论文部分内容阅读
在实验室模拟了某钢厂罩式退火工艺,利用金相显微镜、洛氏硬度计、XRD衍射仪和透射电镜研究了稀土低碳钢冷轧板第二相粒子的析出行为对组织织构演变的影响。退火后成品板为饼形晶粒,退火过程中{001}<110>织构逐渐减弱,{111}织构逐渐增强且在成品板中保留一定量的{112}<110>织构。退火过程中有Fe3C析出且对组织织构演变影响较小,稀土元素在650℃时依附于Fe3C上析出,起到了稀土元素的微合金化作用,Al N在600℃以上析出,促使再结晶晶粒定向长大对饼形晶粒的形成有重要的作用,热力学及动力学计算表明退火过程中Mn S没有析出,其对组织织构演变影响极小。
In a laboratory simulation of a steel mill hood annealing process, the use of metallographic microscope, Rockwell hardness tester, XRD diffraction and transmission electron microscopy of rare earth mild steel cold-rolled plate second-phase particles precipitation behavior of the organizational texture evolution Impact. After annealing, the final product was a cake-shaped grain. The texture of {001} <110> gradually weakened and the texture of {111} gradually increased and a certain amount of {112} <110> texture remained in the finished sheet. During the annealing process, Fe3C precipitates and has little effect on the microstructure evolution. Rare earth elements are precipitated on Fe3C at 650 ℃, which plays a role of microalloying of rare earth elements. AlN precipitates above 600 ℃ and promotes the recrystallization The orientation and growth of grains play an important role in the formation of pie-shaped grains. Thermodynamic and kinetic calculations show that Mn S does not precipitate during annealing and has little effect on the microstructure evolution.