Abstract
The review of cold rolling mills used for the production of tinplate and thin tinplate in the world is presented. World tinplate production is characterized by the desire to reduce the thickness of its steel base. In connection with the variety of tinplate rolling mills, peculiarities of the deformation conditions of thin tinplate, complexity of the technological process and theoretical prediction of the rolling process indices, especially in terms of the theoretical model universality, as well as paucity of existing practical data, the necessity of experimental research is substantiated. Experimental research methodology of energy and force modes for tinplate and thin tinplate rolling for different cold rolling mills: five-, six- and seven-stand, was developed. Deformation modes have been developed that allow simulating the process of continuous cold rolling of tinplate with a thickness of 0.16 mm and 0.28 mm in five-, six- and sevenstand mills, respectively. The technical characteristics of industriallaboratory equipment involved in experimental research are presented. The results of the chemical composition and mechanical properties investigation of the initial blank are presented. Experimental research of energy and force modes for tinplate rolling at different parameters of cold rolling mills using the developed methodology will determine their optimal combination, as well as justify the choice of rolling equipment in terms of energy efficiency of the rolling process and the quality of the strip.
Highlights
World tinplate production is characterized by the desire to reduce the thickness of its steel base [1], that along with high demands on mechanical properties, surface quality and accuracy of the geometric dimensions of the cold-rolled strip [2], presents a complex production task, associated with the observance of certified production conditions and labor safety [3]
This task was solved by double rolling on rolling mills, as well as by the increase in the number of stands of continuous mills
The peculiarity and complexity of the production technology of cold-rolled strips and tinplate are associated with intensive hardening, high rolling speed
Summary
World tinplate production is characterized by the desire to reduce the thickness of its steel base [1], that along with high demands on mechanical properties, surface quality and accuracy of the geometric dimensions of the cold-rolled strip [2], presents a complex production task, associated with the observance of certified production conditions and labor safety [3]. In Toyo (Japan), since 2000, four-stand continuous cold rolling mill combined with the etching line in an etching machine [14], with the ability to produce tinplate with the maximum thickness of 0.15 mm, has operated Getting such a small thickness of the tinplate on a four-stand mill became possible due to the use of six-high stands. PJSC "Magnitogorsk Iron and Steel Works" does not have a technical capability of producing double reduced tinplate and produces single-reduced tinplate according to GOST 13345-85 (international standard) with a minimum thickness of 0.16 mm and a maximum width of 910 mm on a continuous five-stand cold rolling mill 1200 with an annual capacity of about 435,000 tons/year. The purpose of the work is the development of the experimental research methodology for assessment of energy and force modes for tinplate rolling at different parameters of rolling equipment
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