Open AccessFormation of the Structure and Decarburized Layer During Hot Screw Rolling of Vessels
Author(s) -
Р. Л. Шаталов,
В. А. Медведев
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/718/1/012016
Subject(s) - materials science , metallurgy , ferrite (magnet) , layer (electronics) , hot rolled , surface layer , composite material
We studied the influence of temperature and soaking time on rod billets made of steel 50. The development of the decarburized layer after induction heating and soaking in the resistance furnace was taken into account. When analyzing cooled down rod billets subjected to heat treatment, a continuous and stable development of a ferritic layer on the entire surface of rod billets was detected. Rod billets heated in a similar way as those on which the size of the outer decarburized layer had been defined were hot rolled. Experimental rolling was performed in a 3-high stand of the rolling-press line of JSC Scientific Production Association (SPA) “Pribor”. After cooling it was found that the sizes of a ferrite ring on the outer surface of steel vessels had changed. The analysis of the obtained data allowed us to find a relationship between the change in the structure of a ferrite ring formation and a draw ratio λ. A regression equation was obtained for determining the influence of drawing during screw rolling on the size of a decarburized layer.