Tribological properties of TC4 titanium alloy treated by plasma nitriding at different temperatures

• Published in: Cai liao gong cheng = Journal of materials engineering Vol. 48; no. 2; pp. 156 - 162
• Main Authors: Yuan, Yun-gang, Kang, Jia-jie, Yue, Wen, Fu, Zhi-qiang, Zhu, Li-na, She, Ding-shun, Wang, Cheng-biao
• Format: Journal Article
• Language: Chinese
• Published: Beijing Beijing Institute of Aeronautical Materials 01.02.2020; Journal of Materials Engineering
• Subjects: Bearing strength; Ion nitriding; Load carrying capacity; Low temperature; Microhardness; microstructure; Morphology; Nitrides; Optical microscopes; Plasma; plasma nitriding; Solid phases; Substrates; Surface roughness; tc4 titanium alloy; Titanium alloys; Titanium base alloys; tribological property; Tribology; Wear resistance; White light
• ISSN: 1001-4381; 1001-4381
• DOI: 10.11868/j.issn.1001-4381.2018.000367

The wear resistance of TC4 titanium alloy was improved by plasma nitriding and the optimum nitriding temperature was investigated. TC4 titanium alloy was nitrided at 650, 700, 750, 800, 850℃ and 900℃ with LDM1-100 plasma nitriding equipment respectively,the temperature holding time is 10 h for each nitriding treatment. The microstructure, surface morphology, surface roughness, phase structure and hardness of nitrided samples at different temperatures were characterized by optical microscope, scanning electron microscope, white light three-dimensional topography instrument and microhardness tester. The tribological properties of TC4 titanium alloy after plasma nitriding were tested by CETR UMT-3 multifunctional friction and wear tester. The results show that the surface microhardness and roughness of TC4 titanium alloy increase with the increase of temperature. After nitriding at 900℃, the surface microhardness of TC4 titanium alloy reaches 1318HV0.05, which is about 4 times as high as that of the substrate (3