Mathematical Modeling of Technological Parameters of the Process of Obtaining Antifriction Alloys Based on the Charge of Electroerosive Lead Bronze

The purpose. Optimization of technological parameters of the manufacturing process of antifriction alloys based on EDM lead bronze charge.

Methods. To obtain an experimental charge, an installation for grinding metal waste into metal particles suitable for industrial use was used, lead bronze grade BrS30 in the form of shavings (GOST 493-79) was used as the metal waste, distilled water was the working medium for dispersion. 6709-72 (oxygen-containing) and lighting kerosene GOST 11128-65 (carbon-containing)

The study of microhardness of workpieces of antifriction alloys was carried out on a digital microhardness tester  DM-8.

Optimization of the technological parameters of the process of manufacturing antifriction alloys was carried out according to the average microhardness of the obtained samples by setting up a complete factorial experiment of type 2³.

Results. In the course of the calculations, the optima (maximum values of the output parameter y ̂) were calculated, amounting to: for workpieces from a charge obtained in water 67.7 HV at a pressing pressure of 1500 MPa, a sintering temperature of 830°C, and a holding time of 2 h; for workpieces from a charge obtained in kerosene 52.8 HV at a pressing pressure of 1600 MPa, a sintering temperature of 850°C and a holding time of 2 hours.

Conclusion. Based on the presented results of research and calculations, it can be concluded that the microhardness of antifriction alloy blanks based on charge obtained in water exceeds by 15% the microhardness of antifriction alloy blanks based on charge obtained in kerosene. The presence of free carbon in the composition of the charge obtained in kerosene prevents the production of dense compacts and, as a result, leads to an increase in the final porosity of the workpiece and a decrease in its hardness.

1. Osintsev O. E., Fedorov V. N. Med' i mednye splavy. Otechestvennye i zarubezhnye marki [Copper and copper alloys. Domestic and foreign brands]. 2th. Moscow, Innovatsionnoe mashinostroenie Publ., 2016. 359 p.

2. Petrichenko V. K. Antifriktsionnye materialy i podshipniki skol'zheniya [Antifriction materials and sliding bearings]. Moscow, Mashgiz Publ., 1954. 383 p.

3. Shestopalova L. P. Konstruktsionnye i zashchitno-otdelochnye materialy transportnykh sredstv [Structural and protective and finishing materials of vehicles]. Moscow, MADI Publ., 2019. 216 p.

4. Shidlovsky A. K., eds. Povyshenie kachestvennykh pokazatelei i elektroerozionnogo dispergirovaniya metallov s uchetom vzaimnogo vliyaniya kharakteristik istochnika pitaniya i tekhnologicheskogo apparata [Improving the quality indicators and electroerosive dispersion of metals, taking into account the mutual influence of the characteristics of the power source and the technological apparatus]. Sovershenstvovanie elektrooborudovaniya i sredstv avto- matizatsii tekhnologicheskikh protsessov promyshlennykh predpriyatii [Improvement of electrical equipment and automation of technological processes of industrial enterprises]. Komsomolsk-on-Amur, KnAPI Publ., 1986. pp. 98–99.

5. Bayramov P. K. Poluchenie vysokodispersnykh poroshkov metallov i ikh soedinenii elektroiskrovym dispergirovaniem metallov [Obtaining highly dispersed powders of metals and their compounds by electric spark dispersion of metals]. Moscow, MISIS Publ., 2012. 80 p.

6. Milyakh A. N., Muratov V. A., Shcherba A. A. Stabilizatsiya rezhimov ob"emnogo parametrov elektroerozionnogo dispergirovaniya metallov [Features of control of modes of power sources of installations of electroerosive dispersion of metals]. Problemy preobrazovatel'noi tekhniki = Problems of conversion technology, 1983, pt. 5, pp. 201–204.

7. Milyakh A. N., Shcherba A. A., Muratov V. A. Stabilizatsiya rezhimov ob"emnogo parametrov elektroerozionnogo dispergirovaniya metallov [Stabilization of modes of volumetric parameters of electroerosive dispersion of metals]. Sostoyanie i perspektivy razvitiya elektrotekhnologii = State and prospects of development of electrotechnology, 1985, pt. 2, pp. 161–162.

8. Ageev E. V., Semenikhin B. A., Latypov R. A. Issledovanie mikrotverdosti poroshkov, poluchennykh elektroerozionnym dispergirovaniem tverdogo splava [Investigation of microhardness of powders obtained by electroerosive dispersion of a hard alloy]. Vestnik Moskovskogo gosudarstvennogo agroinzhenernogo universiteta imeni V. P. Goryachkina = Bulletin of the V. P. Goryachkin Moscow State Agroengineering University, 2011, no. 1 (46), pp. 78–80.

9. Latypov R. A., Latypova G. R., Ageev E. V., Davydov A. A. Razrabotka i issledovanie tverdosplavnykh izdelii iz poroshkov, poluchennykh elektroerozionnym dispergirovaniem vol'framsoderzhashchikh otkhodov [Development and research of carbide products from powders obtained by electroerosive dispersion of tungsten-containing waste]. Mezhdunarodnyi nauchnyi zhurnal = International Scientific Journal, 2013, no. 2, pp. 107–112.

10. Latypov R. A., Korostelev A. B., Ageev E. V., Semenikhin B. A. Svoistva poroshkov iz otkhodov tverdykh splavov VK8 I T15K6, poluchennykh metodom elektroerozionnogo dispergirovaniya [Properties of powders from waste of hard alloys VK8 and T15K6 obtained by the method of electroerosive dispersion]. Vse materialy. Entsiklopedicheskii spravochnik = All materials. Encyclopedic reference, 2010, no. 7, pp. 2–6.

