Recycling of stainless steel bar scrap by radial-shear rolling to obtain an ultrafine-grained gradient structure

• Published in: Litʹë i metallurgiâ no. 2; pp. 61 - 67
• Main Authors: Lezhnev, S. N., Naizabekov, A. B., Volokitina, I. E., Panin, E. A., Kuis, D. V.
• Format: Journal Article
• Language: English
• Published: Belarusian National Technical University 09.07.2021
• Subjects: austenitic stainless steel; bar scrap; gradient structure; radial-shear rolling; recycling; ultrafine-grained structure
• ISSN: 1683-6065; 2414-0406
• DOI: 10.21122/1683-6065-2021-2-61-67

This work is devoted to the study of the possibility of recycling bar scrap of stainless metals using radial-shear rolling. In the course of studies on the deformation of bar scrap in the form of pins made of 12X18N9T stainless austenitic steel on a radial-shear rolling mill, the resulting bar was obtained microstructure of two different types: on the periphery an equiaxed ultrafine-grained structure with a grain size of 0.4–0.6 microns was formed; in the axial zone anoriented, banded texture was obtained. This discrepancy in the structure of the peripheral and axial zones, together with the results of cross-section microhardness measurements of samples made of 12X18N9T austenitic stainless steel with a total degree of deformation of 44.4 %, indicates the gradient nature of the resulting microstructure.