Sagalovych, A.; Sagalovych, V.; Popov, V.; Dudnik, S.; Olijnyk, O. Tribological Characteristics of Samples Made from Titanium Alloy VT5 Nitrided in Plasma Glow Discharge. Tribology and Materials 2022, 1, 106–113, doi:10.46793/tribomat.2022.013.
Sagalovych, A.; Sagalovych, V.; Popov, V.; Dudnik, S.; Olijnyk, O. Tribological Characteristics of Samples Made from Titanium Alloy VT5 Nitrided in Plasma Glow Discharge. Tribology and Materials 2022, 1, 106–113, doi:10.46793/tribomat.2022.013.
Sagalovych, A.; Sagalovych, V.; Popov, V.; Dudnik, S.; Olijnyk, O. Tribological Characteristics of Samples Made from Titanium Alloy VT5 Nitrided in Plasma Glow Discharge. Tribology and Materials 2022, 1, 106–113, doi:10.46793/tribomat.2022.013.
Sagalovych, A.; Sagalovych, V.; Popov, V.; Dudnik, S.; Olijnyk, O. Tribological Characteristics of Samples Made from Titanium Alloy VT5 Nitrided in Plasma Glow Discharge. Tribology and Materials 2022, 1, 106–113, doi:10.46793/tribomat.2022.013.
Abstract
One of the modern methods of improving operating characteristics of titanium and titanium-based alloys under conditions of friction and increased contact loads is the method of ion-plasma nitriding. The effect of nitriding of VT5 alloy (Al 4,5-6,7 %, V to 1,2 %, Mo to 0,8 % − analogue 3.7115) in the plasma of a glow discharge excited in a hollow cathode on its tribological characteristics in pairs with different materials in T-1 fuel and under dry friction conditions has been studied. For research and tribological tests, samples of VT5 alloy were nitrided in the plasma of a glow discharge excited in a hollow cathode at a temperature of 975 ± 15°C and a pressure of 58 ± 2 PA in a nitrogen-argon gas mixture with a nitrogen content of 78 %. Studies of samples of VT5 alloy after nitriding showed that the surface roughness Ra was in the range of 0.58-0.64, and the surface hardness HV5 was 525 ± 20 kgf/mm² at a base hardness of 325 ± 15 kgf/mm². Tribological tests were performed on a friction machine 2070 SMT-1 according to the scheme "cube - roller". Tests under conditions of friction with oil were performed at a load of 200 N. The sliding speed during the tests was 1.3 m/s, the test time was 75 sec. The test under dry friction conditions was carried out at a load of 100 N and a sliding speed of 0.785 m/s, the test time was 30 minutes. Low wear ability in relation to the nitrided titanium alloy VT5 (<2.4x10-4 mm3/s), as well as friction coefficients at the level of 0.08 to 0.12 in the order of their growth had bronze VB-23NTS (Pd 18–22 %, Ni 3–4 %, Zn 3–4 %, Sb 3–4 %, P 0.15–0.3) r.O10C2N3, VB-24 (Sb 4.7–6, 2 %, P 0.4–0.9), steel 1.3505, cast iron GGG80, cemented steel 20Cr3MoWV.
Chemistry and Materials Science, Surfaces, Coatings and Films
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