An integrated approach to solving the technological problem of producing and using self‑fluxing powders from iron‑based alloyed alloys by atomization

The paper discusses the technological principles of producing self-fluxing powders from an iron-based alloyed alloy. The composition of the alloy is substantiated, containing 2–2.5 % carbon; 5–10 % silicon; 10–20 % chromium; 8–10 % tungsten; 3–5 % cobalt; 2–3 % molybdenum; 1–1.5 % vanadium; 1–1.5 % boron. Laboratory trials of melting technologies for a special iron-based alloy were carried out. The practical feasibility of using alloy steel scrap in the charge was demonstrated (Kh13, Kh18N10, R6M5, R18, R10K5F5), as well as scrap from electric heating elements made of nichrome-type alloys. Pilot batches of self-fluxing powder were produced on a laboratory atomization unit. The particle-size distribution and flowability of the powders were studied, and it was found that 65–75 % of the powder falls within fractions suitable for applying coatings by various methods. In the BNTU Laboratory of Laser and Plasma Technologies, the powder was tested for producing wear-resistant coatings on cast “auger” parts made of special cast iron. The experimental self-fluxing powder was shown to exhibit high technological performance in terms of flowability and the machinability of the resulting coatings.

1. Panteleenko F. I., Ljaljakin V. P., Ivanov V. P., Konstantinov V. M. Vosstanovlenie detalej mashin [Machine parts restoration]. Moscow, Mashinostroenie Publ., 2003, 672 p.

2. Alymov M. I. et al. Metallicheskie poroshki. Izdelija iz metallicheskih poroshkov [Metal powders. Products made from metal powders]. Moscow, Vologda: Infra–Inzhenerija Publ., 2021, 560 p.

3. Devojno O. G., Kardapolova M.A., Kalinichenko A. S., Zharskij V. V., Vasilenko A. G. Tehnologija formirovanija iznosostojkih pokrytij na zheleznoj osnove metodami lazernoj obrabotki [Technology for the formation of wear‑resistant coatings on an iron base using laser processing methods]. Minsk, BNTU Publ., 2020, 280 p.

4. Shejnert V.A., Sluckij A. G., Zyk N. V., Guleckij N.A. Tehnologicheskie osobennosti poluchenija lityh zagotovok iz iznosostojkih materialov dlja zashhitnyh pokrytij [Technological features of producing cast blanks from wear‑resistant materials for protective coatings]. Metallurgija: Respublikanskij mezhvedomstvennyj sbornik nauchnyh trudov = Metallurgy: Republican Interdepartmental Collection of Scientific Papers, Minsk, BNTU Publ., 2023, vyp. 43, pp. 145–151.

5. Devojno O. G., Sluckij A. G., Shejnert V.A., Vanjuk Je.A. Issledovanie rezhimov formirovanija zashhitnyh pokrytij iz poroshkov hromokremnievogo chuguna, poluchennyh deformacionnymi metodami i nanesennymi gazoplamennym napyleniem s lazernym oplavleniem [A study of the formation modes of protective coatings from chromium‑silicon cast iron powders obtained by deformation methods and applied by flame spraying with laser melting]. Metallurgija: Respublikanskij mezhvedomstvennyj sbornik nauchnyh trudov = Metallurgy: Republican Interdepartmental Collection of Scientific Papers. Minsk, BNTU Publ., 2023, vyp. 44, pp. 89–100.

6. Panteleenko F. I. [ed.] Uprochnenie i vosstanovlenie poverhnosti detalej. Laboratornyj praktikum [Hardening and Restoring Surfaces of Parts. Laboratory Workshop]. Minsk, BNTU Publ., 2010, pp. 163–168.