【摘要】 利用半小时等温法、光学显微镜、显微硬度计和透射电镜等研究了钛微合金化无取向硅钢和普通无取向硅钢的再结晶温度、硬度、显微组织和析出物分布。结果表明：钛微合金化无取向硅钢的再结晶温度比普通无取向硅钢的再结晶温度高55℃;两种钢的显微组织变化规律相同，随着退火温度升高再结晶晶粒开始出现，硬度降低，变形组织逐渐被取代；钛微合金化无取向硅钢中含有纳米级含钛析出物，分布在位错附近，在退火过程中会钉扎位错，阻碍晶界移动延缓再结晶。更多还原

【Abstract】 Recrystallization temperature, hardness, microstructure and precipitation distribution of Ti microalloyed non-oriented silicon steel and ordinary non-oriented silicon steel were studied by means of isothermal annealing for half hour, optical microscope, microhardness tester and transmission electron microscopy. The results show that the recrystallization temperature of the Ti microalloyed non-oriented silicon steel is 55 ℃ higher than that of the ordinary non-oriented silicon steel. The microstructure changes of the two steels are the same. As the annealing temperature increases, recrystallized grains begin to appear, the hardness decreases, and the deformed structure is gradually replaced. The Ti microalloyed non-oriented silicon steel contains nanoscale titanium containing precipitates distributed near dislocations, which can pin dislocations during annealing, hindering grain boundary movement and delaying the recrystallization.更多还原