帘线钢V、N微合金化后的组织与冷拉性能变化  

Changes of Microstructures and Cold Drawing Properties of V-N Microalloyed Tire Cord Steel

作　　者：万宝意[1] 刘宏玉[1,2] 周鹏[1] 刘建华 陈小龙 

机构地区：[1]武汉科技大学理学院,湖北武汉430065 [2]冶金工业过程系统科学湖北省重点实验室,湖北武汉430065 [3]攀钢集团攀枝花钢钒有限公司,四川攀枝花617000

出　　处：《钢铁钒钛》2014年第2期40-45,共6页Iron Steel Vanadium Titanium

摘　　要：为探讨以V代C的可能性及V、N对冷拉过程中渗碳体的影响规律,对传统70级帘线钢进行了V、N微合金化。测量了不同冷拉应变量试样的拉伸及扭转性能;用透射电镜及能谱仪(TEM+EDS)分析了V、N相的析出;通过振动样品磁强仪(VSM)测量饱和磁化强度,预测了渗碳体溶解变化规律。结果表明:加V导致冷拉试样抗拉强度总体上呈升高趋势,延伸率稍微降低,扭转次数降低。加N导致冷拉试样抗拉强度总体上先升高后降低,延伸率升高,扭转次数降低。V部分溶于铁素体,部分溶于渗碳体。N含量较低时,N固溶于铁素体;N含量增加到0.008 2%,开始有V析出相在铁素体中析出。随V、N的增加,冷拉过程渗碳体趋于稳定。(70级+0.086%V)可代替80级帘线钢。To explore the possibility of replacing C with V and the effect of V and N on cementite during cold drawing process, traditional grade 70 tire cord steel was microalloyed with V and N. Tensile properties and torsional properties were measured for specimens at different cold drawing strains; the precipitation phases containing V and N were analyzed by a transmission electron microscope and energy dispersive spectrometer （TEM ＋ EDS）, saturation magnetization was measured by a vibrating sample magnetometer （VSM） to predict the variation rules of cementite dissolution. It is shown that with the addition of V, tensile strength of the cold drawn samples generally increases, elongation slightly declines, and the number of torsion decreases. With the addition of N, tensile strength of the cold drawn samples increases before decreases, elongation rises, and the number of torsion decreases. V partially dissolves in ferrite or cementite. N is soluble in ferrite when its content is low,the phases containing V start to precipitate in ferrite when N increases to 0. 008 2%. With the increase of V and N, the cementite tends to stabilizes during the cold drawing process. The grade 80 tire cord steel can be replaced with （grade 70 ＋ 0. 086% V）.

关 键 词：帘线钢 V N 冷拉性能 渗碳体溶解 

分 类 号：TG142.1[一般工业技术—材料科学与工程]