Improvement of humidity resistance of water soluble core by precipitation method

作     者：Zhang Long Li Yuancai Zhao Wei 

作者机构：State Key Laboratory of Material Processing and Die ＆ Mould Technology Huazhong University of Science and Technology Wuhan430074 China 

出 版 物：《China Foundry》 (中国铸造（英文版）)

年 卷 期：2011年第8卷第2期

页      码：212-217页

摘      要：Water soluble core has been widely used in manufacturing complex metal components with hollow configurations or internal channels;however,the soluble core can absorb water easily from the air at room *** improve the humidity resistance of the water soluble core and optimize the process parameters applied in manufacturing of the water soluble core,a precipitation method and a two-level-three-full factorial central composite design were used,*** properties of the cores treated by the precipitation method were compared with that without any *** a systematical study by means of both an environmental scanning electron microscope(ESEM) and an energy dispersive X-ray(EDX) analyzer,the results indicate that the hygroscopicity can be reduced by 20% and the obtained optimal process conditions for three critical control factors affecting the hygroscopicity are 0.2 g·mL-1 calcium chloride concentration,4% water concentration and 0 min ignition *** porous surface coated by calcium chloride and the high humidity resistance products generated in the precipitation reaction between calcium chloride and potassium carbonate may contribute to the lower hygroscopicity.

主 题 词：水溶性 沉淀法 高湿度 电阻 环境扫描电子显微镜 中心复合设计 最佳工艺条件 吸湿性能 

学科分类：0832[0832] 081702[081702] 0806[工学-电气类] 08[工学] 0817[工学-轻工类] 083201[083201] 

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