V-N微合金化高强度铁塔用角钢的研究  

V-N Microalloyed High Strength Tower Angle Steel

作　　者：柴锋[1] 苏航[1] 杨才福[1] 陈雪慧[1] 

机构地区：[1]钢铁研究总院结构材料研究所,北京100081

出　　处：《钢铁研究学报》2010年第11期39-44,共6页Journal of Iron and Steel Research

摘　　要：利用V-N微合金化技术,在16Mn钢基础上进行铁塔用角钢的合金设计,并结合角钢的孔型轧制要求,考察了V/N合金设计以及板坯加热温度、轧制工艺参数对角钢组织性能的影响。结果表明,随着钢中V/N含量的增加,钢中弥散析出的第二相粒子数量显著增加,屈服强度显著提高,其中0.01%的钒含量对屈服强度贡献约为23 MPa。V-N微合金化角钢坯料再加热过程中V(C,N)粒子的溶解温度低于1 150℃,控制低的坯料加热温度有利于提高角钢的低温冲击韧性。终轧温度对低钒钢的屈服强度和韧性存在显著影响,但对高钒钢的组织性能影响不大。采用V-N微合金化设计后,角钢的综合性能得到显著提高,且力学性能对轧制工艺参数变化不敏感,因此,V-N微合金化技术适用于角钢的实际生产应用。Based on the 16Mn steel, by using V-N microalloyed technology, high strength angle steel was designed. According to the pass rolling requirement, effect of V-N alloy elements, reheating temperature and rolling parameters on mechanical properties and microstructures was studied in this paper. The results showed that the amount of second phase precipitates increased and yield strength improved significantly with increasing of V/N content. The increment of 0. 01 %V on yield strength was about 23 MPa. The dissolution temperature lower than 1 150 ℃ based on the thermodynamic calculation, a relative lower reheating temperature can increase the impact toughness of angle steel greatly. Finish rolling temperature showed great effect on yield strength and impact toughness in low V-bearing steel, but showed no obvious effect to the high V-bearing steel. Synthesis performance of angle steel was improved greatly by using V-N microalloyed technology, and mechanical properties was insensitive to the rolling parameters. V-N microalloyed technology was suitable for the angle steel mass production application.

关 键 词：V-N微合金化 铁塔 角钢 加热温度 终轧温度 

分 类 号：TG142.33[一般工业技术—材料科学与工程]