| Autor: |
Seval'nev, G. S., Seval'neva, T. G., Kolmakov, A. G., Dul'nev, K. V., Chirkov, I. A., Martynenkova, E. V. |
| Zdroj: |
Russian Metallurgy (Metally); Oct2023, Vol. 2023 Issue 10, p1439-1444, 6p |
| Abstrakt: |
The microstructure, the microhardness of the near-surface layer, and the contact fatigue of austenitic–martensitic VNS9-Sh TRIP steel are studied after tribotechnical tests at loads corresponding to maximum normal stresses σZmax = 2500–4000 MPa. An increase n the stresses in the contact zone from 2500 to 4000 MPa is found to increase the thickness of the near-surface layer with a hardness more 290 HV, which underwent martensitic transformation. As the contact stresses in VNS9-Sh steel decrease from 4000 to 2500 MPa, the contact life of this steel increases by a factor of more than 63, and the surface endurance limit of the quenched VNS9-Sh steel with a hardness of 220 HV is 2300 MPa, which is higher than that of bearing 95Kh18-Sh steel with a hardness of 650 HV by 15%. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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