根据企业原料特点(红土镍矿作为高炉炼铁配矿),提出充分利用铁水/钢水中的镍铬元素,开发资源节约型高强抗震钢筋的思路.在20MnSi钢的基础上,根据HRB500E级钢筋的性能要求进行成分设计,研究了镍、铬、钒等合金元素质量分数对钢筋力学性能的影响.结果表明,钢中镍、铬元素质量分数均为0.25%时,钒质量分数可以降低至0.062%,即满足HRB500E级钢筋的力学性能要求;而钢中不含镍、铬元素时,钒质量分数须达到0.11%才能满足性能要求.含镍铬HRB500E钢筋的钒加入量仅相当于不含镍铬的钒钢的56.36%,节钒效果显著.这种高强钢筋生产方法不仅节约了钒资源,还实现了对难处理的低品质红土镍矿的有效利用.
A new method of producing resource saving,high strength,anti-seismic steel rebar was proposed,which could make full use of Ni,Cr elements in hot metal/liquid steel,as lateritic nickel ore was used as one of BF raw materi-al. On the basis of 20MnSi steel,chemical components were designed according to the requirements of HRB500E grade rebar of China national standard. The effects of alloy elements,such as Ni,Cr and V on the mechanical properties of re-bar were studied. The results show that,the mechanical properties of rebar met the requirements of HRB500E grade steel when the contents of Ni,Cr contents were 0.25%and the content of V reduced to 0.062%. As for the rebar which did not contain Ni,Cr elements,V content should reach 0.11%to meet the performance requirements of HRB500E grade. V con-tent of HRB500E rebar which contains Ni and Cr is only equivalent to 56.36%of rebar without Ni and Cr. Hence,the ef-fect of vanadium saving is obvious. This method not only saves the resource of vanadium,but also realizes the effective utilization of low-quality lateritic ore.
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