终冷温度对风电用S460级钢组织性能的影响

在S460铁素体钢的控轧控冷实验中,采用纯净冶炼,控制轧制和加速冷却相结合的方法,研究了不同终冷温度对钢板显微组织和力学性能的影响.不同终冷温度下显微组织均由多边形铁素体和珠光体组成.终冷温度为570℃时,较细的显微组织导致了较高的-80和-110℃冲击功.终冷温度为630℃时,较多的析出粒子导致了较高的屈服强度以及-...

Effect of final cooling temperature on microstructure and properties of S460 steel for wind power

In the controlled rolling and controlled cooling experiment of S460 ferritic steel, the effects of different final cooling temperatures on the microstructure and mechanical properties of the plate were studied by means of pure smelting, controlled rolling and accelerated cooling. The microstructures at different final cooling temperatures were composed of polygonal ferrite and pearlite. When the final cooling temperature was 570℃, the finer microstructure leaded to higher impact energy of -80℃ and -110℃. When the final cooling temperature was 630℃, more precipitated particles leaded to higher yield strength and lower impact energy at -80℃ and -110℃. It is found that the composition design, microstructure refinement and second phase precipitation behavior play a decisive role in the strength and toughness of S460 steel for wind power.