论文部分内容阅读
研究了AZ31镁合金在挤压过程中长条晶粒的形成机理、挤压工艺对形成长条晶粒的影响以及长条状晶粒对室温拉伸变形断裂的影响。为消除长条晶粒,进行了不同工艺条件下的退火处理。结果表明:在挤压比为4.5时,长条状晶粒比较粗大,利用退火处理无法消除;当挤压比提高到10.1时,长条状晶粒比较狭窄,利用退火处理能有效地改善组织均匀性,较好的消除长条晶粒,其平均晶粒尺寸大约为20μm。
The formation mechanism of long grains, the influence of extrusion process on the formation of long grains and the effect of long grains on the tensile deformation and fracture of AZ31 magnesium alloy during extrusion were investigated. In order to eliminate the long grain, the annealing process under different conditions was carried out. The results show that when the extrusion ratio is 4.5, the elongated grains are coarse and can not be eliminated by annealing. When the extrusion ratio is increased to 10.1, the elongated grains are relatively narrow and the annealing treatment can effectively improve the structure Uniformity, better elimination of long grains, the average grain size of about 20μm.