电磁感应加热冒口对铝合金铸件补缩效果的研究

Feeding Effects of Electromagnetic Induction Heating Riser on Aluminum Alloy Casting

通过三组对照试验,探究了有无感应加热冒口以及感应加热冒口有无加热套等情况下冒口对ZL101铝合金圆柱形铸件补缩效果的影响。试验研究结果表明:感应加热冒口可改变冒口的温度场,感应加热冒口对铸件的补缩效果明显优于无感应加热的冒口,它使冒口内的金属液顺利地补缩铸件,从而消除铸件内部的缩孔缩松缺陷。带有钢套的电磁感应加热冒口与无钢套的电磁感应加热冒口相比,其补缩效果更好。本文还对感应加热冒口的补缩效果进行了模拟研究,试验结果验证了模拟结果的准确性。

By designing three groups of comparison experiments, the feeding effects of risers on ZL101 aluminum alloy cylindrical castings with a common riser, with an electromagnetic induction heating riser, and with an electromagnetic induction heating riser containing a steel sleeve, were investigated, respectively. The experimental results show that the feeding effect of the electromagnetic induction heating riser on the cylindrical casting is much better than that of the conventional riser. It was found that the electromagnetic induction heating can change the temperature field distribution of the riser and facilitate the smooth filling of the molten metal in the riser into the casting, thus eliminating the shrinkage porosity defects of the casting. The research results also show that the feeding effect of the electromagnetic induction heating riser containing a steel sleeve is better than that riser containing no sleeve. In the paper, the feeding effects of the electromagnetic induction heating risers were simulated, and the simulation results were compared with the actual experimental results. It was found that the simulation and experimental results are basically in good agreement.