利用光学显微镜(OM), DSC和XRD, 研究了直径19 mm Ni47Ti44Nb9热轧棒材再结晶对相变和织构的影响, 为该合金棒的实际应用提供理论依据.结果表明: 热轧棒从450 ℃开始发生明显再结晶;从850 ℃/90 min真空退火棒材的中心到边缘, 再结晶晶粒尺寸减小, Ms降低, 马氏体转变区间变窄, 热滞增大; 热轧棒中形成了较强的γ丝织构, 600 ℃/90 min退火后, γ丝织构强度稍有下降, 退火温度升到850 ℃, 丝织构明显减弱, 等密度线发生漫散, 形成了新的织构组分, 这有利于改善棒材径向方向的恢复应变.
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