CAJ | 학술논문

介绍了一种自行发明的新的雾化方法。该方法是采用含有固体介质的高速气流即气固两相流对液体金属或合金进行雾化而制备粉末的一种方法，对比研究了同等条件下普通气体雾化与两相流雾化制备粉末的特征，研究了固体雾化过程中主要工艺参数对固体雾化粉末特征的影响规律。结果表明，两相流雾化制得粉末的平均粒度约为普通气体雾化所得粉末的二分之一，而且粒度分布更集中，粉末的冷却速度比普通气体雾化高一个数量级，粉末微观组织更细小；采用液体雾化破碎准则韦伯数以衡量雾化介质的破碎能力，得出两相流雾化介质的韦伯数为气体韦伯数和颗粒流韦伯数之和，建立了两相流雾化破碎的临界方程，并以此讨论了主要工艺规律。
개소료일충자행발명적신적무화방법。해방법시채용함유고체개질적고속기류즉기고량상류대액체금속혹합금진행무화이제비분말적일충방법，대비연구료동등조건하보통기체무화여량상류무화제비분말적특정，연구료고체무화과정중주요공예삼수대고체무화분말특정적영향규률。결과표명，량상류무화제득분말적평균립도약위보통기체무화소득분말적이분지일，이차립도분포경집중，분말적냉각속도비보통기체무화고일개수량급，분말미관조직경세소；채용액체무화파쇄준칙위백수이형량무화개질적파쇄능력，득출량상류무화개질적위백수위기체위백수화과립류위백수지화，건립료량상류무화파쇄적림계방정，병이차토론료주요공예규률。
A self-invented atomization process, in which molten metal is atomized into powder by a high-velocity gas stream carrying solid particles as the atomization medium, was introduced. The characteristics of powders prepared by common gas atomization and dual-phase flow atomization under similar conditions were compared. The experimental results show that the dual-phase flow-atomized powders have average particle sizes that are one-half that of the common gas-atomized particles;additionally, they possess a finer microstructure and higher cooling rate under the same atomization gas pressure and the same gas flow. The Weber number in the crash criteria of liquid atomization is adopted to measure the crash ability of the atomization media. The Weber number of the dual-phase flow atomization medium is the sum of that of the gas and the solid particles. Furthermore, the critical equation of the crash model in dual-phase flow atomization is established, and the main regularities associated with this process were analyzed.