Page 10 - Dycert_Havryluk

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the edge corners of wetting. The wetting of 38KhN3МFА steel surface by LCL

solutions is maximum in the case of LCLs. It beter penetrates into the "tool-detail"

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contact zone. The LCLs adhesion Wa is about 63,6 ∙ 10 N/m what is less than 1.7 times
in comparison with water (110,4·10 N/m). The high wettability and adsorption
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increase the hydrophilic of metal surface, reduce the surface energy that facilitates the

metal machining.

Thermo stability of LCLs is higher than oil-based LCL (LCLo): during

thermooxidation destruction it is loses mass (weight) less intensive. The 50% LCLs

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mass loss occurs at 400 С, LCLr at 380 С, and LCLo at 340 С. The main exothermic
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effect of combustion of products of LCLs destruction is shifted to higher temperature
region in comparison with LCLo, which improves operation characteristics.

The surface state estimated by scanning electron microscope EVO-40XVP

indicates the about the positive effect of LCLs and LCLr on the process of

38KhN3МFА steel samples processing after sharpening in LCL. The spectrum

character and the quantitative composition of the shavings revealed Oxygen and
Nitrogen atoms on the steel surface what indicates on the coordination bond of valence

electrons with the metal adsorption centers. As a result a nanofilm is formed the outer
side of which forms the LCL organic strands.

The thermal destruction of LCL concentrates in the contact zone “component-tool”
and “shaving-tool” is modeled. It was shown that the LCLs sample shows a higher

thermal destruction resistance than the LCLo sample: the mass loss of 50% has
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observed for LCLs - at 400 C, LCLr - at 380 C, and LCLo- at 340 C.
The results of tribological investigations and the efficiency of developed LCL

influence on processes of friction, cutting (drilling, turning) are presented. The lubricity

of the new LCL and LCLo was estimated on R6M5-12Kh18АG18Sh steels friction pair

by the friction coefficient between the tool and the processed metal. The friction

coefficient was determined under load Po using the measurements indicators of friction

moment, which were recorded by an inductive sensor of the SMT-1 machine and fixed

by mechanical recording. The friction coefficient (under load 300 N) reduces by a factor

of 2 in the presence of developed LCL as compared with LCLo. The uniform character