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使用真空自耗炉制备出多种微量TiB和TiC增强的Ti-5Al-5Mo-5V-1Fe-1Cr钛基复合材料,增强体在热处理过程中可大幅细化β相,但是细化幅度却随着增强体含量的增加而变缓,文中揭示出这和增强体的Zener拖曳力变化有关,增强体含量增加而拖曳力增幅变缓。此外还研究了增强体对α相球化的作用,α球化率随着增强体含量增加而小幅波动,然而在其作用下,等温压缩过程中魏氏体群结构中的板条状α明显加快了球化。等温压缩过程中,增强体对α球化的作用不同于热处理过程,除了显著加速扩散之外,微量增强体还可以通过促进界面转变而加速α相球化。
A series of Ti-5Al-5Mo-5V-1Fe-1Cr Ti-based composites with a small amount of TiB and TiC reinforcements were prepared by vacuum consumable furnace. The reinforcements could greatly refine the β phase during the heat treatment. However, The enhancement of the content of the body increased and slowed down, the text reveals that the enhancer body Zener drag force changes related to the increase in body content and drag force increases slowed. In addition, the effect of enhancers on α-phase spheroidization was also studied. Α spheroidization rate fluctuated slightly with the increase of enhancer contents. However, in its isothermal compression process, Speed up the ball. During isothermal compression, the effect of reinforcement on α spheroidization is different from that of heat treatment. In addition to accelerating diffusion significantly, trace reinforcements can accelerate α-phase spheroidization by promoting interfacial transformation.