含V,Nb,Ti微合金钢的微观结构及力学性能  

Microstructure and Mechanical Properties of Micro-Alloy Steels Alloying with V,Nb,and Ti

作　　者：蒋蓉[1] 

机构地区：[1]武汉理工大学材料研究与测试中心,武汉430070

出　　处：《武汉理工大学学报》2009年第9期13-15,24,共4页Journal of Wuhan University of Technology

摘　　要：微合金化是提高钢材力学性能的有效方法。选择在低碳锰钢中加入微量的V、Nb、Ti 3种合金元素实现微合金化。并通过工艺参数的优化,制备了V,Nb,Ti质量分数分别为0.047%,0.031%,0.025%的多组元微合金化钢,σb为805 MPa,σs为590 MPa。通过扫描电子显微镜(SEM)和透射电子显微镜(TEM)的观察,分析了合金元素的析出强化和晶粒细化对钢材力学性能的影响规律。Micro-alloying is an effective method to improve the mechanical properties of steels. In this research, low carbon manganese steel alloying with vanadium, niobium and titanium has been prepared. The result shows that the optimization alloying concentrations for the low carbon manganese steel with ab of 805 MPa and as of 590 MPa are 0. 047% （V）, 0. 031% （Nb）, and 0.025% （Ti）, respectively. Scan electronic microscope （SEM） and transmission electron microscope （TEM） have been used to observe the microstructure of micro-alloy steel. The effects of precipitation strength of alloying elements and grain refinement on mechanical properties have been investigated.

关 键 词：微合金化 微观结构 析出强化 

分 类 号：TG113.11[金属学及工艺—物理冶金]