Actual Problems in Machine Building 2016 No. 3

Актуальные проблемы в машиностроении. 2016. №3 Инновационные технологии в машиностроении ____________________________________________________________________ 41 INFLUENCE SHIELDING GAS ON THE SHAPE OF WELD BEAD IN RESTORATION OF WORN DETAILS Chinakhov D.A. 1 , Ph.D. (Engineering), Associate Professor, e-mail: chinakhov@tpu.ru Grigorieva E.G. 1 , Ph.D. student, e-mail: sedasch@mail.ru Mayorova E.I. 1, 2 , Ph.D. student, e-mail: eim@tpu.ru 1 Yurga Institute of Technology, TPU Affiliate, 26 Leningradskaya st., Yurga, 652055, Russian Federation 2 National Research Tomsk Polytechnic University, 30 Lenin Avenue, Tomsk, 634050, Russian Federation Abstract To restore worn parts and to give special properties of the surface it is desirable to have in the deposited layer composition as close as possible to the composition of the deposited (filler) metal, so it is necessary to strive for a minimum penetration of the base metal, i.e., to reduce the proportion of the base metal in the weld metal. At present, an urgent task is to develop a technology management deposited bead geometry. This paper presents methods for controlling the geometry of the weld bead during surfacing consumable electrode. The comparative evaluation of the geometrical parameters of the roller is welded for welding with traditional (single-jet) gas and two- protection. The coefficients characterizing the shape of beads confirmed the influence of the shielding gas flow rate on the formation of the deposited layer, particularly when the two- gas protection. Keywords surfacing, shielding gas, surfaced layer, gas-dynamic influence, two-jet gas shielding