Memory alloy anti-loosening bolt assembly and anti-loosening method

The invention provides a memory alloy anti-loosening bolt assembly and an anti-loosening method. The memory alloy anti-loosening bolt assembly comprises a bolt, a memory alloy sleeve, a nut and a nutlocking sleeve, wherein the memory alloy sleeve, the nut and the nut locking sleeve sequentially arranged on the bolt in a sleeved mode, and the nut and the nut locking sleeve are fixedly connected. During mounting, the anti-loosening bolt assembly penetrates through a hole of a connected piece, the nut is mounted and pre-tightened, and the memory alloy sleeve is heated until the memory alloy sleeve completes phase change; and the nut locking sleeve is arranged on the outer side of the nut in a sleeved mode, and the whole locking sleeve is heated, so that deformation is completely recovered, and the anti-loosening performance is guaranteed. 本发明提供一种记忆合金防松螺栓组件及防松方法，包括螺栓、记忆合金套、螺母与螺母锁紧套，所述记忆合金套、所述螺母以及所述螺母锁紧套依次套设于所述螺栓上，所述螺母与所述螺母锁紧套固定连接在安装时，将防松螺栓组件穿过被连接件的孔内，安装并预紧螺母，加热记忆合金套至记忆合金套完成相变，在螺母外侧套装螺母锁紧套，并加热锁紧套整体，使其完全恢复形变，保证其防松性