Cr11铁素体不锈钢退火过程中织构变化

TEXTURE EVOLUTION OF FERRITIC STAINLESS STEELS CONTAINING 11% Cr DURING ANNEALING

利用电子背散射衍射技术(EBSD)并结合光学显微镜和透射电子显微镜,对Cr11铁素体不锈钢不同退火时间下的再结晶织构的演变进行了分析。结果表明,随着退火时间的延长,{112}<110>和{100}<110>织构减弱,{111}<110>和{111}<112>织构明显增强,当退火时间达到1800s时,再结晶织构为集中的{111}<112>,这主要是再结晶时优先在{111}形变织构基体中形核的结果;对Cr11钢晶粒长大过程中织构演变机制的探讨认为,{111}<112>织构成为最终稳定取向是晶粒选择生长的结果,∑13b晶界在这过程中起着重要作用。

The development of recrystallization texture in ferritic stainless steels with 11% Cr was studied by Electron Back Scattering Diffraction （EBSD） combined with optical microscopy and TEM. According to the results, the density of {112} 〈 110 〉 and { 100} 〈 110 〉 texture decreased but { 111 } 〈 110 〉 and { 111 } 〈 112 〉 texture increased with the increasing of annealing time. When the annealing time was 1800s, the principal texture changed to {111} 〈 112〉 due to {111} matrix priority nucleation. A possible formation mechanism of texture during grain growth in ferritic stainless steels with 11% Cr was discussed. With the extension of annealing time, {111} 〈 112 〉 texture become principal by the selection growth of grains, in which the ∑ 13b grain boundary played an important role.