采用单辊甩带法制备高温形状记忆合金薄带,研究其显微组织和马氏体相变。结果表明,薄带晶粒相比块体合金得到细化,尺寸为2~18μm,且晶粒生长方向基本一致。室温条件下,消除内应力后,薄带由孪晶亚结构的马氏体变体组成。热处理初期,薄带的相变温度降低,后期相变温度变化不大。 High-temperature shape memory alloy ribbons were prepared by single-roll rejection method and their microstructures and martensitic transformations were studied. The results show that compared with the bulk alloy, the thin ribbon grains are refined with the size of 2 ~ 18μm and the grain growth direction is basically the same. After eliminating the internal stress, the ribbons consist of martensite variants with twinned substructures at room temperature. In the early stage of heat treatment, the phase transformation temperature of the ribbon decreases, and the phase transition temperature does not change much at the later stage.