1 引言 φ36圆钢筋是采用牌号为Q235A的普通碳素结构钢轧制而成。该牌号钢具有良好的热加工性能和焊接性能,且其韧性和塑性也很好。作为八钢的常规产品之一,其物理性能一直都很稳定,但此次热带车间轧制的批号为9904—2376的φ36圆钢在做力学性能时却出现了异常:屈服点偏低。为此,我们对该批试样进行了较详细的分析了。 1 Introduction φ36 round bar is made of ordinary carbon structural steel Q235A rolling. The grade steel has good hot workability and weldability, and its toughness and plasticity are also good. As one of the conventional products of Bayi Steel, its physical properties have been very stable. However, the φ36 round steel with the batch number of 9904-2376 rolled in the tropical workshop was abnormal in its mechanical properties: the yield point was too low. To this end, we conducted a more detailed analysis of the batch of samples.