11. Ageeva E. V., Horyakova M., Ageev E. V. [Morphology of Copper Powder Produced by Electrospark Dispersion from Waste]. Russian Engineering Research, 2014, vol. 34, no. 11, pp. 694–696.

12. Sergeev N. N., Gvozdev A. E., Sergeev A. N., Tikhonova I. V., Kutepov S. N., Kuzovleva O. V., Ageev E. V. Perspektivnye stali dlya kozhukhov domennykh agregatov [Pro- mising steels for blast furnace casings]. Izvestiya Yugo-Zapadnogo gosudarstvennogo universiteta. Seriya: Tekhnika i tekhnologii = Proceedings of the Southwest State University. Series: Engineering and Technology, 2017, vol. 7, no. 2 (23), pp. 6–15.

13. Medvedeva V. V., Breki A. D., Krylov N. A., Skotnikova M. A., Fadin Yu. A., Alexandrov S. E., Gvozdev A. E., Starikov N. E., Provotorov D. A., Sergeev A. N., Ageev E. V. Issledovanie protivoiznosnykh svoistv plastichnogo smazochnogo kompozitsionnogo materiala, soderzhashchego dispersnye chastitsy sloistogo modifikatora treniya [Investigation of anti-wear properties of a plastic lubricating composite material containing dispersed particles of a layered friction modifier]. Izvestiya Yugo-Zapadnogo gosudarstvennogo universiteta = Proceedings of the Southwest State University, 2016, no. 1 (64), pp. 75–82.

14. Medvedeva V. V., Breki A. D., Krylov N. A., Alexandrov S. E., Gvozdev A. E., Starikov N. E., Sergeev N. N., Ageev E. V., Sergeev A. N., Maliy D. V., Provotorov D. A. Tribotekhnicheskie svoistva plastichnykh smazochnykh kompozitsionnykh materialov s napolnitelyami iz dispersnykh chastits medi i tsinka [Tribotechnical properties of plastic lubricating composite materials with fillers from dispersed particles of copper and zinc]. Izvestiya Yugo-Zapadnogo gosudarstvennogo universiteta = Proceedings of the Southwest State University, 2016, no. 2 (65), pp. 109–119.

15. Breki A. D., Didenko A. L., Kudryavtsev V. V., Vasilyeva E. S., Tolochko O. V., Kolmakov A. G., Fadin Yu. A., Starikov N. E., Gvozdev A. E., Sergeev N. N., Ageev E. V., Provotorov D. A. Tribotekhnicheskie kharakteristiki kompozitsionnykh pokrytii s matritsei iz poligeteroarilena PM-DADFE i napolnitelyami iz nanochastits dikhal'kogenidov vol'frama pri trenii skol'zheniya v srede zhidkogo smazochnogo materiala [Tribotechnical characteristics of composite coatings with a matrix of polyheteroarylene PM-DADFE and fillers of tungsten dichalcogenide nanoparticles during sliding friction in a liquid lubricant medium]. Izvestiya Yugo-Zapadnogo gosudarstvennogo universiteta = Proceedings of the Southwest State University, 2016, no. 3 (66), pp. 17–28.

16. Ageev E. V., Semenikhin B. A., Ageeva E. V., Latypov R. A. Issledovanie khimicheskogo sostava poroshkov, poluchennykh elektroerozionnym dispergirovaniem tverdogo splava [Investigation of the chemical composition of powders obtained by electroerosive dispersion of a hard alloy]. Izvestiya Yugo-Zapadnogo gosudarstvennogo universiteta = Proce- edings of the Southwest State University, 2011, no. 5 (38), pt. 1, pp. 138a–144.

17. Ageeva E. V., Latypov R. A., Burak P. I., Ageev E. V. Poluchenie tverdosplavnykh izdelii kholodnym izostaticheskim pressovaniem elektroerozionnykh poroshkov i ikh issledovanie [Obtaining hard-alloy products by cold isostatic pressing of electroerosive powders and their research]. Izvestiya Yugo-Zapadnogo gosudarstvennogo universiteta = Proceedings of the Southwest State University, 2013, no. 5 (50), pp. 116–125.

18. Ageev E. V., Latypova G. R., Davydov A. A., Ageeva E. V. Provedenie rentgenospektral'nogo mikroanaliza tverdosplavnykh elektroerozionnykh poroshkov [Conducting Xray spectral microanalysis of carbide electroerosion powders]. Izvestiya Yugo-Zapadnogo gosudarstvennogo universiteta = Proceedings of the Southwest State University, 2012, no. 5 (44), pt. 2, pp. 99–102.

19. Ageev E. V., Gadalov V. N., Ageeva E. V., Bobryshev R. V. Poroshki, poluchennye elektroerozionnym dispergirovaniem otkhodov tverdykh splavov – perspektivnyi material dlya vosstanovleniya detalei avtotraktornoi tekhniki [Powders obtained by electroerosive dispersion of solid alloy waste - a promising material for the restoration of parts of automotive Юго-Западного государственного университета. Серия equipment]. Izvestiya Yugo-Zapadnogo gosudarstvennogo universiteta = Proceedings of the Southwest State University, 2012, no. 1 (40), pt. 1, pp. 182–189.

20. Spiridonov A. A. Planirovanie eksperimenta pri issledovanii tekhnologicheskikh protsessov [Experiment planning in the study of technological processes]. Moscow, Mashinostroenie Publ., 1981. 184 p.