亚共晶铝硅合金晶粒度热分析法评估判据  

Evaluation Criterions of Grain Refinement for Hypoeutectic Al-Si Alloy by Thermal Analysis

作　　者：郝启堂[1] 陈洪升[1] 毕维生[1] 

机构地区：[1]哈尔滨工业大学

出　　处：《铸造》1994年第5期2-6,共5页Foundry

摘　　要：从液态合金凝固的热力学、动力学及传热学角度，对铸造合金的晶粒细化过程作了分析，综合现有的铝硅合金晶粒细化度热分析法评估判据，针对晶体的形核和长大过程，提出了“过冷面积和团相生长加速度”的晶粒细化度的评估判据。Based on thermal dynamics, billetics and heat--transfer of solidification of the liquid metal, the grain refining treatments has been analyzed in the field of casting alloys. The existing evaluation criterions for grain refinement of Al--Si alloys by thermal analysis were reviewed. According to nucleation and growth of crystals, the new evaluation criterions of 'undercooling area and growth acceleration of solid phase' were suggested.

关 键 词：铝硅合金 铸造合金 晶粒度 热分析 

分 类 号：TG27[金属学及工艺—铸造]