Metallurgy, Vol. 60 No. 3-4, 2021.
Preliminary communication
Recycling of stainless steel bar scrap by radial-shear rolling to obtain a gradient ultrafine-grained structure
S. Lezhnev
; Rudny industrial institute, Rudny, Kazakhstan
A. Naizabekov
; Rudny industrial institute, Rudny, Kazakhstan
E. Panin
; Karaganda industrial university, Temirtau, Kazakhstan
I. Volokitina
; Rudny industrial institute, Rudny, Kazakhstan
D. Kuis
; Belarusian state technological university, Minsk, Belarus
Abstract
The paper presents the results of the conducted experiments confirmed not only the possibility of processing bar scrap from stainless metals to produce a marketable product, but also confirmed the possibility of obtaining highquality bars with a gradient fine-grained structure and an increased level of mechanical properties. In the course of the research conducted on deformed bar scrap in the form of pins from 12X18N9T austenitic stainless steel at the radial-shear rolling mill the microstructure of two different types was obtained: on the periphery - equiaxed ultrafine- grained structure with a grain size of 0,4 – 0,6 μm; in the axial zone - oriented striped texture. This discrepancy in the structure of the peripheral and axial zones, together with the results of microhardness measuring across the cross section of samples with a total degree of deformation of 44,4 %, indicates the gradient nature of the formed microstructure.
Keywords
stainless steel; recycling; radial-shear rolling; microstructure; mechanical properties
Hrčak ID:
256103
URI
Publication date:
1.7.2021.
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