Ti微合金化冷轧高强钢的再结晶温度研究

来源期刊：钢铁钒钛2011年第2期

论文作者：吕盛夏 陈事 毛新平 王喜 朱达炎 霍向东

文章页码：43 - 47

关键词：Ti微合金钢； 冷轧高强钢； 再结晶温度； 碳化钛； 紧凑式带钢生产

Key words：Ti micro-alloying steels； cold rolled high strength steel； recrystallization temperature； titanium carbides； compact strip production

摘    要：采用半小时等温法、显微硬度测量和金相组织观察等试验手段,研究了Ti微合金化冷轧高强钢的再结晶温度。结果发现:不同变形量的冷轧板再结晶规律基本相同,再结晶温度随变形量增加略有降低;640℃以下为回复阶段,随着温度升高,等轴晶大量形核长大,硬度迅速降低,到840℃再结晶晶粒反常长大;该钢种的再结晶温度高达700～710℃,钢中大量纳米级TiC析出物和溶质原子是再结晶温度提高的主要原因。

Abstract: The recrystallization temperature of Ti microalloyed high strength steel in cold rolling were investigated by means of microhardness testing,metallographic structure observation and isothermal annealing for half an hour.The results shown that the regulations of recrystallization were basically the same in the different percentage of cold-rolling reduction steels,and the recrystallization temperature of steel had a little drop trend with the percentage of cold-rolling reduction increasing.The process was defined recovery at temperatures below 640℃,a large number of equiaxed grains nucleated,and the microhardness rapidly reduced with temperature increasing.Recrystallization grains grow up abnormally when the temperature rose to 840℃.The recrystallization temperature of steel rose to 700～710℃,large amount of nanometer TiC particles and solute atoms existed in steel were main reasons for the high recrystallization temperature.