TECHNOLOGY OF CONSTRUCTION PROCEDURES. MECHANISMS AND EQUIPMENT

IMPROVEMENT OF WELDED CONNECTIONS WITH SIDE LAP WELDS BY REDISTRIBUTION OF ALL-WELD METAL ALONG LENGTHS AND CROSS-SECTIONS THEREOF USING MECHANIZED AND ROBOTIC WELDING SYSTEMS

Vestnik MGSU 5/2017 Volume 12
  • Pavlov Evgeniy Igorevich - OOO Technology Center TENA engineer-technologist, service and technical support department, OOO Technology Center TENA, 5, bldg 1, Okrugnoi proezd, Moscow, 107553, Russian Federation.
  • Belov Viktor Aleksandrovich - Moscow State University of Civil Engineering (National Research University) (MGSU) Candidate of Technical Sciences, Associate Professor, Department of Construction Mechanization, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation.
  • Shcherbina Sergey Viktorovich - Moscow State University of Civil Engineering (National Research University) (MGSU) postgraduate, Department of Construction Mechanization, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation.

Pages 545-551

Experimental study of bearing capacity of samples of two series performed by semiautomatic welding in CO2 on the axis, and by robotic welding machine in mixture (CO2 + Ar), is presented. Welds of constant cross section, welds with extended leg on end sections, and welds in the form of two dowels on end sections were performed. Efficiency of pilot samples of the first series (with extended leg on end sections by way of a smooth transition) defined by the ratio of weld metal volume to a crushing load reaches 28 % relative to samples with a leg constant as per length. Samples of the first series with an extended leg on end sections also showed efficiency increased to 17 %. According to the second series samples test results, the exceeding of bearing capacity of the samples performed with an extended leg on end sections by 24 % in comparison with the samples with a leg of constant cross section was determined. Samples of the second series performed in the form of two dowels on end sections demonstrated the exceeding of the relative bearing capacity by 42 % in comparison with the samples with a continuous leg of constant cross-section.

DOI: 10.22227/1997-0935.2017.5.545-551

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X-ray phase analysisof the filler composition based on W B – FeCr – FeV

Vestnik MGSU 3/2013
  • Kyazymov Fuzuli Agababaevich - OAO MZKO «Krasnyy Oktyabr’» (Red October Volgograd Steel Works) Process Engineer, OAO MZKO «Krasnyy Oktyabr’» (Red October Volgograd Steel Works), 110 pr. Lenina, Volgograd, 400007, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Popov Pavel Vladimirovich - Volzhskiy Institute of Humanities, Branch of Volgograd State University (VolGU) Candidate of Technical Sciences, Associate Professor, Department of Applied Mathematics and Computer Science, Volzhskiy Institute of Humanities, Branch of Volgograd State University (VolGU), 11, 40 Let Pobedy str., Volzhskiy, Volgograd Region, 404133, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 135-139

The authors believe that development of wear resistant coating compositions basedon W Bis an important task aimed at improvement of durability of working parts of2 2machines. X-ray analysis of coating composition W B – FeCr – FeV is presented in the2 2article. The results of chemical and X-ray analyses of the coating composition comprisingW B – FeCr – 10 % FeV demonstrate that, when the weld metal formed, W Bpartially2 5 2 5dissociates to form borides, vanadium, iron, and chromium. High iron content in thesolid solution causes reduction of its hardness and wear resistance. A 20 % increase in the tungsten boride content leads to formation of elongated grains in the matrix of ironborides, vanadium and chromium borides. A composition containing 4 % of W Bhas a2 5fine-grained structure, and it is characterized by the absence of FeB in the weld metal,and its absence means lower brittleness. In the metal, carbon borides are formed to assure its high hardness. In the matrix, a significant amount of vanadium and chromium is dissolved to help improve its hardness. The study shows that the composition containing40 % of W Bhas a fine-grained structure, and it is characterized by the absence of FeB2 5in the weld metal. Therefore, the coating layer demonstrates the highest resistance toabrasion.

DOI: 10.22227/1997-0935.2013.3.135-139

References
  1. Gustov Yu.I., Popov P.V., Kyazymov F.A. Issledovanie vliyaniya borida vol’frama na strukturu i svoystva naplavlennogo metalla [Research into the Influence of Tungsten Boride onto the Structure and Properties of the Filler Metal]. Novoe v metallovedenii. Sbornik nauchnykh trudov. [Novelties in the Metal Science. Collection of Scientific Works.]. Moscow, MGSU Publ., 2007, pp. 51—53.
  2. Kosolapova T.Ya., editor. Svoystva, poluchenie i primenenie tugoplavkikh soedineniy [Properties, Extraction and Application of Refractory Compounds]. Moscow, Metallurgiya Publ., 1986, 928 p.
  3. Kyazymov F.A., Oreshkin V.D., Popov P.V. Abrazivnaya iznosostoykost’ kompozitsionnykh materialov na osnove W2B5 [Abrasive Wear Resistance of Composite Materials Based on W2B5]. Novye perspektivnye materialy i tekhnologii ikh polucheniya NPM — 2007. Sb. tr. [New Materials and Technologies for Their Generation NPM-2007. Collection of Works]. Volgograd, VGTU Publ., 2007, pp. 175—176.
  4. Kyazymov F.A., Oreshkin V.D., Popov P.V. Vliyanie sily toka na strukturu naplavochnogo materiala W2B5 – FeCr – FeV [Influence of Current Intensity on Structure of Filler Material W2B5 – FeCr – FeV]. Izvestiya Volgogradskogo gosudarstvennogo tekhnicheskogo universiteta. Mezhvuz. sb. nauch. statey [News of Volgograd State Technical University. International Collection of Research Papers]. 2009, no. 11(59), pp. 69—70.
  5. Kyazymov F. A., Popov P.V. Khimicheskiy analiz naplavochnoy kompozitsii na osnove W2B5 [Chemical Analysis of the Filler Composition Based on W2B5]. Izvestiya Volgogradskogo gosudarstvennogo tekhnicheskogo universiteta. Mezhvuz. sb. nauch. statey. [News of Volgograd State Technical University. International Collection of Research Papers]. 2010, no. 4(64), pp. 81—83.
  6. Skudnov V.A. Zakonomernosti predel’noy udel’noy energii deformatsii — osnovnoy sinergeticheskoy (kooperativnoy) kharakteristiki razrusheniya i rabotosposobnosti metallov [Regularities of the Limit Unit Energy of Deformations as the Principal Synergetic (Cooperative) Characteristic of Destruction and Serviceability of Metal]. Materialovedenie i metallurgiya. Trudy NGTU. [Material Science and Metallurgy. Works of Nizhegorodskiy State Technical University]. Nizhniy Novgorod, 2004, vol. 42, pp. 94—101.
  7. Gustov Yu.I. Sinergeticheskie kriterii metallov [Synergetic Criteria of Metals]. Novoe v metallovedenii. Sb. nauch. tr. [Novelties in the Metal Science. Collection of Research Works.] Moscow, MGSU Publ., 2007, pp. 3—9.

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