风淬钢渣的微观结构变化研究

Study on Changes of Microstructure for Air Quench Steel Slag

通过观察风淬钢渣中各物相随时间的变化,利用Photoshop和Image J软件计算各物相的颗粒个数与面积,研究风淬钢渣的微观结构变化。结果发现,风淬钢渣的物相种类随时间不发生变化,衍射峰强度略有降低。渣中硅酸二钙相的颗粒个数随时间延长而明显减少,相的总面积变化很小。20天内,颗粒平均尺寸由4.96μm增长到6.06μm,而其他物相没有明显变化。可见,硅酸二钙颗粒尺寸的增大,不是由其他物相转变而来,而是其自身发生了重组现象。风淬钢渣中硅酸二钙的相变方程为1-(1-α)^(1/3)=0.039 T。

The changes of microstructure for air quench steel slag are studied by observing the changes of various phases in air quench steel slag with time as well as calculating the numbers and area of particles for various phases with the softwares of Photoshop and Image J.The results showed that the phase types of air quench steel slag were not changed with time and diffraction peak intensity was slightly decreased.The number of particles for dicalcium silicate phase in slag is decreased significantly with time and total area of the phase is changed a little.Within 20 days,the average particle size is increased from 4.96μm to 6.06μm,while there are no significant changes for other phases.It can be seen that the increase of particle size for dicalcium silicate is due to its own recombination,not the change of other phases.The equation of phase change for dicalcium silicate in air quench steel slag is 1-(1-α)^(1/3)=0.039 T.