Ti-IF和Ti+Nb-IF钢铁素体区热轧组织和织构特征

Texture and Microstructure of Warm-Rolled Ti-IF and Ti+Nb-IF Steel Sheets

选择Ti-IF和Ti+Nb-IF钢铁素体区热轧板为实验材料,采用金相组织观察、二相粒子形貌分析、织构分析等实验手段对其组织和织构特征进行了分析.结果表明:Ti-IF钢比Ti+Nb-IF钢的晶粒尺寸大,二相粒子尺寸大且数量多;两种钢的表层板织构强弱正好相反且在二分之一层形成了具有冷轧特征的织构,而纤维织构表层为(1 1 0)∥ND,(1 1 2)∥ND,(1 0 2)∥ND,二分之一层为(0 0 1)∥ND,(1 1 1)∥ND,(1 1 2)∥ND;区别于Ti+Nb-IF钢,Ti-IF钢在表层出现了〈0 0 1〉∥RD,二分之一层出现了〈1 0 2〉∥RD织构组分.

The microstructure and texture characteristics of warm-rolled Ti-IF steel sheets and Ti ＋ Nh-IF steel sheets were investigated. The results of optically metallographic observation, morphology analysis of dispersed second phase particles and texture analysis showed that the grain size and the size and quantity of second phase particles of Ti-IF steel sheets are all greater than that of Ti ＋ Nb-IF steel sheets. In the surface layer, the texture intensity of these two steel sheets are quite different. But in the middle layer, cold rolled texture component appears in Doth steel sheets. The fibre texture components are （10）∥ND, （102）∥ND insurface layer, and （001）∥ND, （111）∥ND and （112）∥ND in middle layer. The （001）∥RD and （102）∥RD appear in the surface and middle layers of Ti-IF steel sheet samples respectively, which is different from Ti ＋ Nb-IF steel sheets.