混凝土结构中钢筋的力学性能研究

Mechanical Properties of Reinforced Steel Concrete Structures

以低碳微合金耐火钢为研究对象,通过不同的轧制工艺和正火处理研究了8组试验用钢的组织与力学性能的变化规律。结果表明,轧后冷却速度较快,则耐火钢的力学性能越好;随着正火温度的升高,YS比值逐渐增大,试验用钢在790℃时具有较好的高温耐火性能;试验用钢的主要组织为铁素体、贝氏体和少量的M-A岛组织,且粒状贝氏体组织有利于提高试验用钢的耐火性能。

Taking low carbon micro alloy steel as research object, the variation of microstructure and mechanical properties of eight group steels was studied through different rolling and normalizing methods. The results show that the faster the cooling speeds after rolling, the better the mechanical properties of fire resistant steel. With the increase of normalizing temperature, the ratio of YS increase gradually, and the test steel has good high-temperature fire resistance at 790 ℃. The main microstructures of the steel are ferrite, bainite and a small amount of M-A island group, and the granular bainite is helpful to improving the fire resistance of test steel.