SEM, 2020, #2, 3-9 pages
Investigation of the technological features and admissible pressures of the process of vacuum ESR
I.V. Protokovilov, D.A. Petrov, V.B. Porokhonko
E.O. Paton Electric Welding Institute of the NAS of Ukraine.
11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: firstname.lastname@example.org
The paper presents the results of experimental studies of the features of vacuum electroslag remelting process at remelting
of steel and titanium consumable electrodes in a chamber-type electroslag furnace, using fluoride-oxide and
salt fluxes. It was found that pressure lowering in the furnace melting space results in decrease of melting current,
increase of its oscillation amplitude and subsequent violation of the stability of the electroslag process, caused by slag
pool boiling. It was determined that the critical pressure level, at which pool boiling occurs, depends on flux composition
and electric modes, determining the power of the ESR process. For salt fluxes of AN-T1 and AN-T4 type, the
critical pressure level is equal to approximately 12...22 and 15...26 kPa, respectively, and for ANF-1, ANF-6, ANF-28
fluoride-oxide fluxes it is 3...15 kPa. It is shown that the higher is the remelting power, the higher the pressure, at which
flux boiling occurs. Ref. 12, Tabl. 1, Fig. 5.
electroslag remelting; chamber furnace; vacuum; flux; boiling; melting current; voltage
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