AZ91-0.5In镁合金电机盖的压铸工艺优化

Optimization of Die Casting Process for AZ91-0.5In Magnesium Alloy Motor Cover

采用不同的工艺参数进行了AZ91-0.5In镁合金电机盖试样的压铸试验,并进行了室温力学性能测试与分析。结果表明,随压射比压增大或压射速度增快,试样的抗拉强度和屈服强度均先增大后减小,而断后伸长率在7%~9%范围内先减小后增大。当压射比压90 MPa、压射速度5 m/s时,试样的抗拉强度和屈服强度达到峰值,分别为262、171 MPa。AZ91-0.5In镁合金压铸电机盖的压射比压优选90 MPa、压射速度优选5 m/s。

The die casting test of AZ91-0.5 In magnesium alloy motor cover was carried out by using different process parameters, and the mechanical properties at room temperature were tested and analyzed. The results show that the tensile strength and yield strength of the specimens increase first and then decrease with the increase of specific pressure or injection velocity, while the elongation decreases first and then increases in the range of 7%-9%. When the specific pressure of injection is 90 MPa and the injection velocity is 5 m/s, the tensile strength and yield strength of the sample reach the peak value, which are 262 and 171 MPa, respectively. The optimum injection specific pressure of AZ91-0.5 In magnesium alloy die casting motor cover is 90 MPa, and the optimum injection speed is 5 m/s.