Actual Problems in Machine Building 2017 Vol. 4 No. 3

Актуальные проблемы в машиностроении . Том 4. № 3. 2017 Материаловедение в машиностроении ____________________________________________________________________ 99 RESEARCH OF INFLUENCE OF REPAIR BY WELDING ON QUALITY OF OPERATION OF A CAST PARTS FROM 20GL STEEL Kveglis L.I. , D.Sc. (Physics and Mathematics), Professor, e-mail: kveglis@list.ru, kveglis@iph.krasn.ru Karavaiceva A.A. Ph.D. student, e-mail: anastasiya-romanova-16.09@mail.ru Siberian Federal University, 79 Avenue Free, Krasnoyarsk, 660041, Russian Federation Abstract To improve the efficiency of the process of transportation and to achieve the proper level of security is required to ensure the appropriate quality of the rolling stock parts. One of the factors directly affecting the traffic safety on the railways are fracture side frames of freight wagons as a result of the emergence and development of fatigue cracks. The main type of crack repair is the process of peeling-off, cutting, and welding. The present study addressed issues related to the welding defects in cast parts trolley cars. Defects are considered typical between base metal and weld metal formed during welding. Keywords welding defects, microstructure, steel 20GL, microtension, mechanical properties, structural imperfections