用共振法测得高强度预应力钢丝在２９０℃有一个内耗峰，钢丝稳定化处理时的微观结构变化与内耗峰的形成有重要联系，低松弛预应力钢丝稳定化处理机理是一个能够最大限度地使可动位错沿应力应变方向重新组态并为溶质原子钉扎的形成过程。 There is an internal friction peak at 290°C for high-strength prestressed steel wire measured by resonance method. The microstructure change during the steel wire stabilization treatment is closely related to the formation of internal friction peak. The mechanism of the stabilization of low-relaxation prestressed steel wire is a maximum The movable dislocations are reconfigured along the stress-strain direction and are the process of pinning solute atoms.