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铝合金零曲线和凝固相变热的算法研究

Study on Arithmetic of Baseline & Heat of Transformation of Al Alloy
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摘要 本文基于液态合金凝固冷却曲线,提出了一种计算“零曲线”的新方法。以工业纯铝和ZL104合金的凝固为例,采用新改进的牛顿方法,计算凝固相变热的结果分别为409.1和387.3kJ/kg;采用有热源Fourier传热的方法,计算凝固相变热的结果分别为478.3和301.1kJ/kg。经DSC(20℃/min降温)分析,工业纯铝和ZL104合金的相变热值分别为397kJ/kg和361.8kJ/kg。实验结果表明,采用新改进牛顿方法计算合金凝固相变热的精度优于傅立叶方法,并且对热电偶的精度要求不高,特别适用于炉前快速检测。这种新方法为通过计算凝固相变热,快速评定合金凝固组织特征开辟了新的技术途径。 :Based on the cooling and solidifying curve of liquid alloy,a new arithmetic for calculating baseline has been presented,which has been found with results of experiment to be with higher accuracy in calculating heat of transformation than the Fourier analysis and without high requirements for the precision of the thermocouples hence especially suitable for rapid testing on the spot of furnace.
出处 《中国铸造装备与技术》 CAS 北大核心 2003年第4期21-23,共3页 China Foundry Machinery & Technology
关键词 铝合金 零曲线 凝固相变热 牛顿分析 傅立叶分析 冷却曲线 铸造 Baseline Heat of transformation Newton analysis Fourier analysis
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参考文献5

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