CAJ | 학술논문

研究了异步轧制AZ31镁合金板材经200～350 ℃退火30～120 min后的组织性能演化.在试验条件下,AZ31镁合金板材在200 ℃退火时,随保温时间的延长,组织的均匀程度和晶粒尺寸没有明显变化;在300 ℃退火30 min,基本完成再结晶过程,获得均匀细小的等轴晶,保温时间增加到60 min时,部分再结晶晶粒长大;在350 ℃退火30 min和60 min,均在完成再结晶的同时晶粒长大;300 ℃退火30 min后AZ31镁合金板材的综合性能较好,室温抗拉强度为315 MPa,伸长率为33.0%.
연구료이보알제AZ31미합금판재경200～350 ℃퇴화30～120 min후적조직성능연화.재시험조건하,AZ31미합금판재재200 ℃퇴화시,수보온시간적연장,조직적균균정도화정립척촌몰유명현변화;재300 ℃퇴화30 min,기본완성재결정과정,획득균균세소적등축정,보온시간증가도60 min시,부분재결정정립장대;재350 ℃퇴화30 min화60 min,균재완성재결정적동시정립장대;300 ℃퇴화30 min후AZ31미합금판재적종합성능교호,실온항랍강도위315 MPa,신장솔위33.0%.
Microstructure and properties of asynchronous rolling AZ31 magnesium alloy sheets during annealing at 200～350℃ for 30～120 min were analyzed. Homogenization and grain size in the AZ31 magnesium alloy sheets are nearly independent of the holding time during annealing at 200℃. Recrystallization is basically completed in the alloy sheet with annealing at 300℃ for 30 min and uniformly fine equiaxed grain can be observed, however, with increasing holding time to 60 min, partial recrystallization grain is coarsened. Furthermore, with annealing at 350℃ for 30 min and for 60 min, the completion of recrystallization companying with the coarseness of grain size can be observed. Tensile strength at room temperature and elongation of the AZ31 magnesium alloy sheets with annealing at 300℃ for 30 min reach 315MPa and 33%, respectively, exhibiting desirable properties.