Details

Autor(en) / Beteiligte

• Seval’nev, G. S.
• Seval’neva, T. G.
• Kolmakov, A. G.
• Dul’nev, K. V.
• Chirkov, I. A.
• Martynenkova, E. V.

Titel

Evolution of the Microstructure, Hardness, and Contact Life of Austenitic–Martensitic VNS9-Sh TRIP Steel during Contact-Fatigue Loading

Ist Teil von

• Russian metallurgy Metally, 2023-10, Vol.2023 (10), p.1439-1444

Ort / Verlag

Moscow: Pleiades Publishing

Erscheinungsjahr

2023

Link zum Volltext

Quelle

SpringerLink

Beschreibungen/Notizen

• 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 σ Z max = 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%.