INCREASING OPERATING DURABILITY OF FINE-SIZE TOOL BY THE METHOD OF LOW-TEMPERATURE ION IMPLANTATION.

The paper deals with increasing the operating durability of a fine-size tool. Applying this tool has economic benefits for producers since it leads to lower costs of the tool purchased. Using the method of low-temperature implantation, modified coatings of titanium and chromium nitride on tool steel substrates were obtained. Structure and physicomechanical properties of these coatings and their use as protective coatings on fine-size tools were investigated in the paper. Due to properly selected modes (U discharge=400 V, I discharge=0.5 a, U target=2 Q, I target=50 mA, U substrate=25 kV, 35 mA=I substrate, r gas=3.32-10-2 Pa) introduced ion dose (5.73-1016--6.73-1017 ion/cm²), materials of the target (Ti and Cr) and substrate (R18 and HVG) as a result of experimental researches, high-quality protective coatings were produced, microhardness increased by 2.2-2.5 times. Practical use of research results has revealed an increase in operating durability of fine-size steel tool by 1.5-2 times. Applying ion-plasma treatment allows to produce steels with modified protective coatings and increase the operating durability of fine-size steel tools and small, but those that are key machine parts. [ABSTRACT FROM AUTHOR]