Avtomaticheskaya Svarka (Automatic Welding), # 7, 2018, pp. 37-40
Calculation of penetration zone dimensions in surfacing
of rolls of machines for continuous casting of billets
V.N. Matvienko, L.K. Leshchinsky, V.A. Mazur
State Higher Eductation Instittue Pryazovskyi State Technical University 7 Universitetskaya Str., 87500, Mariupil, Ukraine.
It is shown that in surfacing of rolls in machines for continuous casting of billets (MCCB) the dimensions of penetration zone are affected by chemical composition and thermal physical properties of the material of roller or deposited sublayer. The calculated values of cross-sectional area, penetration depth and volume of the molten metal are presented obtained by numerical modeling on the basis of the solution of the nonlinear three-dimensional differential equation of thermal conductivity, taking into account the approximated temperature dependence of thermal conductivity coefficient. It was established by calculation and confirmed by experiment that the dimensions of penetration zone increase in surfacing by strip electrode under flux on a sublayer of martensitic-ferrite high-chromium steel and in a higher extent on a sublayer of austenitic chromium-nickel steel as compared to surfacing on the material, or on a sublayer of low-carbon low-alloyed steel. 10 Ref., 3 Tab., 3 Fig.
roll of machine for continuous casting of billets, base metal, submerged surfacing, strip electrode, penetration zone, dimensions, numerical simulation, deposited layer, sublayer, chemical composition, thermophysical characteristics, thermal conductivity coefficient
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