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首页> 外文期刊>International Journal of Heat and Mass Transfer >Determination Of The Heat Transfer Coefficient At Metal-die Interface Of High Pressure Die Casting Process Of Am50 Alloy
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Determination Of The Heat Transfer Coefficient At Metal-die Interface Of High Pressure Die Casting Process Of Am50 Alloy

机译：Am50合金高压压铸工艺金属模界面传热系数的确定

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摘要

This paper focuses on the determination of the interfacial heat transfer coefficient (IHTC) at the metal-die interface in the high pressure die casting (HPDC) process. Experiment was conducted and a "step shape" casting was used to cast a magnesium alloy AM50 against a H13 steel die. Based on the temperature measurements inside the die, IHTC was determined by applying an inverse approach. The influences of the step thickness and process parameters on the IHTC were investigated. Results show that the shape of IHTC profiles is different at different steps and the duration for IHTC to maintain a higher value grows as the step thickness increases. The influence of process parameters is mainly on the IHTC peak value. For thinner steps, a higher fast shot velocity leads to a higher IHTC peak value. But for thicker steps such as Step 5, the casting pressure shows a more prominent influence on the IHTC peak value. Also, at these thicker steps a lower initial die surface temperature always leads to a higher IHTC peak value.
机译：本文着重确定高压压铸（HPDC）工艺中金属模具界面的界面传热系数（IHTC）。进行实验，并使用“阶梯形”铸造将镁合金AM50铸造在H13钢模具上。根据模具内部的温度测量结果，通过应用逆方法确定IHTC。研究了台阶厚度和工艺参数对IHTC的影响。结果表明，IHTC轮廓的形状在不同的步骤中会有所不同，并且IHTC保持较高值的持续时间会随着步长的增加而增加。工艺参数的影响主要是对IHTC峰值的影响。对于较薄的台阶，较高的快射速度会导致较高的IHTC峰值。但是对于较厚的步骤（如步骤5），铸造压力对IHTC峰值显示出更显着的影响。同样，在这些较厚的步骤中，较低的初始模具表面温度始终会导致较高的IHTC峰值。

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