100– 120 MPa. It is established that due to the short duration of thermal exposure during electric pulse pressing, diffusion processes do not have time to pass and the distribution of alloying elements in the iron base is uneven. A short thermal exposure causes oxidation of the surface of the powder particles, which also negatively affects the diffusion processes. Therefore, when obtaining alloyed powder materials by electric pulse pressing, the process must be carried out in a protective atmosphere. The revealed presence of a nanoscale substructure formed due to the effects of intense plastic deformation and temperature indicates the hardening of the powder composite material during electric pulse pressing. These features can be useful in the development of technologies alternative to the warm pressing of plasticized powders.
About the Authors
D. V. MinkoBelarus
Minsk, 65, Nezavisimosti ave.
L. N. Dyachkova
Belarus
Minsk, Belarus, 41, Platonova str.
T. I. Pinchuk
Belarus
Minsk, Belarus, 41, Platonova str.
References
1. Powder Metallurgy / Edited by Dr. Katsuyoshi Kondoh. ‑Intech, 2012, 124 p.
2. Grasso S., Sakka Y., Maizza G. Electric current activated / assisted sintering (ECAS): a review of patents 1906–2008. Science and Technology of Advanced Materials, 2009, no.10, pp.1–24.
3. Beljavin K. E., Mazjuk V. V., Min’ko D.V., Sheleg V. K. Teorija i praktika jelektroimpul’snogo spekanija poristyh poroshkovyh materialov [Theory and practice of electropulse sintering of porous powder materials]. Minsk, OOO “Remiko” Publ., 1997, 180 p.
4. Grigor’ev E. G. Jelektroimpul’snaja tehnologija formirovanija materialov iz poroshkov [Electropulse technology for the formation of materials from powders]. Moscow, Izdatel’stvo MIFI Publ., 2008, 152 p.
5. Kuznechik O. O., Minko D. V., Beljavin K. E. Registration of spark plasma sintering temperature of titanium powders. VII International Conference “Plasma Physics and Plasma Technology”, vol. I. Minsk, Belarus, September 17–21, 2012, Minsk, “Kovcheg”, pp. 80–83.
6. Minko D. V., Beljavin K. E., Kuznechik O. O. Theoretical and experimental estimation of influence skin and pinch effects on spark plasma sintering process of powders. VII International Conference “Plasma Physics and Plasma Technology”. Contributed papers, vol. I. Minsk, Belarus, September 17–21, 2012, Minsk, “Kovcheg”, pp.164–167.
7. Vitjaz’ P.A., Il’jushhenko F. F., Savich V. V. Poroshkovaja metallurgija v mire i v Belarusi: 1990–2010. Sostojanie, problemy, perspektivy [Powder metallurgy in the world and in Belarus: 1990–2010. Status, problems, prospects]. Minsk, Institut poroshkovoj metallurgii GNPO PM NAN Belarusi Publ., Inzhenerija poverhnosti. Novye poroshkovye kompozicionnye materialy. Svarka = Surface engineering. New powder composite materials. Welding, V 2 ch., Ch. 1, 2011, pp. 22–54.
8. Zheleznye i stal’nye poroshki Höganäs dlja proizvodstva poroshkovyh detalej [Höganäs iron and steel powders for the production of powder parts]. Höganäs AV, 2004, 393 p.
9. Strizhakov E. L., Neskoromnyj S. V., Min’ko D. V. Razrjadno‑impul’snaja obrabotka materialov [Discharge‑pulse processing of materials]. Rostov‑na‑Donu, Izdatel’skij centr DGTU Publ., 2016, 201 p.
10. Bernshtejn M. L. Struktura deformirovannyh materialov [Structure of deformed materials]. Moscow, Metallurgija Publ., 1977,
Review
For citations:
Minko D.V., Dyachkova L.N., Pinchuk T.I. Structural features of a composite material produced by electric pulsed pressing from iron‑based multi‑component powder mixtures. Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY). 2023;(1):118-123. (In Russ.) https://doi.org/10.21122/1683-6065-2023-1-118-125