微钛处理对含磷钢薄钢板组织和性能的影响  

Effects of Titanium Microalloying on Microstructure and Properties of Rephosphorized Steel Sheet

作　　者：郑之旺[1] 

机构地区：[1]攀枝花钢铁研究院,四川攀枝花617000

出　　处：《钢铁钒钛》2007年第2期9-15,共7页Iron Steel Vanadium Titanium

摘　　要：以低碳含磷钢为研究对象,通过分析不同卷取温度时(分别为600、650和700℃)热轧态和冷轧退火态的显微组织和力学性能以及退火再结晶动力学行为,研究了微钛(0.015%)处理对钢的组织和性能的影响。研究结果表明,热轧卷取温度对低碳含磷钢的显微组织和力学性能影响很小,但微钛处理后,低碳含磷钢的再结晶动力学受到延迟,特别当卷取温度为600℃时,不但热轧态和冷轧退火态的强度提高,而且力学性能对卷取温度和退火温度的敏感性增加;随着卷取温度的降低,热轧态和冷轧退火态的强度提高,且冷轧退火态强度随着退火温度升高而降低的幅度增加。微钛处理对含磷钢组织和性能的影响与钛析出相的粗化行为有关。The effects of 0.015 % titanium microalloying on the microstructure and properties of rephosphorized steel sheet were investigated by analyzing its microstructure and properties as hot- rolled and as annealed as well as its recrystallization dynamic behavior during annealing under different coiling temperatures （600, 650 and 700℃ separately）. The results showed that the micwstructure and properties of the rephosphorized steel sheet were little affected by the hot - wiling coiling temperature whereas its recrystallization dynamics was prohibited after titanium microalloying, especially coiling at 600℃. It was also found that not only the strength of as hotwiled or as annealed was increased after titanium microalloying, but also the mechanical properties became more sensitive to coiling temperature and annealing temperature. As a result, both the as hotwiled and the as annealed strength of the Ti treated rephosphorized steel sheet were increased as the coiling temperature or the annealing temperature was lowered. The effect of titanium on the microstructure and properties of the rephosphorized steel was related to the coarsening of titanium precipitates.

关 键 词：含磷钢 微钛处理 显微组织 力学性能 

分 类 号：TG113[金属学及工艺—物理冶金]