The influence of termination of the getting on contact extent steel x12 at termination

  • П.В. Каплун
  • В.А. Гончар
  • А.В. Паршенко
Keywords: сontact endurance, hardening, residual austenite, hardness

Abstract

The results of experimental studies of the influence of the tempering temperature of X12 steel on its hardness, the content of residual austenite in the structure of the material, and the contact durability of the rolling gravity in the lubricant and-20.  It is shown that as the temperature of the quenching of steel increases, the amount of residual austenite increases in the structure of the material, which increases with a tempering temperature and reaches 90% at a temperature of 1120 ° C. This leads, accordingly, to a decrease in the microhardness of the material from H100 = 8520 to 5280 MPa. Installed non-linear dependence between the content of residual austenite in the steel and its contact endurance when rolling friction. It is shown that in the process of rolling a portion of the residual austenite is transformed into martensite under the action of plastic deformation. Resulting in increase of surface hardness and durability of steel. The influence of the martensitic transformation to increase the hardness and durability in the rolling friction can be estimated using the ratio of the completeness of the martensitic transformation Km, which for X12 steel after quenching is in the range of 0.28 – 0.3 mm. In the process of martensitic transformation there is a partial absorption of deformation energy, which, together with the increase of the hardness of the deformed layer, helps to increase the durability of steel.  The optimal value of retained austenite content of 30% in the structure of X12 steel at which the maximum contact her endurance

References

1. Koval'skij B. S. Raschet detalej na mestnoe szhatie. HVKIU, Har'kov, 1967, 222 s.
2. Dzhonson K. Mehanika kontaktnogo vzaimodejstvija/ [per. s angl. V.Je. Naumova, A.A. Spektora]. M. Mir, 1989. 510 s.
3. Pinegin S. V. Rabotosposobnost' detalej podshipnikov. M., Mashgiz, 1949.–168 s.
4. Perel', L.Ja. Podshipniki kachenija: Raschet, proektirovanie i obsluzhivanie opor [Tekst] spravochnik. M. Mashinostroenie, 1983. 543 s.
5. Trubin G.K. Kontaktnaja ustalost' materialov dlja zubchatih kales. M, Mashgiz, 1962, 403 s.
6. Zinchenko V.M. Inzhenerija poverhnosti zubchatih koles metodami himiko-termicheskoj obrabotki. M.: Izd-vo MGTU im. N.Je.Baumana, 2001. 303 s.
7. Sosnovskij L. A. Mahutov N. A., Troshhenko V. T. /O razvitii predstavlenij ob ustalosti metallov pri ob#emnom nagruzhenii i trenii. Tr. VI-go Mezhdunarodnogo simpoziuma po tribofatike (ISTF 2010), 25 oktjabrja 1 nojabrja 2010 g., Minsk (Belarus'). Minsk: BGU, 2010. T. 1. S. 77-84.
8. Grozin B.D., Kosteckij B.I. Iznos v zubchatyh peredachah/ / «Vestnik mashinostroenija» № 12, 1947, 236 s.
9. Osipjan A.V. Jeksperimental'noe issledovanie pittingovyh razrushenij v zubchatyh peredachah. «Trudy NATI», vyp. 43, Mashgiz, 1945, 215 s.
10. Pinegin S.V. Kontaktnaja prochnost' i soprotivlenie kacheniju. M., «Mashinostroenie», 1969, 245 s.
11. Kaplun P. V., Ljashenko B. A. Viznachennja zalishkovih napruzhen' v azotovanih sharah pіslja іonnogo azotuvannja za pokaznikami mіkrotverdostі. Problemi mіcnostі. 2016. № 6. C. 56-63.
12. Tesker E.I. Kontaktnaja prochnost' cementovannyh i nitrocementovannyh zubchatih koles. MiTOM.1988.№2.S.46–50.
13. Bakjengem E. Rukovodstvo po proektirovaniju zubchatih peredach, chasti 2 i 3. Mashgiz, 1948.
14. Moroz L.S., Shurakov S.S. Problema prochnosti cementovannoj stali L. Mintransmash, 1947, .228s.
15. Zalko A.I. Soprotilenie ustalosti vysokonagruzhennyh zubchatyh koles iz razlichnyh stalej. Vestnik mashinostroenija. 1988. №8. S.57–59.
16. Saverin M.M. Kontaktnaja prochnost' metallov. (CNIITMASh, kn.2), Mashgiz, 1946.
17. Kaplun P.V., Gonchar V.A., Parshenko A.V., Sposіb viprobuvan' na kontaktnu vitrivalіst' pri kochennі z prokovzuvannjam, Patent №106181 UA. MPK (2006.01):G01L 1/00 (Opublіkovano 25.04.2016, bjul. №8).
Published
2019-01-14
How to Cite
Каплун, П., Гончар, В., & Паршенко, А. (2019). The influence of termination of the getting on contact extent steel x12 at termination. Problems of Tribology, 90(4), 80-84. Retrieved from http://tribology.khnu.km.ua/index.php/ProbTrib/article/view/694
Section
Articles