技術報告
大物薄肉ADC12合金ダイカストのシミュレーション技術
2021 年 93 巻 2 号 p. 81-86
詳細
2021 年 93 巻 2 号 p. 81-86
Large-sized and thin-walled ADC12 alloy aluminum die-castings are prone to unfilled defects and poor molten metal boundaries. Therefore, in this report, the relationship between undercooling and cooling rates, and that between the crystallization area and cooling rate were clarified. We developed a simulation method that takes into account the change of the latent heat of solidification depending on the cooling rate, and examined the injection conditions by parameter study. Furthermore, we performed verifications on an actual die casting machine, and successfully obtain products without unfilled defects and molten pool defects, confirming the validity of this simulation method.
