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通过对昆钢试验生产的HRB400细晶粒热轧带肋钢筋的自然时效和人工时效性能试验分析,得出昆钢生产的HRB400细晶粒钢筋时效后力学性能呈一定的规律性变化,主要表现为钢筋时效后屈服强度有一定下降,抗拉强度的变化不明显,伸长率平均升高了3个百分点,时效不影响钢筋的使用,并且自然时效后,钢筋的综合性能得到了提高。
Through the natural aging test and artificial aging test of HRB400 fine grain hot-rolled ribbed steel produced by the test of Kunming Iron and Steel Co., Ltd., it is found that the mechanical properties of the HRB400 fine grain steel produced by Kunming Iron and Steel Co., Ltd. changes regularly after aging, After the aging, the yield strength of the steel has a certain decline, the tensile strength of the change is not obvious, the average elongation increased by 3 percentage points, aging does not affect the use of steel, and natural aging, the comprehensive performance of the steel has been improved.