發(fā)布時間：2019-07-16 09:39

【摘要】：利用硬度測試、室溫拉伸、杯突試驗、金相電子顯微鏡、掃描電子顯微鏡、透射電鏡等手段,研究冷軋中間退火對LZ91鎂鋰合金組織與性能的影響。結(jié)果表明,經(jīng)過中間退火后,合金發(fā)生再結(jié)晶,可以有效改善板材邊裂現(xiàn)象。較優(yōu)的中間退火工藝為200℃×1.0 h,薄板抗拉強度為224 MPa,較未經(jīng)中間退火的薄板低16.1%;伸長率為24.8%,較未經(jīng)中間退火的薄板升高11.2%;杯突IE值為6.23 mm,提高11.9%。未經(jīng)中間退火的合金試樣,其裂紋都平行于軋制方向呈直線狀分布;而退火后,破裂的部位在脹形的最高點,裂紋呈散射狀由膨脹中心沿著徑向發(fā)散。
[Abstract]:The effects of cold rolling intermediate annealing on the microstructure and properties of LZ91 magnesium-lithium alloy were studied by means of hardness test, room temperature tensile test, cupping test, metallographic electron microscope, scanning electron microscope and transmission electron microscope. The results show that the edge cracking of the alloy can be effectively improved by recrystallizing after intermediate annealing. The optimum intermediate annealing process is 200 鈩，

本文編號：2514995