钛微合金化螺纹钢筋的生产试验

PRODUCTION EXPERIMENT OF TITANIUM MICROALLOYED THREADED STEEL BARS

介绍了钛微合金化螺纹钢筋的生产工艺,以及不同的钛含量对螺纹钢组织性能的影响。试验表明:随着钛含量的增加,螺纹钢筋的强度得到显著提高,但是钛含量过高时,拉伸曲线会出现无屈服平台的现象,其原因是钛的加入降低了贝氏体临界转变速度,发生贝氏体转变,组织中的贝氏体比例较高,导致拉伸曲线无屈服平台。

This article introduces the production process of titanium microalloyed threaded steel bars and the influence of different titanium contents on the microstructure and properties of threaded steel bars.The experiment shows that with the increase of titanium content,the strength of threaded steel bars is significantly improved.However,with the increase of titanium content,there is a phenomenon of no yield platform in the tensile curve.The reason is that the addition of titanium reduces the critical transformation rate of bainite,resulting in bainite transformation.The proportion of bainite in the structure is relatively high,leading to no yield plateau in the tensile curve.