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本文研究了AlloyC+阻燃钛合金棒材在单重固溶、固溶+时效和高温固溶+低温固溶+时效等不同热处理状态下及高温长时热暴露后的显微组织。研究结果表明:AlloyC+钛合金轧制棒材原始显微组织为典型的等轴β晶粒,晶内有明显的第二相析出和孪晶生成;单重固溶时,固溶温度低时晶粒尺寸略小,固溶温度高时晶内析出相比例更高;双重和多重热处理并经长时热暴露后,由于α相有优先在晶界形核的趋势,因此在晶界的析出相增多,并在晶界形成了连续的粗化α相,从而破坏了晶界的连续性。
In this paper, the microstructures of AlloyC + flame-retardant titanium alloy rods after heat treatment under single heat treatment, solution treatment + aging, high temperature solution treatment + low temperature solution treatment + aging and other long-term heat treatments were studied. The results show that the original microstructure of AlloyC + titanium alloy rolling bar is a typical equiaxed β-grain with obvious second phase precipitation and twins formation. When single solution solid solution temperature is low, When the solid solution temperature is high, the proportion of precipitated phase in the crystal is higher. After the double and multi-heat treatment and prolonged exposure to heat, the α phase has the tendency of nucleation preferentially in the grain boundary. Therefore, Increase, and in the grain boundary formed a continuous coarsening α phase, thus undermining the continuity of grain boundaries.