Processes of Formation of New Structures in the Contact Zone during Blade Cutting of Iron and Titanium Alloys with Instrumental Materials: Thermodynamic Approach

The probability of formation of new phases on tribo-conjugated metal surfaces of the contact zone at physicochemical interactions of lubricating and cooling technological products (LCTP) or their components with juvenile metal surfaces of iron and titanium when cutting tools are used has been substantiated. Studies of changes in the appearance of surfaces of steel 45 and titanium alloy BT1-0, formed during cutting with the use of air and its separate components (oxygen and nitrogen), including those activated by corona discharge, as LCTP, at the pressure of external media 10–1 mm Hg have been carried out. The best surface quality of steel 45 was recorded at activation of SDS by negative potential on the corona electrode. For titanium alloy VT1-0 the best surface quality was recorded at activation of LCTP by positive potential on the corona elec-trode. It has been established that titanium, having a higher chemical affinity to oxygen, has a higher chemical affinity to free-radical fragments of oxygen-containing organic LCTP. It has been suggested that the CRMs containing organic compounds can be used in the treatment of both iron and titanium, as well as their alloys.

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