Complex bulk-surface hardening of materials using a highly concentrated heat source View Full Text


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Article Info

DATE

1988-05

AUTHORS

L. K. Leshchinskii, S. S. Samotugin, I. I. Pirch, A. V. Puiko, N. Kh. Solyanik

ABSTRACT

ConclusionsThe complex bulk-surface hardening of the steels investigated using a highly concentrated heat source is an effective means of regulating their structure and crack resistance.The heat resistance of steels hardened by a highly concentrated heat source can be increased by the use of preliminary bulk quenching (as a result of the formation of a natural soft interlayer — tempered zone) and/or subsequent bulk tempering (as a result of relaxation of internal structural microstresses).Surface hardening by a highly concentrated heat source is an effective means of improving the crack resistance of components that operate in the bulk-quenched state; this is explained by a significant increase in the dispersity of the martensitic structure, and, as a result, by a qualitative change in the failure micromechanism.The highest values of the crack-resistance characteristics of the steels investigated were obtained for the following combinations of heat treatment: bulk quenching+plasma hardening+tempering at 300°C for steels 30KhGSA and 45; and initial state+plasma hardening+tempering at 300°C for steels 9KhF and 150KhNM. More... »

PAGES

317-325

References to SciGraph publications

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/bf00701037

DOI

http://dx.doi.org/10.1007/bf00701037

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1016783026


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