CAJ | 학술논문

在传统平面流铸技术的基础上，研究出一种新的金属粉末制取技术——改性平面流铸粉末化技术。将改性平面流铸粉末化工艺过程分为平面液流的形成、平面液流的破碎和金属粉末的形成3个主要阶段，对这3个阶段建立了完整的数学模型，并对Sn60Pb40合金粉末化过程进行了数值计算。计算了平面液流形成过程动态熔潭中熔融金属液的温度场和流场，以及所得金属粉末的尺寸，计算结果与实验结果相吻合。考察了喷嘴几何尺寸、雾化室气氛气体密度等主要工艺参数对改性平面流铸粉末化工艺的影响。
재전통평면류주기술적기출상，연구출일충신적금속분말제취기술——개성평면류주분말화기술。장개성평면류주분말화공예과정분위평면액류적형성、평면액류적파쇄화금속분말적형성3개주요계단，대저3개계단건립료완정적수학모형，병대Sn60Pb40합금분말화과정진행료수치계산。계산료평면액류형성과정동태용담중용융금속액적온도장화류장，이급소득금속분말적척촌，계산결과여실험결과상문합。고찰료분취궤하척촌、무화실기분기체밀도등주요공예삼수대개성평면류주분말화공예적영향。
Based on the traditional planar flow casting technique, a new powder process named modified planar flow casting atomization was developed. The whole atomization process can be divided into three main stages, namely, the formation of a thin liquid metal ribbon, the disintegration of the molten metal ribbon and the obtaining of metal powder. A complete mathematical model for these three stages was established, and numerical computation of the modified planar flow casting atomization process for Sn60Pb40 alloy was carried out. The flow field and temperature field of molten metal in the dynamic puddle between the nozzle and wheel gap were simulated during the course of liquid metal ribbon formation, and the sizes of metal powder produced were numerically computed. It was found that the computed results agreed well with the experimental ones. The effects of main technological parameters, such as nozzle size, air density in the atomization box, on the modified planar flow casting atomization process were discussed.