新能源汽车电池托盘用镁合金的挤压工艺优化

Extrusion Process Optimization of Magnesium Alloy for New Energy Automobile Battery Pallets

采用不同的挤压温度、挤压速度和挤压比对新能源汽车电池托盘用Mg-4Al-0.5Sn-0.1Ti镁合金试样进行了挤压成型试验,并进行了冲击吸收能和腐蚀电位的测试与分析。结果表明:与300℃挤压温度相比,360℃挤压温度下试样的冲击吸收能增大了71.42%,腐蚀电位正移了33 m V;与1 m/min挤压速度相比,4 m/min挤压速度下的冲击吸收能增大了63.64%,腐蚀电位正移了79 m V;与12挤压比相比,18挤压比下的冲击吸收能增大了33.33%,腐蚀电位正移了55 m V。优化的新能源汽车电池托盘用Mg-4Al-0.5Sn-0.1Ti镁合金的挤压工艺参数为:挤压温度360℃、挤压速度4m/min、挤压比18。

The extrusion forming experiments of Mg-4 Al-0.5 Sn-0.1 Ti magnesium alloy for new energy automobile battery pallets were carried out by using different extrusion temperature, extrusion speed and extrusion ratio, and the impact absorption energy and corrosion potential were tested and analyzed. The results show that the impact absorption energy increases by 71.42% and the corrosion potential shifts positively by 33 m V at extrusion temperature of 360℃ compared with those of extrusion temperature at 300℃;the impact absorption energy increases by 63.64% and the corrosion potential shifts positively by 79 m V at extrusion speed of 4 m/min compared with those of extrusion speed of 1 m/min;and the impact absorption energy increases by 33.33% and the corrosion potential shifts positively by 55 m V at extrusion ratio of 18 compared with those of extrusion ratio of 12. The optimized extrusion process parameters of Mg-4 Al-0.5 Sn-0.1 Ti magnesium alloy for new energy automobile battery tray are as follows: extrusion temperature of 360℃, extrusion speed of 4 m/min and extrusion ratio of 18.