熔体深过冷过共晶铝硅合金的凝固组织研究  

Study on Solidification Microstructure of Melt Supercooled Hypereutectic Al-Si Alloy

作　　者：周涵 刘亚[1,2] 吴长军[1,2] 王建华[1,2] 苏旭平[1,2] ZHOU Han;LIU Ya;WU Changjun;WANG Jianhua;SU Xuping(Key Laboratory of Materials Surface Science and Technology of Jiangsu Province,Changzhou University,Changzhou 213164,Jiangsu,China;Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering,Changzhou University,Changzhou 213164,Jiangsu,China)

机构地区：[1]常州大学江苏省材料表面科学与技术重点实验室,江苏常州213164 [2]常州大学江苏省光伏科学与工程协同创新中心,江苏常州213164

出　　处：《材料导报》2023年第12期180-185,共6页Materials Reports

基　　金：国家自然科学基金(52071032)。

摘　　要：本工作采用熔体急冷装置对过共晶铝硅熔体进行深过冷处理,采用光学显微镜、扫描电子显微镜和X射线衍射仪等手段,研究了硅含量和熔炼工艺对熔体深过冷过共晶铝硅合金凝固组织的影响。研究结果表明,合金在800℃熔炼,保温时间为30 min时,熔体深过冷处理可抑制Al-(14~18)Si合金熔体在凝固过程中初晶硅的析出。当Al-18Si合金在800℃熔炼,保温时间超过30 min时,深过冷Al-18Si合金熔体在室温金属模型中凝固时可完全抑制初晶硅的析出,获得无初晶硅的凝固组织。In this work,hypereutectic Al-Si melt was treated by melt quenching device.The effects of Si content and smelting process on the solidifica-tion microstructure of hypereutectic Al-Si alloys were investigated by means of optical microscope,scanning electron microscope and X-ray diffractometer.The results show that when hypereutectic Al-Si alloy was melted at 800℃for 30 min,melt supercooling could inhibit the precipitation of primary Si during the solidification process of Al-(14-18)Si alloy.When Al-18Si alloy was melted at 800℃for more than 30 min,the precipi-tation of primary Si could be completely inhibited if the melt supercooled Al-18Si alloy was solidified in room temperature metal mold and the solidi-fication microstructure without primary Si could be obtained.

关 键 词：过共晶铝硅合金 熔体深过冷 初晶硅 凝固组织 

分 类 号：TG146.21[一般工业技术—材料科学与工程]