冷轧压下率和再结晶退火温度对Ti-IF钢织构和成型性能的影响

Influence of Cold Rolling Reduction and Annealing Temperature on Texture and Formability of Ti-IF Steel

采用背散射衍射技术（EBSD）研究了3．13mm热轧板的冷轧压下量（65％～80％）和再结晶退火温度（660—780℃）对0．64～1．10mmTi—IF钢冷轧板（／％：0．02C、0．01Si、0．10Mn、0．013P、0．011S、0．064Ti、0．028A1、0．002ON）的织构和成型性能应变硬化指数（n）、塑性应变比（r）的影响。结果表明，Ti—IF钢冷轧板在冷轧压下率为75％时{111}织构含量最大，成型性能最佳；在740℃以下再结晶退火时材料{111}〈110〉织构含量高，高于740℃时材料{111}〈112〉织构含量高；在660～780℃再结晶退火随温度增高，材料{111}织构含量增加，成型性能提高。

The influence of cold rolling reduction （65% N 80% ） of 3.13 mm hot rolled plate and recrystallization an nealing temperature （660 - 780 ℃ ） on texture and formability-train-hardening exponent （n） and plastic stain ratio （r） of 0. 64 -1.10 mm cold rolled sheet of Ti-IF steel （/% ： O. 02C, 0. O1Si, O. lOMn, O. O13P, O. OllS, 0. 064Ti, O. 028A1, 0.002 ON） has been studied by electro backscattering diffraction method. Results show that with cold rolling reduction 75 % the { 111 } texture content in Ti-IF cold rolled sheet is highest and the formability is optimum; with recrystallization annealing at ≤740 ℃ the { Ill } 〈 ll0 〉 texture content in material is high and with annealing at more than ≤740 ℃ the { 111 }〈 112 〉 texture content in material is high; and as recrystallization annealing at 660 -780 ℃ with rising annealing temperature the { 111 } texture content in material increases and the formability of material also increases.