本文介绍了中强钢丝的机械性能、应力松弛及拔丝工艺的试验结果。同时,对中强钢丝预应力构件的应力传递和粘结锚固性能以及受弯构件最小配筋率等进行了试验研究。中强钢丝标准强度为800MPa,极限延伸率(δ_100)为4.0％,松弛损失(1000小时、20±1℃)不超过7％与冷拔低碳钢丝相比,这种钢丝强度较高、延性好,能显著地改善构件的结构性能,可节省预应力钢丝15％左右。 This article describes the mechanical properties, stress relaxation, and wire drawing process test results for medium-strength steel wires. At the same time, the stress transmission and adhesive anchoring performance of the prestressed members in the medium-strong steel wire and the minimum reinforcement ratio of the flexural members were tested. The standard strength of medium-strength steel wire is 800MPa, ultimate elongation (δ_100) is 4.0%, relaxation loss (1000 hours, 20±1°C) does not exceed 7%. Compared with cold-drawn low-carbon steel wire, this steel wire has higher strength and ductility. Well, it can significantly improve the structural performance of components, saving about 15% of prestressed steel wire.