金属熔体结构及其控制技术的研究进展  

Progress in the Research of Melt Structure and Its Controlling Technology

作　　者：坚增运[1] 朱满[1] 介万奇[2] 

机构地区：[1]西安工业大学材料与化工学院,陕西西安710032 [2]西北工业大学凝固技术国家重点实验室,陕西西安710072

出　　处：《中国材料进展》2010年第7期20-26,41,共8页Materials China

基　　金：国家自然科学基金(50571076;50671075);国家973项目(2006CB605202)

摘　　要：综述了国内外在熔体结构研究方面的现状与进展,介绍了通过控制合金熔体的预结晶状态来改善合金组织和性能的相关技术及成果。可以得出:温度和压力可使金属熔体发生液/液结构转变,金属熔体结构随温度的变化存在滞后性,利用熔体结构随温度变化的滞后性可控制合金的凝固过程、明显细化合金的凝固组织、大大提高合金的力学性能。In present paper, the progress in the research of melt structure of metal was reviewed, besides, the concerned technologies and achievements of improving the microstructure and mechanical properties of alloy by controlling the melt status before solidification were presented. It can be reached that there exist liquid-liquid phase transitions induced by temperature and pressure in the melt. The transition of melt structure with temperature is of hysteresis. Applying the hysteresis can control the solidification behavior, greatly refine the as-solidified microstructures and remarkably improve the mechanical properties of alloy.

关 键 词：熔体结构 液/液结构转变 滞后性 过热处理 

分 类 号：TG111.4[金属学及工艺—物理冶金]