冷轧低碳钢带中各晶体学位向的点阵畸变储能

LATTICE DISTORTION STORED ENERGY OF CRYSTALLOGRAPHIC ORIENTATIONS IN COLD-ROLLED LOW CARBON STEEL SHEETS

为了弄清历史上争论了很久的关于冷轧低碳钢中主要晶体学方向的点阵畸变储能孰大孰小的问题和为研究形变金属再结晶织构形成机制提供依据，利用X射线衍射线形分析技术测定了经过74．5％～88%冷轧的不同成分的低碳钢的13个方向的点阵畸变及其储能。结果显示，各位向的弹性模量和冷轧压下率共同影响着基体中各位向畸变储能的相对大小。当压下率比较小时，主要位向的点阵畸变储能倾向于γ100〉γ110〉γ112〉γ111；而当压下率较大（77％～88％）时，倾向于γ110〉γ100〉γ112〉γ111。

The order from big to small of lattice distortion stored energy of main crystallography orientations of cold-rolled low carbon steel sheets has been argued for a long time. In order to provide information for investigating re-crystallized mechanism, lattice distortion stored energy of 13 orientations of 74. 5%-88% relative draught cold-roll samples with different process and composition are measured by X-ray analysis technique. The result shows that lattice distortion and its stored energy of crystallography orientations depend on their Young＇s modulus and cold-rolling relative draught. The order of stored energy of main orientations is γ100 〉γ110〉γ112〉γ111 as relative draught is lower, and γ110〉γ100〉γ112〉γ111 if it upper to 77%-88%.