【摘要】 以钛合金精密铸件用CaO基陶瓷型芯的开发为背景，对行星式球磨仪参数对CaO粉末研磨的影响进行研究。分析了进料粒径、球料比和磨球填充率对CaO粉体粒度分布的影响，结果显示提高了粒度分布在目标区间（75～150μm）的CaO粉体的出粉率和台时产量。随后研究了不同制粉设备对CaO粉体圆度的影响，并研究了球磨粉末占比对坯料流动性的影响。最后本文采用注射成型技术制备了CaO基陶瓷型芯，并研究了坯料中球磨粉末占比对陶瓷型芯微观结构和性能的影响。结果发现，球磨粉末拥有更高的圆度，随着球磨粉末在坯料中占比提高，坯料流动性和陶瓷型芯的抗弯强度得到了提高。更多还原

【Abstract】 The influence of the parameters of the planetary ball mill on the grinding of CaO powder was investigated against the background of the development of CaO-based ceramic cores for titanium alloy precision castings. The effects of feed particle size, ball material ratio and grinding ball filling rate on the particle size distribution of CaO powder were analyzed, and the results showed that the milling rate and table hour output of CaO powder with particle size distribution in the target interval(75～150 μm)were improved. Subsequently, the effect of different powder making equipment on the roundness of CaO powder was investigated, and the effect of the percentage of ball milled powder on the fluidity of blanks was studied. Finally, in this paper, CaO-based ceramic cores were prepared by injection molding technology, and the effects of the percentage of ball-milled powder in the blanks on the microstructure and properties of the ceramic cores were investigated. It was found that the ball milled powder possessed higher roundness, and the flowability of the blank and the flexural strength of the ceramic cores were improved with the increase of the percentage of ball milled powder in the blank.更多还原