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基于DEFORM-3D有限元平台建立了TA15钛合金大型复杂整体构件预锻成形过程的有限元模型,研究了成形参数对预锻成形过程中变形体组织演化和等轴α相晶粒尺寸的影响规律。结果表明:随着变形的进行,等轴α相晶粒发生细化;在950～980℃范围内变形时,随着变形温度的升高,初生α相晶粒尺寸逐渐增大,在980℃条件下变形时,预锻件整体范围内晶粒尺寸波动较大;随着变形速率的增加,初生α相晶粒尺寸减小;在0.5和1.0mm/s条件下成形时,温度对晶粒尺寸影响比较小,而在0.1mm/s条件下变形时,随着温度的升高,晶粒长大比较严重;随摩擦因子的增大,平均晶粒尺寸有所减小,整个锻件晶粒尺寸分布的不均匀性增加。
Based on DEFORM-3D finite element platform, the finite element model of the TA15 titanium alloy large-scale complex monolithic component pre-forging process was established. The influence of forming parameters on the microstructure evolution and the equiaxed α-phase grain size during the preforming process was studied . The results show that as the deformation proceeds, the α-phase grains are refined. When the deformation temperature is in the range of 950-980 ℃, the size of primary α-phase grains increases with the increase of the deformation temperature, Under the conditions of deformation, preform forging the whole range of grain size fluctuations; with the deformation rate increases, the primary α-phase grain size decreases; at 0.5 and 1.0mm / s conditions, the temperature on the grain size The influence is relatively small, while the deformation under the condition of 0.1mm / s, with the temperature increases, the grain growth is more serious; with the friction factor increases, the average grain size decreases, the entire grain size forgings Distribution of non-uniformity increases.