Naberezhnye Chelny Institute of Kazan Federal University, Naberezhnye Chelny, Russia:

V. G. Shibakov, Dr. Eng., Prof., Head of the Dept. “Mechanical Engineering”, e-mail: vladshib50@gmail.com
D. L. Pankratov, Dr. Eng., Director of the Higher Engineering School, e-mail: pankratovdl@gmail.com
A. M. Valiev, Cand. Eng., Associate Professor, e-mail: cct-ineka@yandex.ru
R. V. Shibakov, Cand. Eng., Associate Professor

The increase in the carrying capacity of KAMAZ vehicles necessitates the use of heavyduty hot-rolled thick-sheet rolled products made of microalloyed steels with a high yield strength for the production of sheet stamping. The development of the production of such parts faces problems of ensuring stampability, which requires finding ways to increase it both in the metallurgical and machine-building processing of rolled products. Based on expert assessments of specialists, generalization of production experience, modeling of plastic flow in sheet stamping operations, field experiments, the thinning deformations responsible for the appearance of defective signs (cracks excessive refinement) in stamped parts are estimated. The influence of the parameters of the processed material, workpiece, technology on the deformation of thinning is established, the directions of increasing the stampability on a specific part “Bracket” are shown.

1. Grechnikov F. V., Gorshkov Yu. S., Mishin А. М. Investigation of the influence of the method of cutting aluminum sheet blanks on crack formation during cold sheet stamping. Izvestiya Samarskogo nauchnogo tsentra Rossiyskoy akademii nauk. 2015. Vol. 17. No. 6–3. pp. 632–635.
2. Demin V. А. Design of plate forging processes based on the prediction of technological failures. Moscow: Mashinostroenie-1, 2002. 186 p.
3. Matyuk V. F., Goncharenko S. А., Hartmann H., Reichelt H. The current state of non-destructive testing of the mechanical properties of the formability of rolled steel sheets in the process production flow. Defektoskopiya. 2003. No. 5. pp. 19–60.
4. Averkiev А. Yu. Sheet metal formability evaluation methods. Moscow: Mashinostroenie, 1985. 176 p.
5. Feofanova А. Е. Influence of prestretching on sheet metal formability. Mechanics of a deformable body and metal forming. Collection of scientific works. Part 1. Tula: TulGU, 2001. pp. 75–80.
6. Efron L. I., Morozov Yu. D. Investigation of the influence of controlled rolling modes on the microstructure and properties of microalloyed steels. Metallurg. 2018. No. 1. pp. 69–74.
7. Kashapova L. R., Pankratov D. L., Shibakov V. G. Automated generation of rational sheet metal forming technology variants at process engineering stage. Procedia Engineering. International Conference on Industrial Engineering, ICIE 2017. 2017. pp. 1348–1354.
8. Kashapova L. R., Pankratov D. L., Shibakov V. G. Methodology for automated assessment of the reliability of the technological process of sheet stamping. Kuznechno-shtampovochnoe proizvodstvo. Obrabotka materialov davleniem. 2014. No. 7. pp. 32–37.
9. Kashapova L. R., Pankratov D. L., Shibakov V. G. Methodology for automated assessment of the reliability of the technological process of sheet stamping at the stage of its design. Fundamentalnye issledovaniya. 2014. No. 8–7. pp. 1533–1538.
10. Feofanova А. Е. Experimental studies of limiting shape change in sheet stamping. Zagotovitelnye proizvodstva v mashinostroenii. 2004. No. 6. pp. 19–22.
11. Umanskiy А. А., Golovatenko А. V., Temlyantsev М. V., Dorofeev V. V. Experimental studies of plasticity and deformation resistance of chromium rail steels. Chernye Metally. 2019. No. 6. pp. 24–28.
12. Pater Z., Tomczak J., Bulzak T., Cyganek Z., Andrietti S., Barbelet M. An innovative method for producing balls from scrap rail heads. The International Journal of Advanced Manufacturing Technology. 2018. Vol. 97. pp. 893–901. DOI: 10.1007/s00170-018-2007-9.
13. Heisterkamp F., Khulka К., Matrosov Yu. I. et al. Niobium-containing low-alloy steels. Moscow: SP Intermet Inzhiniring, 1999. 94 p.
14. GOST 19903–2015. Hot-rolled steel sheets. Dimensions. Introduced: 01.09.2016.
15. Umanskiy А. А., Dorofeev V. V., Dumova L. V. Development of theoretical foundations for energy-efficient production of railway rails with improved performance properties. Izvestiya vuzov. Chernaya Metallurgiya. 2020. Vol. 63. No 5. pp. 318–326.
16. Chen Lin, Bi Ke. Study on simulation experiment with universal pass rolling deformation for heavy rail. Advanced Materials Research. 2012. Vol. 430–432. pp. 525–529.
17. Hohenwarter A., Pippan R. Fracture of ECAP-deformed iron and the role of extrinsic toughening mechanism. Acta Materialia. 2013. Vol. 61. No. 8. pp. 2973–2983.
18. GOST 18895–97. Steel. Method of photoelectric spectral analysis. Introduced: 01.01.1998.
19. GOST 8233–56. Steel. Microstructure standards. Introduced: 01.07.1957.
20. GOST 5640–2020. Steel. Metallographic method for determination of microstructure of flat rolled product. Introduced: 01.10.2021.
21. GOST 5639–82. Steels and alloys. Methods for detection and determination of grain size. Introduced: 01.01.1983.
22. GOST 1778–70. Steel. Metallographic methods for determination of nonmetallic inclusions. Introduced: 01.01.1972.
23. Industrial Standard OST 37.001.246–82. Unspecified limit deviations of dimensions, tolerances of the shape and location of surfaces. Introduced: 01.12.2022.