CAJ | 학술논문

应用Fourier有源热传导理论，使用装有两支热电偶的热分析样环，研究了铝合金凝固相变热的Fourier算法及其计算机辅助分析系统.测量了含Si量分别为6.34％、7.68％和8.46％铝合金的凝固相变热.计算结果分别为407、411和429 kJ/kg.与差热分析法比较，最大误差为5％，其计算精度远高于Newton算法.实验结果证明，使用凝固始点和终点的热扩散系数αs、αe和New-ton迭代法来计算凝固区间的"零"曲线具有更好的精度，所确定的"零"曲线更接近凝固相变的自然过程.说明建立在这种算法上的合金凝固质量计算机辅助冷却曲线分析系统，可广泛地用于材料加工过程的信息和参数计算.
응용Fourier유원열전도이론，사용장유량지열전우적열분석양배，연구료려합금응고상변열적Fourier산법급기계산궤보조분석계통.측량료함Si량분별위6.34％、7.68％화8.46％려합금적응고상변열.계산결과분별위407、411화429 kJ/kg.여차열분석법비교，최대오차위5％，기계산정도원고우Newton산법.실험결과증명，사용응고시점화종점적열확산계수αs、αe화New-ton질대법래계산응고구간적"령"곡선구유경호적정도，소학정적"령"곡선경접근응고상변적자연과정.설명건립재저충산법상적합금응고질량계산궤보조냉각곡선분석계통，가엄범지용우재료가공과정적신식화삼수계산.
Based on Fourier's heat conduction theory and by use of sample cup instrumented with two thermocouples, the Fourier arithmetic for calculating Al-Si alloy solidification latent heat and its computer-aided analysis system were developed. Solidification latent heat of the three kinds of Al-Si alloy contained 6.34％Si, 7.68％Si and 8.46％Si was measured on this system, and the calculation results were 407, 411 and 429 kJ/kg respectively. Compared with the difference thermal analysis value, the precision of calculating solidification latent heat is much higher than that of Newton arithmetic. The maximum error value is 5％. The experimental results show that the Fourier zero curve between solidification start point and solidification end point reflects the nature process of Al-Si alloy solidification, its shape is neither logarithm curve nor linearity curve, and therefore the zero curve calculating with heat diffuse coefficient of the solidification start point αs and end point αe and Newton's iterative method has very high precision. The computer-aided cooling curve analysis system of alloy developed on the Fourier's method can be widely used for calculation of quality information and parameter during alloy solidification.