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On rough set theory on achieving high quality cable material production by green low carbon technology

Shuai Guoliang, Li Zhen, Zhang Diantao, Elhefnawey Maged, Li Li

Ecological Chemistry and Engineering. S

2021

Vol. 28, nr 1

49--59

As the second largest machinery industry, the energy-intensive cable industry not only creates a lot of economic value but also consumes a lot of energy. It is an inevitable requirement to promote the technological development of the industry in the new era to improve the quality and efficiency and realise industrial energy-saving and consumption reduction. In order to obtain good strength and conductivity, the metal rods of cable are usually heat-treated for several hours or even several days after the rods are extruded, this is a major energy consuming process in traditional production. Based on the background, this study adopted the energy-saving equal-channel angular pressing (ECAP) technology to replace the traditional heating treatment process, and converted the simple heat conduction with thermo-mechanical energy transfer, so as to realise the good strength and conductivity matching of the cable aluminum alloy material. In this study, energy-saving ECAP technology is used to replace the traditional heat treatment process, and heat-mechanical energy transfer is used to replace the simple heat conduction, so as to achieve good strength and conductivity matching of cable aluminium alloy material. The results show that the suitable ECAP process routes can improve the microstructure of aluminum alloy with higher strength and conductivity than the traditional heating process. The research results can be used for technology upgrading and low carbon production in cable industry due to the significantly time reduction of the energy-consuming heat treatment and the high-efficient obtainment of high-quality production.

Simulation and practical verification of ECAP of magnesium alloy AZ91

Kocich R., Greger M., Macháčková A.

Journal of Achievements in Materials and Manufacturing Engineering

2006

Vol. 18, nr 1-2

295--298

Purpose: Equal channel angular pressing (ECAP) technique, which involves a simple large shear deformation during passage through two intersecting channels, was applied to the AZ91 Mg alloy to obtain an ultrafine- grained microstructure. Design/methodology/approach: For the stress and strain intensity investigation, there was used computer simulation. Findings: ECAP temperature was controlled to decrease with pass number for obtaining finer grains. Four pressings were conducted at 250°C, while the fifth pressing was conducted at 180°C. The degree of grain refinement and homogeneity of grain-size distribution increased with pass number. Practical implications: FEM simulation was examined on AZ 91 alloy by practical tests. Head reason for make this simulations is the possibility of exersise in praxe. Originality/value: The experimental result agreed well with that obtained from numerical analyses carried out based on the finite element method (FEM). This results can be used in next development of SPD methods.