采用力学性能测试、宏观观察、扫描电镜及能谱分析等方法研究了自然时效对PSB830高强度精轧螺纹钢筋力学性能的影响。结果表明：自然时效后，钢筋的屈服强度先下降后提高到初始结果附近，抗拉强度先升高后趋于稳定，断后伸长率有大幅度的提高；自然时效前，断后伸长率较低的原因是氢在夹杂物附近聚集；时效过程中，在内应力释放、析出相以及氢缓慢释放的综合作用下，氢的聚集程度降低，使得钢筋的断后伸长率有较大幅度的提升。

The effects of natural aging on the mechanical properties of PSB830 high strength finish-rolled reinforced bars were studied by means of mechanical property testing, macroscopic observation, scanning electron microscopy and energy spectrum analysis. The results show that after natural aging, the yield strength of the reinforced bars first decreased and then increased to near the initial results, while the tensile strength first increased and then tended to stabilize. The elongation after fracture had a significant increase. The reason for the low elongation after fracture was that the hydrogen accumulated near the inclusion. During the aging process, under the combined effect of internal stress release, precipitation phase and slow release of hydrogen, the aggregation degree of hydrogen decreased, resulting in a significant increase in the elongation after fracture of the steel bar.