HRB400热轧带肋钢筋的微合金化研究

Microalloying Study on HRB400 Hot Rolled Ribbed Reinforced Bar

为提高热轧带肋钢筋HRB400的综合力学性能,试验了三种增氮剂Si3N4、VN和MnSiN的增氮效果,并将它们与FeV、FeNb、FeTi等合金配比进行微合金化研究。以钢筋的屈服强度、抗拉强度和延伸率作为力学性能的评价指标。研究结果表明:MnSiN的增氮效果最为明显,且它的使用可降低FeV、FeNb合金的消耗量,从而降低生产成本。采用MnSiN、FeV微合金化生产HRB400钢筋时,当MnSiN在钢中的加入量为5 kg/t时,FeV的适宜加入量为0.50 kg/t。

To improve comprehensive mechanical properties of hot-rolled ribbed reinforced bar HRB400,the effects of increasing nitrogen of nitride alloys Si3N4,VN and MnSiN were tested respectively.Microalloying research was carried out by the combination of nitride alloys and FeV,FeNb and FeTi.The yield strength,tensile strength and elongation of bar were used as the evaluation index of mechanical properties.The results show that the effect of increasing nitrogen of MnSiN is the most obvious,and its use can reduce the consumption of alloys FeV and FeNb,further reduce production costs.When producing HRB400 with MnSiN and FeV microalloying,5 kg of MnSiN alloy and 0.50 kg of FeV for one ton of steel are appropriate ratios.