华中科技大学学报（自然科学版）Issue(3)：107-111,5.DOI:10.13245/j.hust.140323
二次微波加热制备硫酸镁水溶性砂芯试验研究
Experimental research of MgSO4 water soluble sand core hardened by twice microwave heating
摘要
Abstract
Twice microwave heating technology was applied to harden MgSO4 water soluble sand core , and the effect of kaolin reinforcement on properties of the core was tested .The performance character-istics of the MgSO4 water soluble sand core were also analyzed and compared with sodium silicate sand hardened by twice microwave heating technology .Scanning electron microscope (SEM ) was used to investigate the micro-morphology of the MgSO4 water soluble sand core ,and the optimized water sol-uble sand core was applied to cast AZ91D alloy .The results indicate that the MgSO4 water soluble sand core hardened by twice microwave heating technology has advantages of high tensile strength , excellent surface stability ,good humidity resistance ,and high removability by collapsing in the wa-ter ,which has good application prospects .The SEM analysis demonstrates that with the addition of kaolin ,there are less cracks and holes in the binder bridge of the water soluble sand core ,and the mixed-mode fracture mechanism is instead of the cohesive fracture mechanism .关键词
微波加热/强度/水溶性砂芯/SEM分析/抗吸湿性/高岭土Key words
microwave heating/strength/water soluble sand core/SEM analyzing/humidity resist-ance/kaolin分类
矿业与冶金引用本文复制引用
何家庆,樊自田,刘鑫旺,刘富初..二次微波加热制备硫酸镁水溶性砂芯试验研究[J].华中科技大学学报（自然科学版）,2014,(3):107-111,5.基金项目
国家自然科学基金资助项目（51075163，51375187）． （）
