Ion implantation as a way to improve the operating durability of fine-size steel tool
DOI:
https://doi.org/10.15587/1729-4061.2013.18437Keywords:
ion implantation, titanium, chromium, modified coating, microhardness, wear resistance, operating durabilityAbstract
The work is devoted to the improving the operating durability of a fine-size tool. The application of such tool has economic gains for the producer as leads to the decrease of bought tool expenses. Modified coatings of titanium nitride and chromium on the bases of structural steel and structural alloyed steel have been produced by the ion implantation method. The structure and physical properties of these coatings, as well as their use as protective coatings on the fine-size tool have been studied in this article. Due to the correctly chosen regimes (U discharge = 400 ÷ 430 V, I discharge = 0,5 ÷ 0,35 A, U target = 2 ÷ 1,2 kV, I target = 50 ÷ 60 mA, U base = 25 kV, I base = 35 mA, рgas = 3,32·10-2 Pа), a doze of implanted ions (2,0×1016 – 8,03×1017 ion/cm2), materials of the target(Ti and Cr) and the base (ВСт3сп and 40Cr) and as a result of carrying out experimental researches high quality protective coatings have been produced, microhardness increasing 2,5 times and wear resistance increasing 2,5 times. When using the results of work in practice wear resistance of working surfaces of the fine-size tool has been increased 3 - 6 times. The use of ion-plasma processing enables to get steel with modified protective coatings and to increase the operating durability of the fine-size steel tool and small but having key importance machine parts.
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