V、N、Nb微合金化对薄板坯连轧带钢组织和性能的影响  

The effect of V,N,Nb microalloying on the microstructure and properties of containing strip rolled from thin slab

作　　者：张娟[1] 呼努斯图[2] 由国艳[1] 

机构地区：[1]内蒙古工业大学材料科学与工程学院,内蒙古呼和浩特010051 [2]内蒙古师范大学物理与电子信息学院,内蒙古呼和浩特010020

出　　处：《材料热处理学报》2007年第B08期14-17,共4页Transactions of Materials and Heat Treatment

基　　金：内蒙古工业大学科研基金项目(No.X200511)

摘　　要：在试验室模拟薄板坯连铸连轧过程,板坯均热后被轧制到7mm厚并通过控冷来模拟辊道冷却和带钢的缓慢卷取过程。本文选用低碳钢,研究了V、N、Nb微合金化对其组织和性能的影响。通过试验证明在V-N钢中加入Nb对钢的强化机制有较大影响,使V-N-Nb钢中的析出强化增大,这表明V-N-Nb微合金化可充分地发挥微合金元素在钢中的析出强化作用,析出强化对屈服强度的贡献比V-N微合金化提高17MPa。A laboratory technique has been developed to simulate the thin slab casting and hot charging process for slabs in the thickness 50mm. Following temperature equalization, the slabs were rolled to a thickness of 7mm, and cooled to simulate the run out table cooling and slow coil cooling of strip. The steels investigated were low carbon steels, and the effects on the microstructure and properties of vanadium, nitrogen and niobium microalloying were studied. Additions of niobium to the vanadium-nitrogen steels had a influence on mechanical properties. The results demonstrated that the precipitation strengthening of V-N-Nb steel has obviously improved in comparison with V-N steel. Therefore, after microalloying of vanadium and niobium, the precipitation strengthening of vanadium in the steel is remarkably improved. The effectiveness of precipitate strengthening in V-N-Nb steel is 17MPa higher than V-N steel.

关 键 词：薄板坯 微合金化 析出强化 显微组织 屈服强度 

分 类 号：TG142.1[一般工业技术—材料科学与工程]