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Актуальные проблемы в машиностроении. 2016. №3
Инновационные технологии
в машиностроении
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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.ruGrigorieva E.G.
1
, Ph.D. student, e-mail:
sedasch@mail.ruMayorova E.I.
1, 2
,
Ph.D. student, e-mail:
eim@tpu.ru1
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