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以电子束熔炼的纯钽锭为原料 ,研究了冷压开坯然后进行轧制的工艺 ,以及加工变形量、退火工艺对钽板的组织与性能的影响。结果表明 :因冷压时只在一个方向施力 ,金属沿铸锭中柱状长度方向流动 ,使柱状晶沿变形方向拉长 ,晶粒细化效果不太明显 ;变形量越大 ,则再结晶温度越低 ,晶粒尺寸越小 ;轧制变形量越大 ,则抗拉强度越高 ,延伸率越低 ,而再结晶退火后的硬度均无多大差别 ;钽板各向异性明显 ,在 45°方向上强度小而延伸率却明显增大。这种各向异性使钽板在深冲过程中制耳现象严重 ,金属损失大。
The pure tantalum ingot produced by electron beam melting was used as raw material to study the effect of cold pressing and then rolling, as well as the effect of processing deformation and annealing process on the microstructure and properties of tantalum plate. The results show that when the metal is applied in one direction only due to cold pressing, the metal flows along the longitudinal direction of the ingot to elongate the columnar grains along the deformation direction, and the effect of grain refinement is not obvious. The larger the amount of deformation, the more recrystallized The lower the temperature, the smaller the grain size; the larger the amount of rolling deformation, the higher the tensile strength, the lower the elongation, and the hardness after recrystallization annealing are not much different; tantalum plate anisotropy significantly, at 45 Degree of strength in the direction of small but significantly increased elongation. This anisotropy of the tantalum plate in the process of making ear ear serious, large metal loss.