Production Technology Development for Niobium Vanadium Composite HRB500E Rebar with High Strength-to-yield Ratio
In the process of producing HRB500E rebar for domestic manufacturers,there are often low strength-to-yield ratio or a small amount of nonconformity. In this paper,the comparative experiment of niobium vanadium composite rebar and vanadium nitrogen rebar manufactured with industrial trial production is carried out. The results showed that the strength-to-yield ratio of rebar was increased by 0. 03 with the niobium vanadium composite process,ferrite transforma-tion was delayed due to presence of niobium,pearlite content was increased by about 10 percentage points so that tensile strength was increased;vanadium nitrogen alloy was relatively reduced due to the addition of niobium so that its precipitation strengthening and fine grain strengthening effects were reduced as well as yield strength of rebar was slightly decreased. The practices show that the strength-to-yield ratio of rebar and seismic resistance of HRB500E rebar are significantly improved with the niobium vanadium composite process.
HRB500E aseismic rebarniobium vanadium alloyingstrength-to-yield ratio
万方数据
维普
