介绍了一种新的热分析冷却曲线模式识别方法,用以评估Al-7Si合金的细化效果.采用冷却曲线凝固段(由大量初晶形核温度到大量共晶形核温度)作为标识,利用数据库建立冷却曲线与晶粒尺寸(细化处理效果)间的关系,通过冷却曲线模式识别结合数据库的方式测评Al-7Si合金的细化处理效果.结果表明:当表征冷却曲线间相似性的综合偏差值Ω趋近于0时,晶粒尺寸间的差向0收敛.在一定的凝固条件下,待测熔体的细化处理效果可通过数据库中与待测熔体的冷却曲线最相近曲线所对应的细化处理效果来定量评估.
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