Журналы →  Chernye Metally →  2023 →  №9 →  Назад

Rolling and Heat treatment
Название Investigation of the influence of hardening medium parameters during heat treatment of grinding balls from rail steel on the quality of their microstructure and hardness
DOI 10.17580/chm.2023.09.09
Автор A. A. Umansky, A. S. Simachev, L. V. Dumova, S. O. Safonov
Информация об авторе

Siberian State Industrial University, Novokuznetsk, Russia:

A. A. Umansky, Dr. Eng., Associate prof., Director of the Institute of Metallurgy and Materials Science, e-mail: umanskii@bk.ru
A. S. Simachev, Cand. Eng., Director of the Center for Collective Use “Materials Science”, e-mail: simachev_as@mail.ru
L. V. Dumova, Leading Engineer, Center for Collective Use "Materials Science", e-mail: doumova@bk.ru
S. O. Safonov, Postgraduate Student


In order to develop optimal modes of heat treatment of grinding balls made of K76F grade rail steel, a series of laboratory experimental studies were carried out, in which the cooling capacity of the polymer water-soluble quenching medium PCM was studied with varying its concentration and temperature, and the microstructures of grinding balls heat-treated using the specified quenching medium were analyzed. Studies of the cooling capacity of the polymer quenching medium PCM have shown that at a concentration of the specified polymer in an aqueous solution at a level of 2 % to 4 %, the cooling rate of K76F steel at temperatures of the quenching medium in the range of 20-30 °C practically does not differ and decreases when the temperature reaches 40 °C. On the basis of metallographic studies, the features of the microstructure of grinding balls made of K76F steel after heat treatment carried out using a polymer quenching medium PCM at its various concentrations and tem eratures were
determined. As a result, it was found that varying the parameters of the specified quenching medium makes it possible to obtain balls with a different set of properties. In particular, the use of a 2 % polymer solution PCM with a temperature in the range of 20–30 °C as a quenching medium ensures the production of balls of high hardness (IV hardness group according to GOST 7524–2015), and the use of a 4 % solution of PCM with a temperature of 20–30 °C leads to the production of balls of lower hardness (I and II hardness groups according to GOST 7524–2015), but with increased impact resistance.
The study was supported by the grant of the Russian Science Foundation No. 22-29-20170, grant of the Kemerovo region – Kuzbass.

Ключевые слова Quenching medium, grinding balls, rail steels, hardening, microstructucture, hardness
Библиографический список

1. Krutilin A. N., Bestuzhev N. I., Bestuzhev A. N., Kalenkovich D. N. Grinding bodies. Problems. Prospects. Lityo i metallurgiya. 2009. No. 4 (53). pp. 26–33.
2. Rakhutin M. G., Boyko P. F. Ways to improve methods for assessing the main characteristics of grinding balls. Ugol. 2017. No. 12. pp. 49–51.
3. Lam M. M., Serov A. I., Smirnov E. N., Ternavsky A. A., Bazarova G. S. Industrial testing of grinding balls of the IV hardness group produced by PJSC Donetsk Metal Rolling Plant. Metallurg. 2016. No. 9. pp. 63–67.
4. Smirnov E. N., Smirnov A. N., Mikheev V. V., Sklyar V. A. et al. Evaluation of the applicability of continuously cast steel grade 55 in the production of grinding balls with a diameter of 40 mm, IV and V hardness groups. Stal. 2020. No. 4. pp. 44–49.
5. Stalinskiy D. V., Rudyuk A. S., Solenyi V. K. Mastering the production and evaluating the efficiency of using high-quality grinding balls. Message 1. Mastering the production of balls from chromium-molybdenum steel. Stal. 2021. No. 11. pp. 36–39.
6. Nayzabekov A. B., Mukhametkaliev B. S., Arbuz A. S., Lezhnev S. N. Reduction of consumption of steel grinding balls by improving their production technology. Vesti vysshikh uchebnykh zavedeniy Chernozemya. 2016. No. 4 (46). pp. 78–86.
7. Umanskiy A. A., Simachev A. S., Dumova L. V. Development of technology for production of grinding bodies with improved performance properties from the rail steels rejection. Chernye Metally. 2021. No. 5. pp. 57–62.
8. Baranov N. A., Tulupov O. N. Production of grinding balls from rail steel. Aktualnye problemy sovremennoy nauki, tekhniki i obrazovaniya. 2017. Vol. 1. pp. 96–99.
9. Pater Z., Tomczak J., Bulzak T., Andrietti S., Barbelet M. An innovative method for producing balls from scrap rail heads. International Journal of Advanced Manufacturing Technology. 2018. Vol. 97, Iss. 1–4. pp. 893–901.
10. Tomczak J., Pater Z., Bulzak T. The flat wedge rolling mill for forming balls from heads of scrap railway rails. Archives of Metallurgy and Materials. 2018. Vol. 63, Iss. 1. pp. 5–12.
11. Pater Z., Tomczak J., Bulzak T. A cross wedge rolling process for forming 70 mm diameter balls from heads of scrap railway rails. Procedia Manufacturing 27th International Conference on Flexible Automation and Intelligent Manufacturing, Faim 2017. 2017. Vol. 11. pp. 466–473.
12. Camurri C., Carrasco C., Colàs R. Improving the working life of steel grinding balls by optimizing their hardness and tenacity. Materials Science Forum. 2014. Vol. 783. pp. 2260–2265.
13. Stalinskiy D. V., Rudyuk A. S., Solenyi V. K. Evaluation of the influence of grinding balls hardness on the wear and efficiency of grinding ferruginous quartzites. Ekologiya i promyshlennost. 2019. No. 1 (58). pp. 69–76.
14. Bai X., Jin Y. Heat treatment of wear resistant steel ball for large ball mill. Heat Treatment of Metals. 2017. Vol. 42, Iss. 5. pp. 193–196.
15. Stalinskiy D. V., Rudyuk A. S., Solenyi V. K. Choice of material and technologies for heat treatment of grinding balls operating mainly under abrasive wear conditions. Stal. 2017. No. 6. pp. 64–69.
16. Shevchenko O. I., Trekin G. E., Rubtsov V. Yu., Kurochkin V. V. Heat treatment of grinding balls in a new ball rolling mill. Vestnik Permskogo natsionalnogo issledovatelskogo politekhnicheskogo universiteta. Mashinostroenie, materialovedenie. 2019. Vol. 21. No. 3. pp. 110–117.
17. Efremenko V. G., Popov E. S., Kuzmin S. O., Rufanova O. I., Efremenko A. V. Implementation of the technology of three-stage thermal hardening of large-diameter grinding balls. Metallurg. 2013. No. 9. pp. 88–92.
18. Efremenko V. G. Metallographic analysis of causes of destruction of rolled steel bodies for drum mills. Vestnik Priazovskogo gosudarstvennogo tekhnicheskogo universiteta. 2000. No. 9. pp. 89–91.
19. Arlazarov A., Bouaziz O., Masse J. P., Kegel F. Characterization and modeling of mechanical behavior of quenching and partitioning steels. Materials Science and Engineering: A. 2015. Vol. 620. pp. 293–300.
20. Aysat S., Sadaddin A., Braday M. A., Yunus R. et al. Effect of heat treatment on hardness and wear of grinding balls. Metallovedenie i termicheskaya obrabotka metallov. 2017. No. 5 (743). pp. 34–38.
21. GOST 51685–2013. Railway rails. General specifications. Introduecd: 01.07.2014.
22. GOST 7524–2015. Grinding steel balls for ball mills. Introduecd: 01.11.2016.

Language of full-text русский
Полный текст статьи Получить