Research of surface quality of structural components made using additive technology of electric arc welding

Abstract

A brief analysis of the existing methods of additive technologies with reference to the aviation industry is carried out. The prospects of this direction are shown taking into account the possibility of production of aircraft parts on the principle of “bottom-up”. The results of researches of additive technology of electric arc surfacing in carbon dioxide of complex parts are presented. In the course of the carried out studies technological peculiarities of the technology connected with the parameters of welding arc, melting of cladding wire have been found out. Arc current has the greatest influence on the appearance of the molding. The wire feed rate affects the height of the welded roll. It is shown that the stability of the welded rolls formation depends on the modes of metal transfer, which depend on the conditions of wire feeding and insertion into the melt bath.

Study of mechanical properties of C-Mn-Si composition metal after wire-arc additive manufacturing (WAAM)

“…Both laser and electron beam technologies are widely used in various industries for manufacture of functional and structural components with complicated structural shape [3][4][5]. Wire-arc additive manufacture (WAAM) uses electric arc as heat source and solid wire as initial material [11,12]. WAAM is the method of additive manufacture, which uses arc welding for metal wire melting.…”

“…Wire is applying by layers with assistance of robotic manipulator, in correspondence with a 3D model; as a result, high-precision billet for consequent processing in CNC machine tool is obtained. Manufacture of defect-free billets with excellent physical, mechanical and metallurgical properties is one of the tasks of additive manufacturing (AM) of metal materials [11,12]. Most of modern commercial metal materials which are used for AM are steels [4-7, 10, 11], as well as aluminium and titanium alloys [13][14][15][16][17][18].…”