Journals →  Chernye Metally →  2021 →  #1 →  Back

Casting and Foundry Production
ArticleName Investigation of the modification effect on performance properties of cast iron molds
DOI 10.17580/chm.2021.01.04
ArticleAuthor V. A. Gulevskiy, S. N. Tsurikhin, V. V. Gulevskiy, N. Yu. Miroshkin

Volgograd State Technical University (Volgograd, Russia):

V. A. Gulevskiy, Cand. Eng., Associate Prof., Dept. of Machines and Technology of Foundry Production, E-mail:
S. N. Tsurikhin, Associate Prof., Dept. of Machines and Technology of Foundry Production
V. V. Gulevskiy, Post-graduate Student, Dept. of Theoretical Mechanics
N. Yu. Miroshkin, Post-graduate Student, Dept. of Machines and Technology of Foundry Production


Research is devoted to the influence of the technological method of modifying gray cast iron for the manufacture of steel casting molds. Heavy operation imposes stringent requirements both on the design of molds and on the materials from which they are made. They reliably withstand the effects of steel poured into them, having a temperature of 1600–1700 °C, thermal shock, which is directly proportional to this temperature, as well as significant effects of cyclic thermal stress and deformation. Specific operating conditions of molds (high heating temperature, their installation on movable and stationary ditches, intensive traffic flows, etc.) complicate the necessary processes directly during their operation. Modeling geometric shapes on a scale of geometric similarity 1:10. Tests were carried out on molds cast from cast iron for consumable electrodes, modified with ferrosilicon (FS65 GOST 1415-93), primary aluminum A99 (GOST 11069-2001), vanadium slag (SHVD-1 TU14-11-178-86), FSB-30) and silicomishmetal (SIMISH-1). These modifiers were chosen for modification, as they are widely used in production. Thus, the conducted studies of the nature of the deformation of the walls of the molds and the stress-strain state on models made of gray and modified cast iron make it possible to assess the advantages and disadvantages of the resulting structure and shape of graphite. Further, the methods of the rational formula of the outer surface of profiled and sheet molds are used, having predetermined the nature of destruction in advance. The use of thin-walled used rational forms can significantly reduce their specific consumption. The study of the quality of the metal cast into the experimental curved outer surface showed that the macrostructure of the metal of the experimental and ordinary ingots is the same.
The work was attended by N.V Markina, senior lecturer at the Dept. of Machines and Foundry Technology, Volgograd State Technical University.

keywords Gray cast iron, modified, mold, cast iron mold models, thermal stress, deformation

1. Kuksa А. V. Cast iron steel casting molds. Moscow: Metallurgiya, 1989. 152 p.
2. Kostyleva L. V., Ilinskiy V. А., Gabelchenko N. I., Pozharskiy А. V., Gulevskiy V. А. Study of cooling modes for cast iron castings. Liteynoe proizvodstvo. 1999. No. 2. pp. 9–11.
3. Leushin I. О., Korovin V. А. Relation between modification and graphitization processes in cast iron. Chernye Metally. 2010. No. 7. pp. 30–32.
4. Górny M., Tyrała E. Effect of cooling rate on microstructure and mechanical properties of thin-walled ductile iron castings. J. Mater. Eng. Perform. 2013. Vol. 22, Iss. 1. pp. 300–305.
5. Vdovin K. N., Gorlenko D. A., Zavalischin A. N. Study of the effect of isothermal holding on parameters of graphite phase in indefinite chromium-nickel cast iron alloyed by nitrogen and vanadium. CIS Iron and Steel Review. 2019. Vol. 17. pp. 30–33.
6. Tadesse A., Fredriksson H. Volume change during the solidification of grey cast iron: its relation with the microstructural variation, comparison between experimental and theoretical analysis. International Journal of Cast Metals Research. 2017. Vol. 30. No. 3. pp. 159–170.
7. Hong Nga P. T., Ngoc Thien T., Pritadewi P. J., Phuong V. N. Y. Research on Factors Influencing the Formation Graphite and Effect of Graphite on Mechanical Properties of Grey Cast Iron. International Conference on System Science and Engineering (ICSSE) (Dong Hoi, Vietnam. 20–21 July 2019). 2019. pp. 619–629.
8. GOST 1415–93. Ferrosilicium. Specification and conditions of delivery. Introduced: 01.01.1997.
9. GOST 11069–2001. Primary aluminium. Grades. Introduced: 01.01.2003.
10. Technical Specification 14-5-160–2006. Modifiers with barium (ferrosilicobarium) FS65Ba4, FS60Ba22, FS70Ba5 (analogue of SB5 and Barinoc).
11. Technical Specification 14-5-24–73. Alloys with rare earth metals on the iron-silicon basis. Technical conditions.
12. Technical Specification. Vanadium slag.
13. Theuwissen K., Lacaze J., Laffont L. Structure of graphite precipitates in cast iron. Carbon. 2016. Vol. 96. No. 1. pp. 1120–1128.
14. Davydov S. V., Boldyrev D. А., Skantsev V. М. Modification of graphitized structural cast irons. Bryansk: BGTU, 2015. 113 p.
15. Boldyrev D. A., Popova L. I., Davydov S. V. Basic parameters of the process of obtaining ductile iron. Chernaya metallurgiya. Bulleten nauchno-tekhnicheskoy informatsii. 2018. No. 4. pp. 95–99.
16. Davydov S. V., Boldyrev D. A., Skantsev V. M., Popova L. I. Structural cast irons with graphite of compact shapes. Vestnik Bryanskogo gosudarstvennogo tekhnicheskogo universiteta. 2015. No. 3. pp. 24–29.
17. Monastyrskiy А. V., Smykov А. F., Ponkratov V. А., Soloviev M. B. Prediction of hot cracking and warpage calculation of castings in the PoligonSoft computer modeling system for foundry processes. Liteynoe proizvodstvo. 2009. No. 10. pp. 27–30.
18. GOST 7164–78. SSI self-balancing servoinstruments. General specifications. Introduced: 01.01.1980.
19. GOST 3443–87. Cast iron castings with graphite of different form. Methods of structure determination. Introduced: 01.07.1988.
20. GOST 27208–87. Cast iron castings. Methods of mechanical testing. Introduced: 01.01.1988.

Language of full-text russian
Full content Buy