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针对钛的特性合理地选择了制壳材料的种类, 研究了粉液比等工艺参数对涂料的悬浮性, 涂层厚度的影响, 合理地选择了面层、邻面层及背层涂料的干燥温度、湿度和时间, 并确定了适宜的微波脱蜡工艺。在不同粉液比条件下,研究了室温及不同焙烧温度对型壳抗弯强度的影响,从而确定了最佳粉液比和焙烧工艺参数。采用优化的制壳工艺参数制备的型壳, 内表面光洁、无裂纹等缺陷。采用水冷铜坩埚真空感应炉进行熔炼和浇注, 得到了外观较好的铲形薄壁铸件, 测试并分析了该铸件的表面性能。
Aiming at the characteristics of titanium, the types of shell materials were reasonably selected. The influence of parameters such as powder-liquid ratio on the suspensibility and coating thickness of the coating materials was studied. The drying of surface layer, adjacent layer and back layer coating was reasonably selected Temperature, humidity and time, and determine the appropriate microwave dewaxing process. The effects of room temperature and calcination temperature on the flexural strength of the shell were investigated under different conditions of powder to liquid ratio, so as to determine the optimum powder to liquid ratio and calcination parameters. The shell made of the optimized shell process parameters has the advantages of smooth inner surface, no crack and other defects. The water-cooled copper crucible vacuum induction furnace was used for melting and pouring to obtain a good appearance of the spatula-shaped thin-wall castings. The surface properties of the castings were tested and analyzed.