Use of Detonation Sputtering to Increase the Durability of Hydraulic Hammer Critical Parts

Hlushkova, Diana; Kyrychenko, I.H.; Bahrov, V.A.; Kalinina, Nataliya; Nosova, T.V.

doi:10.46813/2021-135-139

Cited by 3 publications

(1 citation statement)

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“…For this purpose, various methods are used. For instance, such methods include detonation sputtering [3]; reinforcement of layers of steam turbine blades [4]; obtaining gas-plasma coatings [5,6]; laser treatment [7]; modes of thermal treatment for the purpose of getting the required level of mechanical properties of details [8,9]; nanomodification treatment [10], etc.…”

Section: Introductionmentioning

confidence: 99%

STUDY OF WEAR OF THE BUILDING-UP ZONE OF MARTENSITE-AUSTENITIC AND SECONDARY HARDENING STEELS OF THE Cr-Mn-Ti SYSTEM

Hlushkova¹,

Bagrov²,

Saenko³

et al. 2023

Problems of Atomic Science and Technology

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The work deals with wear of the building-up zone of martensite-austenitic and secondary hardening steels of the Cr-Mn-Ti system (partially alloyed with Mo, B, and V). Additional alloying of the studied steels with titanium in the amount of 2…5% supported avoiding cleavages along the building-up zone. It was determined that there is a 7…15 µm wide parent metal zone next to the weld line. The influence of temperature on the weld toughness of the building-up zone was assessed according to the criterion of Malkin and Tetelman. The microhardness of the surface layers of built-up layers and the range of its dispersion are close to the results of laboratory tests, where ТСт ~ 823 K. This approves the formation of structure of metal of contact volumes with the collective effect of heating, plastic deformation and diffusion. It was experimentally approved that the change of microhardness in the sub-surface layers at the wear stage is justified simultaneously with the processes of mutual diffusion of friction pair materials, selective oxidation and thermodiffusion redistribution of the hardening phase under the influence of temperatures and deformations. The diffusion coefficient in the deformed sub-surface layer, which is up to some dozen micrometers thick, is one of the values providing the kinetics of growing of nuclear cracks and development of destruction cracks. The received results provide an opportunity to use martensite-austenitic and secondary hardening steels of the Cr-Mn-Ti system with built-up surface for the hot forming tools.

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