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对含Y元素AZ31镁合金板材进行退火处理后的组织和性能进行了研究.结果表明:随着退火温度的升高,镁合金晶粒尺寸逐渐增大,力学性能略有提高然后降低;退火时间对镁合金晶粒尺寸影响不大;在300℃下退火1 h后板材性能达到最佳,抗拉强度为255 MPa,屈服强度为170 MPa,延伸率为24%;经过热处理后镁合金断裂方式为准解理断裂和韧性断裂的复合形式.
The microstructure and properties of AZ31 magnesium alloy sheet with Y element after annealing treatment were studied.The results show that with the increase of annealing temperature, the grain size of magnesium alloy gradually increases, the mechanical properties slightly increase and then decrease; the annealing time Which has little effect on the grain size of magnesium alloy. After annealed at 300 ℃ for 1 h, the performance of the sheet reaches the best. The tensile strength is 255 MPa, the yield strength is 170 MPa and the elongation is 24%. After heat treatment, the fracture mode of magnesium alloy For the quasi-cleavage and ductile fracture composite form.