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采用连续点式锻压激光快速成形技术制备了TA15合金厚壁件,研究了不同退火温度对连续点式锻压激光快速成形TA15合金的显微组织以及室温拉伸力学性能的影响。分析了连续点式锻压塑性变形区大小及所制备TA15合金显微组织的形成机理,解释了退火过程中TA15合金层片组织转变为等轴组织的原因。实验结果表明,随着退火温度的升高,TA15合金退火组织等轴α晶粒体积分数越高,且晶粒尺寸越大,同时退火TA15合金强度降低、塑性升高。
TA15 alloy thick-walled parts were prepared by continuous point forging laser rapid prototyping technology and the effect of different annealing temperature on the microstructure and tensile properties at room temperature of TA15 alloy was studied. The size of continuous plastic deformation zone and the formation mechanism of TA15 alloy were analyzed. The reasons for the transformation of TA15 alloy into equiaxed structure during annealing were explained. The experimental results show that the higher the annealing temperature, the higher the volume fraction of equiaxed α grains in the annealed TA15 alloy and the larger the grain size, the lower the strength and the higher the plasticity of the annealed TA15 alloy.