Metalurgija, Vol. 55 No. 2, 2016.
Izvorni znanstveni članak
Tailoring the gradient ultrafine-grained structure in low-carbon steel during drawing with shear
G. I. Raab
; Ufa State Aviation Technical University, Ufa
L. A. Simonova
; Kazan Federal University, Kazan, Russia
G. N. Alyoshin
; Ufa State Aviation Technical University, Ufa
Sažetak
Conventional drawing and drawing with shear were conducted on the rods of low-carbon steel. Deformation by simple drawing forms basically a homogenous structure and leads to a uniform change in microhardness along the billet volume. A comparative analysis of the models of these processes showed that shear drawing of steel at room temperature reduces energy characteristics in half, normal forces on the die – by 1,8, and enhances the strain intensity from 0,5 to 1,6. During drawing with shear, strain-induced cementite dissolution occurs and a gradient structure is formed, which increases the microhardness of the surface layer up to values close to 7 000 MPa.
Ključne riječi
low-carbon steel; drawing with shear; gradient structure; severe plastic deformation
Hrčak ID:
146490
URI
Datum izdavanja:
1.4.2016.
Posjeta: 1.585 *