CAJ | 학술논문

采用压铸制备薄壁AlSi10MnMg铝合金铸件，用高速摄像技术记录分析压铸压射冲头的运动规律，并通过热平衡方程求解充型过程中铸件熔体和铸型之间的换热系数，最后通过数值模拟的方法讨论采用不同换热系数对充型仿真结果的影响。结果表明：充型流动长度随浇注温度的升高而增长；当充型处于液相线温度之上时，充型时间、换热系数随浇注温度的升高而增长；当充型至温度处于液相线温度以下时，充型时间和换热系数变化都很小。模拟仿真结果显示，采用基于热平衡方程求得的换热系数的计算模拟仿真结果与实验结果较一致。
채용압주제비박벽AlSi10MnMg려합금주건，용고속섭상기술기록분석압주압사충두적운동규률，병통과열평형방정구해충형과정중주건용체화주형지간적환열계수，최후통과수치모의적방법토론채용불동환열계수대충형방진결과적영향。결과표명：충형류동장도수요주온도적승고이증장；당충형처우액상선온도지상시，충형시간、환열계수수요주온도적승고이증장；당충형지온도처우액상선온도이하시，충형시간화환열계수변화도흔소。모의방진결과현시，채용기우열평형방정구득적환열계수적계산모의방진결과여실험결과교일치。
The thin-wall AlSi10MnMg aluminum alloy samples were prepared by high pressure die casting. The motion laws of press-shoot ram were recorded by a high speed camera system and the heat transfer coefficients between the casting and mold were calculated by the energy conservation equation. Therefore, the effects of different heat transfer coefficients on the simulated filling results were discussed. The results show that the filling fluidity length increases with the pouring temperature increasing;when the filling process is above the liquidus, the filling time and the heat transfer coefficient increase with the pouring temperature increasing. However, when the filling process is below the liquidus, the changes of the filling time and the heat transfer coefficient are insignificant. The simulations using the heat transfer coefficient which is calculated by the energy conservation equation are well consistent with the experimental results.