利用自制XMH-160型线性摩擦焊机进行TC6钛合金线性摩擦焊接实验.观察并分析接头焊缝区、热力影响区、飞边的组织特征及其形成过程;对焊后接头进行了拉伸性能和显微硬度测试.结果表明:TC6钛合金线性摩擦焊接头的拉伸强度不低于母材,显微硬度与接头不同区域组织特征相对应;焊缝区回复与再结晶过程进行比较充分,主要由快速热循环和大变形过程中形成亚稳态β相及钛马氏体、二次α相组成,且保留了少量变形原始α组织;热力影响区仅在靠近焊缝区发生了部分再结晶,α,β两相在变形过程中相互交替呈带状分布,形成典型的流线组织.
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