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首页> 外文期刊>The International Journal of Advanced Manufacturing Technology >Fabrication and characterization of high-strength water-soluble composite salt core for zinc alloy die castings
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Fabrication and characterization of high-strength water-soluble composite salt core for zinc alloy die castings

机译：锌合金压铸高强度水溶性复合盐芯的制造与鉴定

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摘要

A water-soluble salt core (WSSC) strengthened by reinforcing particles, including bauxite powder, glass fiber powder, and sericite powder, was fabricated by gravity-casting process. The surface quality, bending strength, water solubility, humidity resistance, and shrinkage rate of WSSC were investigated, and the synergistic effect between the different reinforcements on the bending strength was analyzed. Scanning electron microscope (SEM) was used to study the micromorphology of WSSC. The results indicate that the binary composite WSSC after being strengthened has excellent comprehensive performance, the bending strength increases by more than 1.4 times with the maximum value of 47.89 +/- 0.83 MPa whose 24-h hygroscopic coefficient is lower than 0.18%, the water solubility rate is higher than 163.97 kg/(min m(3)) in still water at 80 A degrees C, and the shrinkage rate is dramatically lower than that without any reinforced materials; in addition, there are no obvious casting defects on the core surface. The microscopic analysis demonstrates that the homogeneous distribution of the reinforcements in the matrix consumes more energy during the crack propagation procedure and the grain refinement of WSSC is also observed, above which is the main reason for the improvement of the bending strength. Furthermore, the practical casting test of the complex soluble salt core prepared by pressure core making was used for zinc alloy die casting.
机译：通过重力铸造工艺制造通过增强颗粒加强的水溶性盐芯（WSSC），包括铝土矿粉末，玻璃纤维粉末和半岩粉末。研究了WSSC的表面质量，弯曲强度，水溶性，湿度，耐湿度和收缩率，分析了不同增强件对弯曲强度的协同效应。扫描电子显微镜（SEM）用于研究WSSC的微晶。结果表明，增强后的二元复合WSSC具有优异的综合性能，弯曲强度的最大值增加了47.89 +/- 0.83MPa的最大值，其24-H吸湿系数低于0.18％，水在80℃的静止水中溶解率高于163.97kg /（min m（3）），并且收缩速率显着低于没有任何增强材料的情况;此外，芯表面上没有明显的铸造缺陷。微观分析表明，在基质中的增强物的均匀分布在裂纹传播过程中消耗更多能量，并且还观察到WSSC的晶粒细化，上述是改善弯曲强度的主要原因。此外，使用压力芯制剂制备的复杂可溶性盐芯的实际浇铸试验用于锌合金压铸。

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