Ti微合金化技术在热轧带肋钢筋中的应用

Application of Ti microalloying technology in hot rolled ribbed steel bars

无锡新三洲特钢有限公司通过实施钛微合金化生产工艺,代替了原有的成本较高的Nb+Ti复合微合金化工艺,充分发挥了Ti的沉淀、析出强化作用。经过Ti微合金化工艺生产的HRB400E热轧带肋钢筋具有良好的微观组织形态,晶粒度达到了11级以上,钢筋力学性能稳定.对于Φ18 mm HRB400E钢筋,Ti微合金化成品屈服强度与Nb+Ti微合金化成品相差不多,抗拉强度明显优于Nb+Ti微合金化成品.Φ18 mm HRB400E钢筋平均屈服强度达到438.5 MPa,平均抗拉强度为613.6 MPa;Φ25 mm HRB400E钢筋平均屈服强度达到455.0 MPa,平均抗拉强度为625.0 MPa.

Wuxi Xinsanzhou Special Steel Co.,Ltd.replaced the original Nb-Ti microalloying process of higher cost with Ti microalloying process,fully using its precipitation strengthening effect.The HRB400E hot-rolled ribbed bar with Ti microalloying process has good microstructural morphology,small grain size of 11 grades,and stable mechanical properties.ForΦ18 mm HRB400E steel bar,the yield strength of Ti microalloyed product was very close to that of Nb+Ti microalloyed product.The tensile strength of Ti microalloyed product was obviously better than that of Nb+Ti microalloyed product.The average yield and tensile strength ofΦ18 mm HRB400E steel bar reached 438.5 and 613.6 MPa respectively.The average yield and tensile strength ofΦ25 mm HRB400E steel bar reached 455 and 625 MPa respectively.