graduate student
Bryansk, Bryansk, Russian Federation
employee
Bryansk, Bryansk, Russian Federation
The study objective is to evaluate the effect of silicon concentration on modifying cast iron with frake graphite from the point of view of melt heterogenization. The task to which the paper is devoted is to analyze the results of microstructural and electron probe microanalysis of gray antifriction cast iron samples of SHM and A-HMM grades, experimentally obtained using silicon-based modifiers of different concentrations of 68-72% and 73-75%. Research methods: theoretical analysis of the literature on the subject of the study, experimental studies of modifier compositions with different concentrations of silicon, practical determination of sample hardness, microstructural studies, microrentgenospectral analysis. The novelty of the work: the hypothesis of melt heterogeneity after modification and the formation of finely dispersed graphite in areas with high silicon content is experimentally confirmed. Research results: Practical results make it possible to prove that the silicon concentration has a significant effect on the crystallization of low-sulfur gray cast iron. Analysis of the characteristic X-ray spectrum of the graphite phase confirmed the presence of silicon on the spectrum in samples with the best structure and properties obtained using modifiers with a high silicon content of 73-75%, which confirms the hypothesis of melt heterogeneity after modification and the formation of finely dispersed graphite in areas with a high silicon content.
grey cast iron, frake graphite, melt, modification, structuring, ferrosilicon
1. Skaland T. Technical information on the use of ELKEM ASA modifiers for the production of iron castings with various graphite forms. 2004.
2. Sherman AD, Zhukov AA. Cast iron: handbook. Moscow: Metallurgiya; 1991.
3. Khudokormov DN. The role of impurities in graphitization of cast iron. Minsk: Nauka I Tekhnika; 1968.
4. Zhukov AA, Snezhnoy RL, Girshovich NG, Davydov SV. On the sub micro heterogenic structure of cast iron. Foundry. Technology and Equipment. 1980;6:3-4.
5. Kimstach GM. On the modification of low-silicon graphitic Fe-C alloys. Foundry. Technology and Equipment. 1992;8:5.
6. Kimstach GM. Synthetic iron. Blanking Production in Mechanical Engineering. 2007;12:7-14.
7. Popel PS. Metastable micro-stratification of liquid alloys and its effect on the casting structure. Foundry. Technology and Equipment. 1992;7:3-6.
8. Tsepelev VS, Sinitsin NI, Chikova OA, Potapov MG, Vyukhin VV. Microheterogenic structure of liquid cast iron IChKh28N2 and ICh310Kh24M2F4TR. Izvestiya. Ferrous Metallurgy. 2024;5:279-292.
9. Zhukov AA, Dobrovolsky II. Theoretical substantiation of the criteria for the propensity of cast iron to graphitization. Foundry. Technology and Equipment. 1982;6:3-5.
10. Zhukov AA, Ilyinsky VI, Zhiguts YuYu, Kostyleva LV. Interaction and mass transfer in liquid cast iron. Foundry. Technology and Equipment. 1986;2:7-8.
11. Anastasiadi GP. Chemical microuniformity in foundry alloys. Foundry. Technology and Equipment. 1992;6:6-7.
12. Gavrilin IV. Carbon distribution in liquid cast iron. Foundry. Technology and Equipment. 1982;4:2-4.
13. Gavrilin IV, Korogodov YuD, Tikhonov NP, Sharshin VN. Equilibrium chemical heterogeneity in liquid casting alloys. Foundry. Technology and Equipment. 1986;1:3-5.
14. Panov AG, Mukhametzyanova GF. On the structure of cast iron melts. Metallurgiya Mashinostroeniya. 2014;5:6-12.
15. Kimstach GM, Drapkin BM, Urtaev DA, Kimstach IG. On the problem of the silicon role as a modifier of cast iron. Foundry. Technology and Equipment. 2008;7:12-13.
16. Hosen R, Litvinenko AN, Mostovoy NI. The influence of silicon on the structure and properties of modified iron-carbon melts. Foundry. Technology and Equipment. 1977;9:1-12.
17. Silman GI. Thermodynamics and thermokinetics of structure formation in cast irons and steels. Moscow: Mashinostroenie; 2007.
18. Sazonov VO, Pamfilov EA. Research methods and experimental installations for evaluating tribotechnical characteristics of piston rings. New Materials and Technologies in Mechanical Engineering. Bryansk; 2023. p. 93-96.
19. Sazonov VO, Makarenko KV, Vdovin AV. Evaluation of the correlation between hardness and structure of alloyed cast iron with flake graphite used for manufacturing piston rings. Transport Engineering. 2025;2:64-76.
20. Zhukov AA, Snezhnoy RL. On the low rate of mass transfer and structural changes in liquid modified cast iron. Foundry. Technology and Equipment. 1976;11:4-5.
