Analysis on recalescence and nucleation of undercooled Cu-20%Pb hypomonotectic alloy;
深过冷Cu-20%Pb亚偏晶合金的再辉与形核分析
During solidification it was found that only once recalescence occurred for those melts with low undercoolings (<147K), and twice recalesences were observed for those melts with high undercoolings (≥147K).
研究了CuPb偏晶合金凝固组织随过冷度的演化规律,探讨了深过冷下合金的凝固机制,发现合金在小过冷度(<147K)情况下只有一次再辉,而在大过冷度下(≥147K)有两次再辉现象。
The research result shows that: The character of nucleation is obvious relatively along the cooling graph of the negative temperature gradient melt solidification; The character of "second recalescence" appears ob.
研究了63～292K热力学过冷度范围内,Cu-Ni单相合金的凝固组织演化规律,分析了负温度梯度熔体凝固过程中的形核与再辉行为。