(中國航發(fā)北京航空材料研究院 先進高溫結(jié)構(gòu)材料重點實驗室，北京 100095)
摘 要: 基于計算流體力學(xué)模擬技術(shù)(CFD)和實驗結(jié)合的方法，設(shè)計了一種用于氣霧化制粉設(shè)備的組合式分離器，開展了高溫合金粉末分離性能研究，旨在利用不同結(jié)構(gòu)分離器性能差異直接在制粉過程中實現(xiàn)粗細顆粒分級分離。結(jié)果表明，在氬氣流量400 m3/h、粉末流量1 kg/min的工況條件下，C1結(jié)構(gòu)的分離器對細微顆粒分離效率偏低，而C2結(jié)構(gòu)的分離器對細微顆粒保持較高的分離效率，兩種結(jié)構(gòu)分離器組合能有效地實現(xiàn)粗細顆粒分級分離，從而達到縮短選區(qū)激光熔化用金屬粉末制備周期和降低成本的目的。
關(guān)鍵字: 組合式分離器；數(shù)值模擬；氣霧化制粉；選區(qū)激光熔化
（Science and Technology on Advanced High Temperature Structural Materials Laboratory, AECC Beijing Institute of Aeronautical Materials, Beijing 100095, China）
Abstract:A kind of combined separator for gas atomization equipment was designed. The combination of computational fluid dynamics(CFD) simulation and experiment were employed to investigate the separation performance. Based on the separation performance difference between two different structure separators, the coarse and fine particles can be hierarchically collected during the powder preparation process, so that the preparation cycle and the cost of alloy powder for selective laser melting(SLM) can be reduced. The results indicate that the collection efficiency of C1 structure separator for fine alloy particles is lower under the condition of argon flow rate of 400 m3/h and powder flow rate of 1kg/min, while C2 structure separator exhibits a high collection efficiency for fine alloy particles under the same gas atomization condition. These two structure separators in series connection can effectively classify fine and coarse particles, thus the separation treatment cycle in the next process can be shorten.
Key words: combined separator; numerical simulation; gas atomization powder preparation; selective laser melting
