In this study, the effects of plasma nitriding surface treatment on the structural, tribological and thermal properties of Ti45Nb Beta alloy were investigated experimentally. Plasma nitriding process of Ti45Nb alloy was performed in 25% Ar-75% N2 gas mixture, for treatment times of 1–4 hours at the temperatures of 700–750 °C. The tribological tests of the plasma nitrided alloy were performed in dry sliding conditions. Thermal property measurements were applied to the plasma nitrided samples to determine their thermal conductivity and specific heat capacity. The TiNbN₂ phase was observed in the compound layer formed after the nitriding process, and the compound layer and diffusion layer thicknesses increased depending on the nitriding temperature and duration. The highest microhardness was obtained for the sample nitrided at 750 °C for 4 hours and the hardness approximately twice increased compared to the untreated alloy. Due to its high surface hardness and nitride layer with sufficient thickness, the lowest wear rate was obtained for the nitrided sample under these conditions. As a result, the most effective parameter on the wear properties of Ti45Nb alloy after nitriding was determined as the process temperature. After the plasma nitriding process, thermal conductivity, thermal diffusion and specific heat capacity values decreased due to the formation of a nitride layer on the surface with a relatively lower thermal conductivity compared to the untreated alloy.

在这项研究中，实验研究了等离子体氮化表面处理对Ti45Nb Beta合金的结构，摩擦学和热学性能的影响。Ti45Nb合金的等离子渗氮工艺是在25％Ar-75％N2气体混合物中进行的，在700–750°C的温度下处理时间为1-4小时。等离子氮化合金的摩擦学测试在干式滑动条件下进行。对等离子体氮化的样品进行热性能测量，以确定其热导率和比热容。TiNbN ₂在渗氮处理后形成的化合物层中观察到相，并且渗氮层和扩散层的厚度根据渗氮温度和持续时间而增加。对于在750°C下氮化4小时的样品，其显微硬度最高，与未处理的合金相比，硬度大约提高了两倍。由于其高表面硬度和具有足够厚度的氮化物层，在这些条件下，氮化样品的磨损率最低。结果，将氮化后的Ti45Nb合金的磨损性能的最有效参数确定为工艺温度。经过等离子体氮化处理后，导热系数