Tribostrain and Thermoelectric Characteristics of the Friction Process During Turning of a Hybrid Part with a Welded Seam

The article is devoted to the evaluation of tribological and thermoelectric characteristics of the process of turning a hybrid part made of 09G2S steel, the surface of which contains a weld, with plates of T15K6 hard alloy at different cutting speeds. In this paper, the rake face of the lathe cutter, which contacts at the stage of cutting into the weld with chips of different composition, is presented as two parallel functioning heavily loaded tribosystems with variable geometric parameters of contact, which differ in tribodeformation indicators and surface temperature. The composition and geometric characteristics of fragments for each processed material were determined using the graphic model of the removed non-uniform allowance. Based on the obtained dimensions of the hybrid allowance elements, the maximum contact temperatures were calculated for each tribosystem at different cutting speeds. The processing modes were determined that ensure a minimum difference in surface temperatures on different sections of the rake face of the cutting inserts, which increases the thermoelectric stability of the turning process. In the course of full-scale experiments it was established that the turning modes, in which, according to the calculated data, more uniform heating of the front face occurs, are also characterized by minimal fluctuations of the relative thermoEMF at the stage of cutting the plate into the weld. Exceeding these turning speeds in the studied cutting system leads to an in-crease in negative thermoelectric effects, contributing to the intensification of the wear process of the cutting plates. The presented research results, in combination with other technological factors for choosing the processing modes, can become an additional tool for assigning permissible turning speeds for welded sections on hybrid parts.

1. Denkena B., Behrens B.A., and Overmeyer L. Sensitivity of Process Signals to Deviations in Material Distribution and Material Properties of Hybrid Workpieces // The International Journal of Advanced Manufacturing Technology. — 2024 (130), 2649—2659. https://doi.org/10.1007/s00170-023-12807-x

2. Denkena B., Bergmann B., and Breidenstein B. Analysis of Potentials to Improve the Machining of Hybrid Workpieces // Production Engineering-Research and Development. — 2019 (13), 11—19. https://doi.org/10.1007/s11740-018-00870-3

3. Bychkovsky V.S., Filippenko N.G., Popov S.I., Kargapoltsev S.K. Study of the properties and machinability of welded joints using a combined rotary cutter with a chip breaker // Modern technologies. Systems analysis. Modeling. — 2018, no. 1(57), 16—23 (in Russian)

4. Danielyan A.M., Bobrik P.I., Gurevich Ya.L. et al. Cutting of heat-resistant steels, alloys and refractory metals. — M.: Mechanical Engineering. — 1965 (in Russian)

5. Reznikov A.N. Thermal physics of cutting. — M.: Mechanical Engineering. — 1969 (in Russian)

6. Chichinadze A.V., Shuchev K.G., Ryzhkin A.A., Filipchuk A.I., and Klimov M.M. Temperature Regime During Friction of Tool Materials Taking into Account the Volume of the Heat Source // Friction and Wear. — 1986, no. 7, 43—51

7. Ryzhkin A.A. Synergetics of tool materials’ wear during blade processing: monograph. — Don State Technical University. — Rostov-na-Donu: DSTU. — 2019 (in Russian)

8. Ryzhkin A.A. Synergetics of wear of cutting tool materials (triboelectric aspect). — Rostov n/D: publishing center of DSTU. — 2004 (in Russian)

9. Bobrov, V.F., Granovsky G.I., Zorev N.N., et al. Development of the science of metal cutting. — Moscow: Mechanical Engineering. — 1968 (in Russian)

10. Silin S.S. Similarity methods in cutting materials. — M.: Mechanical Engineering. — 1979 (in Russian)

11. Ryzhkin A.A. Thermophysical processes during wear of tool cutting materials. — Rostov-on-Don: Publishing center of DSTU. — 2005 (in Russian)

12. Fominov E.V., Aliev M.M., Shuchev K.G., Marchenko A.A. The Influence of Zirconium and Titanium Nitride Based Coatings on Tribodeformation Processes of Friction While Cutting with Carbide Inserts // Friction and Wear. — 2024 (45), № 1, 29—37 (in Russian)

13. Fominov E.V., Marchenko A.A., Sukhomlino-va V.V., Pyatnitskaya O.A., Gladkikh D.I. Modeling of temperature distribution on the front surface of a turning tool taking into account the geometric parameters of the zone of secondary plastic deformations // Transport engineering. — 2023, № 2(14), 4—11. https://doi.org/10.30987/2782-5957-2023-2 (in Russian)

14. Lebedev V.A., Aliev M.M., Fominov E.V., Fomenko A.V., Marchenko A.A., and Mironenko A.E. Thermoelectric Characteristics of the Process Steel Turning by Carbide Inserts with Combined Coatings // Friction and Wear. — 2023 (44), no. 2, 114—121