Conclusions
-
1.
PTMST and HTMST can be used as the final surface treatment when a roughness of Ra 0.32-1.25 is required.
-
2.
The best combination of mechanical properties and roughness for steel 40Kh was obtained after the following conditions of HTMST: burnishing rate 0.15 mm/rev, burnishing force 100 kgf, deformation temperature 950°, postdeformation holding time 6 sec, final tempering at 200°. After this treatment the wear resistance of steel 40Kh is 1.4 times higher than after induction hardening.
-
3.
After PTMST under optimal conditions (burnishing rate 0.15 mm/rev, burnishing force 300 kgf, intermediate tempering at 200°, quenching from 950°, final tempering at 200°) the wear resistance of steel 40Kh is 1.3 times higher than after induction hardening.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
Literature cited
I. A. Birger, Residual Stresses [in Russian], Mashgiz, Moscow (1963).
M. L. Bernshtein, Strength of Steel [in Russian], Metallurgiya, Moscow (1974), p. 109.
M. L. Bernshtein, I. I. Sumina, and V. N. Demidov, "Wear resistance of Steel 50G after preliminary thermomechanical treatment", Vestn. Mashinostr., No. 10, 77 (1976).
Additional information
Moscow Institute of Steel and Alloys, Karavaevo Kostroma Agriculatural Institute. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 4, pp. 6–10, April, 1979
Rights and permissions
About this article
Cite this article
Bernshtein, M.L., Sumina, I.I. & Demidov, V.N. Thermomechanical treatment of steel 40Kh and improvement of surface quality. Met Sci Heat Treat 21, 249–253 (1979). https://doi.org/10.1007/BF00775100
Issue Date:
DOI: https://doi.org/10.1007/BF00775100