Obrabotka Metallov 2013 No. 3

ОБРАБОТКА МЕТАЛЛОВ № 3 (60) 2013 24 ТЕХНОЛОГИЯ 2 Larionov Institute of the Physical-Technical Problems of the North of the Siberian Branch of the RAS, Oktyabrskaya st., 1, Yakutsk, 677891, Russia E-mail: litsin@ispms.tsc.ru, n.i.golikov@mail.ru Abstract The influence of modes of adaptive pulse-arc welding on mechanical properties and distribution of residual stress of welded connections of plates from the low-alloyed steel grade 09Г2С is investigated in this paper. The optimum modes of welding for this steel are defined. By X-ray method it is established that at the adaptive pulse-arc mode of welding more favorable distribution of residual welding tension in welded connections is formed. The level of the stretching tension in such welded connections doesn’t exceed 50 MPa. After the pulse mode of welding the impact strength of seam metal is increased by 1.85 times during descent of the samples’ tests temperature to – 60 °C in comparison with a seam received on a stationary mode. Keywords: welding, pulsed, low-alloy steel, mechanical properties, impact strength, residual welding stresses References 1. Saraev Yu.H. Tyazheloe mashinostroenie , 2010, no. 8, pp. 14-19. 2. Saraev Yu.N., Bezborodov V.P. Tyazheloe mashinostroenie , 2010, no. 11, pp. 30-32. 3. Saraev Yu. N., Bezborodov V. P., Poletika I. M., Tjutev A. V., Nikonova I. V., Kirilova N. V. and Sevast’janov S. P. Uluchshenie struktury i svojstv svarnyh soedinenij nefte-, gazoprovodnyh trub bol’shogo dimetra [Improvement of the structure and properties of welded joints in large-diameter oil and gas pipes]. Avtomaticheskaja svarka - Paton Welding Journal , 2004, no.12, pp. 34-38. 4. Saraev Yu.N., Bezborodov V.P., Tjutev A.V., Nikonova I.V. Obrabotka metallov (tehnologija, oborudovanie, instrumenty) , 2005, no. 1, pp. 25-26. 5. Yakovleva S.P., Makharova S.N., Sleptsov O.I, Borisova M.Z. Physical and mechanical properties of low-alloyed steel with nanosized structure elements. Rare Metals, 2009, Vol. 28, Spec. Issue, pp. 906 – 908. 6. Saraev Yu.N., Makarova L.I., Kirilova N.V., Nikolaev A.S., Kozlov A.V., Khomchenko E.G. Vlijanie lokalizacii plasticheskoj deformacii na kinetiku razrushenija obrazcov svarnyh soedinenij [Effect of localisation of plastic deformation on the kinetics of failure of specimens of welded joints]. Svarochnoe proizvodstvo - Welding International , 2000, no. 6, pp. 20-24. 7. Saraev Yu.N., Poletika I.M. Kozlov A.V., Homchenko E.G. Formirovanie struktury i svojstv svarnyh soedinenij v uslovijah reguliruemogo teplovlozhenija pri impul’sno-dugovoj svarke [Formation of structure and properties of welds in the conditions of heat input during pulse welding]. Fizicheskaja mezomehanika - Physical Mesomechanics , 2005, Vol.8, Spec. Issue, pp.137-140. 8. Dmitriev A.I., Psakhie S.G. Multi-scale study of low-density layer formation and lifting force effects under contact impact. Frontiers of Eng. Mech. Res, 2012, Vol.1, Iss.1, pp. 17-22. 9. Saraev Yu.N., Poletika I.M. Kozlov A.V., Kirilova N.V., Nikonova I.V., Perovskaja M.V., Ekimov V.S., Sal’ko A.E. Formirovanie struktury i svojstv svarnyh soedinenij pri adaptivnoj impul’sno-dugovoj svarke pokrytymi jelektrodami otvetstvennyh konstrukcij, rabotajushhih v uslovijah nizkochastotnogo termociklirovanija [Formation of the structure and properties of welded joints in adaptive pulsed-arc coated electrode welding of important structures working on the conditions of low frequency thermal cycling]. Svarochnoe proizvodstvo - Welding International , 2004, no. 1, pp. 22-27. 10. Saraev Yu. N., Bezborodov V.P. Vlijanie jenergeticheskih parametrov processov svarki na strukturu i svojstva zon svarnyh soedinenij nizkolegirovannyh stalej [Effect of the energy parameters of the welding process on the structure and properties of welded joints in low-alloy steels]. Svarochnoe proizvodstvo - Welding International , 2012, no. 8, pp. 3-5.