氧化铝陶瓷粉对压铸生产中 NaCl-Na2CO3 铁芯高温强度的影响及机理研究

IF 2.6 3区 材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING International Journal of Metalcasting Pub Date : 2024-07-08 DOI:10.1007/s40962-024-01400-x
Yang Li, Lai Song, Guangyu Chen, Weihua Liu, Jingkai Zhang, Changyu Sun, Xue Zou, Minghui Bai
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引用次数: 0

摘要

水溶性盐芯材料在室温下具有很高的抗弯强度。在高压铸造过程中,水溶性盐芯必须承受高温和冲击载荷。为获得适用于高压铸造部件的复合水溶性盐芯,可使用氯化钠和碳酸钠作为基盐材料。在通过重力浇铸制备具有优异高温强度的水溶性复合盐芯时,使用了氧化铝陶瓷颗粒作为增强材料。对盐芯和断裂面的微观结构进行了观察和表征。使用氧化铝提高二元盐芯的灵敏度,可获得较低的热裂纹灵敏系数。分散在基体中的氧化铝颗粒可防止裂纹扩展。模拟结果表明,铝酸钠与盐芯中的其他成分具有很强的界面结合能力,从而影响了盐芯的高温强度。进一步的结果证实,铝酸钠的形成可提高盐芯的高温强度。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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A Study of the Influence and Mechanism of Alumina Ceramic Powder on the High-Temperature Strength of NaCl–Na2CO3 Cores in Die-Casting Production

Water-soluble salt core materials have high bending strength at room temperature. During high-pressure casting, water-soluble salt cores must withstand high temperatures and impact loads. To obtain a composite water-soluble salt core suitable for high-pressure casting components, sodium chloride and sodium carbonate are used as base salt materials. Ceramic particles of alumina are used as reinforcement materials in the preparation of a water-soluble composite salt core with excellent high-temperature strength via gravity casting. The microstructures of the salt core and fracture surface are observed and characterized. The use of alumina to enhance the sensitivity of the binary salt cores results in a low thermal crack sensitivity coefficient. The alumina particles dispersed in the matrix prevent crack propagation. Simulation results show that sodium aluminate has strong interfacial bonding abilities with other components in the salt core, affecting its high-temperature strength. Further results confirm that sodium aluminate formation enhances the high-temperature strength of salt cores.

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来源期刊
International Journal of Metalcasting
International Journal of Metalcasting 工程技术-冶金工程
CiteScore
4.20
自引率
42.30%
发文量
174
审稿时长
>12 weeks
期刊介绍: The International Journal of Metalcasting is dedicated to leading the transfer of research and technology for the global metalcasting industry. The quarterly publication keeps the latest developments in metalcasting research and technology in front of the scientific leaders in our global industry throughout the year. All papers published in the the journal are approved after a rigorous peer review process. The editorial peer review board represents three international metalcasting groups: academia (metalcasting professors), science and research (personnel from national labs, research and scientific institutions), and industry (leading technical personnel from metalcasting facilities).
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