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

Abstract

The probability of formation of new phases on triboconjugated metal surfaces of the contact zone at physicochemical interactions of lubricating and cooling technological products (LCTPs) 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 45 steel and VT1-0 titanium alloy, formed during cutting with the use of air and its separate components (oxygen and nitrogen), including those activated by corona discharge, as LCTPs, at the pressure of external media of 10^–1 mm Hg have been carried out. The best surface quality of 45 steel was recorded at activation of SDS by negative potential on the corona electrode. For VT1‑0 titanium alloy the best surface quality was recorded during activation of LCTPs by positive potential on the corona electrode. 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 LCTPs. It has been suggested that LCTPs containing organic compounds can be used in the treatment of both iron and titanium, as well as their alloys.