DEVELOPMENT AND JUSTIFICATION OF THE TECHNOLOGY OF CONTINUOUS CASTING-ROLLING OVER A THIN ALUMINUM SHEET

Abstract

The article discloses the principles of implementing the technology of continuous casting and rolling of ultra-thin
aluminum sheet. The mechanisms of implementation of the technology of continuous casting and rolling are described and
the advantages of such a process are substantiated. It is noted that one of the promising options for creating combined
processes of continuous casting and rolling is the use of fundamentally new machines for continuous casting of blanks as
part of the casting and rolling complex, which allow obtaining blanks produced using continuous technology, close in shape
and size to finished rolled products. The main components of continuous casting-rolling technology are described, which are
the processes of solidification of the melt and hot rolling between rolls during continuous casting and rolling. The scheme of
the main line of implementation of the technology of continuous casting and rolling of ultra-thin aluminum sheet and the
general scheme of the implementation of the technology of continuous casting and rolling are visually presented. It is
emphasized that changing the parameters of the technology implementation process, such as the speed of stripping, the
temperature of pouring molten aluminum, the length of the casting and rolling zone and the preheating temperature directly
affects the distribution of the three phases in the casting and rolling zone. The principles of implementing heat exchange,
which occurs in three ways: heat conduction, convection, and radiation, are described. In this study, the thickness of the
aluminum output is 0.3 mm, and the blanking speed, casting temperature, pouring and rolling zone length are taken as
variables to substantiate the effectiveness of the proposed technology of continuous casting and rolling of ultra-thin
aluminum sheet. The technology of continuous casting-rolling of ultra-thin aluminum sheet is substantiated and it is
determined that to obtain ultra-thin aluminum sheet, the ratio of the depth of the liquid cavity to the entire pouring-rolling
interval is less than 50%, the speed of movement of the workpiece is 0.4-0.6 m min., the length of the foundry -rolled zone 55-
95 mm and pouring temperature 933-993 K. Taking into account that the pouring temperature has little effect on
solidification, and the corresponding cavity depth coefficient for the liquid is about 50%, the choice of the pouring
temperature range can be softene