3D modelling of the large-capacity ingots of an Al – Mg system aluminium alloy doped with scandium rolling process

Константинов

et al. 2019

MSF

Results of researches of process of hot rolling of ingots from the experimental aluminum alloy which is economically alloyed by scandium are given. The computer model of process of hot rolling with the use of which the straining, temperature and speed processing modes conditions is calculated and also power parameters of processing is calculated in applied to industrial conditions. It is shown that the use in the model of a certain shape of the ingot faces (Petrov's lock) and indirect rolling action in the edging stand is made it possible to reduce the likelihood of the formation and further development of micro cracks on the edges of rolled metal. The adequacy of results of modeling was confirmed by carrying out pilot-industrial tests when rolling large-size ingots from the experimental alloy and obtaining batches of hot-rolled plates and sheets of various sizes. The tensile test was used to study deformed samples after rolling and samples obtained on five regimes of heat treatment with varying heating temperatures of 300, 350 and 380 oС and holding time in the furnace for 1 and 3 hours. The results of the studies on samples of hot-rolled sheets 10 mm thick showed that, compared with the initial state, the strength characteristics of the metal after heat treatment are reduced by an average of 12-20%, and plastic characteristics increase by 50-65%. In this case, the heat treatment regimes 1 - 3 give a good ratio of the ductility and plastic properties of the metal.

Section: Results and Its Discussionmentioning

confidence: 99%

Modeling and Investigation of the Process of Hot Rolling of Large-Sized Ingots from Aluminum Alloy of the Al-Mg System, Economically Alloyed by Scandium

Mann

Константинов

et al. 2019

MSF

“…Engineering products, especially aircraft and shipbuilding, widely use structural products made by machining aluminum alloy plates obtained by hot and cold sheet rolling [1][2][3][4][5][6]. One of the important tasks is to develop rolling modes that exclude the formation of various defects that arise due to the temperature heating of the metal during its deformation and the action of tensile stresses in the surface and intermediate zones along the thickness of the rolled product.…”

Section: Introductionmentioning

confidence: 99%

Simulation of Process Rolling Plates from Alloy of Al-Mg System Economically Doped with Scandium

Dovzhenko

Belokonova

2021

SSP

The modes of hot and cold rolling of plates from an alloy of the Al-Mg system alloy, doped with scandium in the range of 0.10-0.12%, are modeled. At the first stage of work, using the DEFORM-3D software package, we simulated the process of hot sheet rolling at the Quarto 2800 mill, in order to obtain a billet for further cold rolling. Analysis of the simulation data showed that with the adopted compression mode, the metal forming and temperature conditions of rolling make it possible to obtain plates up to 45 mm thick, without defects, with rational power loading of the equipment. Further modeling of the regime of cold rolling of plates with a thickness of up to 31.5 mm showed that cold rolling can be carried out in 4 passes, provided that the stress and rolling force do not exceed the permissible values. At the second stage of work, we conducted an experimental verification of the obtained simulation results both in industrial and in laboratory conditions. It was found that the value of the total compression leading to the destruction of the samples, depending on the rolling conditions, should not exceed 21-30%. At this degree of deformation, the rolled metal from the alloy under study has high strength and plastic properties. Subsequent industrial verification of the research results confirmed that this alloy is quite advanced technologically, while it has high deformability, both during hot and cold rolling, which allows us to recommend it for sheet deformed semi-finished products in the manufacture of structural products for various purposes.

“…An example of such alloys are Russian aluminum alloys 1570 and 1580, in which the content of scandium is, respectively, 0.17-0.27, and 0.05-0.14% (wt.). The technology for producing flat products from these alloys is described in [32][33][34][35][36][37][38][39][40]. However, with the positive effect of scandium on increasing strength, the high cost of this metal limits the widespread use of these alloys.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the structure and properties of cold-rolled strips from experimental alloy 1580 with a reduced scandium content

Константинов

Баранов

Int J Adv Manuf Technol

et al. 2020

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