Abstract
Nowadays, we see a rapid pace of a non-ferrous metallurgy development in Russia - many industries, including the automotive industry, are using energy-efficient aluminum and its alloys as raw materials for metal structures more often. In this regard, the development of methods and technologies for processing aluminum materials in order to obtain improved properties becomes a topical aim. Increasing hardness, for example, will reduce the likelihood of slight damage in minor car accidents. This paper shows the possibility of controlling hardness values using the asymmetric rolling process. The process of rolling of aluminum alloys AD33, D16 and AMg6 was studied. The main characteristics of the asymmetric deformation process, variable and controlled parameters are presented. Rolling was carried out on the asymmetric rolling mill 400 of the Zhilyaev Laboratory of Mechanics of Gradient Nanomaterials in NMSTU. Based on the results of the experiment, the main parameters of aluminum alloys production are presented, including the final and initial thicknesses of the samples, the values of relative reductions, rolling forces, the rolls speeds ratio and hardness obtained by the measurement with the use of the Brinell method. A comparative analysis of the results obtained during symmetric and asymmetric rolling is presented. The main dependences of the hardness of aluminum strips made of the AD33, D16 and AMg6 alloys on changes in relative compression are shown.
Keywords:
asymmetric rolling, aluminum alloys, hardness, automotive industry, rolls speed ratio.