Gul Yu.
Cand.-Eng. Sc., Professor, Heat Treatment of Metals Department, National
Metallurgical Academy of Ukraine, Dnipro, Ukraine
Ivchenko A.
Cand.-Eng. Sc., Senior Research Associate, Heat Treatment of Metals
Department, National Metallurgical Academy of Ukraine, Dnipro, Ukraine
Perchun G.
Cand.-Eng. Sc., Associate Professor, Heat Treatment of Metals Department,
National Metallurgical Academy of Ukraine, Dnipro, Ukraine
Chmeleva V.
Cand.-Eng. Sc., Associate Professor, Heat Treatment of Metals Department,
National Metallurgical Academy of Ukraine, Dnipro, Ukraine
Kondratenko P.
Assistant, Heat Treatment of Metals Department, National Metallurgical
Academy of Ukraine, Dnipro, Ukraine
BASIC PRINCIPLES OF THE NEW TECHNOLOGY PROJECT
OF MANUFACTURING STEEL PRODUCTS HARDENED
BY THE COLD DEFORMATION
Introduction. The technologies for manufacturing the hardened steel products
with various methods of hardening have an extensive list of literature. At the same
time, much less attention is paid to the technologies for manufacturing steel products
hardened by the cold deformation. It is usual practice to consider the hardened cold-
worked products as unreliable. A fresh monograph published in 2018 is an illustrative
example here [1]. From nearly 1000 pages of the monograph only 1.5 pages are devoted
to the principle of the steel hardening method by cold deformation, and approximately
10-15 pages are given to listing the disadvantages of this method of hardening and
unreliability of the manufactured products as unacceptably brittle and subjected to
"degradation" of the structural state due to the deformation aging.
The work objective. To substantiate the possibility of forming a new structural
state of the steel products hardened by the cold deformation applying new principles
of interaction of the crystal structure defects in the process of the cold plastic
deformation on the basis of analytical and experimental studies. In this case, the
complex of properties of such products is characterized by a combination of a given
level of hardening with the necessary levels of resistance to brittle, ductile and fatigue
failures, and the deformation aging of these cold-worked products does not lead to an
unacceptable deterioration of their properties listed above.
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