Chemical Non-Uniformity of the Rolling Mill Metal Roll Made of 70kh3gnmf Steel
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Дата
2025-12
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Видавець
Хмельницький національниий університет
Анотація
The results of studies on the chemical composition of the rolling mill roll neck section, which corresponds to the upper part of the 48-ton 70Kh3GNMF steel ingot from which the roll was manufactured, are presented. It was determined that the carbon content across the entire cross-section of the roll exceeds the upper allowable limit (0.75 %) for 70Kh3GNMF steel.
The highest content of carbon (about 1 wt.%), sulfur (up to 0.053 wt.%), and phosphorus (up to 0.023 wt.%) is observed at a distance of approximately 1/3 of the radius from the roll surface. Due to the resulting decrease in metal strength, this caused the formation of defects in the form of cracks in these areas during the ingot forging. The necessity of applying external influences to reduce segregation in the steel ingot, particularly heating and metal stirring, is noted.
Опис
Ключові слова
steel ingots, chemical non-uniformity, segregation, metal defects
Бібліографічний опис
Zlyhoriev K. V., Biktahirov F. K., Shapovalov V. O., Veretilnyk O. V. Chemical Non-Uniformity of the Rolling Mill Metal Roll Made of 70kh3gnmf Steel. Proceedings of the 20th International Conference on Science and Education, January 4 – 13, 2026, Hajduszoboszlo (Hungary). Khmnu, 2025. P. 117-121