摘要
以不同热轧卷取温度生产的典型成分Ti-IF钢冷轧硬卷为研究材料,结合改良森吉米尔法连续热镀锌线的工艺特点,采用Gleeble-1500模拟退火方法和金相、X射线织构测试和硬度测试等分析手段,系统研究了退火过程中试验钢组织、再结晶温度和织构的变化。研究结果表明,随着热轧卷取温度的提高,完全再结晶温度降低;在880℃以下,退火温度对铁素体晶粒度影响很小,热轧低温卷取Ti-IF钢的铁索体晶粒度在11．0级以上,热轧高温卷取Ti-IF钢在10．5级左右,当退火温度提高到920℃时,晶粒明显粗化;试验钢退火后具有较强的{223}〈110〉和{114}〈110〉织构,且热轧卷取温度和退火工艺条件对它们影响较小,随着退火温度的升高,试验钢的{111}织构有增强的趋势,特别是当退火温度较高时,退火温度在920℃时,{111}织构明显增强。
According to the technical process of modified Sindzmir continuous hot - dip galvanizing lines, Gleeble - 1500 annealing simulation were conducted to systematically study the effect of coiling temperature on the evolution of microstructure and recrystallization textures as well as the recrystallization temperature of a Ti - IF steel during annealing, and the means of optical microscopy, X - ray texture measurement and hardness testing were employed in the study. The steel was industrially hot rolled with different coiling temperatures and cold relied. The results showed that the full recrystallization temperature decreases as the coiling temperature is increamed. When the annealing temperature is below 880℃, the annealing temperature has little influence on the recrystallization grain size, the grain size is above ASTM grade 11.0 for low temperature coiled steel and about ASTM grade 10.5 for high temperature coiled steel. When the annealing temperature is risen to 920℃, the grain remarkably coarsens. Strong {223} 〈 110〉 and {114} 〈 110〉 texture components were found after annealing. Their intensity is little affected by coiling temperature and annealing process yet the intensity of {111 } recrystallization texture tends to increase when the annealing temperature is increased, especially at higher annealing temperature. When the annealing temperature is further increased to 920℃, the intensity of {111 } recrystallization texture increases obviously.
出处
《钢铁钒钛》
CAS
2007年第1期1-8,共8页
Iron Steel Vanadium Titanium
关键词
TI-IF钢
再结晶退火
显微组织
织构
Ti - IF steel
recrystallization annealing
microstructure
textures
