Correlation between failures causes, quality indices and forging technology of products for metallurgical equipment and transport
Abstract
Vasylevskyi O.V., Kukhar V.V. Correlation between failures causes, quality indices and forging technology of products for metallurgical equipment and transport. Indices for characteristic of quality of products for the metallurgical equipment and transport that produced by forging were analyzed. Correlation between the quality indices of forged parts and durability of work-parts that made of such forgings is shown. The numbers of experimental and industrial research were made in terms of press-forging shop of LLC "Metinvest – Mariupol Mechanical Repair Plant" that allowed to determine the effect of the mechanical properties, macrostructure and microstructure, obtained by forging used modes, on the performance characteristics of forged parts. Investigations were carried out with respect to products manufactured from steel 25X1M1Ф, 40ХН2MA and Steel 45 grades on the hydraulic forging press DP1141A1 model with 12.5MN nominal strength. Spectral method for determining the chemical composition of steel, ultrasonic inspection method, metallographic methods for determining segregation sulfuric fingerprint, macrostructure and microstructure, standardized methods of mechanical tests used to analyze. In addition to research directly to fractures and destruction of places, devoted considerable attention to technological and thermomechanical modes under which were to forge defective products. Executed generalization of breakdowns (failures) causes "Mouthpiece", "Dorn 12 '", "Roller", "Axis" parts has allowed to determine that the main direction of increasing the resistance of the details of metallurgical equipment and transport is the development of modes of forging that providing the uniformity of the accumulated deformation (local working of cast metal), and the uniformity of the microstructure, generally uniform of mechanical properties in the parts’ cross sections. Keywords: forged products, forging mode, reducing of square, quality indices, microstructure, failure cause, method of quality control.References
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11. Tarnowskiy I.Ja., Trubin V.N., Zlatkin M.G. Svobodnaja kovka na pressah [Free forging by presses], M., Mashinostroenie, 1967., 327 p.
2. Chukhleb V.L., Tumko A.N., Ashkeljanets A.V. Osnovy razrabotki tehnologicheskih processov obrabotki davleniem stalej i splavov s prognoziruemym urovnem kachestva metalloprodukcii [Basics of development of technological processes of metalforming of steels and alloys with forecast level of products quality], Vіsnik Nacіonal'nogo tehnіchnogo unіversitetu “KhPІ”, zb. nauk. pr., Temat. vyp. Novі rіshennja v suchasnih tehnologіjah, Kharkіv, NTU «KhPІ», 2011, Vol. 47, pp. 110-120.
3. Panchenko A.I., Tumko A.N., Fomin E.S., etc. Razvitie proizvodstva krupnyh pokovok iz special'nyh stalej v uslovijah PAO "Dneprospecstal'" [The development of large forgings production from special steels in a JSC "DSS"], Obrabotka materialov davlenie, sb. nauch. tr., Kramatorsk, DGMA, 2012, Vol. 2(31), pp. 79-84.
4. Kornievskiy V.N., Salnikov A.S., Tumko A.N., Logozinskiy I.N., Shibeko P.A. Razvitie tehnologii proizvodstva prokata i pokovok iz vysokolegirovannyh instrumental'nyh stalej v uslovijah PAO «Dneprospecstal'» [Development of the technology of production of rolled and forged products from high-alloys tool steels in a JSC "DSS"], Obrabotka materialov davleniem, sb. nauch. tr., Kramatorsk, DGMA, 2013, Vol. 4(37), pp. 153-159.
5. Zjuban N.A., Rutskij D.V., Gamanjuk S.B. Issledovanie osevyh defektov kuznechnyh slitkov i pokovok iz nih valov potopov tupbogenepatopov [A study of axial defects of forging ingots and forgings of these shafts rotors of turbogenerator], Tehnologija mashinostroenija, 2010, issue 11, pp. 13-16.
6. Krutasova E.I. Nadezhnost' metalla jenergeticheskogo oborudovanija [Reliability of the metal for power equipment], M ., Energoizdat, 1981, 240 p.
7. Kukhar V.V., Korotkij S.A., Vasilevskij O.V. Tehnologicheskaja nasledstvennost' pri formoobrazovanii udlinjonnyh pokovok s zaostrennym koncom sposobom prodol'nogo razryva zagotovki [Technological heredity in forming of elongated forgings with the pointed end by the process of longitudinal rupture of workpiece], Teoretichnі і prikladnі zadachі obrobki metalіv tiskom ta avtotehnіchnih ekspertiz, mіzhnar. nauk.-tehn. konf., tez. dopovіdey, Vіnnitsya, VNTU, 2011, pp. 98-99.
8. Polukhin P.I., Nikolaev V.A., Polukhin V.P., etc. Prochnost' prokatnyh valkov [Strength of the rolls], Alma-Ata: Nauka, 1984, 295 p.
9. Kochura N.N. Stojkost' rolikov pri mnogoprohodnom nakatyvanii krupnoprofil'nyh rez'b [Resistance rolls with multipass rolling of large-profile threads], Omskij nauchnyj vestnik, 2011, issue 3(103), pp. 87-90.
10. Borovik L.I., Pimenov A.F. Prichiny vyhoda iz stroja valkov holodnoj prokatki [Reasons of failure of the rolls for cold rolling], Stal', 1961, issue 8, pp. 716-719.
11. Tarnowskiy I.Ja., Trubin V.N., Zlatkin M.G. Svobodnaja kovka na pressah [Free forging by presses], M., Mashinostroenie, 1967., 327 p.
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2016-07-26
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Василевский, О., & Кухарь, В. (2016). Correlation between failures causes, quality indices and forging technology of products for metallurgical equipment and transport. Problems of Tribology, 80(2), 47–53. Retrieved from https://tribology.khnu.km.ua/index.php/ProbTrib/article/view/533
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