Nb和Ti复合添加对微碳深冲钢组织性能与织构的影响  

Effect of Co-addition of Nb and Ti on Properties and Textures of Two Micro-Carbon Deep Drawing Steels

作　　者：汪志刚[1] 张迎晖[1] 杨泰胜 齐亮[1] 叶洁云[1] 

机构地区：[1]江西理工大学材料科学与工程学院,赣州341000

出　　处：《材料研究学报》2015年第10期779-786,共8页Chinese Journal of Materials Research

基　　金：江西省科技厅自然(青年)科学基金20144BAB2160012;江西省教育厅科技研究项目GJJ14445资助~~

摘　　要：用SEM、TEM、XRD和EBSD等手段分析了不同Nb和Ti含量微碳钢第二相粒子的析出行为,研究了析出相对微碳钢组织性能和织构演变的影响。结果表明,微碳钢的析出相主要由尺寸较大的(Nb,Ti)(C,N)复合析出物、尺寸较小的弥散分布的Nb基碳化物和碳氮化物构成;随着Nb、Ti添加量的增加,细小的第二相粒子数量明显增多,并在再结晶过程中强烈抑制<111>//ND纤维织构的发展,尤其是{223}<110>和{111}<110>取向;多边形铁素体基体以及在快冷过程中的马氏体相变确保了低Nb和Ti含量微碳钢的强度与深冲性能的良好匹配。Precipitation behavior of second phase in two micro-carbon steels with different amounts Of Nb and Ti were investigated using SEM and TEM technique. In the meanwhile, the effect of precipi- tates on microstructure, texture evolution and properties of the micro-carbon steels was investigated by XRD and EBSD technique. Results show that precipitates in the micro-carbon steels were mainly consist- ed of larger size （Nb, Ti）（C, N） composite particles and finer Nb-based carbide and carbonitride dispersed in matrix. With the increasing of Nb and Ti addition the fine second phase particles increased significant- ly, which strongly inhibit the development of 〈111〉fiND fiber texture during recrystallization, especially for {223}〈110〉 and {111}〈110〉 orientation. As for micro-carbon steel with low content of Nb and Ti, a good combination between strength and deep drawing ability can be acquired due to the occurrence of a ma- trix of polygonal ferrite and martensite transformation during fast cooling process.

关 键 词：金属材料 深冲钢 析出相 织构演变 组织结构 

分 类 号：TG113[金属学及工艺—物理冶金]