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熱處理對含Y元素AZ31鎂合金板材組織和性能的影響

Effect of heat treatment on the microstructure and properties of AZ31 magnesium alloy sheets containing Y element

  • 摘要: 對含Y元素AZ31鎂合金板材進行退火處理后的組織和性能進行了研究.結果表明:隨著退火溫度的升高,鎂合金晶粒尺寸逐漸增大,力學性能略有提高然后降低;退火時間對鎂合金晶粒尺寸影響不大;在300℃下退火1 h后板材性能達到最佳,抗拉強度為255 MPa,屈服強度為170 MPa,延伸率為24%;經過熱處理后鎂合金斷裂方式為準解理斷裂和韌性斷裂的復合形式.

     

    Abstract: The microstructure and properties of AZ31 magnesium alloy sheets containing Y element after annealing were studied.The results indicate that the grain size of the magnesium alloy gradually increases with the increase of annealing temperature,but the mechanical properties slightly increase and then decrease.Annealing time has little effect on the grain size.After annealing at 300℃ for 1h,the magnesium alloy achieves the best mechanical properties,with a tensile strength of 255 MPa,a yield strength of 175 MPa,and an elongation of 24%.The fracture mode of the magnesium alloy is quasi-cleavage fracture and ductile fracture after heat treatment.

     

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