阅读说明：本技术 一种通过多向热轧制和退火处理促进镁合金第二相析出的方法 (Method for promoting precipitation of second phase of magnesium alloy through multidirectional hot rolling and annealing treatment ) 是由 李志刚 苗源 王慧远 马品奎 张子乐 刘丰宁 王明辉 贾红杰 于 2021-07-22 设计创作，主要内容包括：本发明公开了一种通过多向热轧制和退火处理促进镁合金第二相析出的方法,属于金属材料加工成形工艺领域。具体为：将含第二相的镁合金板材进行多道次换方向热轧,每道次压下量依次加大,道次间将镁合金板材放入加热箱中加热保温,轧制后再将板材进行退火热处理。本发明通过压下量递增的多向轧制工艺促进了位错的累积,增加了位错密度。这种高位错密度又在道次间加热保温和轧制后的退火过程中为析出相形核提供了能量,进而促进了镁合金板材第二相的析出,增加了合金析出强化效果,抑制了再结晶过程中的晶粒长大,提高了合金板材的力学性能。本发明制备方法简单,能有效增加合金板材析出强化和细晶强化效果,提高力学性能,有良好的应用前景。(The invention discloses a method for promoting the precipitation of a second phase of a magnesium alloy through multidirectional hot rolling and annealing treatment, and belongs to the field of metal material processing and forming processes. The method specifically comprises the following steps: and (2) performing multi-pass direction-changing hot rolling on the magnesium alloy plate containing the second phase, sequentially increasing the reduction of each pass, putting the magnesium alloy plate into a heating box for heating and heat preservation between passes, and performing annealing heat treatment on the plate after rolling. The invention promotes the accumulation of dislocation by the multidirectional rolling process with increasing reduction and increases the dislocation density. The high dislocation density provides energy for nucleation of a precipitated phase in the annealing process after heating, heat preservation and rolling among passes, so that the precipitation of a second phase of the magnesium alloy plate is promoted, the alloy precipitation strengthening effect is improved, the growth of crystal grains in the recrystallization process is inhibited, and the mechanical property of the alloy plate is improved. The preparation method is simple, can effectively increase the precipitation strengthening and fine grain strengthening effects of the alloy plate, improves the mechanical property, and has good application prospect.)