论文部分内容阅读
通过金相组织分析和拉伸性能测试,研究了均匀化温度和保温时间对铸态AZ31镁合金显微组织和拉伸强度的影响,据此分析了均匀化处理的最佳工艺参数。结果表明,均匀化工艺能有效消除铸造组织中沿晶界分布的树枝状金属间化合物Mg17Al12,可通过提高塑性和降低硬度来改善合金的热加工性能。通过对比组织和性能,铸态AZ31镁合金最佳的均匀处理化工艺为420℃×12 h。
The effects of homogenization temperature and holding time on the microstructure and tensile strength of as-cast AZ31 magnesium alloy were studied by means of microstructure analysis and tensile properties test. The optimum process parameters for homogenization were analyzed. The results show that the homogenization process can effectively eliminate the dendritic intermetallic compound Mg17Al12 distributed along the grain boundaries in the cast structure, and improve the hot workability of the alloy by improving the plasticity and reducing the hardness. By comparing the microstructure and properties, the best AZ31 magnesium alloy as-cast alloy is 420 ℃ × 12 h.