冷轧压下率对IF钢退火热处理织构及成形性的影响  

Effect of cold rolling reduction rate on texture and formability of IF steel after annealing treatment

作　　者：马毅 张立文[1] 宋康杰 罗亚龙 苗露阳 张驰[1] 吴鑫 王印周 Ma Yi;Zhang Liwen;Song Kangjie;Luo Yalong;Miao Luyang;Zhang Chi;Wu Xin;Wang Yinzhou(School of Materials Science and Engineering,Dalian University of Technology,Dalian Liaoning 116024,China;Hansteel Company,HBIS Group,Handan Hebei 056015,China)

机构地区：[1]大连理工大学材料科学与工程学院,辽宁大连116024 [2]河钢集团邯钢公司,河北邯郸056015

出　　处：《金属热处理》2024年第10期121-125,共5页Heat Treatment of Metals

基　　金：国家自然科学基金(52274375)。

摘　　要：通过试验研究了不同冷轧压下率的IF钢在800℃保温300s条件下退火热处理后的织构及成形性能。利用金相显微镜与电子背散射衍射技术(EBSD)测量了不同冷轧压下率下退火样品的微观组织及织构。使用万能拉伸试验机对不同IF钢样品进行了拉伸试验。试验结果表明,随着冷轧压下率的增大,再结晶晶粒尺寸呈现出逐渐减小的趋势。沿γ-取向线的织构均匀性随着冷轧压下率的增大先增加后减小。在75%冷轧压下率时,织构的均匀性最好。通过对比不同IF钢试样的塑性应变比(r值)及各向异性△r可知,冷轧压下率为75%时IF钢具有最大的r值及最小的各向异性△r,因此具有优异的成形性能。The texture and formability of IF steel with different cold rolling reduction rates after annealing at 800 ℃ for 300 s were studied.The microstructure and texture of annealed specimens at different cold rolling reduction rates were measured by metallographic microscopy and electron backscatter dffraction(EBSD).The tensile tests of the IF steel specimens were carried out by means of universal tensile testing machine.The experimental results show that the recrystallization grain size decreases gradually with the increase of cold rolling reduction rate.The texture uniformity along the gamma-orientation line increases first and then decreases with the increase of cold rolling reduction rate.When the reduction rate is 75%,the uniform shape of the texture is optimal.By comparing the plastic strain ratio(r value)and anisotropy △r of the different IF steel specimens,it can be seen that IF steel has the largest r value and the smallest anisotropy △r when the cold rolling reduction rate is 75%.Therefore,it has excellent formability.

关 键 词：IF钢 冷轧 织构 EBSD 

分 类 号：TG161[金属学及工艺—热处理]