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Rolling and Other Metal Forming Processes
ArticleName The effect of temperature and structure of a round billet on the split behavior of grinding balls
ArticleAuthor I. K. Galimyanov

Nizhniy Tagil Iron and Steel Works — “EVRAZ NTMK” JSC (Nizhniy Tagil, Russia):

I. K. Galimyanov, Leading Engineer of Technical Department, Head of the Technological Office of the Heavy-section Shop, e-mail:


The data and results of the study of the effect of the bar macrostructure on the quality of grinding balls have been presented. In the manufacture of grinding balls, the round bar is used. When rolling on a ball rolling mill (BRM), metal deformation occurs in rolls with helical grooves at the two grinding balls production areas: at the BRM of a heavy-section shop (HSS) and at the BRM of a rail and beam shop (RBS). Descriptions and differences in the composition of main equipment and the technological production process at different areas have been given. The aim of the study is to research the infl uence of the bar macrostructure on the quality and performance of grinding balls. When producing grinding balls from continuously cast billets (CCB) without degassing at the HSS BRM, there were no cracks and splits. When producing grinding balls from CCBs without degassing at the RBS BRM, cracks and splits of the balls were detected during impact testing of the balls. Flakes were detected in the macrostructure of balls and their bar. When passing balls through a quenching unit and after complete cooling, the martensitic structure of the metal in the presence of flakes results to an increase of internal cracks and cracking of the balls. The technological parameters of the production of grinding balls have been given.

keywords Grinding balls, macrostructure, flakes, quenching, tempering, ball rolling mills

1. Krutilin А. N., Bestuzhev N. I., Bestuzhev А. N., Kalenkovich D. N. Grinding bodies. Issues. Prospects. Lityo i metallurgiya. 2009. No. 4(53). pp. 26–33.
2. Kiryushin А. V.., Shestakov I. А. Effect of balls hardness on ore reduction in ball mills. Obogashchenie rud. 1990. No. 5. pp. 3–4.
3. Stalinsky D. V., Rudyuk А. S., Soleny V. К. Selection of materials and technologies for heat treatment of grinding balls mainly exploiting in conditions of abrasive wear. Stal. 2017. No. 6. pp. 64–69.
4. GOST 7524-2015. Grinding steel balls for ball mills. Specifications. Introduced: 01.11.2016.
5. Serov А. I., Smirnov Е. N., Sklyar V. А., Belevitin V. А. Industrial tests of grinding balls with increased hardness when ferruginous quartzite reduction. Obogashchenie rud. 2017. No. 3. pp. 3–4.
6. Umansky A. А., Golovatenko А. V., Shchukin А. G., Simachev А. S. Research of influence of quenched microstructure parameters of grinding balls produced by the helical rolling method on their operational performance. Proizvodstvo prokata. 2019. No. 3. pp. 34–39.
7. Ignatov V. А., Soleny V. K., Yarmolenko А. I. et. al. Selection and development of a rational form for a grinding body to reduce raw materials. Metall i lityo Ukrainy. 2002. No. 1-2. pp. 23–27.
8. Zelikovich A. Ya., Tokmakov А. М. Improvement of quality of balls after heat treatment. Stal. 1994. No. 2. pp. 64–65.
9. Kuzmin V. О. Eff ect of the mode of thermostrengthening on volumetric wear resistance of grinding balls made of low-alloyed steel grades. Vestnik Priazovskogo gosudarstvennogo tekhnicheskogo universiteta. 2011. No. 2(23). pp. 117–126.
10. Chizh Е. V., Abenova М. B. Selection and analysis of the technology for production of grinding balls. Teoriya i tekhnologiya metallurgicheskogo proizvodstva. 2016. No. 2. pp. 42–43.
11. Vdovin К. N., Foktistov N. А., Аbenov М. B. et. al. The quality of grinding balls produced by diff erent methods. Teoriya i tekhnologiya metallurgicheskogo proizvodstva. 2015. No. 1(16). pp. 78–81.
12. Vavilkin N. М., Chelnokov V. V. To the selection of the material for production of grinding balls. Izvestiya vysshikh uchebnykh zavedeny. Chernaya metallurgiya. 2002. No. 1. pp. 41–46.
13. Nayzabekov А. B., Mukhametkaliev B. S., Arbuz А. S., Lezhnev S. N. Reduction of consumption of grinding balls by improving the technology of their production. Vesti vysshykh uchebnykh zavedeny Chernozemya. 2016. No. 4(46). pp. 78–86.
14. Dyubin N. P., Zanies А. N., Tsilevich I. Z. Et. al. Production of milling balls at the Azovstal plant. Metallurgicheskaya i gornorudnaya promyshlennost. 1962. No. 4. pp. 77–81.
15. Peretyatko V. N., Кlimov А. S., Filipova М. V. Ball rolling mill: in the book Metallurgy, technology, management, innovations, quality. Collection of scientific works of SibGIU. Novokuznetsk: 2010. pp. 255–257.

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