Analysis of the influence of the chemical composition and metallurgical quality of grinding balls on their operational properties-Reference-Cited by-同舟云学术

Analysis of the influence of the chemical composition and metallurgical quality of grinding balls on their operational properties

Published:2023-07-31 Issue:6 Volume:79 Page:484-495
ISSN:2619-0753
Container-title:Ferrous Metallurgy. Bulletin of Scientific , Technical and Economic Information
language:
Short-container-title:Černaâ metallurgiâ. Bûlletenʹ naučno-tehničeskoj informacii

Author:

Umanskii A. A.¹,Morozov I. S.¹,Protopopov E. V.¹,Safonov S. O.¹

Affiliation:

1. Siberian State Industrial University

Abstract

On the basis of a complex of researches carried out in laboratory and industrial conditions using standard methods of metallographic analysis and impact testing of balls, the regularities of the formation of the quality of the macro- and microstructure of grinding balls in relation to their operational resistance in the production of rail steels and specialized ball steels of various chemical compositions are determined. When studying samples of five different compositions, it was determined that grinding balls made of 76XF steel have an optimal homogeneous microstructure that provides high impact resistance in combination with increased hardness after heat treatment. Additional alloying of the specified rail steel with chromium and nickel in excess of the requirements of regulatory documentation leads to the formation of dendritic liquation in the cast structure, which decreases, but is not completely eliminated after heat treatment of the produced balls. This microstructure is defective and causes a reduced impact resistance of grinding balls. In the production of balls made of 90HAF grade hypereutectoid rail steel, cementite is present in the microstructure, which reduces the balls' resistance to shock loads; at the same time, there is no noticeable increase in the hardness of heat-treated balls compared to balls made of 76XF steel. With regard to balls made of specialized steels of grades Sh2.1 and Sh2.3, the determining effect on their impact resistance of macrostructure defects passing from the initial cast blanks has been established. The features of the quenching microstruc-ture of grinding balls made of specialized steels of the specified grades, formed by varying the modes of their heat treatment, does not significantly affect the impact resistance of the balls

Funder

Russian Humanitarian Foundation

Publisher

South Ural State University

Subject

General Medicine

Reference20 articles.

1. Artes A. E., Tret’yukhin V. V. The problem of improving the production of grinding balls. Quality and innovation. Kompetentnost’, 2014, no. 3 (114), pp. 50‒53. (In Russ.).

2. Sun Chzhaoyan, Pu Isun, Lyu Chzhisin’, Van Baotsi. Analysis of the causes of cracking of grinding balls during operation. Metallovedenie i termicheskaya obrabotka metallov, 2022, no. 2 (800), pp. 59‒65. (In Russ.).

3. Duisemaliev U. K., Duisemaliev T. U., Shcheneva A. V. etc. Production of grinding balls from alloyed cast iron. Liteinoe proizvodstvo, 2006, no. 11, pp. 11, 12. (In Russ.).

4. Poddubnyi A. N., Kul’bovskii I. K., Dyukov A. V. Grinding balls with high operational resistance made of white alloyed cast iron. Liteinoe proizvodstvo, 1997, no. 5, pp. 46, 47. (In Russ.).

5. Krutilin A. N., Bestuzhev N. I., Bestuzhev A. N., Kalenkovich D. N. Grinding bodies. Problems. Prospects. Lit’e i metallurgiya, 2009, no. 4 (53), pp. 26‒33. (In Russ.).