交流电脉冲对过共晶Al-Si合金中初生Si相偏析的作用机制

张利民, 李宁, 朱龙飞, 殷鹏飞, 王建元, 吴宏景

Macrosegregation Mechanism of Primary Silicon Phase in Cast Hypereutectic Al-Si Alloys Under Alternating Electropulsing

ZHANG Limin, LI Ning, ZHU Longfei, YIN Pengfei, WANG Jianyuan, WU Hongjing

表1 电脉冲作用下过共晶Al-Si合金凝固实验参数

Table 1 The applied parameters during solidification of hypereutectic Al-Si alloys under alternating electropulsing

Exp. Mass fraction of Si / % T / K jeff / (A·cm-2) 1 14 1023 230 2 16 1073 230 3 17 1073 230 4 18 1073 230 5 20 1073 230 6 30 1173 230 7 20 1073 0 8 20 1073 110 9 20 1073 165 10 20 1073 230 11 20 1073 300 12 30 1173 0 13 30 1173 110 14 30 1173 165 15 30 1173 230 16 30 1173 300 17 30 1173 360