铌微合金化HRB400E钢筋无屈服平台原因及解决措施探究

REASONS AND SOLUTIONS FOR NON-YIELDING PLATFORM OF NB MICROALLOYED HRB400E BARS

针对铌微合金化HRB400E钢筋无屈服平台现象,从化学成分、金相组织等方面着手分析,得出无屈服平台的主要原因是贝氏体含量偏高。通过控制钢筋在冷床上的冷却速度,改善钢筋的金相组织,解决铌微合金化钢筋无屈服平台问题。

In view of the non-yielding platform problem of Nb microalloyed HRB400E bars,the chemical composition and microstructure were analyzed.It is concluded that the main reason for the non-yielding platform is the high bainite content in microstructure.By controlling the cooling rate of the bars on the cooling bed,the microstructure of the bars was improved,and the problem of non-yielding platform of Nb microalloyed bars was solved.