针对PC钢筋在张拉状态下的蒸养过程中镦头掉头较为严重的现象 ,采用 43Si材料 ,对不同热处理制度的试样进行抗延迟断裂能力的试验 ,研究不同热处理制度对PC钢筋延迟断裂性能的影响规律。分析实验结果和相关理论 ,通过对热处理制度的优化 ,显著提高了PC钢筋的综合使用性能 ,使PC钢筋断头率小于 3%,优于同规格其它PC制品。 Aiming at the serious phenomenon of the head-up head turning over during the steamed-up process of the PC steel bars under tension, 43Si materials were used to test the anti-delayed fracture ability of the samples with different heat treatment systems. The effects of different heat treatment systems on the delayed fracture properties The law of influence. By analyzing the experimental results and related theories, the optimization of the heat treatment system can significantly improve the comprehensive performance of PC steel bars, and the breakage rate of PC steel bars is less than 3%, which is better than other PC products of the same specifications.