Analysis on temperature field in plasma nitriding of titanium alloy cylindrical workpiece based on Ansys simulation

doi:10.13251/j.issn.0254-6051.2023.06.043

Abstract

Abstract: To solve the problem that the temperature distribution of cylindrical workpiece cannot be obtained in real-time in the process of titanium alloy ion nitriding, the temperature field of the titanium alloy cylindrical workpiece of different sizes under various conditions was simulated through the steady temperature field numerical simulation based on Ansys software, and a series of temperature field distribution characteristics of cylindrical workpiece were obtained. The results show that in the nitriding mode completely relying on plasma bombardment without auxiliary heating, the maximum temperature range of the titanium alloy single cylinder workpiece can reach 7.8 ℃, the temperature field is symmetrical, and the temperature is high in the center and low at both ends at axial direction. After the auxiliary heating at both ends is added, the maximum temperature range of the same cylindrical workpiece is reduced to 5.6 ℃, the temperature at both ends is significantly increased, and the uniformity of temperature field is improved, but such uniformity becomes worse with the increase of cylinder wall thickness. The axial temperature uniformity of the cylinder can be improved by adjusting the auxiliary power. In the radial direction, the temperature of the inner wall of the cylinder is higher than that of the outer wall, and the temperature difference between the inner and outer walls increases with the increase of wall thickness. The numerical simulation results can provide a reference for the optimization of ion nitriding process of titanium alloy cylindrical workpiece.

Key words: titanium alloy, plasma nitriding, temperature field, heat treatment, Ansys simulation

CLC Number:

TG156.8⁺2

Han Xiao, He Ruijun, Zhu Shuo, Wang Yun, Feng Runhua, Kong Lingli. Analysis on temperature field in plasma nitriding of titanium alloy cylindrical workpiece based on Ansys simulation[J]. Heat Treatment of Metals, 2023, 48(6): 258-264.

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