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采用Mo、Nb、V合金化方法设计了4种高强度耐火钢,对热轧态钢筋力学性能进行了研究,并对钢筋进行了正火处理,分析了热处理工艺、合金元素等对耐火钢筋性能的影响。得出的结论为:热轧态Mo+Nb、Mo+V,Mo+Nb+V钢筋屈强比超过0.8,不能达到建筑用钢的基本要求。经过820℃正火处理后的Mo+Nb、Mo+V钢筋和860℃正火处理后的Mo+Nb+V钢筋屈强比是在0.8以下,塑性提高较大。同时,在钢筋耐火性能方面,Mo+Nb合金化效果优于Mo+V合金化效果。
Four kinds of high strength refractory steel were designed by the alloying method of Mo, Nb and V. The mechanical properties of the hot rolled steel were studied. And the normalized steel was treated. The effects of heat treatment process and alloying elements on the properties of the refractory steel Impact. The conclusion is: the hot-rolled Mo + Nb, Mo + V, Mo + Nb + V steel yield ratio exceeds 0.8, can not meet the basic requirements of construction steel. After 820 ℃ normalizing treatment of Mo + Nb, Mo + V rebar and 860 ℃ normalized Mo + Nb + V steel yield ratio is 0.8 or less, greater plasticity. At the same time, Mo + Nb alloying effect is better than that of Mo + V alloying in refractory properties of steel.