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研究了常规冷却工艺和轧后控冷工艺对抗震钢筋强度、强屈比和断后伸长率的影响,并分析了轧后控冷工艺下钢筋的显微组织。结果表明,在强屈比、断后伸长率都满足抗震钢筋使用要求的前提下,通过控制冷却工艺得到的钢筋的性能更加稳定,且抗拉强度和屈服强度较常规工艺更大;通过控制冷却工艺得到的抗震钢筋的横截面心部组织为铁素体+珠光体,边部为索氏体。
The effects of conventional cooling process and controlled cooling after rolling on the strength, flexural modulus and elongation at break of the earthquake-resistant steel bars were studied. The microstructure of the steel bars after controlled cooling was analyzed. The results show that under the precondition that the strength ratio and the elongation after break meet the requirements of anti-seismic reinforcement, the performance of the steel obtained by controlling the cooling process is more stable and the tensile strength and yield strength are larger than the conventional ones. By controlling the cooling The cross-sectional core of the earthquake-resistant reinforcing steel obtained by the process is characterized by ferrite + pearlite and sorbite at the edge.