采用电子背散射衍射(EBSD)对178 mm厚EH690钢不同位置取向差进行了研究。其中,表面,t/4和t/2的大角度晶界比例分别为65%,64%,61%。
Electron backscattering diffraction (EBSD) was used to study the orientation of 178 mm thick EH690 steel at different positions. Among them, the ratio of large angle grain boundaries on surface, t/4 and t/2 is 65%, 64% and 61%, respectively.