Abstract
The influence of a nonuniform distribution of the mechanical properties of rolled sheet steel on the shape of a pipe billet in making large-diameter pipes in the 1420 pipe-electric welding unit line is studied. The technique and results of measuring the hardness along the perimeter of the initial 25.8 × 4340 × 12 200 mm rolled sheet of strength class K60 are presented. The hardness of the sheet is maximal in the longitudinal direction at the tail end and is minimal at the center. The height and radius of the crimped edge are measured after crimping. The geometric discrepancy in the billet edges along the length is larger than that across the width by 6%. The horizontal and vertical diameters, the gap width, the edge displacement in height, and the diameters at l = 100 mm from the edge end are measured after step-by-step forming. The dependence of the gap width of the pipe billet after forming on the yield strength of the rolled sheet is determined.
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REFERENCES
A. S. Ushakov and L. A. Kondratov, “On the production of steel pipes,” Stal’, No. 7, 36–40 (2017).
O. V. Yuzov and T. M. Petrakova, “Trends in the steel pipe production indicators at Russian enterprises,” Stal’, No. 9, 71–77 (2015).
N. I. Novikov and L. V. Zagorodnova, “Innovative activity in the ferrous metallurgy in Russia and abroad: similarities and differences,” Ekonomika v Prom., No. 4, 18–23 (2015).
GOST 26877–91. Metal Products. Methods for Measuring the Shape Deviation (Izd. Standartov, Moscow, 1991).
TU 1381-012-057578–2005. Longitudinal Electric-Welded Steel Pipes with an Outer Diameter of 508–1420 mm for Main Pipelines at a Working Pressure of up to 9.8 MPa. Specifications (Derzh. Podl.).
E. S. Lobusov and M. T. Hoang, “Measurement of the ovality of large-diameter pipes by inertial means,” Avtomat. Sovr. Tekhnol., No. 11, 38–42 (2016).
M. A. Tovmasyan, S. V. Samusev, and V. A. Sazonov, “Investigation of the forming of large-diameter pipes using modern computer systems,” Metallurg, No. 2, 54–58 (2016).
A. G. Kolmakov, V. F. Terent’ev, and M. B. Bakirov, Hardness Measurement Methods: A Handbook, 2nd ed. (Intermet Inzh., Moscow, 2005).
GOST 9031–75. Standard Hardness Measures. Specifications (Izd. Standartov, Moscow, 2004).
S. Useinov, V. Solov’ev, and K. Gogolinskii, “Measurement of the mechanical properties of materials at a nanometer spatial resolution,” Kontrol’ Izmeren., No. 2, 30–35 (2010).
S. V. Samusev and M. A. Tovmasyan, “Mathematical and physical modeling of the step-by-step forming process according to the JCOE scheme on the laboratory machine of TsIL ITC OAO VMZ,” Proizv. Prokata, No. 11, 16–21 (2014).
Li-Feng Fan, Jia-Xin Yan, Ying Gao, and Jian-Bin Yun, “Research on deformation characteristics of JCOE forming in large diameter welding pipe,” Adv. Manuf. Technol., No. 10, 268–277 (2016).
E. Tsuru, J. Agata, Y. Nagata, S. Shirakami, and Y. Shinohara, “Forming and buckling simulation on high- strength UOE pipe with plastic anisotropy,” Nippon Steel Tech. Report., No. 102, 70–78 (2013).
Fan Lifeng, Gao Ying, Li Qiang, and Xu Hongshen, “Quality control on crimping of large diameter welding pipe,” Chin. J. Mech. Eng. 25 (6), 1264–1273 (2012).
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Translated by K. Shakhlevich
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Tovmasyan, M.A., Samusev, S.V. Effect of the Nonuniform Distribution of the Mechanical Properties of Rolled Sheets on the Shape of a Round Billet after Forming in Making Large-Diameter Pipes. Russ. Metall. 2020, 589–596 (2020). https://doi.org/10.1134/S0036029520050158
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DOI: https://doi.org/10.1134/S0036029520050158