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首页> 外文期刊>Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing >The heat transfer during filling of a high-pressure die-casting shot sleeve
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The heat transfer during filling of a high-pressure die-casting shot sleeve

机译：高压压铸枪套填充过程中的热传递

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摘要

Microstructures in high-pressure die-cast products (HPDC) are important for the mechanical properties. During filling of the shot sleeve, the liquid metal dissipates superheat and solidification starts. The solidification may result in externally solidified crystals (ESCs) or cold flakes in the product [H.I. Laukli, L. Arnberg, O. Lohne, Int. J. Cast Metals Res. 18 (2005) 65-72]. The temperature of the melt in the shot sleeve is influenced by several parameters, such as liquid metal superheat, the heat transfer coefficient (HTC), surface properties of the shot sleeve and alloy composition. In order to get a better quantitative understanding of the heat loss during filling, investigations of the temperature history in both liquid metal and the shot sleeve wall have been carried out. A replica of an industrial shot sleeve was made and filling experiments were carried out. Thermocouples at different locations and depths in the melt and steel cylinder were used to measure the temperatures. The thermal field in the shot sleeve was also modelled using the simulation software MAGMASOFT~®. The results from the casting experiments and casting simulations were compared to estimate the heat transfer coefficient.
机译：高压压铸产品（HPDC）中的微结构对于机械性能很重要。在填充喷丸套筒期间，液态金属会散发过热，并开始固化。固化可能会导致产品中出现外部固化的晶体（ESC）或冷片[H.I. Laukli，L。Arnberg，O。Lohne，国际J.铸造金属研究会。 18（2005）65-72]。喷丸套筒中的熔体温度受几个参数的影响，例如液态金属过热度，传热系数（HTC），喷丸套筒的表面性能和合金成分。为了更好地定量了解填充过程中的热损失，已经对液态金属和喷丸壁的温度历史进行了研究。制成工业射击套筒的复制品，并进行填充实验。使用熔体和钢瓶中不同位置和深度的热电偶来测量温度。还使用仿真软件MAGMASOFT®对压射套筒中的热场进行了建模。比较铸造实验和铸造模拟的结果，以估算传热系数。

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